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Cao Y, Zheng W, Hao B, Xiao H, Cui Y, Huang X, Shi B. Structural Engineering-Enabled Joule Heating Effect Cooperated with Capillary Effect Toward Fast Spreading of Droplets for High-Flux Separation of Viscous Emulsion. Small Methods 2023; 7:e2300513. [PMID: 37530204 DOI: 10.1002/smtd.202300513] [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] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/26/2023] [Indexed: 08/03/2023]
Abstract
Viscous emulsions with poor fluidity and high adhesion are extremely difficult to separate. Herein, high-flux separation of viscous emulsions is realized by developing structural engineered collagen fibers (CFs)-based composite membrane that featured 3D conductive hierarchical fiber structure with the spaced carbon nanofibers (CNFs) and activated carbon (AC) serving as conductive network and competitive adsorption-based demulsifying sites, respectively. The as-designed membrane structure boosts fast spreading of emulsion droplets on membrane surface aided by the synergistic effect of joule heat in situ generated by the spaced CNFs and the capillary effect derived from CFs, which guarantees the full contact of viscous emulsions with the spaced AC for achieving ultra-efficient demulsifying. The permeation of resultant oily filtrate is accelerated by the capillary effect of hierarchically fibrous structured CFs to exhibit fast transport kinetics, therefore accomplishing high-flux separation. The structural engineered membrane achieves high-performance separation toward different viscous emulsions (55.4-123.7 mPa·s) with separation efficiency >99.9% and flux high up to 259 L m-2 h-1 . The investigations provide a novel structural engineering strategy for realizing high-performance separation of viscous emulsions.
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Affiliation(s)
- Yiran Cao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Wan Zheng
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Baicun Hao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
| | - Hanzhong Xiao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
| | - Yiwen Cui
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
| | - Xin Huang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Bi Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
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Ning HY, Cai HJ, Ma TT, Fan CE, Wu DD, Gao FY, Kong F, Zhang FJ, Wang R, Guo HH, Ma RL, Zheng CY, Hao B, Wang HT, Zhang JJ, Zhang L, Wang XY. [Investigation and analysis of airborne allergenic pollen in 4 districts and 5 counties of Hohhot City]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1364-1372. [PMID: 37743296 DOI: 10.3760/cma.j.cn112150-20230116-00034] [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: 09/26/2023]
Abstract
Objective: To investigate the species, concentration and seasonal trends of main airborne allergenic pollen in 4 districts and 5 counties of Hohhot City. Methods: The Department of allergy, Beijing Shijitan Hospital Affiliated to Capital Medical University conducted a cross-sectional study about monitoring the airborne allergenic pollen from August 1, 2021 to July 31, 2022 by the gravitational method in 4 districts and 5 counties of Hohhot City, which include Yuquan District, Xincheng District, Huimin District, Saihan District, Tuoketuo County, Helingeer County, Tumotezuoqi County, Wuchuan County and Qingshuihe County. Daily pollens were counted and identified by optical microscopy, and the data were analyzed. Results: The airborne allergenic pollen was collected every month all year round in 4 districts and 5 counties of Hohhot city. Through the whole year of the total quantity of pollens ranged from 24 850 to 50 154 grains per 1 000 mm2 and two peaks of pollen concentration in air were observed,which happened in spring (from March to May) and in summer and autumn (from July to September). In spring, the main pollens were tree pollens, which principally distributed in Populus pollen (18.29%), Ulmus pollen (8.36%), Pinus pollen (6.20%), Cupressaceae pollen (5.23%), Betulaceae pollen (2.73%), Salix pollen (1.80%) and Quercus pollen (1.16%). In summer and autumn, the main pollens were weed pollens, which mainly included Artemisia pollen (42.73%), Chenopodiaceae pollen or Amaranthaceae pollen (7.46%), Poaceae pollen (2.26%), Humulus pollen or Cannabis pollen (0.60%). Conclusion: There were two peaks of main airborne allergenic pollen in 4 districts and 5 counties of Hohhot City. In the spring peak of pollen, the main airborne pollens were tree pollens. In the summer and autumn peak of pollen, the main airborne pollens were weed pollens. The Artemisia pollen was the most major airborne pollen in this area.
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Affiliation(s)
- H Y Ning
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China Allergy Center, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - H J Cai
- Allergy Center, Hohhot First Hospital, Hohhot 010030, China
| | - T T Ma
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China Allergy Center, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - C E Fan
- Allergy Center, Hohhot First Hospital, Hohhot 010030, China
| | - D D Wu
- Department of Primary Health Care, Hohhot Health Committee, Hohhot 010010, China
| | - F Y Gao
- Department of Allergy, Qingshuihe County Hospital, Hohhot 011600, China
| | - F Kong
- Department of Allergy, Hohhot Huimin District Hospital, Hohhot 010030, China
| | - F J Zhang
- Department of Clinical Laboratory, Ying Xin Road Office East Community Health Service Centre, Hohhot 010000, China
| | - R Wang
- Department of Clinical Laboratory, Daxuexi Road Community Health Service Centre, Hohhot 010018, China
| | - H H Guo
- Department of Allergy and Department of Clinical Laboratory, Tumotezuoqi People's Hospital, Hohhot 010100, China
| | - R L Ma
- Department of Allergy, Tuoketuo County Hospital, Hohhot 010200, China
| | - C Y Zheng
- Department of Allergy, Helingeer County Hospital, Hohhot 011500, China
| | - B Hao
- Department of Allergy, Wuchuan County Hospital, Hohhot 011700, China
| | - H T Wang
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China Allergy Center, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - J J Zhang
- Allergy Center, Hohhot First Hospital, Hohhot 010030, China
| | - L Zhang
- Department of Otorhinolaryngology Head and Neck Surgery and Department of Allergy, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China Beijing Key Laboratory of Allergic Diseases, Beijing Institute of Otorhinolaryngology, Beijing 100005, China
| | - X Y Wang
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China Allergy Center, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
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Cui Y, Wang Y, Hao B, Xiao H, Huang X, Shi B. Water-oil dual-channels enabled exceptional anti-fouling performances for separation of emulsified oil pollutant. J Hazard Mater 2023; 449:131012. [PMID: 36812725 DOI: 10.1016/j.jhazmat.2023.131012] [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: 11/14/2022] [Revised: 02/01/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Oil contamination has been an increasingly concerned environmental issue due to the large quantity of oily wastewater discharged by the industry. The extreme wettability-enabled single-channel separation strategy guarantees efficient separation of oil pollutant from wastewater. However, the ultra-high selective permeability forces the intercepted oil pollutant to form a blocking layer, which weakens the separation capability and slows the kinetics of permeable phase. As a consequence, the single-channel separation strategy fails to maintain a stable flux for a long-term separation process. Herein, we reported a brand-new water-oil dual-channels strategy for accomplishing an ultra-stable long-term separation of emulsified oil pollutant from oil-in-water nano-emulsion by engineering two drastically opposite extreme wettabilities (i.e. superhydrophilicity and superhydrophobicity) to build the water-oil dual-channels. The strategy established the superwetting transport channels to permit water and oil pollutant to permeate through their own channel. In this way, the generation of intercepted oil pollutant was prevented, which guaranteed an exceptional long-lasting (20 h) anti-fouling performance for successful achievement of an ultra-stable separation of oil contamination from oil-in-water nano-emulsion with high flux retention and high separation efficiency. Therefore, our investigations provided a new route for realizing ultra-stable long-term separation of emulsified oil pollutant from wastewater.
