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Cheng Y, Peng Y, Cao LM, Huang XF, He LY. Identifying the geospatial relationship of surface ozone pollution in China: Implications for key pollution control regions. Sci Total Environ 2024; 930:172763. [PMID: 38670373 DOI: 10.1016/j.scitotenv.2024.172763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 04/28/2024]
Abstract
Surface ozone pollution, as a pressing environmental concern, has garnered widespread attention across China. Due to air mass transport, effective control of ozone pollution is highly dependent on collaborative efforts across neighboring regions. However, specific regions with strong internal interactions of ozone pollution are not yet well identified. Here, we introduced the Geospatial SHapley Additive exPlanation (GeoSHAP) approach, which primarily involves machine learning and geostatistical algorithms. Based on extensive atmospheric environmental monitoring data from 2017 to 2021, machine learning models were employed to train and predict ozone concentrations at the target location. The R2 values on the test sets of different scale regions all reached 0.98 in the overall condition, indicating that the core model has good accuracy and generalization ability. The results highlight key regions with high ozone geospatial relationship (OGR) index, predominantly located in the Northern District (ND), spanning the Fen-Wei Plain, the Loess Plateau, and the North China Plain, as well as within portions of the Yangtze River Delta (YRD) and the Pearl River Delta (PRD). Further investigation indicated that high geospatial relationships stem from a synergy between anthropogenic and natural factors, with anthropogenic factors serving as a pivotal element. This study revealed key regions with the most urgent need for joint control of anthropogenic sources to mitigate ozone pollution.
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Affiliation(s)
- Yong Cheng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yan Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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2
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Kong YQ, Dong XX, Zhang N, Wang Z, Mao JX, Gao XR, Huang XF. Long-Term Outcome of Photobiomodulation Therapy for Refractory Diabetic Wound After Secretory Carcinoma of the Parotid Gland Surgery: A Case Report. Photobiomodul Photomed Laser Surg 2024; 42:383-388. [PMID: 38574328 DOI: 10.1089/photob.2023.0119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024] Open
Abstract
Objective: To evaluate the efficacy and safety of photobiomodulation therapy (PBMT) in the treatment of diabetic patients with refractory wound. Background: Refractory wound is one of the most challenging clinical complications of diabetes mellitus. Studies have shown that PBMT can promote wound healing in many ways. Methods: We reported a 55-year-old male patient with refractory diabetic wound after secretory carcinoma of the parotid gland surgery responding to 810 nm laser. Results: After PBMT, the refractory diabetic wound healed gradually without adverse events. During follow-up 5-years, the healed wound remained stable and showed no signs of recurrence. Conclusions: PBMT can be potentially considered as a therapeutic method in diabetic patients with refractory diabetic wound.
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Affiliation(s)
- Ya-Qun Kong
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Xi Dong
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Institute of Biomedical Engineering, Tianjin, China
| | - Ning Zhang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zhen Wang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Ji-Xiong Mao
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xin-Rui Gao
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Feng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Wang JR, Li RQ, Huang XF. [Research progress in functional regeneration methods and mechanisms of taste buds]. Zhonghua Kou Qiang Yi Xue Za Zhi 2024; 59:389-393. [PMID: 38548597 DOI: 10.3760/cma.j.cn112144-20231012-00190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Gustation is one of the most important human senses. Taste dysfunctions, which may be due to aging, tongue cancer surgery, radiotherapy and chemotherapy, affect life quality. That is why the need for taste bud regeneration has received more attention. At present, research on development and renewal of taste cells provides a basis for taste bud regeneration; molecular mechanisms related to taste bud regeneration are being continuously uncoverd, aiding in the identification of more accurate targets for therapy. New methods such as nerve regeneration, tissue engineering, and cytokine therapy have emerged. The author reviews the mechanism and the latest methods of taste bud regeneration of lingual epithelium, aiming to open new horizions for the prevention and treatment of gustatory diseases, and provide theoretical references for its regeneration.
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Affiliation(s)
- J R Wang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - R Q Li
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - X F Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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4
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Yang YL, Zeng WH, Peng Y, Zuo SY, Fu YQ, Xiao YM, Huang WL, Wen ZY, Hu W, Yang YY, Huang XF. Characterization of three lamp genes from largemouth bass ( Micropterus salmoides): molecular cloning, expression patterns, and their transcriptional levels in response to fast and refeeding strategy. Front Physiol 2024; 15:1386413. [PMID: 38645688 PMCID: PMC11026864 DOI: 10.3389/fphys.2024.1386413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/14/2024] [Indexed: 04/23/2024] Open
Abstract
Lysosomes-associated membrane proteins (LAMPs), a family of glycosylated proteins and major constituents of the lysosomal membranes, play a dominant role in various cellular processes, including phagocytosis, autophagy and immunity in mammals. However, their roles in aquatic species remain poorly known. In the present study, three lamp genes were cloned and characterized from Micropterus salmoides. Subsequently, their transcriptional levels in response to different nutritional status were investigated. The full-length coding sequences of lamp1, lamp2 and lamp3 were 1251bp, 1224bp and 771bp, encoding 416, 407 and 256 amino acids, respectively. Multiple sequence alignment showed that LAMP1-3 were highly conserved among the different fish species, respectively. 3-D structure prediction, genomic survey, and phylogenetic analysis were further confirmed that these genes are widely existed in vertebrates. The mRNA expression of the three genes was ubiquitously expressed in all selected tissues, including liver, brain, gill, heart, muscle, spleen, kidney, stomach, adipose and intestine, lamp1 shows highly transcript levels in brain and muscle, lamp2 displays highly expression level in heart, muscle and spleen, but lamp3 shows highly transcript level in spleen, liver and kidney. To analyze the function of the three genes under starvation stress in largemouth bass, three experimental treatment groups (fasted group and refeeding group, control group) were established in the current study. The results indicated that the expression of lamp1 was significant induced after starvation, and then returned to normal levels after refeeding in the liver. The expression of lamp2 and lamp3 exhibited the same trend in the liver. In addition, in the spleen and the kidney, the transcript level of lamp1 and lamp2 was remarkably increased in the fasted treatment group and slightly decreased in the refed treatment group, respectively. Collectively, our findings suggest that three lamp genes may have differential function in the immune and energetic organism in largemouth bass, which is helpful in understanding roles of lamps in aquatic species.
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Affiliation(s)
- Yan-Lin Yang
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Wan-Hong Zeng
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Yong Peng
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Shi-Yu Zuo
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Yuan-Qi Fu
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Yi-Ming Xiao
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Wen-Li Huang
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Zheng-Yong Wen
- Key Laboratory of Sichuan Province for Fishes Conservation and Utilization in the Upper Reaches of the Yangtze River, Neijiang Normal University, Neijiang, China
| | - Wei Hu
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
- Key Laboratory of Sichuan Province for Fishes Conservation and Utilization in the Upper Reaches of the Yangtze River, Neijiang Normal University, Neijiang, China
| | - Yu-Ying Yang
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
| | - Xiao-Feng Huang
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China
- School of Animal Science, Yangtze University, Jingzhou, China
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Tang MX, He LY, Xia SY, Jiang Z, He DY, Guo S, Hu RZ, Zeng H, Huang XF. Coarse particles compensate for missing daytime sources of nitrous acid and enhance atmospheric oxidation capacity in a coastal atmosphere. Sci Total Environ 2024; 915:170037. [PMID: 38232856 DOI: 10.1016/j.scitotenv.2024.170037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/19/2024]
Abstract
Large missing sources of daytime atmospheric nitrous acid (HONO), a vital source of hydroxyl radicals (OH) through its photolysis, frequently exist in global coastal regions. In this study, ambient HONO and relevant species were measured at a coastal site in the Pearl River Delta (PRD), China, during October 2019. Relatively high concentrations (0.32 ± 0.19 ppbv) and daytime peaks at approximately 13:00 of HONO were observed, and HONO photolysis was found to be the dominant (55.5 %) source of the primary OH production. A budget analysis of HONO based on traditional sources suggested large unknown sources during the daytime (66.4 %), which had a significant correlation with the mass of coarse particles (PM2.5-10) and photolysis frequency (J(NO2)). When incorporating photolysis of the abundant nitrate measured in coarse particles with a reasonable enhancement factor relative to fine particles due to favorable aerosol conditions, the missing daytime sources of HONO could be fully compensated by coarse particles serving as the largest source at this coastal site. Our study revealed great potential of coarse particles as a strong daytime HONO source, which has been ignored before but can efficiently promote NOx recycling and thus significantly enhance atmospheric oxidation capacity.
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Affiliation(s)
- Meng-Xue Tang
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ling-Yan He
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
| | - Shi-Yong Xia
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhen Jiang
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Dong-Yi He
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Song Guo
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Ren-Zhi Hu
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Hui Zeng
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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6
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Huang XF, Xue Y, Yong L, Wang TT, Luo P, Qing LS. Chemical derivatization strategies for enhancing the HPLC analytical performance of natural active triterpenoids. J Pharm Anal 2024; 14:295-307. [PMID: 38618252 PMCID: PMC11010456 DOI: 10.1016/j.jpha.2023.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/06/2023] [Accepted: 07/06/2023] [Indexed: 04/16/2024] Open
Abstract
Triterpenoids widely exist in nature, displaying a variety of pharmacological activities. Determining triterpenoids in different matrices, especially in biological samples holds great significance. High-performance liquid chromatography (HPLC) has become the predominant method for triterpenoids analysis due to its exceptional analytical performance. However, due to the structural similarities among botanical samples, achieving effective separation of each triterpenoid proves challenging, necessitating significant improvements in analytical methods. Additionally, triterpenoids are characterized by a lack of ultraviolet (UV) absorption groups and chromophores, along with low ionization efficiency in mass spectrometry. Consequently, routine HPLC analysis suffers from poor sensitivity. Chemical derivatization emerges as an indispensable technique in HPLC analysis to enhance its performance. Considering the structural characteristics of triterpenoids, various derivatization reagents such as acid chlorides, rhodamines, isocyanates, sulfonic esters, and amines have been employed for the derivatization analysis of triterpenoids. This review comprehensively summarized the research progress made in derivatization strategies for HPLC detection of triterpenoids. Moreover, the limitations and challenges encountered in previous studies are discussed, and future research directions are proposed to develop more effective derivatization methods.
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Affiliation(s)
- Xiao-Feng Huang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ying Xue
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
- Sichuan Center for Disease Control and Prevention, Chengdu, 610041, China
| | - Li Yong
- Sichuan Center for Disease Control and Prevention, Chengdu, 610041, China
| | - Tian-Tian Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
- State Key Laboratory for Quality Research in Chinese Medicines, Macau University of Science and Technology, Macao, China
| | - Pei Luo
- State Key Laboratory for Quality Research in Chinese Medicines, Macau University of Science and Technology, Macao, China
| | - Lin-Sen Qing
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
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7
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Kong YQ, Dong XX, Wu B, Shu P, Li CX, Bao WW, Zheng XW, Liu J, Cheng ML, Yang YQ, Huang XF. A Novel Air-Cooled Nd:YAG Laser for the Treatment of the Venous Lakes of the Lips. Photobiomodul Photomed Laser Surg 2024; 42:230-237. [PMID: 38417045 DOI: 10.1089/photob.2023.0105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024] Open
Abstract
Objective: To evaluate the therapeutic effect of a novel air-cooled Nd:YAG laser in the venous lakes of the lips (VLL). Background: The thermal injury is one of the most important issues during laser therapy for venous lakes. Methods: Six pieces of fresh pork livers were used to provide 30 regions with a diameter of 6 mm for experiment in vitro, among which 15 regions were treated by Nd:YAG laser with air cooling until the tissue turned gray-white, whereas the rest were treated without air cooling as control. The operation time of laser irradiation, the degree of temperature increase, and the depth of coagulation tissue were compared between two groups. Then, 60 VLL patients were selected for Nd:YAG laser treatment with or without air cooling. The operation time of laser irradiation, the degree of temperature increase, the postoperative pain visual analog scale (VAS) score, and the percentage of lesions removed within 1 month were compared. Results: In tissue studies, the treated group showed a longer operation time of laser irradiation (p < 0.01), a lower degree of temperature increase (p < 0.01), and there was no significant statistical difference in the depth of coagulation tissue (p = 0.624). In clinical studies, the treated group showed a longer operation time of laser irradiation (p < 0.01), a lower degree of temperature increase (p < 0.01), and a lower VAS score on the 1st and 2nd day, compared with the control group (p < 0.01). Conclusions: Air cooling during Nd:YAG laser for the treatment of VLL can prolong the surgical time, but lowered tissue temperature and reduced patient pain within 2 days under the premise of ensuring the treatment effect.
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Affiliation(s)
- Ya-Qun Kong
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Xi Dong
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Institute of Biomedical Engineering, Tianjin, China
| | - Bin Wu
- Department of Stomatology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Ping Shu
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Chang-Xu Li
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Wei-Wei Bao
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Wan Zheng
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Juan Liu
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Meng-Lin Cheng
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yu-Qing Yang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Feng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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8
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Mei Z, Lin YX, Yao PS, Wang F, Huang XF, Lin H, Hu XQ, Lin YQ, Gao L, Kang DZ. [Diagnostic value of high frequency oscillation in localization of type Ⅱ focal cortical dysplasia epilepsy]. Zhonghua Yi Xue Za Zhi 2024; 104:614-617. [PMID: 38389239 DOI: 10.3760/cma.j.cn112137-20231019-00826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Retrospective analysis was conducted on 9 patients with type Ⅱ focal cortical dysplasia (FCD) who underwent stereo-electroencephalography (SEEG) implantation in the Department of Neurosurgery of the First Affiliated Hospital of Fujian Medical University from November 2020 to February 2023. The onset area, onset time, and frequency of high-frequency oscillations (HFO) were analyzed and the correlation of HFOs with interictal, preictal, and ictal periods. SEEG recordings of 80-500 Hz HFOs were observed in both interictal and ictal periods in 9 patients, with 6 patients exhibiting fast ripples (FR) in the range of 250-500 Hz. Surgical resection of the seizure onset area and FR-generating electrodes was performed, and postoperative follow-up for over 2 years indicated Engel I in 5 cases. 6 patients showed continuous discharge during the preictal period, and the distribution index of continuous discharge was positively correlated with seizure frequency. HFOs in the range of 80-500 Hz were present in all four seizure onset patterns during the ictal period. The onset area and FR-emitting electrode were surgically removed in 6 patients with continuous discharge and overlapping HFOs during the preictal period, with 5 cases of Engel I. Type Ⅱ FCD discharges exhibited complexity, high discharge indices, and a close association with HFOs. Compared with the spike wave, the electrode range of HF is more limited, and the incidence of HF before attack is significantly increased, which is closely correlated with the onset area. The simultaneous occurrence of HFO and the spike waves has higher diagnostic value than the individual occurrence, effectively enhancing surgical efficacy.
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Affiliation(s)
- Z Mei
- Department of Neurosurgery, First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - Y X Lin
- Department of Neurosurgery, First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - P S Yao
- Fujian Institute of Brain Disorders and Brain Science, Fuzhou 350005, China
| | - F Wang
- Fujian Clinical Research Center for Neurological Diseases, Fuzhou 350005, China
| | - X F Huang
- Department of Neurosurgery, First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - H Lin
- Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - X Q Hu
- Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - Y Q Lin
- Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - L Gao
- Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - D Z Kang
- Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
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Chen XY, Wang TT, Shen Q, Ma H, Li ZH, Yu XN, Huang XF, Qing LS, Luo P. Preclinical Investigations on Anti-fibrotic Potential of Long-Term Oral Therapy of Sodium Astragalosidate in Animal Models of Cardiac and Renal Fibrosis. ACS Pharmacol Transl Sci 2024; 7:421-431. [PMID: 38357273 PMCID: PMC10863439 DOI: 10.1021/acsptsci.3c00264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 12/08/2023] [Accepted: 12/19/2023] [Indexed: 02/16/2024]
Abstract
In traditional Chinese medicine, Radix Astragali has played a vital role in treating progressive fibrotic diseases. One of its main active components, astragaloside IV, is a promising anti-fibrotic treatment despite its extremely low bioavailability. Our study aimed to optimize sodium astragalosidate (SA) by salt formation to improve solubility and oral absorption for anti-fibrotic therapy in vivo. Isoproterenol-induced myocardial fibrosis rat models and obese BKS-db mice presenting diabetic kidney fibrosis were used in this study. Daily oral administration of SA (20 mg/kg) for 14 days ameliorated cardiac fibrosis by reducing collagen accumulation and fibrosis-related inflammatory signals, including TNF-α, IL-1β, and IL-6. In db/db mice, SA (5,10, and 20 mg/kg per day for 8 weeks) dose-dependently alleviated lipid metabolism impairment and renal dysfunction when administered orally. Furthermore, Western blot and immunohistochemistry analyses demonstrated that SA treatment inhibited renal fibrosis by suppressing TGF-β1/Smads signaling. Taken together, our findings provide the oral-route medication availability of SA, which thus might offer a novel lead compound in preclinical trial-enabling studies for developing a long-term therapy to treat and prevent fibrosis.
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Affiliation(s)
- Xiao-Yi Chen
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
- Institute
of Medicinal Biotechnology, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100050, China
| | - Tian-Tian Wang
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
- Chengdu
Institute of Biology, Chinese Academy of
Sciences, Chengdu 610041, China
| | - Qing Shen
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
- Collaborative
Innovation Center of Seafood Deep Processing, Zhejiang Province Joint
Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Hao Ma
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
| | - Zhan-Hua Li
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
| | - Xi-Na Yu
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
| | - Xiao-Feng Huang
- Chengdu
Institute of Biology, Chinese Academy of
Sciences, Chengdu 610041, China
| | - Lin-Sen Qing
- Chengdu
Institute of Biology, Chinese Academy of
Sciences, Chengdu 610041, China
| | - Pei Luo
- State
Key Laboratories for Quality Research in Chinese Medicines, Faculty
of Pharmacy, Macau University of Science
and Technology, Macau 999078, China
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10
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Li ZJ, He LY, Ma HN, Peng X, Tang MX, Du K, Huang XF. Sources of atmospheric oxygenated volatile organic compounds in different air masses in Shenzhen, China. Environ Pollut 2024; 340:122871. [PMID: 37926416 DOI: 10.1016/j.envpol.2023.122871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/07/2023]
Abstract
As precursors of photochemical secondary pollutants, oxygenated volatile organic compounds (OVOCs) play an important role in atmospheric photochemistry. In this study, 23 OVOCs were monitored using a commercial proton transfer reaction time-of-flight mass spectrometer at an urban site in Shenzhen, China. During the campaign, the mean total concentration of OVOCs was 23.3 ± 15.5 ppb (mean ± standard deviation), with a total ozone formation potential (TOFP) of 87.3 ± 58.7 ppb. Aldehydes contributed the most to the concentration and TOFP of OVOCs, followed by ketones, alcohols, and carboxylic acids. Formaldehyde, acetone, and acetaldehyde were the three most abundant atmospheric carbonyls. An optimized photochemical age-based parameterization method was locally applied for the source apportionment of OVOCs. OVOCs in Shenzhen primarily originated from biogenic sources during the summer. Secondary anthropogenic sources were also important contributors of most carbonyl compounds. The campaign was divided into four periods. Two periods were dominated by the east wind from the relatively clean coastal areas, with the mean concentration of anthropogenic OVOCs largely decreasing during the Chinese National Day holidays. The other two periods were dominated by northwest wind and northeast wind, respectively, with larger OVOC contributions from anthropogenic sources, suggesting that pollution transport from the inland was a main contributor to OVOCs. This study highlights the important contributions of both local and regional OVOC sources in urban atmospheres.
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Affiliation(s)
- Zhi-Jie Li
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Hao-Nan Ma
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xing Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Meng-Xue Tang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Ke Du
- Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Canada
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
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Yu T, Zhang H, Yan YM, Liu YN, Huang XF, Qiao S, Yang Q, Li P, Jiang RC, Ma DC. Correlation of idiopathic benign paroxysmal positional vertigo with cerebral small vessel disease. Am J Emerg Med 2023; 74:140-145. [PMID: 37837822 DOI: 10.1016/j.ajem.2023.09.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/24/2023] [Accepted: 09/17/2023] [Indexed: 10/16/2023] Open
Abstract
BACKGROUND Benign paroxysmal positional vertigo (BPPV) is the most prevalent form of peripheral vertigo, with vascular lesions being one of its suspected causes. The older adults are particularly vulnerable to BPPV. Cerebral small vessel disease (CSVD), on the other hand, is a clinical condition that results from damage of cerebral small vessels. Vascular involvement resulting from age-related risk factors and proinflammatory state may act as the underlying factor linking both BPPV and CSVD. AIM The objective of this study is to explore the potential correlation between BPPV and CSVD by examining whether individuals aged 50 and older with BPPV exhibit a greater burden of CSVD. MATERIALS AND METHODS This retrospective study included patients aged 50 years and older who had been diagnosed with BPPV. A control group consisting of patients diagnosed with idiopathic facial neuritis (IFN) during the same time period was also included. The burden of cerebral white matter hyperintensities (WMHs) was evaluated using the Fazekas scale. An ordinal regression analysis was conducted to investigate the potential correlation between BPPV and WMHs. RESULTS The study included a total of 101 patients diagnosed with BPPV and 116 patients with IFN. Patients with BPPV were found to be significantly more likely (OR = 2.37, 95% CI 1.40-4.03, p = 0.001) to have a higher Fazekas score compared to the control group. Brain infarctions, hypertension, and age were all identified as significant predictors of white matter hyperplasia on MRI, with OR of 9.9 (95% CI 4.21-24.84, P<0.001), 2.86 (95% CI 1.67-5.0, P<0.001), and 1.18 (95% CI 1.13-1.22, P<0.001) respectively. CONCLUSION Our findings suggest that vascular impairment caused by age-related risk factors and proinflammatory status may be contributing factors to the development of BPPV in individuals aged 50 and above, as we observed a correlation between the suffering of BPPV and the severity of WMHs.
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Affiliation(s)
- Ting Yu
- The First School of Clinical Medicine, Shaanxi University of Chinese Medicine, China; Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Hui Zhang
- The First School of Clinical Medicine, Shaanxi University of Chinese Medicine, China; Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Yong-Mei Yan
- The First School of Clinical Medicine, Shaanxi University of Chinese Medicine, China; Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Yan-Ni Liu
- Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Xiao-Feng Huang
- Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Sen Qiao
- The First School of Clinical Medicine, Shaanxi University of Chinese Medicine, China; Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Qi Yang
- Department of Radiology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Peng Li
- Department of Radiology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China
| | - Ruo-Chen Jiang
- The First School of Clinical Medicine, Shaanxi University of Chinese Medicine, China
| | - Dai-Chao Ma
- The First School of Clinical Medicine, Shaanxi University of Chinese Medicine, China; Department of Neurology, Affiliated Hospital of Shaanxi University of Chinese Medicine, China.
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Huang XF, Hao XQ, Yin XX, Ren L, Wang D, Jin F, Tan LN, Liang ZH, Song CL. Functional connectivity alterations in the frontoparietal network and sensorimotor network are associated with behavioral heterogeneity in blepharospasm. Front Neurol 2023; 14:1273935. [PMID: 38020657 PMCID: PMC10668333 DOI: 10.3389/fneur.2023.1273935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/25/2023] [Indexed: 12/01/2023] Open
Abstract
Objective Primary blepharospasm (BSP) is a clinically heterogeneous disease that manifests not only as spasmodic closure of the eyelids but also sometimes with apraxia of eyelid opening (AEO). This cross-sectional study aimed to investigate differences in the neural mechanisms of isolated BSP and BSP-associated AEO subtypes, which may reveal the pathophysiology underlying different phenotypes. Methods A total of 29 patients manifested as isolated BSP, 17 patients manifested as BSP associated with AEO, and 28 healthy controls underwent resting-state functional near-infrared spectroscopy (fNIRS). We assessed functional connectivity (FC) between regions of interest (ROIs) in the fronto-parietal control network (PFCN) and sensorimotor network (SMN). We also examined the relationship between altered FC and behavioral data. Results In the FPCN, ROI- analyses showed decreased FC between the left premotor cortex and supramarginal gyrus in the BSP with AEO group compared to the isolated BSP group. In the SMN, both subgroups showed hypoconnectivity of the left premotor cortex with the right primary motor cortex, primary sensory cortex, and somatosensory association cortex. This hypoconnectivity was positively correlated with the total number of botulinum toxin A treatments, which suggests that long-term botulinum toxin A treatment may modulate motor sequence planning and coordination. Conclusion These findings showed different connectivity alterations in neural networks associated with motor and cognitive control among different behavioral phenotypes of BSP. The identification of specific alterations in various networks that correspond to clinical heterogeneity may inform the identification of potential biomarkers for early diagnosis and personalized neuromodulation targets for treating different BSP subphenotypes.