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Affiliation(s)
- Yiwen Cui
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China; Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, PR China
| | - Yujia Wang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China; Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, PR China
| | - Baicun Hao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China
| | - Hanzhong Xiao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China
| | - Xin Huang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China; Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, PR China.
| | - Bi Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China; Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, PR China
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Hao B, Xu W, Gao W, Huang T, Lyu L, Lyu D, Xiao H, Li H, Qin J, Sheng L, Liu H. Association between Frailty Assessed Using Two Electronic Medical Record-Based Frailty Assessment Tools and Long-Term Adverse Prognosis in Older Critically Ill Survivors. J Nutr Health Aging 2023; 27:649-655. [PMID: 37702338 DOI: 10.1007/s12603-023-1961-6] [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: 06/13/2023] [Accepted: 07/20/2023] [Indexed: 09/14/2023]
Abstract
OBJECTIVES Frailty has become an independent risk factor for adverse outcomes in critically ill patients. This study aimed to explore the predictive ability of two electronic medical record-based frailty assessment tools, the Hospital Frailty Risk Score (HFRS) and Frailty Index based on physiological and laboratory tests (FI-lab), for long-term adverse prognosis in older critically ill survivors. DESIGN Retrospective observational study. SETTING AND PARTICIPANTS 9,082 critically ill survivors aged ≥ 65 years. MEASUREMENTS The HFRS and the 33-item FI-lab were constructed based on the published literature. Cox and logistic regression models assessed the association between frailty and 1-year mortality and post-discharge care needs. RESULTS 2,586 patients died within 1 year of follow-up. In fully adjusted models, frailty assessed using both the HFRS (per point, hazard ratio [HR] 1.06, 95% confidential interval [CI] 1.05-1.06; intermediate frailty risk, HR 2.00, 95% CI 1.78-2.25; high frailty risk, HR 3.06, 95% CI 2.68-3.50) and FI-lab (per 0.01 points, HR 1.03, 95% CI 1.03-1.03; intermediate frailty risk, HR 1.59, 95% CI 1.44-1.76; high frailty risk, HR 2.30, 95% CI 2.06-2.57) was associated with mortality. Addition of frailty indicators improved the predictive validity of the Sequential Organ Failure Assessment score for mortality (HFRS alone ∆ C-index 0.034; FI-lab alone ∆ C-index 0.016; HFRS and FI-lab combined ∆ C-index 0.042). The HFRS but not the FI-lab was associated with higher probability of post-discharge care needs. CONCLUSION Both the HFRS and FI-lab could independently predict 1-year mortality in older critically ill survivors. Adding the HFRS to the SOFA score model improved it more than adding the FI-lab. The greatest improvement was achieved when both frailty indicators were used together. These findings suggest that electronic medical record-based frailty assessment methods can be useful tools for predicting long-term outcomes in older critically ill patients.
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Affiliation(s)
- B Hao
- Li Sheng, Department of Cardiology, The Second Medical Centre, Chinese PLA General Hospital, Beijing, China, ; Hongbin Liu, Department of Cardiology, The Second Medical Centre, Chinese PLA General Hospital, Beijing, China, e-mail:
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Xiao H, Wang Y, Hao B, Cao Y, Cui Y, Huang X, Shi B. Collagen Fiber-Based Advanced Separation Materials: Recent Developments and Future Perspectives. Adv Mater 2022; 34:e2107891. [PMID: 34894376 DOI: 10.1002/adma.202107891] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 10/02/2021] [Revised: 11/30/2021] [Indexed: 06/14/2023]
Abstract
Separation plays a critical role in a broad range of industrial applications. Developing advanced separation materials is of great significance for the future development of separation technology. Collagen fibers (CFs), the typical structural proteins, exhibit unique structural hierarchy, amphiphilic wettability, and versatile chemical reactivity. These distinctive properties provide infinite possibilities for the rational design of advanced separation materials. During the past 2 decades, many progressive achievements in the development of CFs-derived advanced separation materials have been witnessed already. Herein, the CFs-based separation materials are focused on and the recent progresses in this topic are reviewed. CFs widely existing in animal skins display unique hierarchically fibrous structure, amphiphilicity-enabled surface wetting behaviors, multi-functionality guaranteed covalent/non-covalent reaction versatility. These outstanding merits of CFs bring great opportunities for realizing rational design of a variety of advanced separation materials that were capable of achieving high-performance separations to diverse specific targets, including oily pollutants, natural products, metal ions, anionic contaminants and proteins, etc. Besides, the important issues for the further development of CFs-based advanced separation materials are also discussed.
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Affiliation(s)
- Hanzhong Xiao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yujia Wang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Baicun Hao
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yiran Cao
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yiwen Cui
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xin Huang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Bi Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, 610065, P. R. China
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Huang Y, Xiao H, Pu H, Xue N, Hao B, Huang X, Shi B. Self-driven directional dehydration enabled eco-friendly manufacture of chrome-free leather. J Leather Sci Eng 2022. [DOI: 10.1186/s42825-022-00089-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
AbstractManufacture of eco-friendly chrome-free leather is of great significance for realizing sustainable development of leather industry. Conventional tanning theory believes that it is impossible to convert raw hide to leather without the utilization of cross-linking agent (e.g., chrome salts) among collagen fibers in raw hide. Here, we developed a brand-new leather manufacture strategy that relied on the composite dehydration media enabled self-driven directional dehydration mechanism to accomplish chrome-free leather manufacture for the first time, rather than followed the classic cross-linking mechanism that has been obeyed for more than one century in leather industry. We demonstrated that the essence of leather making is to regulate the water content in raw hide rather than to form cross-linkage among collagen fibers. The composite dehydration media comprised of anhydrous ethanol and molecular sieves (3A activated zeolite powder) successfully guaranteed continuous self-driven directional dehydration of raw hide by establishing stable water concentration gradient between raw hide and ethanol, which significantly increased the dispersity of collagen fibers in raw hide (with the water content reduced from 56.07% to 5.20%), thus obtaining chrome-free leather that is more ecological than chrome-tanned leather due to the elimination of any tanning agent. The as-prepared chrome-free leather exhibited outstanding tear force (174.86 N), tensile strength (24.56 N mm−2), elongation at break (53.28%) and dry-thermal stability, superior to chrome-tanned leather. Notably, the used composite dehydration media was recyclable for chrome-free leather manufacture, therefore facilitating an environmentally benign leather manufacture process. Our investigations are expected to open up a new conceptual leather making strategy that is applicable for realizing substantial manufacture of eco-friendly leather.
Graphical abstract
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Wei Y, Hao B, Wang Y, Wang Y, Xiao H, Li L, Huang X, Shi B. Tannery solid waste-derived cross-scale deformable piezoresistive sensors for monitoring human body motions. J Mater Chem C 2022. [DOI: 10.1039/d2tc00718e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Cross-scale deformable piezoresistive sensors with a pillar-supported directional multi-layer structure were prepared by using tannery solid wastes, which were highly efficient for monitoring human body motions.
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Affiliation(s)
- Yingjie Wei
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Baicun Hao
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yanan Wang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yujia Wang
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Hanzhong Xiao
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Li Li
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, Chengdu 610065, P. R. China
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610065, P. R. China
- NMPA Key Laboratory for Human Evaluation and Big Data of Cosmetics, Sichuan University, Chengdu 610065, P. R. China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu 610065, P. R. China
| | - Xin Huang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Bi Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P. R. China
- Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, P. R. China
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Jia J, Yuan Q, Hui JW, Liang JW, Wang X, Liu HH, Wang ZG, Dai XQ, Hao B, Gao RQ, Jiang FC, Ma HL. [Investigation of contamination of SARS-CoV-2 in imported frozen seafood from a foreign cargo ship and risk factors for infection in stevedores in Qingdao]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1360-1364. [PMID: 34814554 DOI: 10.3760/cma.j.cn112338-20210209-00107] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the contamination status of SARS-CoV-2 in imported frozen seafood from a Russia cargo ship in Qingdao and to analyze the risk factors for infection in local stevedores. Methods: The method of "two-stage, full coverage and mixed sampling" was used to collect the seafood packaging samples for the nucleic acid detection of SARS-CoV-2 by real-time fluorescent quantitative RT-PCR. A unified questionnaire was designed to investigate 71 stevedores in two shifts through telephone interview. The stevedores were divided into two groups, with 23 in the shit with two infections was group A and 48 in the shift without infection was group B. Software Epi Info7.2 was used to identify the risk factors for SARS-CoV-2 infections in the stevedores. Results: In the frozen seafood from a Russia cargo ship, the total positive rate of SARS-CoV-2 nucleic acid in the frozen seafood was 11.53% (106/919). The positive rate of SARS-CoV-2 nucleic acid in the frozen seafood unloaded by group A (14.29%,70/490) was significantly higher than that in the frozen seafood unloaded by group B (8.39%,36/429)(χ2=7.79,P=0.01) and the viral loads detected in the frozen seafood unloaded by group A were higher than those detected in the frozen seafood unloaded by group B. The scores of personal protection and behaviors in the stevedores in group A were significantly lower than those in group B (P<0.05), and toilet use, smoking and improper hand washing before meals were the risk factors for the infection. Conclusions: The imported frozen seafood was contaminated by SARS-CoV-2 and the contamination distribution was uneven. Supervision and management of personal occupational protection and behaviors of workers engaged in imported frozen food transportation should be strengthened. It is suggested that a closed-loop monitoring and management system for the whole process of "fishing-transport- loading/unloading" should be established by marine fishery authority.
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Affiliation(s)
- J Jia
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - Q Yuan
- Shandong Center for Disease Control and Prevention, Ji'nan 250014,China
| | - J W Hui
- Qingdao Shibei District Center for Disease Control and Prevention, Qingdao 266011, China
| | - J W Liang
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - X Wang
- Qingdao Shibei District Center for Disease Control and Prevention, Qingdao 266011, China
| | - H H Liu
- Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z G Wang
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - X Q Dai
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - B Hao
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - R Q Gao
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - F C Jiang
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao 266033,China
| | - H L Ma
- Chinese Center for Disease Control and Prevention, Beijing 102206, China
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Hao B, Wang F, Huang H, Wu Y, Jia S, Liao Y, Mao H. Tannin foam immobilized with ferric ions for efficient removal of ciprofloxacin at low concentrations. J Hazard Mater 2021; 414:125567. [PMID: 34030414 DOI: 10.1016/j.jhazmat.2021.125567] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 12/16/2020] [Revised: 02/09/2021] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
The presence of ciprofloxacin (CIP) in natural water may cause potential threats to the environment. Adsorption is a convenient and efficient method to remove CIP from aqueous solution. Bayberry tannin (BT), a natural polyphenol, has been utilized in the synthesis of tannin foam (TF) due to its abundant polyphenolic hydroxyls to chelate with metal ions. The obtained TF was subsequently immobilized with Fe3+ via a facile chelative adsorption to fabricate functional tannin foam (TF-Fe), which was highly porous, with a porosity of 78.93%. The Fe species in the TF-Fe featured good dispersity, which were active for chelative adsorption of CIP. The adsorption of CIP on the TF-Fe was a pH-dependent process. At the optimized pH of 7.0, the TF-Fe provided the adsorption capacity of 91.8 mg g-1. When applied in removal of CIP at the low concentration of 2.0 µg mL-1, a high removal efficiency of 96.60% was still obtained, which was superior to commercial activated carbon (28.78%). The adsorption kinetics were well fitted by the pseudo-second-order rate model while the adsorption isotherms were well described by the Langmuir model. The TF-Fe was capable of recycling, which still maintained a high removal efficiency of 92.25% in the 5th cycle.
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Affiliation(s)
- Baicun Hao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Fang Wang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Hui Huang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Yilan Wu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Shuanghui Jia
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Yang Liao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Hui Mao
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, PR China.
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Li H, Zheng W, Xiao H, Hao B, Wang Y, Huang X, Shi B. Collagen fiber membrane-derived chemically and mechanically durable superhydrophobic membrane for high-performance emulsion separation. J Leather Sci Eng 2021. [DOI: 10.1186/s42825-021-00060-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Developing high-performance separation membrane with good durability is a highly desired while challenging issue. Herein, we reported the successful fabrication of chemically and mechanically durable superhydrophobic membrane that was prepared by embedding UiO-66 as size-sieving sites within the supramolecular fiber structure of collagen fiber membrane (CFM), followed by the polydimethylsiloxane (PDMS) coating. The as-prepared CFM/UiO-66(12)/PDMS membrane featured capillary effect-enhanced separation flux and homogeneous porous channels guaranteed high separation efficiency. When utilized as double-layer separation membranes, this new type of composite membranes separated various surfactant stabilized water-in-oil microemulsions and nanoemulsions, with the separation efficiency high up to 99.993 % and the flux as high as 973.3 L m− 2 h− 1. Compared with commercial polytetrafluoro ethylene (PTFE) membrane, the advantage of the double-layer CFM/UiO-66(12)/PDMS membranes in separation flux was evident, which exhibited one order of magnitude higher than that of commercial PTFE membrane. The CFM/UiO-66(12)/PDMS membrane was acid-alkali tolerant, UV-aging resistant and reusable for emulsion separation. Notably, the CFM/UiO-66(12)/PDMS membrane was mechanically durable against strong mechanical abrasion, which was still capable of separating diverse water-in-oil emulsions after the abrasion with sandpaper and assembled as double-layer separation membranes. We anticipate that the combination of CFM and metal organic frameworks (MOFs) is an effective strategy for fabricating high-performance separation membrane with high mechanical and chemical durability.
Graphical Abstract
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11
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Chen G, Hao B, Wang Y, Wang Y, Xiao H, Li H, Huang X, Shi B. Insights into Regional Wetting Behaviors of Amphiphilic Collagen for Dual Separation of Emulsions. ACS Appl Mater Interfaces 2021; 13:18209-18217. [PMID: 33845568 DOI: 10.1021/acsami.0c22601] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Industrial manufacture generates a huge quantity of emulsion wastewater, which causes serious threats to the aquatic ecosystems. Water-in-oil (W/O) and oil-in-water (O/W) emulsions are two major types of emulsions discharged by industries. However, dual separation of W/O and O/W emulsions remains a challenging issue due to the contradictory permselectivity for separating the two emulsions. In the present investigation, the amphiphilicity-derived regional wetting mechanism of water and oil on the amphiphilic collagen fibers was revealed based on the combination of numerous experiments and molecular dynamics (MD) simulations. Electrostatic interactions and van der Waals force were manifested to be the driving forces of regional wetting in the hydrophilic and hydrophobic regions, respectively. The regional wetting endowed amphiphilic collagen fibers with underwater oleophobicity and underoil hydrophilicity, which enabled dual separation of emulsions by selectively retaining the dispersed water phase of W/O emulsions in the hydrophilic regions while the dispersed oil phase of O/W emulsions in the hydrophobic regions. The achieved separation efficiency was higher than 99.98%, and the flux reached 3337.6 L m-2 h-1. Initial wetting status significantly affects the regional wetting-enabled dual separation. Based on the MD simulations, amphiphilic intramolecular conformations of tropocollagen were suggested to be the origins of regional wetting on collagen fibers. Our findings may pave the way for developing high-performance dual separation materials that are promising to be utilized for the practical treatment of emulsion wastewater.
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Affiliation(s)
- Guangyan Chen
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Baicun Hao
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Yujia Wang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Yanan Wang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Hanzhong Xiao
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Huifang Li
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Xin Huang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Bi Shi
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
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Song HF, Deng X, Yang N, Hao B, Hu YB, Shi YW, Xue L, Zhao H. Impulse Control and ERP Characteristics of Patients with Mental Disorder Caused by Traumatic Brain Injury. Fa Yi Xue Za Zhi 2020; 36:326-332. [PMID: 32705844 DOI: 10.12116/j.issn.1004-5619.2020.03.006] [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] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Indexed: 11/30/2022]
Abstract
Abstract Objective To explore the impulse control and event-related potential (ERP) characteristics of patients with mental disorders caused by traumatic brain injury (TBI) in forensic psychiatry identification and to provide objective auxiliary indicators for forensic psychiatry identification. Methods Thirty patients (TBI group) with mental disorders caused by traumatic brain injury, who were identified as mild psychiatric impairment by judicial psychiatry, including 24 males and 6 females, as well as the thirty people in the control group participated in the study. All the participants completed Barratt Impulsiveness Scale-11 (BIS-11) and ERP induced by Go/NoGo tasks. BIS-11 and ERP data were collected and analyzed. Results The results of the BIS-11 showed that the total score and subscale scores of the TBI group were higher compared to the control group (P<0.05). Moreover, the TBI group exhibited significantly lower NoGo-N2 amplitude and lower NoGo-P3 amplitude than the control group. The NoGo-N2 amplitude was larger than the Go-N2 amplitude, and the NoGo-P3 amplitude was larger than the Go-P3 amplitude in both groups (P<0.05). Conclusion Traumatic brain injury could impair impulse control of mild psychiatric impairment patients, and the amplitudes of NoGo-N2 and NoGo-P3 could be important parameters to evaluate the impulse control of patients with mental disorders caused by traumatic brain injury.
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Affiliation(s)
- H F Song
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - X Deng
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - N Yang
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - B Hao
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Y B Hu
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Y W Shi
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Guangzhou 510080, China
| | - L Xue
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Guangzhou 510080, China
| | - H Zhao
- Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Guangzhou 510080, China
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Xiao M, Pang M, Peng Y, Hao B, Liao Y, Mao H, Huo F. Zeolitic imidazolate framework-8 templated synthesis of a heterogeneous Pd catalyst for remediation of chlorophenols pollution. Chem Commun (Camb) 2020; 56:3143-3146. [PMID: 32057049 DOI: 10.1039/c9cc09494f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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
Herein, a heterogeneous Pd catalyst was prepared by embedding Pd nanoparticles in a highly porous nitrogen-doped mesoporous carbon (NMCs) synthesized by the ZIF-8 template. The as-prepared Pd/NMC catalyst was efficient and recyclable in mild catalytic hydrodechlorination of 4-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol, showing superior performances to those of the activated carbon-supported Pd commercial catalysts.