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Affiliation(s)
| | | | | | | | | | | | | | - Zhan-Hua Liang
- Department of Neurology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Chun-Li Song
- Department of Neurology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
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Peng Y, Cao LM, Wei J, Cheng Y, Yu K, Du K, Huang XF. Key drivers to heterogeneity evolution of black carbon-containing particles in real atmosphere. Sci Total Environ 2023; 897:166394. [PMID: 37597544 DOI: 10.1016/j.scitotenv.2023.166394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/27/2023] [Accepted: 08/16/2023] [Indexed: 08/21/2023]
Abstract
The evolution of black carbon (BC) particles during atmospheric aging led to the complexity of their environmental and climate effect assessment. This study simultaneously measured the heterogeneous distribution of multi-level microphysical properties of BC-containing particles (i.e., BC mass concentration, coating amounts, and morphology) by a suite of state-of-the-art instruments, and investigated how atmospheric processing influence these heterogeneities. Our field measurements show that the mixing states of atmospheric BC-containing particles exhibit a clear dependence on BC core diameters. The particles with small BC core sizes (80-160 nm) are coated and reshaped more rapidly in real atmosphere, with coating-to-BC mass ratios (MR) and non-spherical fractions of 5.1 ± 1.2 and 61 ± 19 %, respectively. Conversely, the particles with large core sizes (240-320 nm) are thinly coated and fractal, with MR and non-spherical fractions of 4.0 ± 0.3 and 74 ± 15 %, respectively. Furthermore, primary emissions result in low heterogeneity in coating amount but great heterogeneity in morphology between BC-containing particles of different sizes, while photochemical processing would enhance heterogeneity in coating amount but weaken the heterogeneity in morphology. Overall, our field measurement of multi-level microphysical properties highlights that BC core size and atmospheric processing are the key factors that drive the heterogeneity evolution of BC-containing particles in real atmosphere.
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Affiliation(s)
- Yan Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Shenzhen 518057, China
| | - Jing Wei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yong Cheng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Kuangyou Yu
- Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Shenzhen 518057, China; Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Canada.
| | - Ke Du
- Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Canada
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
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Liu JN, He YX, Jia XT, Huang R, Zeng N, Fan XC, Huang XF. Feasibility of mini-implant insertion between mesial and distal buccal roots of a maxillary first molar: A cone-beam computed tomography imaging study. Am J Orthod Dentofacial Orthop 2023; 164:665-673. [PMID: 37318427 DOI: 10.1016/j.ajodo.2023.03.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 03/01/2023] [Accepted: 03/01/2023] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Mini-implant insertion in the maxillary posterior region can be influenced by anatomic limitations, thus increasing the failure rate. We explored the feasibility of a new implantation site: the region between the mesial and distal buccal roots of the maxillary first molar. METHODS Cone-beam computed tomography data from 177 patients were collected from a database. The maxillary first molars were morphologically classified by analyzing the angle and morphology of the mesial and distal buccal roots. Next, 77 subjects were randomly selected from the 177 patients to measure and analyze the hard-tissue morphology in the maxillary posterior region. RESULTS We devised the Morphological Classification on the Mesial and Distal Buccal Roots of Maxillary First Molar (MCBRMM), divided into 3 types: MCBRMM-I, II, and III. In all subjects, MCBRMM-I, II, and III accounted for 43%, 25%, and 32%, respectively. At 8 mm from the mesial cementoenamel junction of maxillary first molars, the interradicular distance between the maxillary first molar's mesiodistal buccal roots of MCBRMM-I was 2.6 mm, showing an upward trend from the cementoenamel junction to the apex. The distance from the buccal bone cortex to the palatal root was >9 mm. The buccal cortical thickness was >1 mm. CONCLUSIONS This study provided a potential site for mini-implant insertion in the maxillary posterior region: the alveolar bone of maxillary first molars in MCBRMM-I.
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Affiliation(s)
- Ji-Nan Liu
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yin-Xue He
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xue-Ting Jia
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Rui Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Na Zeng
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China; School of Public Health, Peking University, Beijing, China
| | - Xiao-Chuan Fan
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Feng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
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Su S, Liu YM, Zhan LP, Gao SY, He C, Zhang Q, Huang XF. Evaluation of the accuracy of cone-beam computed tomography image segmentation of isolated tooth roots based on the dynamic threshold method. BMC Oral Health 2023; 23:752. [PMID: 37833773 PMCID: PMC10571368 DOI: 10.1186/s12903-023-03423-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/18/2023] [Indexed: 10/15/2023] Open
Abstract
OBJECTIVE Accurate quantification of the root surface area (RSA) plays a decisive role in the advancement of periodontal, orthodontic, and restorative treatment modalities. In this study, we aimed to develop a dynamic threshold-based computer-aided system for segmentation and calculation of the RSA of isolated teeth on cone-beam computed tomography (CBCT) and to assess the accuracy of the measured data. METHOD We selected 24 teeth to be extracted, including single-rooted and multi-rooted teeth, from 22 patients who required tooth extraction. In the experimental group, we scanned 24 isolated teeth using CBCT with a voxel size of 0.3 mm. We designed a computer-aided system based on a personalized dynamic threshold algorithm to automatically segment the roots of 24 isolated teeth in CBCT images and calculate the RSA. In the control group, we employed digital intraoral scanner devices to perform optical scanning on 24 isolated teeth and subsequently manually segmented the roots using 3-matic software to calculate the RSA. We used the paired t-test (P < 0.05) and Bland-Altman plots to analyze the consistency of the two measurement methods. RESULTS The results of the paired t-test showed that there was no significant difference in the RSAs obtained using the dynamic threshold method and the optical scanning image reconstruction (t = 1.005, P = 0.325 > 0.05). As per the Bland-Altman plot, the results were evenly distributed within the region of ± 1.96 standard deviations of the mean, with no increasing or decreasing trends and good consistency. CONCLUSION In this study, we designed a computer-aided root segmentation system based on a personalized dynamic threshold algorithm to automatically segment the roots of isolated teeth in CBCT images with a voxel size of 0.3 mm. We found that the RSA calculated using this approach was highly accurate, and a voxel of 0.3 mm in size could accurately display the surface area data in CBCT images. Overall, our findings in this study provide a foundation for future work on accurate automatic segmentation of tooth roots in full-mouth CBCT images and the computation of RSA.
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Affiliation(s)
- Sha Su
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, 95 Yong 'an Road, Xicheng District, Beijing, 100050, China
| | - Yu-Meng Liu
- Department of General surgery, Beijing Huaxin Hospital, the First Affiliated Hospital of Tsinghua University, Beijing, 100016, China
| | - Li-Ping Zhan
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, 95 Yong 'an Road, Xicheng District, Beijing, 100050, China
| | - Si-Yuan Gao
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, 95 Yong 'an Road, Xicheng District, Beijing, 100050, China
| | - Cai He
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, 95 Yong 'an Road, Xicheng District, Beijing, 100050, China
| | - Qing Zhang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, 95 Yong 'an Road, Xicheng District, Beijing, 100050, China
| | - Xiao-Feng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, 95 Yong 'an Road, Xicheng District, Beijing, 100050, China.
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Huang XF, He Q, Shi HH, Hu HP, Lu L, Huang RM, Zhang XY, Xu YQ. [Mediating effects of obesity and metabolic factors in hyperuricemia and prehypertension]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:1599-1603. [PMID: 37875447 DOI: 10.3760/cma.j.cn112338-20230314-00145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Objective: To assess the mediating effects of obesity and metabolic factors in the relationship between hyperuricemia (HUA) and prehypertension. Methods: A total of 9 399 individuals were selected using a multistage stratified whole-group random sampling method from 90 villages (neighborhood committees) in 30 towns (streets) of 5 districts (counties) in Fuzhou. A total of 4 754 study subjects were included. A linear regression model was used to analyze the association of HUA with obesity and metabolic factors. Single-factor and multi-factor logistic regression models were used to analyze the association of HUA, obesity, and metabolic factors with prehypertension. Mediating effects models were used to analyze the mediating effects of obesity and metabolic factors on the association between HUA and prehypertension. Results: After adjusting for confounders, the association between HUA and cholesterol, triglycerides, HDL-C, LDL-C, BMI, waist circumference, creatinine, and urea nitrogen were significantly correlated (P<0.001). HUA, waist circumference, BMI, and triglycerides were significantly associated with prehypertension (P<0.001). Waist circumference, BMI, and triglycerides mediated the relationship between HUA and prehypertension, with OR (95%CI) of 1.018 (1.007-1.027), 1.010 (1.002-1.018), and 1.010 (1.003-1.017) (P<0.001), with mediating proportions of 7.76%, 4.31%, and 4.31% respectively. No mediating effect of cholesterol, HDL-C, LDL-C, creatinine, and urea nitrogen was found on the relationship (P>0.05). Conclusions: Waist circumference, BMI, and triglycerides all had mediating effects in the association between HUA and prehypertension. For the general population, weight control, waist circumference, and a high-fat diet should be used to reduce the occurrence of prehypertension.
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Affiliation(s)
- X F Huang
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China School of Public Health, Fujian Medical University, Fuzhou 350004, China
| | - Q He
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China School of Public Health, Fujian Medical University, Fuzhou 350004, China
| | - H H Shi
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China School of Public Health, Fujian Medical University, Fuzhou 350004, China
| | - H P Hu
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China School of Public Health, Fujian Medical University, Fuzhou 350004, China
| | - L Lu
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China
| | - R M Huang
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China
| | - X Y Zhang
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China School of Public Health, Fujian Medical University, Fuzhou 350004, China
| | - Y Q Xu
- Fuzhou Center for Disease Control and Prevention, Fujian Medical University, Fuzhou 350004, China School of Public Health, Fujian Medical University, Fuzhou 350004, China
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Xia SY, Huang XF, Li ZJ, Fu N, Jiang Z, Cao LM, Zeng LW, Yu GH. Seasonal variation characteristics of atmospheric peroxyacetyl nitrate (PAN) and its source apportionment in a megacity in southern China. Sci Total Environ 2023:164662. [PMID: 37277044 DOI: 10.1016/j.scitotenv.2023.164662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/28/2023] [Accepted: 06/02/2023] [Indexed: 06/07/2023]
Abstract
Owing to its biotoxicity and inductive effect on photochemical pollution, atmospheric peroxyacetyl nitrate (PAN), which is a typical product of atmospheric photochemical reactions, has attracted much research attention. However, to the best of our knowledge, few comprehensive studies have been conducted on the seasonal variation and key influencing factors of PAN concentrations in southern China. In this study, PAN, ozone (O3), precursor volatile organic compound (VOC), and other pollutant concentrations were measured online for 1 year (from October 2021 to September 2022) in Shenzhen, a megacity in the Greater Bay Area of China. The average concentrations of PAN and peroxypropionyl nitrate (PPN) were 0.54 and 0.08 parts per billion (ppb), and the maximum hourly concentrations reached 10.32 and 1.01 ppb, respectively. The results of the generalized additive model (GAM) showed that the atmospheric oxidation capacity and precursor concentration were the most important factors affecting the PAN concentration. According to the steady-state model, the average cumulative contribution to the peroxyacetyl (PA) radical formation rate by six major carbonyl compounds was calculated at 4.2 × 106 molecules cm-3 s-1, and acetaldehyde (63.0 %) and acetone (13.9 %) contributed the most. Furthermore, the photochemical-age-based parameterization method was used to analyze the source contributions of carbonyl compounds and PA radicals. The results showed that although the primary anthropogenic (40.2 %), biogenic (27.8 %), and secondary anthropogenic (16.4 %) sources were the most important contributors of PA radicals, the biogenic and secondary anthropogenic source contributions both increased considerably in summer, and the cumulative proportion of both sources reached ~70 % in July. In addition, a comparison of PAN pollution processes in different seasons revealed that in summer and winter, the PAN concentration was predominantly limited by precursors and meteorological parameters, such as light intensity, respectively.
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Affiliation(s)
- Shi-Yong Xia
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
| | - Zhi-Jie Li
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Nan Fu
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhen Jiang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Shenzhen 518057, China
| | - Le-Wei Zeng
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Guang-He Yu
- Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Shenzhen 518057, China.
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Wei J, Huang XF, Peng Y, Lin XY, Lei ZH, Cao LM, Zhu WF, Guo S, He LY. Evolution characteristic of atmospheric black carbon particles at a coastal site in the Pearl River Delta, China. Environ Pollut 2023; 324:121380. [PMID: 36863439 DOI: 10.1016/j.envpol.2023.121380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
The mixing of black carbon (BC) with secondary materials is a major uncertainty source in assessing its radiative forcing. However, current understanding of the formation and evolution of various BC components is limited, particularly in the Pearl River Delta, China. This study measured submicron BC-associated nonrefractory materials and the total submicron nonrefractory materials using a soot particle aerosol mass spectrometer and a high-resolution time-of-flight aerosol mass spectrometer, respectively, at a coastal site in Shenzhen, China. Two distinct atmospheric conditions were also identified to further explore the distinctive evolution of BC-associated components: polluted period (PP) and clean period (CP). Comparing the components of two particles, we found that more-oxidized organic factor (MO-OOA) prefers to form on BC during PP rather CP. The formation of MO-OOA on BC (MO-OOABC) was affected by both enhanced photochemical processes and nocturnal heterogeneous processes. Enhanced photo-reactivity of BC, photochemistry during the daytime, and heterogeneous reaction at nighttime were potential pathways for MO-OOABC formation during PP. The fresh BC surface was favorable for the formation of MO-OOABC. Our study shows the evolution of BC-associated components under different atmospheric conditions, which should be considered in regional climate models to improve the assessment of the climate effects of BC.
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Affiliation(s)
- Jing Wei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Yan Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Yu Lin
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Zhen-Hua Lei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Wen-Fei Zhu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Song Guo
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
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Huang XF, Xue JJ, Liu ZL, Chen Y, Luo Y, Wu JB, Wang BW, Wang QG, Wang C. Effects of drinking water temperature in winter on growth performance, water consumption, surface temperature, and intestinal development of geese from 21 to 49 days of age. Poult Sci 2023; 102:102725. [PMID: 37156075 DOI: 10.1016/j.psj.2023.102725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 05/10/2023] Open
Abstract
This research aimed to investigate the effects of drinking water temperatures on growth performance, water consumption, surface temperature, organ indices, blood parameters, and intestinal development of geese, and determine the optimal drinking water temperature for 21 to 49-d geese. A total of 192 twenty-one-day male Yuzhou white geese were allocated randomly to 4 groups with 8 replicate pens per group according to the drinking water temperature (drinking water temperature [7℃-12℃] at ambient temperature [TC], 18℃ [T1], 27℃ [T2], and 36℃ [T3], respectively). The results showed that increasing drinking water temperature did not significantly improve the BW, ADG, and ADFI of geese (P > 0.05), whereas drinking warm water of 36℃ for geese had a trend to increase FCR (0.05 < P < 0.1). Geese in group T2 drank the most water per day on average, whereas geese in group TC drank the least (P < 0.001). Geese in groups T1, T2, and T3 had higher eyes temperatures than group TC (P < 0.001). No significant differences were found on the organ indices and blood biochemical parameters (P > 0.05). Geese from group T1 had higher crypt depth and muscularis thickness of duodenum (P < 0.05), and lower ratio of villus height to crypt depth than other groups (P < 0.001). Geese from group T1 had higher activities of trypsin in duodenum and jejuna and amylase in jejuna at 49 d than other groups (P < 0.01). Overall, these data indicate drinking water at 18℃ can increase water consumption and eyes temperature, and improve the activity of digestive enzymes and promote intestinal development. Under our experimental conditions, we recommend that the optimal drinking water temperature for geese from 21 to 49 d of age is 18°C.
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Affiliation(s)
- X F Huang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - J J Xue
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Z L Liu
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Y Chen
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Y Luo
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - J B Wu
- Agricultural Service Center of Baitao Street, Fuling District, Chongqing 408000, China
| | - B W Wang
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Q G Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China; Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - C Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Chongqing 402460, China; Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China.
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Huang R, He YX, Jia XT, Liu JN, Fan XC, Zeng N, Huang XF. Investigation of periodontal status and bacterial composition aroundmini-implants. Am J Orthod Dentofacial Orthop 2023:S0889-5406(23)00070-7. [PMID: 36858877 DOI: 10.1016/j.ajodo.2022.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 11/01/2022] [Accepted: 11/01/2022] [Indexed: 03/02/2023]
Abstract
INTRODUCTION Mini-implants are now widely used in orthodontic treatment. Soft-tissue inflammation around the mini-implant is an important factor affecting its stability. This study aimed to investigate the periodontal status and the bacterial composition around mini-implants. METHODS A total of 79 mini-implants in 40 patients (aged 18-45 years) were evaluated in this study. The mini-implant probing depth (mPD), mini-implant gingival sulcus bleeding index (mBI), mini-implant plaque index (mPLI), and the composition of the supragingival and subgingival plaque around the mini-implants were recorded. After Congo red staining, the bacteria were classified and counted under a light microscope. RESULTS The mPLI and mBI around mini-implants in the infrazygomatic crest were higher than those in the buccal shelf and interradicular area. The mPD was higher on the coronal site of the mini-implant than on the mesial, distal, and apical sites in the infrazygomatic crest. The mPLI around the mini-implant was positively correlated with the mBI, and the mBI was positively correlated with the mPD. The supragingival and subgingival bacterial composition around the mini-implants was similar to that of natural teeth. Compared with supragingival bacterial composition, the subgingival bacteria of mini-implants had a significantly lower proportion of cocci and a higher proportion of bacilli and spirochetes. CONCLUSIONS The bacteria composition of the plaque and the location are important factors in the inflammation around mini-implants. Similar to natural teeth, mini-implants require health maintenance to prevent inflammation of the surrounding soft tissue and maintain stability.
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Affiliation(s)
- Rui Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yin-Xue He
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xue-Ting Jia
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Ji-Nan Liu
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiao-Chuan Fan
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Na Zeng
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, and School of Public Health, Peking University, Beijing, China
| | - Xiao-Feng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
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21
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Wei J, Niu YB, Tang MX, Peng Y, Cao LM, He LY, Huang XF. Characterizing formation mechanisms of secondary aerosols on black carbon in a megacity in South China. Sci Total Environ 2023; 859:160290. [PMID: 36410489 DOI: 10.1016/j.scitotenv.2022.160290] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/12/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Refractory black carbon (rBC) aerosols emitted from incomplete combustion are important climate forcers. Understanding the chemical characteristics and evolution of rBC-related components is particularly crucial to assess rBC environmental impacts. Here, we explored the chemical components of rBC in Shenzhen, China, using a soot-particle aerosol mass spectrometer (SP-AMS). The observations showed that the rBC coating was mainly composed of secondary aerosols with an average mass contribution of 84.7 %. Among them, secondary organic coating occupied ∼57.7 % of the total coating mass. Exploration of the relationship between secondary organic aerosol (SOA) coating and Ox (=NO2 + O3, an indicator of the extent of photochemical processing) showed that SOA coating was generated mainly through photochemical oxidation during the day. Similarly, sulfate coating, with a small mass fraction of 0.9 %, was also dominated by photochemical oxidation. In contrast, nitrate coating responded positively to ambient relative humidity, especially at night, indicating that it was driven by heterogeneous reactions. In addition, the increased ratio of nitrate on rBC to bulk nitrate at night suggested that black carbon surface could facilitate nocturnal nitrate formation.
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Affiliation(s)
- Jing Wei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ying-Bo Niu
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Meng-Xue Tang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yan Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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22
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Cheng Y, Huang XF, Peng Y, Tang MX, Zhu B, Xia SY, He LY. A novel machine learning method for evaluating the impact of emission sources on ozone formation. Environ Pollut 2023; 316:120685. [PMID: 36400136 DOI: 10.1016/j.envpol.2022.120685] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/06/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Ambient ozone air pollution is one of the most important environmental challenges in China today, and it is particularly significant to identify pollution sources and formulate control strategies. In present study, we proposed a novel method of positive matrix factorization-SHapley Additive explanation (PMF-SHAP) for evaluating the impact of emission sources on ozone formation, which can quantify the main emission sources of ozone pollution. In this method, we first used the PMF model to identify the source of volatile organic compounds (VOCs), and then quantified various emission sources using a combination of machine learning (ML) models and the SHAP algorithm. The R2 of the optimal ML model in this method was as high as 0.96, indicating that the prediction performance was excellent. Furthermore, we explored the impact of different emission sources on ozone formation, and found that ozone formation in Shenzhen was more affected by VOCs, of which vehicle emission sources may have the greatest impact. Our results suggest that the appropriate combination of traditional models with ML models can well address environmental pollution problems. Moreover, the conclusions obtained based on the PMF-SHAP method were different from the traditional ozone formation potential (OFP) results, providing valuable clues for related mechanism studies.
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Affiliation(s)
- Yong Cheng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Yan Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Meng-Xue Tang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Bo Zhu
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Shi-Yong Xia
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
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Feng XX, Huang XF, Huang YN, Liu ZX, Li RK, Zhou JY, Guo W, Chen XY, Tian DK. Begoniaparvibracteata, a new species in Begonia sect. Platycentrum (Begoniaceae) from Guangxi of China, based on morphological and molecular evidence. PhytoKeys 2022; 214:27-38. [PMID: 36760548 PMCID: PMC9836518 DOI: 10.3897/phytokeys.214.90004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 10/11/2022] [Indexed: 06/18/2023]
Abstract
The previously reported begonias in a limestone forest of Guangxi mainly belong to Begoniasect.Coelocentrum Irmscher. In this article, we described and illustrated a new species in sect. Platycentrum (Klotzsch) A.DC., Begoniaparvibracteata X.X.Feng, R.K.Li & Z.X.Liu, which was discovered in a karst forest of south-western Guangxi. The begonia shows high morphological similarity to B.subhowii S.H. Huang and B.psilophylla Irmscher, but differs from the latter two in its narrower oblique-ovate asymmetric leaf blade, 4 (occasionally 6) tepals of pistillate flower and smaller membranous inflorescence bracts. Molecular phylogenetic analysis, based on ITS sequence data, supports the new species as monophyletic and distinct from B.subhowii and B.psilophylla. Considering its narrow distribution and the disturbance of human activities, the conservation status of new taxon is evaluated as "Vulnerable" (VU B1, B2 ab (i, iv, v), D2) according to the IUCN Red List Categories and Criteria.
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Affiliation(s)
- Xin-Xin Feng
- Dongguan Botanical Garden, Dongguan 523086, ChinaDongguan Botanical GardenDongguanChina
| | - Xiao-Feng Huang
- Dongguan Botanical Garden, Dongguan 523086, ChinaDongguan Botanical GardenDongguanChina
| | - Yu-Ni Huang
- Dongguan Botanical Garden, Dongguan 523086, ChinaDongguan Botanical GardenDongguanChina
| | - Zhi-Xian Liu
- Dongguan Botanical Garden, Dongguan 523086, ChinaDongguan Botanical GardenDongguanChina
| | - Ren-Kun Li
- Enshi Dongsheng Plant Development Co. Ltd., Enshi 445000, ChinaEnshi Dongsheng Plant Development Co. Ltd.EnshiChina
| | - Jin-Ye Zhou
- Flower Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, ChinaFlower Research Institute, Guangxi Academy of Agricultural SciencesNanningChina
| | - Wei Guo
- Department of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, ChinaZhongkai University of Agriculture and EngineeringGuangzhouChina
| | - Xiao-Yan Chen
- Guangdong Joco Eco-Environment Co., Ltd, Dongguan 523012, Guangdong, ChinaGuangdong Joco Eco-Environment Co., LtdDongguanChina
| | - Dai-Ke Tian
- Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, 3888 Chenhua Road, Songjiang, Shanghai 201602, ChinaShanghai Chenshan Plant Science Research Center, Chinese Academy of SciencesShanghaiChina
- Shanghai Key Laboratory for Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, 3888 Chenhua Road, Songjiang, Shanghai 201602, ChinaShanghai Key Laboratory for Plant Functional Genomics and Resources, Shanghai Chenshan Botanical GardenShanghaiChina
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Li HL, Zhang L, Xia S, Chen S, Yang Y, Ye CJ, Huang XF. [Clinical pathologic analysis and review of literature on 11 cases of calcifying epithelial odontogenic tumor]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:1119-1127. [PMID: 36379890 DOI: 10.3760/cma.j.cn112144-20220730-00422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Objective: To improve the understanding of histological variants of calcifying epithelial odontogenic tumor (CEOT). Methods: In this retrospective study, 11 cases of CEOT diagnosed from January 2008 to March 2022 were enrolled in the Department of Oral Pathology of Nanjing Stomatological Hospital, Medical School of Nanjing University. Among them, 10 were male and 1 was female. The patients were 19 to 58 years old [(43.0±11.9) years] and the course of disease was 2 weeks to 5 years. The clinicopathological characteristics were analyzed and the follow-up of patients ranged from 1 to 8 years, including 8 cases with follow-up data and 3 cases lost to follow-up. Furthermore, the related domestic and international literature was reviewed. Results: Eleven cases of CEOT included 6 cases of classic CEOT, 2 cases of clear cell CEOT, 2 cases of Langerhans cell-rich variant of CEOT and 1 case of non-calcified CEOT. In 6 cases of classic CEOT, the ratio of occurrence in mandible to maxilla was 2∶1, the ratio in central parts to peripheral parts was 5∶1, 2 cases were associated with unerupted teeth and 3 cases showed local aggressiveness. Histopathologically, classic CEOT showed eosinophilic epithelial cells, amyloid and calcification with Ki-67 value<5%. Among 4 cases with follow-up information, 1 case recurred after 1 year and 3 cases did not recur for 3 to 8 years. In 2 cases of clear cell CEOT, they both occurred in the periphery of mandible, pathologically showing a mix of lamellar balloon-like clear cells and typical CEOT, positive for CK5/6 and p63 in the area where the epithelial cells and clear cells were located, scattered positive for periodic acid-Schiff (PAS) in clear cells, which indicated the presence of glycogen. The maximum Ki-67 value was 5% in this type. One case lost to follow-up and the other case did not recur for 1 year follow-up after surgery. In 2 cases of Langerhans cell-rich variant of CEOT, they were cystic solid lesions and both occurred in the anterior maxilla. Langerhans cells were scattered in the epithelium and non-calcified amyloid glomeruli were present. Two cases were followed up for 1 year and 2 years without recurrence after surgery. One case of non-calcified CEOT that occurs within the jan showed invasion of surrounding soft tissues and the highest of Ki-67 value at 8% in all 11 cases without recurrence at 1 year follow-up. Conclusions: The histological pattern of classic CEOT is unique, and it is necessary to prompt the understanding of several histological variants derived from it.