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Affiliation(s)
- Meng Xiao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China.
| | - Mengting Pang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China.
| | - Yu Peng
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China.
| | - Baicun Hao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China.
| | - Yang Liao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China. and Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Sichuan Normal University, Ministry of Education, Chengdu 610066, P. R. China
| | - Hui Mao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China. and Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Sichuan Normal University, Ministry of Education, Chengdu 610066, P. R. China
| | - Fengwei Huo
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing 211816, P. R. China.
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Kuang Y, Chen C, Li K, Hao B, Ma J, Liao Y, Mao H, Huo F. Encapsulating NiCo 2O 4 inside metal-organic framework sandwiched graphene oxide 2D composite nanosheets for high-performance lithium-ion batteries. Nanoscale 2019; 11:15166-15172. [PMID: 31380868 DOI: 10.1039/c9nr02787d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Ternary transition metal oxides are promising candidates for developing high-performance lithium-ion batteries. In the present investigation, we explored sandwiched composite nanosheets by encapsulating NiCo2O4 nanoparticles inside the pores of ZIF-67 crystals that were in situ grown on both surfaces of graphene oxide (GO). SEM and TEM observations confirmed the successful construction of the sophisticated architecture. For the designed electrode structure, the scaffold of GO provided a fast conductive highway for the encapsulated NiCo2O4 nanoparticles, while the porous and elastic framework of ZIF-67 together with the flexible GO guaranteed efficient accommodation to the volumetric change of NiCo2O4. Moreover, the highly porous composite nanosheets are suitable for electrolyte infiltration, with enhanced ionic transportation kinetics. Accordingly, the reversible capacity of NiCo2O4@ZIF-67/GO was high up to 1025 mA h g-1 and 740 mA h g-1 after 80 cycles at 0.5 and 2.0 A g-1, respectively. At the current density of 4.0 and 8.0 A g-1, the capacity was still retained at 500 and 320 mA h g-1, respectively. Other analyses further manifested that the distinctive structure of NiCo2O4@ZIF-67/GO enhanced the charge transportation kinetics in comparison with the control sample of NiCo2O4@ZIF-67. Our strategy provided a new concept for developing high-performance electrode materials of lithium-ion batteries.
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Affiliation(s)
- Yiwen Kuang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China.
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Hao B, Chen Z, Zeng G, Huang L, Luan C, Xie Z, Chen J, Bao M, Tian X, Xu B, Wang Y, Wu J, Xia S, Yuan L, Huang J. Efficacy, safety and immunogenicity of live attenuated varicella vaccine in healthy children in China: double-blind, randomized, placebo-controlled clinical trial. Clin Microbiol Infect 2019; 25:1026-1031. [DOI: 10.1016/j.cmi.2018.12.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 12/18/2018] [Accepted: 12/22/2018] [Indexed: 10/27/2022]
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Hao B, Xiao M, Wang Y, Shang H, Ma J, Liao Y, Mao H. Recyclable Amphiphilic Metal Nanoparticle Colloid Enabled Atmospheric Oxidation of Alcohols. ACS Appl Mater Interfaces 2018; 10:34332-34339. [PMID: 30226040 DOI: 10.1021/acsami.8b12989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Developing amphiphilic colloid catalysts is essentially important for realizing environmentally benign biphasic catalysis under atmospheric conditions. Herein, a linear structured plant polyphenol was employed as an amphiphilic stabilizer for preparing a series of amphiphilic Pd nanoparticles (PdNPs) colloids. For the as-prepared PdNPs colloids, the phenolic hydroxyls of plant polyphenols were responsible for the stabilization of PdNPs, whereas the rigid aromatic scaffold of plant polyphenols effectively suppressed the PdNPs from aggregation by providing a high steric effect. Thanks to the coexistence of hydrophilic phenolic hydroxyls and hydrophobic aromatic rings, the plant polyphenols induced tunable amphiphilic properties into the PdNPs, allowing an easier wetting of PdNPs with the substrate molecules. By tuning the content of plant polyphenols in the colloid, the particle size (3.17-4.73 nm) and the dispersity of the PdNPs were facilely controlled. When applied for atmospheric oxidation of insoluble alcohols in water by air, the amphiphilic PdNPs preferentially absorbed the alcohol substrates to create a relatively high-substrate-concentration microenvironment, which improved the mass transfer in the biphasic catalysis, allowing the proceeding of low-temperature (50 °C) atmospheric oxidation of diverse alcohols with high catalytic conversion, including aliphatic alcohols, cyclic aliphatic alcohols, and aromatic alcohols. Furthermore, the amphiphilic PdNPs colloid also exhibited excellent reusability with a conversion yield high up to 97.96% in the fifth cycle. In contrast, the control catalysts of poly(vinylpyrrolidone)- and poly(ethylene glycol)-stabilized PdNPs were completely inactivated in the fifth cycle. As a consequence, our findings provided a new route for developing an environmentally benign aqueous colloid catalyst that is both highly active and recyclable for mild biphasic oxidation reaction systems.
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Affiliation(s)
- Baicun Hao
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
| | - Meng Xiao
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
| | - Yujia Wang
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
| | - Hongyan Shang
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest , Sichuan Normal University, Ministry of Education , Chengdu 610066 , P. R. China
| | - Jun Ma
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest , Sichuan Normal University, Ministry of Education , Chengdu 610066 , P. R. China
| | - Yang Liao
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest , Sichuan Normal University, Ministry of Education , Chengdu 610066 , P. R. China
| | - Hui Mao
- College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , P. R. China
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest , Sichuan Normal University, Ministry of Education , Chengdu 610066 , P. R. China
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Yalla K, Elliott C, Day JP, Findlay J, Barratt S, Hughes ZA, Wilson L, Whiteley E, Popiolek M, Li Y, Dunlop J, Killick R, Adams DR, Brandon NJ, Houslay MD, Hao B, Baillie GS. FBXW7 regulates DISC1 stability via the ubiquitin-proteosome system. Mol Psychiatry 2018; 23:1278-1286. [PMID: 28727686 PMCID: PMC5984089 DOI: 10.1038/mp.2017.138] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 05/12/2017] [Accepted: 05/15/2017] [Indexed: 01/27/2023]
Abstract
Disrupted in schizophrenia 1 (DISC1) is a multi-functional scaffolding protein that has been associated with neuropsychiatric disease. The role of DISC1 is to assemble protein complexes that promote neural development and signaling, hence tight control of the concentration of cellular DISC1 in neurons is vital to brain function. Using structural and biochemical techniques, we show for we believe the first time that not only is DISC1 turnover elicited by the ubiquitin proteasome system (UPS) but that it is orchestrated by the F-Box protein, FBXW7. We present the structure of FBXW7 bound to the DISC1 phosphodegron motif and exploit this information to prove that disruption of the FBXW7-DISC1 complex results in a stabilization of DISC1. This action can counteract DISC1 deficiencies observed in neural progenitor cells derived from induced pluripotent stem cells from schizophrenia patients with a DISC1 frameshift mutation. Thus manipulation of DISC1 levels via the UPS may provide a novel method to explore DISC1 function.
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Affiliation(s)
- K Yalla
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - C Elliott
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
- Institute of Psychiatry, Psychology and Neuroscience, King’s College, London, UK
| | - J P Day
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - J Findlay
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - S Barratt
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Z A Hughes
- Neuroscience Research Unit, Pfizer Inc, Cambridge, MA, USA
| | - L Wilson
- Neuroscience Research Unit, Pfizer Inc, Cambridge, MA, USA
| | - E Whiteley
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - M Popiolek
- Neuroscience Research Unit, Pfizer Inc, Cambridge, MA, USA
| | - Y Li
- Department of Molecular Biology and Biophysics, University of Connecticut Health Centre, Farmington, CT, USA
| | - J Dunlop
- AstraZeneca, Neuroscience, Innovative Medicines & Early Development, Waltham, MA, USA
| | - R Killick
- Institute of Psychiatry, Psychology and Neuroscience, King’s College, London, UK
| | - D R Adams
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, UK
| | - N J Brandon
- AstraZeneca, Neuroscience, Innovative Medicines & Early Development, Waltham, MA, USA
| | - M D Houslay
- Institute of Pharmaceutical Science, King’s College, London, UK
| | - B Hao
- Department of Molecular Biology and Biophysics, University of Connecticut Health Centre, Farmington, CT, USA
| | - G S Baillie
- College of Veterinary Medical and Life Sciences, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
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Wu FY, Tang XH, Gai LL, Kong XP, Hao B, Huang EW, Shi H, Sheng LH, Quan L, Liu SP, Luo B. [Correlation between Genetic Variants and Polymorphism of Caveolin and Sudden Unexplained Death]. Fa Yi Xue Za Zhi 2017; 33:114-119. [PMID: 29231014 DOI: 10.3969/j.issn.1004-5619.2017.02.002] [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] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To explore the genetic variation sites of caveolin (CAV) and their correlation with sudden unexplained death (SUD). METHODS The blood samples were collected from SUD group (71 cases), coronary artery disease (CAD) group (62 cases) and control group (60 cases), respectively. The genome DNA were extracted and sequencing was performed directly by amplifying gene coding region and exon-intron splicing region of CAV1 and CAV3 using PCR. The type of heritable variation of CVA was confirmed and statistical analysis was performed. RESULTS A total of 4 variation sites that maybe significative were identified in SUD group, and two were newfound which were CAV1: c.45C>T (T15T) and CAV1:c.512G>A (R171H), and two were SNP loci which were CAV1:c.246C>T (rs35242077) and CAV3:c.99C>T (rs1008642) and had significant difference (P<0.05) in allele and genotype frequencies between SUD and control groups. Forementioned variation sites were not found in CAD group. CONCLUSIONS The variants of CAV1 and CAV3 may be correlated with a part of SUD group.