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Affiliation(s)
- H L Li
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - L Zhang
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - S Xia
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - S Chen
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Y Yang
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - C J Ye
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - X F Huang
- Department of Oral Pathology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
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Huang XF, Xue JJ, Liu ZL, Chen Y, Luo Y, Wang QG, Wang C. Effects of feed trough positioning height on growth performance, feed loss, feeding environment, and behavior of geese. Poult Sci 2022; 101:102179. [PMID: 36215741 PMCID: PMC9554824 DOI: 10.1016/j.psj.2022.102179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/02/2022] [Accepted: 09/07/2022] [Indexed: 11/17/2022] Open
Abstract
In the traditional feeding pattern of geese, the feed trough will be placed on the ground for a long time and hurts the living environment. This research aimed to investigate the effect of 4 different feed trough positioning heights on growth performance, blood parameters, feed loss, water consumption, feeding environment, and behavior of geese and determine the optimal trough positioning height for 28 to 70-d geese. A total of one hundred ninty-two 28-d male Yuzhou white geese were allocated randomly to 4 groups with 6 replicate pens per group according to the trough positioning height (on the ground [D], one-third [L], two-thirds [M], and the same height of geese's beak above the ground [H], respectively). The results show that the growth performance and blood biochemical parameters have no significant difference among groups (P > 0.05). The average daily feed loss and water consumption presented the lowest value in group H (P < 0.01). The hygienic condition index of the feed and feed trough increased as trough positioning height. Feed from group H had a higher cleanliness score than other groups (P < 0.001). The count of microbes (total bacteria, Staphylococcus aureus, and Escherichia coli) on the surface of the feed trough from group H was lower than other groups (P < 0.001). Geese from group H had shorter daily feeding and drinking time than other groups (P < 0.05). Overall, these data indicate the same trough positioning height with geese's beaks could lower feed loss, and water consumption and improve hygienic conditions without damage to growth performance and will be the optimal choice for geese.
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Affiliation(s)
- X F Huang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China
| | - J J Xue
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China
| | - Z L Liu
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China
| | - Y Chen
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China
| | - Y Luo
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China
| | - Q G Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China; Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - C Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, China; Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China.
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Li L, Chen XJ, Cui MH, Feng LM, Fu C, Gu J, Ha CF, Huang XF, Lu Q, Ma XX, Shen DH, Tian QJ, Wang G, Wang SX, Wu LY, Xie MQ, Yang X, Zhang SL, Zhou XR, Zhu L. [Chinese guideline on the management of endometrial hyperplasia]. Zhonghua Fu Chan Ke Za Zhi 2022; 57:566-574. [PMID: 36008282 DOI: 10.3760/cma.j.cn112141-20220628-00418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
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Tong JL, Feng LM, Xue FX, Shen DH, Hao M, Guo RX, Huang XF, Deng S, Xu DB, Song JD, Wang G, Zhu L, Chen YQ, Feng Y, Lang JH, Zhu L. [Clinical pathway for diagnosis and management of endometrial polyps]. Zhonghua Fu Chan Ke Za Zhi 2022; 57:491-495. [PMID: 35902782 DOI: 10.3760/cma.j.cn112141-20220422-00269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
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Yan RH, Peng X, Lin W, He LY, Wei FH, Tang MX, Huang XF. Trends and Challenges Regarding the Source-Specific Health Risk of PM 2.5-Bound Metals in a Chinese Megacity from 2014 to 2020. Environ Sci Technol 2022; 56:6996-7005. [PMID: 35050611 DOI: 10.1021/acs.est.1c06948] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Identifying the health risk of PM2.5 is essential for urban air pollution control. In 2013, China announced the ever-strict national Air Pollution Prevention and Control Action Plan, and its health benefit should be evaluated to provide reference for future policymaking. In this study, we conducted a seven-year (2014-2020) continuous observation of PM2.5 in Shenzhen, the third largest city in China, which has relatively good air quality. The results showed that the annual mean PM2.5 and total concentration of 21 associated metals dropped from 37.7 to 18.5 μg/m3 and from 2.4 to 1.1 μg/m3, respectively. Combining methods for source apportionment and health risk assessment, we found that the total carcinogenic risk (CR) of five hazardous metals (Cd, Cr, Ni, Co, and Pb) showed a clear decreasing trend. However, the total CR (1.8 × 10-6) in 2020 still exceeded the widely acceptable risk level (i.e., 1 × 10-6), with the primary contributor changing from industrial emissions (61%) to vehicle emissions (63%). Further analysis indicated that the CR of vehicles mainly came from Cr and Ni released by braking and tire wearing and has fluctuated in recent years, highlighting a great challenge of controlling nonexhaust emissions of vehicles (including electric cars) in the future.
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Affiliation(s)
- Run-Hua Yan
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xing Peng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Weiwei Lin
- Department of Occupational and Environmental Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Feng-Hua Wei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Meng-Xue Tang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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Shan S, Liu S, Yang ZY, Wang TM, Lin ZT, Feng YL, Pakezhati S, Huang XF, Zhang L, Sun GW. Oral and maxillofacial pain as the first sign of metastasis of an occult primary tumour: A fifteen-year retrospective study. World J Clin Cases 2022; 10:4436-4445. [PMID: 35663053 PMCID: PMC9125288 DOI: 10.12998/wjcc.v10.i14.4436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/05/2022] [Accepted: 03/16/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Metastatic adenocarcinoma of the jaw (MAJ) is a rare disease that accounts for 1%-3% of all oral and maxillofacial malignant tumours. Oral and maxillofacial pain may be the first symptom of metastatic spread of an occult primary tumour. Therefore, early identification of oral and maxillofacial pain by dental professionals is critical.
AIM To explore the clinical and computerized tomography (CT) features of MAJ with oral and maxillofacial pain as the first symptom.
METHODS The medical records of all patients who were treated in our hospital between January 2006 and February 2020, and diagnosed with MAJ with oral and maxillofacial pain as the first symptom, were reviewed retrospectively. Clinical data were collected on age, sex, medical history, clinical manifestations, site of metastasis, and site of the primary lesion. CT features were analysed in detail, and a radiological classification scheme comprising five types: Osteolytic, osteoblastic, mixed, cystic, and alveolar bone resorption was proposed.
RESULTS The primary sites of MAJ were the lungs (n = 6), liver (n = 4), kidneys (n = 2), prostate (n = 1), and gastric cardia (n = 1). Five tumours were classified as the osteolytic type, all with a permeative margin (100%, P < 0.05), and three were classified as the mixed type, mostly with a moth-eaten margin (80%, P < 0.05). The cystic (n = 3) and alveolar bone resorption (n = 1) types had geographic margins, and the osteoblastic type (n = 1) had sclerotic margins. Moreover, nine tumours showed periosteal reaction and five showed a localised soft tissue mass, while the occurrence of jaw expansion was relatively rare.
CONCLUSION MAJ has complex clinical and CT features. Oral and maxillofacial pain may be the first sign of a primary tumour affecting other sites.
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Affiliation(s)
- Shan Shan
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Shu Liu
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Zhen-Yu Yang
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Tie-Mei Wang
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Zi-Tong Lin
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Ying-Lian Feng
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Seyiti Pakezhati
- Department of Dentomaxillofacial Radiology, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Xiao-Feng Huang
- Department of Oral Pathology,The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Lei Zhang
- Department of Oral Pathology,The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Guo-Wen Sun
- Department of Oral and Maxillofacial Surgery, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
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Tang MX, Huang XF, Sun TL, Cheng Y, Luo Y, Chen Z, Lin XY, Cao LM, Zhai YH, He LY. Decisive role of ozone formation control in winter PM 2.5 mitigation in Shenzhen, China. Environ Pollut 2022; 301:119027. [PMID: 35183665 DOI: 10.1016/j.envpol.2022.119027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/26/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
During the COVID-19 lockdown, atmospheric PM2.5 in the Pearl River Delta (PRD) showed the highest reduction in China, but the reasons, being a critical question for future air quality policy design, are not yet clear. In this study, we analyzed the relationships among gaseous precursors, secondary aerosols and atmospheric oxidation capacity in Shenzhen, a megacity in the PRD, during the lockdown period in 2020 and the same period in 2021. The comprehensive observational datasets showed large lockdown declines in all primary and secondary pollutants (including O3). We found that, however, the daytime concentrations of secondary aerosols during the lockdown period and normal period were rather similar when the corresponding odd oxygen (Ox≡O3+NO2, an indicator of photochemical processing avoiding the titration effect of O3 by freshly emitted NO) were at similar levels. Therefore, reduced Ox, rather than the large reduction in precursors, was a direct driver to achieve the decline in secondary aerosols. Moreover, Ox was also found to determine the spatial distribution of intercity PM2.5 levels in winter PRD. Thus, an effective strategy for winter PM2.5 mitigation should emphasize on control of winter O3 formation in the PRD and other regions with similar conditions.
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Affiliation(s)
- Meng-Xue Tang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Tian-Le Sun
- Shenzhen Environmental Monitoring Center, Shenzhen, 518049, China
| | - Yong Cheng
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yao Luo
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Zheng Chen
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Yu Lin
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yu-Hong Zhai
- State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Ecological and Environmental Monitoring Center, Guangzhou, 510308, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
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31
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He DY, Huang XF, Wei J, Wei FH, Zhu B, Cao LM, He LY. Soil dust as a potential bridge from biogenic volatile organic compounds to secondary organic aerosol in a rural environment. Environ Pollut 2022; 298:118840. [PMID: 35026325 DOI: 10.1016/j.envpol.2022.118840] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/06/2022] [Accepted: 01/08/2022] [Indexed: 06/14/2023]
Abstract
The role of coarse particles has recently been proven to be underestimated in the atmosphere and can strongly influence clouds, ecosystems and climate. However, previous studies on atmospheric chemistry of volatile organic compounds (VOCs) have mostly focused on the products in fine particles, it remains less understood how coarse particles promote secondary organic aerosol (SOA) formation. In this study, we investigated water-soluble compounds of size-segregated aerosol samples (0.056 to >18 μm) collected at a coastal rural site in southern China during late summer and found that oxygenated organic matter was abundant in the coarse mode. Comprehensive source apportionment based on mass spectrum and 14C analysis indicated that different from fossil fuel SOA, biogenic SOA existed more in the coarse mode than in the fine mode. The SOA in the coarse mode showed a unique correlation with biogenic VOCs. 13C and elemental composition strongly suggested a pathway of heterogeneous reactions on coarse particles, which had an abundant low-acidic aqueous environment with soil dust to possibly initiate iron-catalytic oxidation reactions to form SOA. This potential pathway might complement understanding of both formation of biogenic SOA and sink of biogenic VOCs in global biogeochemical cycles, warrantying future relevant studies.
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Affiliation(s)
- Dong-Yi He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Feng Huang
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Jing Wei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Feng-Hua Wei
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Bo Zhu
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Li-Ming Cao
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Ling-Yan He
- Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
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32
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Cheng Y, He LY, Huang XF. Development of a high-performance machine learning model to predict ground ozone pollution in typical cities of China. J Environ Manage 2021; 299:113670. [PMID: 34479147 DOI: 10.1016/j.jenvman.2021.113670] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 08/22/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
High ozone concentrations have adverse effects on human health and ecosystems. In recent years, the ambient ozone concentration in China has shown an upward trend, and high-quality prediction of ozone concentrations has become critical to support effective policymaking. In this study, a novel hybrid model combining wavelet decomposition (WD), a gated recurrent unit (GRU) neural network and a support vector regression (SVR) model was developed to predict the daily maximum 8 h ozone. We used the ground ozone observation data in six representative megacities across China from Jan. 1, 2015 to Jun. 15, 2020 for model training, and we used data from Jun. 15 to Dec. 31, 2020 for model testing. The results show that the developed model performs very well for megacities; against observations, the model obtains an average cross-validated R2 (coefficient of determination) ranging from 0.90 for Shanghai to 0.97 for Chengdu in the one-step predictions, thereby indicating that the model outperformed any single algorithm or other hybrid algorithms reported. The developed model can also capture high ozone pollution episodes with an average accuracy of 92% for the next five days in inland cities. This study will be useful for the environmental health community to prevent high ozone exposure more efficiently in megacities in China and shows great potential for accurate ozone prediction using machine learning approaches.