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Affiliation(s)
- F Y Wu
- Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - X H Tang
- Dongyuan Public Security Bureau, Dongyuan 517500, China
| | - L L Gai
- Huangpu Branch of Guangzhou Municipal Public Security Bureau, Guangzhou 510530, China
| | - X P Kong
- Panyu Branch of Guangzhou Municipal Public Security Bureau, Guangzhou 511430, China
| | - B Hao
- Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - E W Huang
- Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - H Shi
- Institute of Criminal Science and Technology, Guangzhou Municipal Public Security Bureau, Guangzhou 510030, China
| | - L H Sheng
- Institute of Criminal Science and Technology, Shenzhen Municipal Public Security Bureau, Shenzhen 518008, China
| | - L Quan
- Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - S P Liu
- Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - B Luo
- Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
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Wu FY, Gai LL, Kong XP, Hao B, Huang EW, Shi H, Sheng LH, Quan L, Liu SP, Luo B. [Research Progress of the Correlation between Caveolin and Unexpected Sudden Cardiac Death]. Fa Yi Xue Za Zhi 2017; 33:284-288. [PMID: 29230996 DOI: 10.3969/j.issn.1004-5619.2017.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Indexed: 11/18/2022]
Abstract
Due to the negative autopsy and without cardiac structural abnormalities, unexpected sudden cardiac death (USCD) is always a tough issue for forensic pathological expertise. USCD may be associated with parts of fatal arrhythmic diseases. These arrhythmic diseases may be caused by disorders of cardiac ion channels or channel-related proteins. Caveolin can combine with multiple myocardial ion channel proteins through its scaffolding regions and plays an important role in maintaining the depolarization and repolarization of cardiac action potential. When the structure and function of caveolin are affected by gene mutations or abnormal protein expression, the functions of the regulated ion channels are correspondingly impaired, which leads to the occurrence of multiple channelopathies, arrhythmia or even sudden cardiac death. It is important to study the effects of caveolin on the functions of ion channels for exploring the mechanisms of malignant arrhythmia and sudden cardiac death.
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Affiliation(s)
- F Y Wu
- Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - L L Gai
- Huangpu Branch of Guangzhou Municipal Public Security Bureau, Guangzhou 510530, China
| | - X P Kong
- Panyu Branch of Guangzhou Municipal Public Security Bureau, Guangzhou 511430, China
| | - B Hao
- Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - E W Huang
- Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - H Shi
- Guangzhou Institute of Criminal Science and Technology, Guangzhou 510030, China
| | - L H Sheng
- Institute of Criminal Science and Technology, Shenzhen Municipal Public Security Bureau, Shenzhen 518008, China
| | - L Quan
- Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - S P Liu
- Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
| | - B Luo
- Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China
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Hao B, Caulfield JC, Hamilton ML, Pickett JA, Midega CAO, Khan ZR, Wang J, Hooper AM. Biosynthesis of natural and novel C-glycosylflavones utilising recombinant Oryza sativa C-glycosyltransferase (OsCGT) and Desmodium incanum root proteins. Phytochemistry 2016; 125:73-87. [PMID: 26923852 DOI: 10.1016/j.phytochem.2016.02.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/12/2016] [Accepted: 02/19/2016] [Indexed: 06/05/2023]
Abstract
The rice C-glycosyltransferase (OsCGT) is one of only a small number of characterised plant C-glycosyltransferases (CGT) known. The enzyme C-glucosylates a 2-hydroxyflavanone substrate with UDP-glucose as the sugar donor to produce C-glucosyl-2-hydroxyflavanones. We tested substrate specificity of the enzyme, using synthetic 2-hydroxyflavanones, and showed it has the potential to generate known natural CGFs that have been isolated from rice and also other plants. In addition, we synthesised novel, unnatural 2-hydroxyflavanone substrates to test the B-ring chemical space of substrate accepted by the OsCGT and demonstrated the OsCGT capacity as a synthetic reagent to generate significant quantities of known and novel CGFs. Many B-ring analogues are tolerated within a confined steric limit. Finally the OsCGT was used to generate novel mono-C-glucosyl-2-hydroxyflavanones as putative biosynthetic intermediates to examine the potential of Desmodium incanum biosynthetic CGTs to produce novel di-C-glycosylflavones, compounds implicated in the allelopathic biological activity of Desmodium against parasitic weeds from the Striga genus.
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Affiliation(s)
- B Hao
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China; Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - J C Caulfield
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - M L Hamilton
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - J A Pickett
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - C A O Midega
- International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya.
| | - Z R Khan
- International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya.
| | - J Wang
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - A M Hooper
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
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Hooper AM, Caulfield JC, Hao B, Pickett JA, Midega CAO, Khan ZR. Isolation and identification of Desmodium root exudates from drought tolerant species used as intercrops against Striga hermonthica. Phytochemistry 2015; 117:380-387. [PMID: 26164239 PMCID: PMC4560159 DOI: 10.1016/j.phytochem.2015.06.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/16/2015] [Accepted: 06/25/2015] [Indexed: 05/04/2023]
Abstract
Plants from the genus Desmodium, in particular D. uncinatum, are used on sub-Saharan small-holder farms as intercrops to inhibit parasitism of cereal crops by Striga hermonthica and Striga asiatica via an allelopathic mechanism. The search for Desmodium species which are adapted to more arid conditions, and which show resilience to increased drought stress, previously identified D. intortum, D. incanum and D. ramosissimum as potential drought tolerant intercrops. Their potential as intercrops was assessed for resource poor areas of rain-fed cereal production where drought conditions can persist through normal meteorological activity, or where drought may have increasing impact through climate change. The chemical composition of the root exudates were characterised and the whole exudate biological activity was shown to be active in pot experiments for inhibition of Striga parasitism on maize. Furthermore, rain fed plot experiments showed the drought tolerant Desmodium intercrops to be effective for Striga inhibition. This work demonstrates the allelopathic nature of the new drought tolerant intercrops through activity of root exudates and the major compounds seen in the exudates are characterised as being C-glycosylflavonoid. In young plants, the exudates show large qualitative differences but as the plants mature, there is a high degree of convergence of the C-glycosylflavonoid exudate chemical profile amongst active Desmodium intercrops that confers biological activity. This defines the material for examining the mechanism for Striga inhibition.
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Affiliation(s)
- A M Hooper
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - J C Caulfield
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - B Hao
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - J A Pickett
- Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - C A O Midega
- International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya.
| | - Z R Khan
- International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya.