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Affiliation(s)
- Yong Cheng
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Ling-Yan He
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
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33
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Yue Y, Chen H, Wang L, Du XB, Gao XF, Liao J, Zhou R, Chen ZH, Chen YZ, Huang WW, Huang XF, Hu M, Zhao CL, Du CH, Deng LL, Liang X, Liu Z. [Analysis on the imported Coronavirus Disease 2019 related cluster epidemic in rural areas of Chengdu]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:1240-1244. [PMID: 34706511 DOI: 10.3760/cma.j.cn112150-20210421-00396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
An epidemiological investigation was carried out on a local cluster of outbreak caused by imported cases of Coronavirus Disease 2019 (COVID-19) in rural areas of Chengdu in December 2020, to find out the source of infection and the chain of transmission. According to Prevention and Control Protocol for COVID-19 (Version 7), field epidemiological investigation was adopted, combined with big data technology, video image investigation, gene sequencing and other methods to carry out investigation into COVID-19 cases and infections source tracing, analyze the epidemiological association, and map the chain of transmission. From December 7 to 17, 2020, 13 local COVID-19 confirmed cases and 1 asymptomatic case were diagnosed in Chengdu, of which 12 cases (85.71%) had a history of residence and activity in the village courtyard of Taiping (TP), Pidu (P) District, Chengdu. From November 8, 2020 to November 28, 2020, a group of inbound people form Nepal were transferred to the designated entry personnel quarantine hotel of P District which was adjacent to the TP village. During quarantine, there were 5 cases who tested positive for COVID-19. Through gene sequencing alignment, genes of local cases and Nepalese imported cases from the same period are homologous, all belong to the lineage of L2.2.3 (B.1.36 according to Pangolin lineage typing method). According to the results of field epidemiological investigation and gene sequencing analysis, the index case was most likely infected by contact with household waste of quarantine site. Under the situation of normalization prevention and control of COVID-19, sentinel monitoring of fever clinics in primary medical institutions is the key to early detection of the epidemic. The multi-department joint epidemiological investigation and the application of gene technology are the core links of the investigation and traceability of modern infectious diseases. The allocation of public health resources in rural areas needs to be strengthened. We need to improve the capacity for early surveillance and early warning of the epidemic in rural areas.
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Affiliation(s)
- Y Yue
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - H Chen
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - L Wang
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - X B Du
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - X F Gao
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - J Liao
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - R Zhou
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - Z H Chen
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - Y Z Chen
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - W W Huang
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - X F Huang
- Pidu District Center for Disease Control and Prevention, Chengdu 611730, China Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - M Hu
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - C L Zhao
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - C H Du
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - L L Deng
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - X Liang
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
| | - Z Liu
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China Chengdu Workstation for Emerging Infectious Disease Control and Prevention, Chinese Academy of Medical Sciences, Chengdu 610041, China
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Liu ZL, Xue JJ, Huang XF, Chen Y, Wang QG, Zhang S, Wang C. Effect of stocking density on growth performance, feather quality, serum hormone, and intestinal development of geese from 1 to 14 days of age. Poult Sci 2021; 100:101417. [PMID: 34530230 PMCID: PMC8450253 DOI: 10.1016/j.psj.2021.101417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 07/19/2021] [Accepted: 07/29/2021] [Indexed: 11/23/2022] Open
Abstract
This study was conducted to investigate the effect of stocking density on growth performance, feather quality, serum hormone, and intestinal development of geese from 1 to 14 d of age. A total of 450 one-day-old geese were randomly allotted to 45 battery cage (0.65 m × 0.62 m) pens according to 5 stocking densities (15, 20, 25, 30, and 35 birds/m2). The results showed that ADG and ADFI were reduced (P < 0.05) as stocking density increased from 15 to 35 birds/m2, but increasing stocking density did not influence (P > 0.05) feed conversion ratio (FCR) and body measurement traits. High stocking density significantly decreased (P < 0.05) the feather quality of back, thoracoabdominal, wing, and tail. No significant difference (P > 0.05) was found in serum concentration of adrenocorticotrophic hormone, cortisol, corticosterone, triiodothyronine, and thyroxine. The weight of cecum and intestine decreased (P < 0.05) as the stocking density increased. Increasing stocking density decreased (P < 0.05) jejunal villus height and villus height-to-crypt depth ratio, and increased (P < 0.05) jejunal crypt depth and ileal crypt depth in geese. Consequently, the high stocking density could depress the growth and impaired feather quality and intestinal development of geese. Under our experimental conditions, we recommend that the stocking density of geese from 1 to 14 d of age should not more than 20 birds/m2.
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Affiliation(s)
- Z L Liu
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, P. R. China
| | - J J Xue
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, P. R. China
| | - X F Huang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, P. R. China
| | - Y Chen
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, P. R. China
| | - Q G Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, P. R. China; Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, P. R. China
| | - S Zhang
- Kemin (China) Technologies Animal Nutrition and Health. Zhuhai 519040, P. R. China
| | - C Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing 402460, P. R. China; Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, P. R. China.
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Zhu B, Huang XF, Xia SY, Lin LL, Cheng Y, He LY. Biomass-burning emissions could significantly enhance the atmospheric oxidizing capacity in continental air pollution. Environ Pollut 2021; 285:117523. [PMID: 34380222 DOI: 10.1016/j.envpol.2021.117523] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/08/2021] [Accepted: 05/17/2021] [Indexed: 06/13/2023]
Abstract
Volatile organic compounds (VOCs) are important precursors of photochemical pollution. However, a substantial fraction of VOCs, namely, oxygenated VOCs (OVOCs), have not been sufficiently characterized to evaluate their sources in air pollution in China. In this study, a total of 119 VOCs, including 60 OVOCs in particular, were monitored to provide a more comprehensive picture based on different online measurement techniques, proton-transfer-reaction time-of-flight mass spectrometry (PTR-ToF-MS) and online gas chromatography/mass spectrometry (GC/MS), at a receptor site in southeastern China during a photochemically active period. Positive matrix factorization (PMF) and photochemical age-based parameterization were combined to identify and quantify different sources of major VOCs during daytime hours, with the advantage of including VOC decay processes. The results revealed the unexpected role of biomass burning (21%) in terms of ozone (O3) formation potential (OFP) when including the contributions of OVOCs and large contributions (30-32%) of biomass burning to aldehydes, as more OVOCs were measured in this study. We argue that biomass burning could significantly enhance the continental atmospheric oxidizing capacity, in addition to the well-recognized contributions of primary pollutants, which should be seriously considered in photochemical models and air pollution control strategies.
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Affiliation(s)
- Bo Zhu
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Shi-Yong Xia
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Li-Liang Lin
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yong Cheng
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Ling-Yan He
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
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Huang XF, Cao LM, Tian XD, Zhu Q, Saikawa E, Lin LL, Cheng Y, He LY, Hu M, Zhang YH, Lu KD, Liu YH, Daellenbach K, Slowik JG, Tang Q, Zou QL, Sun X, Xu BY, Jiang L, Shen YM, Ng NL, Prévôt ASH. Critical Role of Simultaneous Reduction of Atmospheric Odd Oxygen for Winter Haze Mitigation. Environ Sci Technol 2021; 55:11557-11567. [PMID: 34431667 DOI: 10.1021/acs.est.1c03421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The lockdown due to COVID-19 created a rare opportunity to examine the nonlinear responses of secondary aerosols, which are formed through atmospheric oxidation of gaseous precursors, to intensive precursor emission reductions. Based on unique observational data sets from six supersites in eastern China during 2019-2021, we found that the lockdown caused considerable decreases (32-61%) in different secondary aerosol components in the study region because of similar-degree precursor reductions. However, due to insufficient combustion-related volatile organic compound (VOC) reduction, odd oxygen (Ox = O3 + NO2) concentration, an indicator of the extent of photochemical processing, showed little change and did not promote more decreases in secondary aerosols. We also found that the Chinese provinces and international cities that experienced reduced Ox during the lockdown usually gained a greater simultaneous PM2.5 decrease than other provinces and cities with an increased Ox. Therefore, we argue that strict VOC control in winter, which has been largely ignored so far, is critical in future policies to mitigate winter haze more efficiently by reducing Ox simultaneously.
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Affiliation(s)
- Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Li-Ming Cao
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xu-Dong Tian
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Qiao Zhu
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Department of Environmental Sciences, Emory University, Atlanta, Georgia 30322, United States
| | - Eri Saikawa
- Department of Environmental Sciences, Emory University, Atlanta, Georgia 30322, United States
| | - Li-Liang Lin
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yong Cheng
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ling-Yan He
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Min Hu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Yuan-Hang Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Ke-Ding Lu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Yu-Han Liu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Kaspar Daellenbach
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
| | - Jay G Slowik
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
| | - Qian Tang
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Qiao-Li Zou
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Xin Sun
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Bing-Ye Xu
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Lan Jiang
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Ye-Min Shen
- Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control of Zhejiang, Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
| | - Nga Lee Ng
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - André S H Prévôt
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
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Wang GQ, Huang XF, Wu CH, Shen Y, Cai SL, Fan J, Zhang WG, Zheng SR. A hydrolytically stable hydrogen-bonded inorganic-organic network as a luminescence turn-on sensor for the detection of Bi3+ and Fe3+ cations in water. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Wu ZY, Song ZF, Tong YF, Zhang XJ, Wang YF, Huang XF, Cai XJ. [Clinical analysis of 9 cases of a novel stent assisted intestinal bypass for preventing anastomotic leakage in laparoscopic assisted radical resection of rectal cancer]. Zhonghua Wai Ke Za Zhi 2021; 59:497-501. [PMID: 34102734 DOI: 10.3760/cma.j.cn112139-20210205-00067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To examine the safety and effectiveness of a novel stent assisted intestinal bypass for preventing anastomotic leakage in laparoscopic assisted radical resection of rectal cancer. Methods: The clinical data of 9 patients with rectal cancer who underwent laparoscopic radical resection and stent assisted intestinal bypass from September 2019 to June 2020 at the Department of Anus & Intestine Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University were retrospectively analyzed. There were 6 males and 3 females, aged (62.1±6.8) years (range: 53 to 75 years), underwent laparoscopic assisted radical resection of rectal cancer and stent assisted intestinal bypass. A degradable diverting stent was placed at the end of the ileum, and a drainage tube was placed at the proximal end of the stent to bypass the intestinal contents. After operation, the patients were given a diet with less residue. From the 14th day after operation, abdomen X-ray films were taken every 5 to 7 days to observe the destination of the stent dynamically. When the stent was observed to be disintegrated into pieces, the drainage tube was clamped for 3 days to observe any side effects before the tube was removed. The operation time, the time of removing the bypass tube and the total hospital stay were recorded. Results: Laparoscopic assisted radical resection of rectal cancer and stent assisted intestinal bypass were successfully performed in all patients. The operation time was (230.4±48.0) minutes (range: 150 to 318 minutes), and the time of removing shunt tube was (28.8±4.6) days (range: 22 to 34 days). The duration of hospitalization was (21.0±8.6) days (range: 9 to 34 days). Postoperative pathological examination showed 7 cases of moderately differentiated adenocarcinoma, 1 case of moderately well differentiated adenocarcinoma and 1 case of mucinous adenocarcinoma. There were 2 cases of T1, 4 cases of T2 and 3 cases of T3. The number of lymph node dissection was 13.4±3.5 (range: 6 to 18), 3 cases were positive and 6 cases were negative. The post-operation follow-up time was 6 to 16 months, no anastomotic leakage or stenosis was found. Conclusion: Stent assisted intestinal bypass for the prevention of anastomotic leakage in laparoscopic assisted radical resection of rectal cancer is safe and feasible, and shows good short-term effect.
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Affiliation(s)
- Z Y Wu
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
| | - Z F Song
- Department of Anus & Intestine Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
| | - Y F Tong
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
| | - X J Zhang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
| | - Y F Wang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
| | - X F Huang
- Department of Anus & Intestine Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
| | - X J Cai
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310020, China
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Qin TX, You EM, Zhang MX, Zheng P, Huang XF, Ding SY, Mao BW, Tian ZQ. Quantification of electron accumulation at grain boundaries in perovskite polycrystalline films by correlative infrared-spectroscopic nanoimaging and Kelvin probe force microscopy. Light Sci Appl 2021; 10:84. [PMID: 33859164 PMCID: PMC8050298 DOI: 10.1038/s41377-021-00524-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 05/25/2023]
Abstract
Organic-inorganic halide perovskites are emerging materials for photovoltaic applications with certified power conversion efficiencies (PCEs) over 25%. Generally, the microstructures of the perovskite materials are critical to the performances of PCEs. However, the role of the nanometer-sized grain boundaries (GBs) that universally existing in polycrystalline perovskite films could be benign or detrimental to solar cell performance, still remains controversial. Thus, nanometer-resolved quantification of charge carrier distribution to elucidate the role of GBs is highly desirable. Here, we employ correlative infrared-spectroscopic nanoimaging by the scattering-type scanning near-field optical microscopy with 20 nm spatial resolution and Kelvin probe force microscopy to quantify the density of electrons accumulated at the GBs in perovskite polycrystalline thin films. It is found that the electron accumulations are enhanced at the GBs and the electron density is increased from 6 × 1019 cm-3 in the dark to 8 × 1019 cm-3 under 10 min illumination with 532 nm light. Our results reveal that the electron accumulations are enhanced at the GBs especially under light illumination, featuring downward band bending toward the GBs, which would assist in electron-hole separation and thus be benign to the solar cell performance. Correlative infrared-spectroscopic nanoimaging by the scattering-type scanning near-field optical microscopy and Kelvin probe force microscopy quantitatively reveal the accumulated electrons at GBs in perovskite polycrystalline thin films.
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Affiliation(s)
- Ting-Xiao Qin
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - En-Ming You
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Mao-Xin Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Peng Zheng
- School of Aerospace Engineering, Xiamen University, Xiamen, China
| | - Xiao-Feng Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Song-Yuan Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.
| | - Bing-Wei Mao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.
| | - Zhong-Qun Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
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Fan XC, Ma LS, Chen L, Singh D, Rausch-Fan X, Huang XF. Temporomandibular Joint Osseous Morphology of Class I and Class II Malocclusions in the Normal Skeletal Pattern: A Cone-Beam Computed Tomography Study. Diagnostics (Basel) 2021; 11:diagnostics11030541. [PMID: 33803644 PMCID: PMC8002863 DOI: 10.3390/diagnostics11030541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/07/2021] [Accepted: 03/16/2021] [Indexed: 11/22/2022] Open
Abstract
(1) Background—The aim of the present study was to evaluate the correlation between the temporomandibular joint (TMJ) osseous morphology of normal skeletal pattern individuals with different dental malocclusions by using cone-beam computed tomography (CBCT). (2) Methods—The CBCT images of bilateral TMJs in 67 subjects with skeletal class I and average mandibular angle (26 males and 41 females, age range 20–49 years) were evaluated in this study. The subjects were divided into class I, class II division 1, and class II division 2 according to the molar relationship and retroclination of the maxillary incisors. Angular and linear measurements of TMJ were evaluated and the differences between the groups were statistically analyzed. (3) Results—Intragroup comparisons showed statistical differences for articular eminence inclination, the width of the glenoid fossa, the ratio of the width of the glenoid fossa to the depth of the glenoid fossa, the condylar angle, and the intercondylar angle between the malocclusion groups. The measurements of the glenoid fossa shape showed no significant difference between the left and right sides. Females showed more differences in the morphological parameters of TMJ between the three malocclusion groups than the males. (4) Conclusion—The present study revealed differences in the TMJ osseous morphology between dental class I and class II malocclusions in the normal skeletal pattern.
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Affiliation(s)
- Xiao-Chuan Fan
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; (X.-C.F.); (L.-S.M.)
| | - Lin-Sha Ma
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; (X.-C.F.); (L.-S.M.)
| | - Li Chen
- Department of Orthodontics, Beijing Stomatological Hospital & School of Stomatology, Capital Medical University, Beijing 100050, China;
| | - Diwakar Singh
- Clinical Research Center, Division of Conservative Dentistry and Periodontology, School of Dentistry, Medical University of Vienna, 1090 Vienna, Austria;
| | - Xiaohui Rausch-Fan
- Clinical Research Center, Division of Conservative Dentistry and Periodontology, School of Dentistry, Medical University of Vienna, 1090 Vienna, Austria;
- Correspondence: (X.R.-F.); (X.-F.H.)
| | - Xiao-Feng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; (X.-C.F.); (L.-S.M.)
- Correspondence: (X.R.-F.); (X.-F.H.)
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Zhou XB, Lai LF, Huang XF, Gong FX, Ding C, Wang Y. [Endovascular treatment of 4 cases of severe epistaxis after radiotherapy for nasopharyngeal carcinoma]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:157-160. [PMID: 33548947 DOI: 10.3760/cma.j.cn115330-20200628-00534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- X B Zhou
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - L F Lai
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - X F Huang
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - F X Gong
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - C Ding
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Y Wang
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Xia SY, Wang C, Zhu B, Chen X, Feng N, Yu GH, Huang XF. Long-term observations of oxygenated volatile organic compounds (OVOCs) in an urban atmosphere in southern China, 2014-2019. Environ Pollut 2021; 270:116301. [PMID: 33360596 DOI: 10.1016/j.envpol.2020.116301] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 12/07/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
Oxygenated volatile organic compounds (OVOCs) are important precursors and intermediate products of atmospheric photochemical reactions, which can promote the formation of secondary pollutants such as ozone (O3) and secondary organic aerosol (SOA). However, there have been few studies on the sources of and long-term variation in ambient OVOCs. This study combined sensitive, near real-time measurements of VOCs by proton transfer reaction-mass spectrometry (PTR-MS) with an improved photochemical age parameterization method to quantify daytime sources of OVOCs in an urban atmosphere in China from 2014 to 2019, permitting the observation of the impacts of emission control strategies that were implemented during this period. Temporal variation in six key OVOCs (methanol, acetaldehyde, acetone, methyl ethyl ketone (MEK), formic acid, and acetic acid) were observed. The sum of concentrations of OVOCs was averagely 13% higher during the dry season (November to April), when winds transported polluted air masses to Shenzhen from the continent, than during the wet season, and peak diurnal levels occurred during the daytime year-round due to photochemical production and higher daytime anthropogenic emissions. The average dry season concentration of OVOCs declined from a peak of 30.3 ppb in 2015 to 18.7 ppb in 2019. The results of source apportionment showed that primary anthropogenic sources contributed the most to methanol, MEK, and acetic acid (32-51%); the dominant sources of acetaldehyde and formic acid were both primary and secondary anthropogenic sources; and biomass burning contributed a small fraction (5-11%) to the six OVOCs. From 2014 to 2019, contributions from primary anthropogenic sources of OVOCs decreased significantly by 50-60% due to intensive pollution control measures in Shenzhen, whereas pollution control measures had no observable impact on secondary OVOCs, indicating their formation was not limited by availability of their primary VOC precursors.
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Affiliation(s)
- Shi-Yong Xia
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China
| | - Chuan Wang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China; Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Science and Technology Park, Nanshan District, Shenzhen, 518057, China
| | - Bo Zhu
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China
| | - Xue Chen
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China
| | - Ning Feng
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China
| | - Guang-He Yu
- Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Science and Technology Park, Nanshan District, Shenzhen, 518057, China
| | - Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China.
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Qu K, Wang X, Xiao T, Shen J, Lin T, Chen D, He LY, Huang XF, Zeng L, Lu K, Ou Y, Zhang Y. Cross-regional transport of PM 2.5 nitrate in the Pearl River Delta, China: Contributions and mechanisms. Sci Total Environ 2021; 753:142439. [PMID: 33207477 DOI: 10.1016/j.scitotenv.2020.142439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/12/2020] [Accepted: 09/13/2020] [Indexed: 06/11/2023]
Abstract
Cross-regional transport potentially contributes to PM2.5 nitrate (pNO3), and this can occur as indirect transport, through which pNO3 precursors are transported to targeted regions, wherein they subsequently react with locally emitted ones to produce pNO3. However, the process has been rarely studied, which limits its comprehensive understanding. We applied the CMAQ model to study the contributions and mechanisms of pNO3 transport during autumn in the Pearl River Delta (PRD), a metropolitan region under the growing influence of cross-regional transport on PM2.5 pollution. Results showed that cross-regional transport contributed to 58% pNO3 monthly in the PRD, and this mostly occurred as indirect transport contributions (accounting for 43% among all contributions). For the first time, we identified the mechanism of indirect pNO3 transport in the PRD, which mainly involves transported O3 and locally emitted NOx reacting to produce pNO3 through N2O5 heterogeneous hydrolysis. pNO3 contributions in different periods and regions indicated differences in the indirect transport contributions to N2O5 heterogeneous hydrolysis under varying O3 availability conditions, which are determined by wind fields and the intensity of NOx emissions. On the regional scale, the pNO3 level is controlled by both transported O3 and local NOx emissions, but pNO3 sensitivity to these two precursors varies among cities. This study demonstrates the notable effect and complex process of cross-regional pNO3 transport in the PRD. Considering the important role of transported O3 for pNO3, O3 reduction within a larger scale is required to achieve PM2.5 pollution control target.
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Affiliation(s)
- Kun Qu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China
| | - Xuesong Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China.
| | - Teng Xiao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China
| | - Jin Shen
- State Key Laboratory of Regional Air Quality Monitoring, Guangdong Key Laboratory of Secondary Air Pollution Research, Guangdong Environmental Monitoring Center, Guangzhou 510308, China
| | - Tingkun Lin
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China
| | - Duohong Chen
- State Key Laboratory of Regional Air Quality Monitoring, Guangdong Key Laboratory of Secondary Air Pollution Research, Guangdong Environmental Monitoring Center, Guangzhou 510308, China
| | - Ling-Yan He
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Limin Zeng
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China
| | - Keding Lu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China
| | - Yubo Ou
- State Key Laboratory of Regional Air Quality Monitoring, Guangdong Key Laboratory of Secondary Air Pollution Research, Guangdong Environmental Monitoring Center, Guangzhou 510308, China
| | - Yuanhang Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China; Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China; CAS Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China.
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Wang GQ, Huang JF, Huang XF, Deng SQ, Zheng SR, Cai SL, Fan J, Zhang WG. A hydrolytically stable cage-based metal–organic framework containing two types of building blocks for the adsorption of iodine and dyes. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01257b] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal–organic framework (SCNU-Z4) with high chemical stability in water and common organic solvents showed ability for iodine and dye adsorption.
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Affiliation(s)
- Guang-Qing Wang
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
| | - Jie-Fen Huang
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
| | - Xiao-Feng Huang
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
| | - Shu-Qi Deng
- Institute for Sustainable Energy/College of Sciences
- Shanghai University
- Shanghai
- PR China
| | - Sheng-Run Zheng
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
| | - Song-Liang Cai
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
| | - Jun Fan
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
| | - Wei-Guang Zhang
- School of Chemistry and Environment
- South China Normal University
- Guangzhou
- P. R. China
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Xie KH, Liu LL, Su CY, Huang XF, Wu BX, Liu RN, Li H, Chen QQ, He JS, Ruan YK. Low Antioxidant Status of Serum Uric Acid, Bilirubin, Albumin, and Creatinine in Patients With Benign Paroxysmal Positional Vertigo. Front Neurol 2020; 11:601695. [PMID: 33329359 PMCID: PMC7714964 DOI: 10.3389/fneur.2020.601695] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/12/2020] [Indexed: 12/15/2022] Open
Abstract
Objective: To investigate the roles of serum uric acid (UA), bilirubin (BIL), albumin (ALB), and creatinine (CRE) as major intravascular antioxidants, in benign paroxysmal positional vertigo (BPPV). Methods: The serum levels of UA, BIL, ALB, and CRE were retrospectively analyzed in 70 patients with new-onset idiopathic BPPV and 140 age- and sex-matched healthy controls (HCs). Results: Serum UA, BIL, ALB, and CRE levels were significantly lower in the BPPV group than the HC group. Furthermore, serum levels of BIL and ALB were significantly lower in the BPPV group when compared by sex. Multiple stepwise logistic regression revealed that a reduction in serum ALB was independently related to BPPV (odds ratio = 0.688; 95% confidence interval = 0.607– 0.780). Receiver operating characteristic analyses revealed a cut-off value of 45.15 g/L for ALB with a sensitivity of 74.29% (62.97– 83.07%) and specificity of 73.57% (65.71– 80.18%). Conclusions: Serum levels of UA, BIL, ALB, and CRE were lower in BPPV patients, indicating a lower antioxidant status. Furthermore, a reduction in serum ALB was independently associated with BPPV. These results provide insights into the possible roles of oxidative stress in the pathogenesis of BPPV.