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Clancy C, Shields R, Potoski B, Hao B, Bermudez C, Pilewski J, Crespo M, Silveira F, Nguyen M. Identifying Optimal Treatment Regimens for Lung and Heart Transplant Patients (LTx, HTx pts) Infected With Extreme-Drug Resistant (XDR) Gram-Negative Bacteria. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.410] [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: 11/25/2022] Open
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Clancy CJ, Chen L, Shields RK, Zhao Y, Cheng S, Chavda KD, Hao B, Hong JH, Doi Y, Kwak EJ, Silveira FP, Abdel-Massih R, Bogdanovich T, Humar A, Perlin DS, Kreiswirth BN, Hong Nguyen M. Epidemiology and molecular characterization of bacteremia due to carbapenem-resistant Klebsiella pneumoniae in transplant recipients. Am J Transplant 2013; 13:2619-33. [PMID: 24011185 PMCID: PMC3955300 DOI: 10.1111/ajt.12424] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [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: 03/06/2013] [Accepted: 06/28/2013] [Indexed: 01/25/2023]
Abstract
We conducted a retrospective study of 17 transplant recipients with carbapenem-resistant Klebsiella pneumoniae bacteremia, and described epidemiology, clinical characteristics and strain genotypes. Eighty-eight percent (15/17) of patients were liver or intestinal transplant recipients. Outcomes were death due to septic shock (18%), cure (24%) and persistent (>7 days) or recurrent bacteremia (29% each). Thirty- and 90-day mortality was 18% and 47%, respectively. Patients who were cured received at least one active antimicrobial agent and underwent source control interventions. Forty-one percent (7/17) of patients had intra-abdominal infections; all except one developed persistent/recurrent bacteremia despite drainage. Two patients tolerated persistent bacteremia for >300 days. All patients except one were infected with sequence type 258 (ST258), K. pneumoniae carbapenemase (KPC)-2-producing strains harboring a mutant ompK35 porin gene; the exception was infected with an ST37, KPC-3-producing strain. Seventy-one percent (12/17) of patients were infected with ST258 ompK36 mutant strains. In two patients, persistent bacteremia was caused by two strains with different ompK36 genotypes. Three ompK36 mutations were associated with significantly higher carbapenem minimum inhibitory concentrations than wild-type ompK36. Pulse-field gel electrophoresis identified a single ST258 lineage; serial strains from individual patients were indistinguishable. In conclusion, KPC-K. pneumoniae bacteremia exhibited highly diverse clinical courses following transplantation, and was caused by clonal ST258 strains with different ompK36 genotypes.
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Affiliation(s)
- C. J. Clancy
- University of Pittsburgh, Pittsburgh, PA,XDR Pathogen Laboratory, University of Pittsburgh Medical Center, Pittsburgh, PA,Pittsburgh VA Healthcare System, Pittsburgh, PA
| | - L. Chen
- Public Health Research Institute, New Jersey Medical School-University of Medicine and Dentistry of New Jersey, Newark, NJ
| | - R. K. Shields
- University of Pittsburgh, Pittsburgh, PA,XDR Pathogen Laboratory, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Y. Zhao
- Public Health Research Institute, New Jersey Medical School-University of Medicine and Dentistry of New Jersey, Newark, NJ
| | - S. Cheng
- University of Pittsburgh, Pittsburgh, PA
| | - K. D. Chavda
- Public Health Research Institute, New Jersey Medical School-University of Medicine and Dentistry of New Jersey, Newark, NJ
| | - B. Hao
- University of Pittsburgh, Pittsburgh, PA,XDR Pathogen Laboratory, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - J. H. Hong
- University of Pittsburgh, Pittsburgh, PA
| | - Y. Doi
- University of Pittsburgh, Pittsburgh, PA
| | - E. J. Kwak
- University of Pittsburgh, Pittsburgh, PA
| | | | | | | | - A. Humar
- University of Pittsburgh, Pittsburgh, PA
| | - D. S. Perlin
- Public Health Research Institute, New Jersey Medical School-University of Medicine and Dentistry of New Jersey, Newark, NJ
| | - B. N. Kreiswirth
- Public Health Research Institute, New Jersey Medical School-University of Medicine and Dentistry of New Jersey, Newark, NJ
| | - M. Hong Nguyen
- University of Pittsburgh, Pittsburgh, PA,XDR Pathogen Laboratory, University of Pittsburgh Medical Center, Pittsburgh, PA,Corresponding author: M. Hong Nguyen,
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Li GY, Mo ZL, Li J, Xiao P, Hao B, Guo YH. Development of a multiplex PCR for the identification of pathogenic Edwardsiella tarda and application to edwardsiellosis diagnostics. J Fish Dis 2013; 36:151-157. [PMID: 23126448 DOI: 10.1111/j.1365-2761.2012.01446.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 08/09/2011] [Accepted: 08/10/2011] [Indexed: 06/01/2023]
Affiliation(s)
- G Y Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
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25
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Nguyen MH, Wissel MC, Shields RK, Salomoni MA, Hao B, Press EG, Shields RM, Cheng S, Mitsani D, Vadnerkar A, Silveira FP, Kleiboeker SB, Clancy CJ. Performance of Candida Real-time Polymerase Chain Reaction, -D-Glucan Assay, and Blood Cultures in the Diagnosis of Invasive Candidiasis. Clin Infect Dis 2012; 54:1240-8. [DOI: 10.1093/cid/cis200] [Citation(s) in RCA: 215] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Liu J, Ibrahim NM, Hao B, Chen L. Changes in left ventricular structure and function in patients with metabolic syndrome. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
AIMS Genes uniquely expressed in vivo may contribute to the overall pathogenicity of an organism and are likely to serve as potential targets for the development of new vaccine. This study aims to screen the genes expressed in vivo after Vibrio anguillarum infection by in vivo-induced antigen technology (IVIAT). METHODS AND RESULTS The convalescent-phase sera were obtained from turbot (Scophthalmus maximus) survived after infection by the virulent V. anguillarum M3. The pooled sera were thoroughly adsorbed with M3 cells and Escherichia coli BL21 (DE3) cells. A genomic expression library of M3 was constructed and screened for the identification of immunogenic proteins by colony immunoblot analysis with the adsorbed sera. After three rounds of screening, 19 putative in vivo-induced (ivi) genes were obtained. These ivi genes were catalogued into four functional groups: regulator/signalling, metabolism, biological process and hypothetical proteins. Three ivi genes were insertion-mutated, and the growth and 50% lethal dose (LD(50) ) of these mutants were evaluated. CONCLUSIONS The identification of ivi genes in V. anguillarum M3 sheds light on understanding the bacterial pathogenesis and provides novel targets for the development of new vaccines and diagnostic reagents. SIGNIFICANCE AND IMPACT OF THE STUDY To the best of our knowledge, this is the first report describing in vivo-expressed genes of V. anguillarum using IVIAT. The screened ivi genes in this study could be new virulent factors and targets for the development of vaccine, which may have implications for the development of diagnostic regents.
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Affiliation(s)
- Y-X Zou
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
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Abstract
BACKGROUND Bicyclol is a novel synthetic 'anti-hepatitis' drug, used in China for chronic hepatitis B. Until now, systematic reviews of bicyclol therapy have not been performed. OBJECTIVES To study the benefits and harms of bicyclol for patients with chronic hepatitis B. SEARCH STRATEGY We searched The Cochrane Hepato-Biliary Group Controlled Trials Register (July 2005), The Cochrane Central Register of Controlled Trials in The Cochrane Library (Issue 2, 2005), MEDLINE (1950 to July 2005), EMBASE (1980 to July 2005), Science Citation Index Expanded (1945 to July 2005), The Chinese Biomedical Database (1994 to August 2005), VIP Chinese Science and Technique Journals Database (1994 to August 2005), and China National Infrastructure (CNKI)(1994 to August 2005). We also contacted manufacturers and researchers in the field. SELECTION CRITERIA Randomised clinical trials with bicyclol versus no intervention, placebo, or other interventions were included, irrespective of blinding, publication status, or language. DATA COLLECTION AND ANALYSIS The primary outcome measures were mortality (total and liver-related) and liver-related morbidity (eg, cirrhosis and carcinoma). Secondary outcome measures were viral response and liver histology. MAIN RESULTS The search identified one randomised clinical trial comparing bicyclol with bifendate (biphenyldicarboxylate) for patients with hepatitis B. The follow-up was three months. There was no evidence that bicyclol was superior to bifendate for loss of HBeAg (RR 1.38, 95% CI 0.95 to 2.00), seroconversion of HBeAg to HBeAb (RR 1.44, 95% CI 0.90 to 2.29), loss of HBV DNA (RR 1.19, 95%CI 0.93 to 1.53), or number of patients with normalised alanine aminotransferase and aspartate aminotransferase activity (RR 0.88, 95% CI 0.70 to 1.11 and RR 0.97, 95% CI 0.79 to 1.20, respectively). AUTHORS' CONCLUSIONS Only one randomised clinical trial has examined the potential benefit of bicyclol for patients with chronic hepatitis B. This small, short-term trial found no evidence to support or refute its use. Large, randomised double-blind clinical trials with long-term follow-up are needed to examine the possible benefits and harms associated with bicyclol. Bicyclol can only be recommended for use in randomised trials.
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Affiliation(s)
- T Wu
- West China Hospital, Sichuan University, Chinese Cochrane Centre, Chinese EBM Centre, No. 37, Guo Xue Xiang, Chengdu, Sichuan, China.
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Hao B, Miao X, Li Y, Zhang X, Sun T, Liang G, Zhao Y, Zhou Y, Wang H, Chen X, Zhang L, Tan W, Wei Q, Lin D, He F. A novel T-77C polymorphism in DNA repair gene XRCC1 contributes to diminished promoter activity and increased risk of non-small cell lung cancer. Oncogene 2006; 25:3613-20. [PMID: 16652158 DOI: 10.1038/sj.onc.1209355] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
X-ray repair cross-complementing 1 (XRCC1) plays a key role in DNA base excision repair and cells lacking its activity are hypersensitive to DNA damage. Recently, we reported a SNP (rs3213245, -77T>C) in the XRCC1 gene 5' untranslated region (UTR) was significantly associated with the risk of developing esophageal squamous-cell carcinoma. Computer analysis predicted that this SNP was in the core of Sp1-binding motif, which suggested its functional significance. Gel shift and super shift assays confirmed that -77T>C polymorphic site in the XRCC1 promoter was within the Sp1-binding motif and the T>C substitution greatly enhanced the binding affinity of Sp1 to this region. Luciferase assays indicated that the Sp1-high-affinity C-allelic XRCC1 promoter was associated with a reduced transcriptional activity. The association between -77T>C and three other amino-acid substitution-causing polymorphisms in XRCC1 and risk of lung cancer was examined in 1024 patients and 1118 controls and the results showed that only the -77T>C polymorphism was significantly associated with an increased risk of developing lung cancer. Multivariate logistic regression analysis found that an increased risk of lung cancer was associated with the variant XRCC1 -77 genotypes (TC and CC) compared with the TT genotype (OR=1.46, 95% CI=1.18-1.82; P=0.001) and the increased risk was more pronounced in smokers (OR=1.63, 95% CI=1.20-2.21) than in non-smokers (OR=1.28, 95% CI=0.94-1.76). Taken together, these results showed that the functional SNP -77T>C in XRCC1 5'UTR was associated with cancer development owing to the decreased transcriptional activity of C-allele-containing promoter with higher affinity to Sp1 binding.
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Affiliation(s)
- B Hao
- Department of Biology Sciences and Biotechnology, Tsinghua University, Beijing, China
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Zhang G, Huang Z, Shi R, Lin Y, Hao B. Osteopontin regulation by protein kinase B (Akt) in HepG2 cells. Exp Oncol 2006; 28:36-9. [PMID: 16614705] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
AIM The mechanism responsible for osteopontin regulation is not understood in HepG2 cells. The aim of this study was to investigate the relationship between protein kinase B (Akt), a key gene in PI3K signal transduction pathway, and osteopontin expression. METHODS HepG2 cells were transfected with constitutively active Akt and dominant negative Akt using lipofectin. The Akt transfection was confirmed by Western blot analysis. Osteopontin expression was detected by both Northern blot and Western blot. RESULTS Overexpression of exogenous Akt was detected in HepG2 cells by Western blot, indicating that HepG2 cells were successfully transfected with the Akt genes. In serum-free condition, the expression of osteopontin was either low or undetectable in HepG2 cells transfected with vector only, however, the expression increased after transfection of cells with constitutively active Akt. Osteopontin expression decreased when HepG2 cells were transfected with dominant negative Akt. CONCLUSION Protein kinase B (Akt) gene regulated osteopontin expression in RNA level and protein level, suggesting that osteopontin synthesis can be blocked by inactivation of the Akt gene. This leads to a potential means of intervention for the inhibition of metastases in liver cancer.
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Affiliation(s)
- G Zhang
- Department of Gastroenterology, First Affiliated Hospital, Nanjing Medical University, China.
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Wang H, Hao B, Zhou K, Chen X, Wu S, Zhou G, Zhu Y, He F. Linkage Disequilibrium and Haplotype Architecture for two ABC Transporter Genes (ABCC1 and ABCG2) in Chinese Population: Implications for Pharmacogenomic Association Studies. Ann Hum Genet 2004; 68:563-73. [PMID: 15598215 DOI: 10.1046/j.1529-8817.2003.00124.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Information about linkage disequilibrium (LD) patterns and haplotype structures for candidate genes is instructive for the design and analysis of genetic association studies for complex diseases and drug response. ABCC1 and ABCG2 are genes coding for two multidrug resistance (MDR) associated transporters; they are also related to some pathophysiological traits. To pinpoint the LD profiles of these MDR genes in Chinese, we systemically screened 27 unrelated individuals for single nucleotide polymorphisms (SNPs) in the coding and regulatory regions of these genes, and thereby characterized their haplotype structures. Despite marked variations in haplotype diversity, LD pattern and intragenic recombination intensity between the two genes, both loci could be partitioned into several LD blocks, in which a modest number of haplotypes accounted for a high fraction of the sampled chromosomes. We concluded that each locus has its own genomic LD profile, but that they still share a common segmental LD architecture with low haplotype diversity. Our data will benefit genetic association studies of complex traits and drug response possibly related to these genes.
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Affiliation(s)
- H Wang
- Laboratory of Systems Biology, Beijing Institute of Radiation Medicine, Beijing 100850 PR China
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Hao B, Li Y, Yang Y, Wang Y, Huang F, Liao S, Wang Z, Si Y, Zhu W. [Genetic polymorphism of eight STR loci in the Han population in Henan province]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2001; 18:35-8. [PMID: 11172640] [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: 02/18/2023]
Abstract
OBJECTIVE To investigate the allele frequencies of eight short tandem repeats(STR) loci: TH01, FES, D19S400, D7S820, D16S539, D20S161, D3S1545 and D5S818 in Han population in Henan province. METHODS DNA was extracted with phenol-chloroform from EDTA-blood samples of the unrelated individuals in Henan province and amplified with PCR technique. The PCR product was analyzed with the undenatured PAGE vertical electrophoresis and silver-stain. RESULTS The authors got the frequencies of the eight loci. The heterozygosities of the eight loci are 0.66, 0.67, 0.80, 0.76, 0.79, 0.79, 0.78 and 0.78; the discrimination powers are 0.83, 0.83, 0.94, 0.91, 0.93, 0.93, 0.92 and 0.92. CONCLUSION The heterozygosities of the eight loci are high and the frequencies are in good agreement with Hardy-Weinberg equilibrium, so the eight loci can be used in individual identification testing.
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Affiliation(s)
- B Hao
- Medical Genetic Institute of Henan Province, the People's Hospital of Henan Province, Zhengzhou, Henan, 450003 P.R. China.
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Xie J, Wang X, Zhuang G, Xu H, Hao B, Tang X, Wu Q. [Relationship between interleukin-2, interleukin-2 receptor and the non-and hypo-responsiveness to hepatitis B vaccine]. Zhonghua Gan Zang Bing Za Zhi 2000; 8:332-4. [PMID: 11135687] [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: 02/18/2023]
Abstract
OBJECTIVE To study the relationship between interleukin-2 (IL-2), soluble interleukin-2 receptor (sIL-2R) and the non-and-hypo-responsiveness to hepatitis B vaccine. METHODS Peripheral blood mononuclear cells (PBMC) isolated from 21 non-and -hypo-responders, 22 hyperresponders and 21 chronic HBsAg carriers were incubated in the presence of HBsAg and phytohaemagglutinin (PHA). The levels of IL-2 and sIL-2R in the supernatants of activated cells were measured by an enzyme-linked immunosorbent assay. RESULTS The average level of IL-2 in the non-and-hypo-responders was significantly lower than that in the hyperresponders (t=8.80, P<0.001), but was comparable to that in chronic HBsAg carriers (q=0.06, P>0.5). Between the hyperresponders and the non-and-hypo-responders, the average sIL-2R levels showed no noticeable difference. CONCLUSION The results suggest that low level of IL-2 may be one of the causes and mechanisms of non-and-hypo-responsiveness to hepatitis B vaccine.
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Affiliation(s)
- J Xie
- Department of Epidemiology Xi'an Medical University, Xi'an 710061, China
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Hao B, Luo J, Yin G, Zheng C, Zheng Y. [Study on statistical method of distribution for erythrocyte morphological features by computerized image processing]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2000; 17:429-32, 443. [PMID: 11211832] [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: 02/19/2023]
Abstract
This study sought to develop a new statistic method for the semiautomatic analysis and classification of erythrocyte morphology based on the morphological features and shape analysis of erythrocytes by computer image processing. Shape factor as the description of the erythrocyte morphological features was used for the shape classification of erythrocytes. And the models and algorithms of erythrocytes image segmentation, cell body shape recognition and measure can be implemented through the VC++. The present method can efficiently and semi-automatically provide the statistical analysis of erythrocyte morphology, and can give the distribution of erythrocyte morphological features. The result showed that there was a significant difference between the distribution curves of the normal erythrocyte morphology (one apex) and hemolytic anemia's (two apices). By this way, it can be obtained the proportion data of different cell bodies' shapes. This method could provide some information for the study and diagnosis of the diseases (e.g. hemolytic anemia, pre-leukemia) related to erythrocyte morphology.