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Affiliation(s)
- Ke-Hang Xie
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Ling-Ling Liu
- Department of Nephrology, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
| | - Chu-Yin Su
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Xiao-Feng Huang
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Bao-Xing Wu
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Run-Ni Liu
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Hua Li
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Qing-Qing Chen
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Jia-Sheng He
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
| | - Yong-Kun Ruan
- Department of Neurology, Zhuhai City Hospital of Integrated Traditional Chinese and Western Medicine, Zhuhai, China
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Ni MF, Wang XM, Wang HY, Chang Y, Huang XF, Zhang BW. Regional cortical thinning and cerebral hypoperfusion in patients with panic disorder. J Affect Disord 2020; 277:138-145. [PMID: 32828000 DOI: 10.1016/j.jad.2020.07.139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 07/28/2020] [Accepted: 07/31/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND Although recent neuroimaging studies have suggested that functional deficits in facial perception are associated with panic disorder (PD), the possibility of cortical thickness and perfusion abnormalities have not been studied in patients with PD. We aimed to investigate alterations in cortical thickness and regional cerebral blood flow (CBF) between PD patients and healthy controls (HCs) using three-dimensional (3D) T1-weighted magnetic resonance imagery (MRI) and 3D arterial spin labeling (ASL) perfusion MRI. METHOD An automated surface-based method (Cat12) measured the cortical thickness of each subject. Z-score normalization for CBF maps was used to generate Z-score maps. Statistical comparisons were performed using statistical parametric mapping with two-sample t-tests. RESULTS Subjects with PD, unlike HCs, displayed cortical thinning in the right fusiform gyrus (FG). Post hoc analysis also revealed a decreased Z-score in the right FG. There was significant positive correlation between the Z-score and the cortical thickness of the right FG. The cortical thickness and Z-score were negatively correlated with the Panic Disorder Severity Scale and Hamilton Rating Scale for Anxiety scores. LIMITATIONS The small sample size may have restricted the identification of additional differences. Other caveats included the use of medication by nine participants. CONCLUSIONS These results provide further evidence of the significant role structural and functional deficits in the right FG play in patients with PD. Due to the observed regional specificity, this finding bears important clinical implications for potential treatment strategies.
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Affiliation(s)
- Ming-Fei Ni
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian 116011, China; Department of Radiology, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Heping District, Shenyang 110004, China
| | - Xiao-Ming Wang
- Department of Radiology, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Heping District, Shenyang 110004, China
| | - Hai-Yang Wang
- Department of Neurology and Psychiatry, First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian 116011, China
| | - Yi Chang
- Department of Neurology and Psychiatry, First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian 116011, China
| | - Xiao-Feng Huang
- Department of Neurology and Psychiatry, First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian 116011, China
| | - Bing-Wei Zhang
- Department of Neurology and Psychiatry, First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian 116011, China; Department of Psychology, Dalian Medical University, No.9, Lvshun South Road, Dalian 116044, China.
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Liu ZL, Xue JJ, Huang XF, Luo Y, Liang MR, Li CJ, Wang QG, Wang C. Effect of feeding frequency on the growth performance, carcass traits, and apparent nutrient digestibility in geese. Poult Sci 2020; 99:4818-4823. [PMID: 32988518 PMCID: PMC7598145 DOI: 10.1016/j.psj.2020.06.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 05/26/2020] [Accepted: 06/13/2020] [Indexed: 12/03/2022] Open
Abstract
This study was conducted to determine the effect of feeding frequency on growth performance, carcass traits, and apparent nutrient digestibility in geese from 28 to 70 D of age. In experiment 1, a total of 240 geese were distributed in a completely randomized design into 4 treatments and 6 replicates of 10 birds each. The treatments were free access to the feeder (ad libitum) and access to the feeder 3, 4, and 5 times daily. Geese fed 3 times daily had a lower (P < 0.05) BW, ADG, and ADFI and a higher (P = 0.064) feed conversion ratio (FCR) from 28 to 41 D of age compared with the other groups. Geese fed 4 times daily had a higher (P < 0.05) ADG and ADFI and a lower (P < 0.05) FCR from 42 to 55 D of age compared with ad libitum fed geese. Geese fed 3 times daily had a higher (P < 0.05) ADG from 56 to 69 D of age than geese fed ad libitum and 4 times daily. No differences (P > 0.05) in BW, ADFI, ADG, and FCR were observed between ad libitum and feeding frequency groups from 28 to 69 D of age. Carcass traits and gastrointestinal development were not affected (P > 0.05) by feeding frequency. In experiment 2, the apparent nutrient digestibility in geese from 71 to 77 D of age fed using different feeding frequencies was determined using the total fecal collection method. Feeding frequency did not affect (P > 0.05) the apparent digestibility of DM, CP, crude ash, calcium, phosphorous, or ether extract in geese. Our study demonstrates for the first time that compensatory growth can be gained by enhancing feed intake when a lower feeding frequency is imposed on geese. Both ad libitum feeding and fixed feeding frequency for 3 to 5 times daily are suitable for geese from 28 to 70 D of age to achieve optimum production.
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Affiliation(s)
- Z L Liu
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - J J Xue
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - X F Huang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - Y Luo
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - M R Liang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - C J Li
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - Q G Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China
| | - C Wang
- Poultry Science Institute, Chongqing Academy of Animal Sciences, Rongchang, Chongqing, China.
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Kang JJ, Fung ML, Zhang K, Lam CS, Wu SX, Huang XF, Yang SJ, Wong-Riley MTT, Liu YY. Chronic intermittent hypoxia alters the dendritic mitochondrial structure and activity in the pre-Bötzinger complex of rats. FASEB J 2020; 34:14588-14601. [PMID: 32910512 DOI: 10.1096/fj.201902141r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 07/21/2020] [Accepted: 08/17/2020] [Indexed: 11/11/2022]
Abstract
Mitochondrial bioenergetics is dynamically coupled with neuronal activities, which are altered by hypoxia-induced respiratory neuroplasticity. Here we report structural features of postsynaptic mitochondria in the pre-Bötzinger complex (pre-BötC) of rats treated with chronic intermittent hypoxia (CIH) simulating a severe condition of obstructive sleep apnea. The subcellular changes in dendritic mitochondria and histochemistry of cytochrome c oxidase (CO) activity were examined in pre-BötC neurons localized by immunoreactivity of neurokinin 1 receptors. Assays of mitochondrial electron transport chain (ETC) complex I, IV, V activities, and membrane potential were performed in the ventrolateral medulla containing the pre-BötC region. We found significant decreases in the mean length and area of dendritic mitochondria in the pre-BötC of CIH rats, when compared to the normoxic control and hypoxic group with daily acute intermittent hypoxia (dAIH) that evokes robust synaptic plasticity. Notably, these morphological alterations were mainly observed in the mitochondria in close proximity to the synapses. In addition, the proportion of mitochondria presented with enlarged compartments and filamentous cytoskeletal elements in the CIH group was less than the control and dAIH groups. Intriguingly, these distinct characteristics of structural adaptability were observed in the mitochondria within spatially restricted dendritic spines. Furthermore, the proportion of moderately to darkly CO-reactive mitochondria was reduced in the CIH group, indicating reduced mitochondrial activity. Consistently, mitochondrial ETC enzyme activities and membrane potential were lowered in the CIH group. These findings suggest that hypoxia-induced respiratory plasticity was characterized by spatially confined mitochondrial alterations within postsynaptic spines in the pre-BötC neurons. In contrast to the robust plasticity evoked by dAIH preconditioning, a severe CIH challenge may weaken the local mitochondrial bioenergetics that the fuel postsynaptic activities of the respiratory motor drive.
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Affiliation(s)
- Jun-Jun Kang
- Department of Neurobiology, The Fourth Military Medical University, Xi'an, China
| | - Man-Lung Fung
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
| | - Kun Zhang
- Department of Neurobiology, The Fourth Military Medical University, Xi'an, China
| | - Chun-Sing Lam
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
| | - Sheng-Xi Wu
- Department of Neurobiology, The Fourth Military Medical University, Xi'an, China
| | - Xiao-Feng Huang
- Department of Pathology and Pathophysiology, The Fourth Military Medical University, Xi'an, China
| | - Shou-Jing Yang
- Department of Pathology and Pathophysiology, The Fourth Military Medical University, Xi'an, China
| | - Margaret T T Wong-Riley
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Ying-Ying Liu
- Department of Neurobiology, The Fourth Military Medical University, Xi'an, China
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49
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Lou Q, Liu YL, Zhang SM, Li YY, Huang XF. [CCL2 promotes angiogenesis of primary rat cardiac microvascular endothelial cells]. Sheng Li Xue Bao 2020; 72:441-448. [PMID: 32820306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The aim of the present study was to investigate the role of chemokine CCL2 in angiogenesis of primary adult rat cardiac microvascular endothelial cells (CMEC). The rat CMECs were isolated and identified through morphology examination and immunostaining with CD31 and factor VIII antibodies. The angiogenesis of CMEC on Matrigel was evaluated at different time points. The expression and secretion of CCL2 during the process of angiogenesis was detected by real-time RT-PCR and ELISA, respectively. The results showed that, the primary rat CMEC was isolated successfully, and the angiogenesis of CMEC was significantly induced after Matrigel treatment for 4 h. The expression of CCL2 and CCR2 were increased during angiogenesis, and the secretion of CCL2 was detected after 2 h of angiogenesis and reached the peak concentration of 1 588.1 pg/mL after 4 h. Either CCL2 blocking antibody or CCR2 antagonist significantly reduced the angiogenesis of CMEC. These results suggest that CCL2 is secreted during the process of angiogenesis of CMEC, and CCL2/CCR2 signaling pathway may play an important role in promoting angiogenesis.
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Affiliation(s)
- Qiang Lou
- National and Local Joint Laboratory for Antibody Drug Development Techniques, Basic Medical School of Henan University, Kaifeng 475004, China.
| | - Yong-Lian Liu
- National and Local Joint Laboratory for Antibody Drug Development Techniques, Basic Medical School of Henan University, Kaifeng 475004, China
| | - Shu-Man Zhang
- The Huaihe Clinical College of Henan University, Kaifeng 475000, China
| | - Yuan-Yuan Li
- National and Local Joint Laboratory for Antibody Drug Development Techniques, Basic Medical School of Henan University, Kaifeng 475004, China
| | - Xiao-Feng Huang
- National and Local Joint Laboratory for Antibody Drug Development Techniques, Basic Medical School of Henan University, Kaifeng 475004, China
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Huang XF, Zhang B, Xia SY, Han Y, Wang C, Yu GH, Feng N. Sources of oxygenated volatile organic compounds (OVOCs) in urban atmospheres in North and South China. Environ Pollut 2020; 261:114152. [PMID: 32066058 DOI: 10.1016/j.envpol.2020.114152] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/07/2020] [Accepted: 02/07/2020] [Indexed: 05/22/2023]
Abstract
Oxygenated volatile organic compounds (OVOCs) are critical precursors of atmospheric ozone (O3) and secondary organic aerosols (SOA). Although China is experiencing increasing O3 pollution from north to south, understanding the major sources of OVOCs in this region is still limited due to their active photochemical behaviors. In this study, five critical OVOCs at a northern urban site (Beijing) and a southern urban site (Shenzhen) were monitored in summer using proton transfer reaction-mass spectrometry (PTR-MS). The mean total concentration of VOCs measured in Beijing (39.4 ppb) was much higher than that measured in Shenzhen (16.7 ppb), with methanol and formaldehyde being the most abundant in concentration at both sites. The source apportionment of daytime OVOCs was conducted effectively using a photochemical age-based parameterization method. Biogenic and anthropogenic secondary sources were the main sources of formaldehyde, acetaldehyde, and acetone at both sites, with a total contribution of 46-82%; acetone also had a large regional-scale background contribution (36-38%); methanol and methyl ethyl ketone (MEK) were mainly derived from anthropogenic primary sources (35-55%) at both sites. In addition, the regional background levels of OVOCs measured in North China were shown to be much higher than those measured in South China. The calculation of the total O3 formation potential (OFP) of OVOCs highlights the comparable contributions from anthropogenic and biogenic sources in both Beijing and Shenzhen, indicating the important role of biogenic OVOC sources even in polluted environments. Since biogenic sources are already important but uncontrollable, anthropogenic emissions in China need to be restricted even more critically in the future.
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Affiliation(s)
- Xiao-Feng Huang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Science and Technology Park, Nanshan District, Shenzhen, 518055, China
| | - Bin Zhang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Science and Technology Park, Nanshan District, Shenzhen, 518055, China
| | - Shi-Yong Xia
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Science and Technology Park, Nanshan District, Shenzhen, 518055, China
| | - Yu Han
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Science and Technology Park, Nanshan District, Shenzhen, 518055, China
| | - Chuan Wang
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Science and Technology Park, Nanshan District, Shenzhen, 518055, China; Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Lishui Road, Nanshan District, Shenzhen, 518057, China
| | - Guang-He Yu
- Environmental Laboratory, PKU-HKUST Shenzhen-Hong Kong Institution, Lishui Road, Nanshan District, Shenzhen, 518057, China.
| | - Ning Feng
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Science and Technology Park, Nanshan District, Shenzhen, 518055, China
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