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Affiliation(s)
- B Hao
- Southwest Nationalities College, Chengdu 610041
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Hao B, Qiao W, Dong H. [The influence of conception of time - space - orientation in pre - Qin society on traditional Chinese medicine theories]. Zhonghua Yi Shi Za Zhi 2000; 30:243-6. [PMID: 11871439] [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: 02/23/2023]
Abstract
The article discusses the views of the time - space - orientation of Wuxing (Five - Evolutive Phase), Yin - yang and Sifeng (Four - Wind), and its influence on traditional Chinese medical theories. It is shown that traditional Chinese medical theories are developed and established on the basis of the science and technology and social thought of the pre - Qin period, with some contents to be further discussed, and bias would be resulted if the issue is interpreted by concepts of post - Qin period.
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Affiliation(s)
- B Hao
- Shaanxi College of Traditional Chinese Medicine, Xianyang 713083
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Abstract
The FixL heme domain serves as the dioxygen switch in the FixL/FixJ two-component system of Rhizobia. Recent structural studies of the Bradyrhizobium japonicum FixL heme domain (BjFixLH) have suggested an allosteric mechanism that is distinct from the classical hemoglobin model. To gain further insight into the FixL sensing mechanism, structures of BjFixLH bound to dioxygen, imidazole, and nitric oxide have been determined. These structures, particularly the structure of BjFixLH bound to its physiological ligand, dioxygen, have helped to address a number of important issues relevant to the BjFixLH sensing mechanism. On the basis of the oxy-BjFixLH structure, a conserved arginine is found to stabilize the dioxygen ligand in a mode reminiscent of the distal histidine in classical myoglobins and hemoglobins. The structure of BjFixLH bound to imidazole elucidates the structural requirements for accommodating sterically bulky ligands. Finally, the structure of BjFixLH bound to nitric oxide provides evidence for a structural intermediate in the heme-driven conformational change.
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Affiliation(s)
- W Gong
- Department of Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, Ohio 43210, USA
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Abstract
While protein synthesis in bacteria begins with a formylated methionine, the formyl group of the nascent polypeptide is removed by peptide deformylase. Since eukaryotic protein synthesis does not involve formylation and deformylation at the N-terminus, there has been increasing interest in peptide deformylase as a potential target for antibacterial chemotherapy. Toward this end and to aid in the design of effective antibiotics targeting peptide deformylase, the structures of the protein-inhibitor complexes of both the cobalt and the zinc containing Escherichia coli peptide deformylase bound to the transition-state analogue, (S)-2-O-(H-phosphonoxy)-L-caproyl-L-leucyl-p-nitroanilide (PCLNA), have been determined. The proteins for both deformylase-inhibitor complexes show basically the same fold as for the native enzyme. The PCLNA inhibitor adopts an extended conformation and fits nicely into a hydrophobic cavity located near the metal site. On the basis of these structures, guidelines for the design of high-affinity deformylase inhibitors are suggested. As our results show that the protein residues which interact with the PCLNA inhibitor are conserved over a wide variety of species, we suggest that antibiotics targeting deformylase could have wide applicability.
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Affiliation(s)
- B Hao
- Departments of Biochemistry and Chemistry, The Ohio State University, 484 West 12th Avenue, Columbus, Ohio 43210, USA
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Gong W, Hao B, Mansy SS, Gonzalez G, Gilles-Gonzalez MA, Chan MK. Structure of a biological oxygen sensor: a new mechanism for heme-driven signal transduction. Proc Natl Acad Sci U S A 1998; 95:15177-82. [PMID: 9860942 PMCID: PMC28016 DOI: 10.1073/pnas.95.26.15177] [Citation(s) in RCA: 264] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The FixL proteins are biological oxygen sensors that restrict the expression of specific genes to hypoxic conditions. FixL's oxygen-detecting domain is a heme binding region that controls the activity of an attached histidine kinase. The FixL switch is regulated by binding of oxygen and other strong-field ligands. In the absence of bound ligand, the heme domain permits kinase activity. In the presence of bound ligand, this domain turns off kinase activity. Comparison of the structures of two forms of the Bradyrhizobium japonicum FixL heme domain, one in the "on" state without bound ligand and one in the "off" state with bound cyanide, reveals a mechanism of regulation by a heme that is distinct from the classical hemoglobin models. The close structural resemblance of the FixL heme domain to the photoactive yellow protein confirms the existence of a PAS structural motif but reveals the presence of an alternative regulatory gateway.
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Affiliation(s)
- W Gong
- Department of Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210, USA
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Abstract
Protein synthesis in bacteria involves the formylation and deformylation of the N-terminal methionine. As eukaryotic organisms differ in their protein biosynthetic mechanisms, peptide deformylase, the bacterial enzyme responsible for deformylation, represents a potential target for antibiotic studies. Here we report the crystallization and 2.9 A X-ray structure solution of the zinc containing Escherichia coli peptide deformylase. While the primary sequence, tertiary structure, and use of coordinated cysteine suggest that E. coli deformylase belongs to a new subfamily of metalloproteases, the environment around the metal appears to have strong geometric similarity to the active sites of the thermolysin family. This suggests a possible similarity in their hydrolytic mechanisms. Another important issue is the origin of the enzyme's specificity for N-formylated over N-acetylated substrates. Based on the structure, the specificity appears to result from hydrogen-bonding interactions which orient the substrate for cleavage, and steric factors which physically limit the size of the N-terminal carbonyl group.
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Affiliation(s)
- M K Chan
- Department of Biochemistry, Ohio State University, Columbus 43210, USA.
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Wu H, Hao B, Tang G, Lin Y. [Isolation and determination of the seeds of Pachyrrhizus errosus protein by high performance gel filtration chromatography (GFC)]. Se Pu 1997; 15:153-5. [PMID: 15739408] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
From the seeds of Pachyrrhizus errosus, three protein constituents, namel PE1, PE2 and PE3, have been isolated and purified by extraction with 5mmol/L phosphate saline (0.9% NaCl) buffer (PB) at pH 7.2, and S-Sepharose Fast Flow Column (2.6cm x 15cm) chromatography which eluted with 5mmol/L phosphate buffer (pH 7.0) containing 1mmol/L NaCl. Three proteins were burther separated on two connected Protein-Pak 60+Protein-Pak 125 [7.5mm x 39cm, 10microm] columns with mobile phase of 0.2mol/L phosphate buffer (pH 6.5). The flow rate was kept constant at 0.8mL/min by YSB-2 type high press pump. The effluent was monitored at a wavelength of 280nm on photodiode array detector. These three proteins are proved to be homogeneous by SDS-PAGE, IEF and HPGFC experiments, and all present the typical absorption spectra in ultraviolet region. The moleculer weights of the three proteins are approxiamtely 33000D, 14500D and 14000D respectively by SDS-PAGE. But as using HPGFC analysis, the MW value of PE2 is 28000D. This indicates PE2 may be composed of two chains joined by disulfide bond, which is further proved from the latter amino acid composition analysis. The isoelectric points of three proteins are 4.5, 6.5 and 7.5 respectively by using IEF. The amion acids compositions of the three proteins were determined with OPA post-column derivatization/fluorescence detection.
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Affiliation(s)
- H Wu
- Fujan Institute of Research on the Structure of Matter, the Chinese Academy of Sciences, Fuzhou, 350002
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41
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Abstract
Crystals of a protein extracted from the seeds of Pachyrrhizus erosus have been obtained by vapor-phase diffusion. The crystal belongs to the space group P4(1)2(1)2 or P4(3)2(1)2 with cell parameters a = b = 62.52, c = 147.42 A. There is one protein molecule of 33 kDa in an asymmetric unit. A data set at 3.1 A has been collected on an area detector.
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Affiliation(s)
- Y Lin
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
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Hao B. [My new opinion on the date of writing of the "Seven Grand Chapters" in Internal Classics of Yellow Emperor: exploration based on the origin and evolution of the historical materials of ancient records on astronomy, classical music and calendar] (Chi). Zhonghua Yi Shi Za Zhi 1984; 14:46-50. [PMID: 11611495] [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: 02/21/2023]
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44
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Hao B, Hsu K. [The birefringence properties of the myelin shealth of shrimp nerve fibre]. Sheng Li Xue Bao 1965; 28:373-7. [PMID: 5178771] [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: 01/14/2023]
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