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Li ZH, Kong T, Dunne EM, Liu M, Chang JS, Zhang TW, Chan M, McDermott R. Examining the Efficacy and Safety Profile of Palliative Radiotherapy Using 30 Gy in 5 Fractions. Int J Radiat Oncol Biol Phys 2023; 117:e129. [PMID: 37784686 DOI: 10.1016/j.ijrobp.2023.06.926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Higher biological equivalent doses of radiotherapy (RT) can improve symptom palliation and local control in select tumor sites. However, not all patients meet criteria for treatment with stereotactic ablative radiotherapy (SABR). Furthermore, SABR is a resource intensive technique which may limit its use in many centers. The 30 Gray in 5 fractions regimen (30/5) stems from a modification of 5-fraction SABR regimens. It is a conformal, homogenous hypo-fractionated regimen that delivers higher dose than conventional palliative RT while still respecting the normal tissue constraints for 5-fraction SABR. It uses streamlined contouring and planning with less stringent requirements for immobilization and image guidance, compared to what is required for SABR. This study evaluates the clinical outcomes of patients receiving 30/5. MATERIALS/METHODS A single institution retrospective review of clinical and treatment data was performed for patients who received 30/5 from October 2020 to August 2022. Local control (LC) was calculated for all treatment courses. Distant metastasis-free survival (DMFS), progression-free survival (PFS), and overall survival (OS) were calculated for all patients. Survival analyses were analyzed by the Kaplan-Meier method and curves compared by log-rank test. Univariate and multivariate analyses were performed using cox-regression analysis. RESULTS A total of 77 patients and 92 courses of 30/5 were available for analysis. The most common primary tumor was lung (44%), followed by gastrointestinal (GI; 20%), breast (10%), and genitourinary (10%). The median age of patients was 64 years (range: 37-93). The median tumor size treated was 11.4 cm^3 (range: 0.3 - 210.9 cm^3). Treatment sites included lung (31%), lymph nodes (22%), non-spine bone (20%), and spine (15%). At median follow-up of 10.1 months (mo), 25 deaths occurred. Median LC after receiving 30/5 was 18.5 mo (95% CI: 15.7-21.3 mo), median DMFS was 6.6 months (95% CI: 4.6-8.6 mo), median PFS was 6.4 mo (95% CI: 4.9-8.0 mo), and median OS was 18.1 mo (95% CI: 13.1-23.1 mo). Median time to initiating, restarting, or changing systemic therapy was 12.8 mo (95% CI: 7.6-18.0 mo). Radiosensitive (lung, prostate, breast, gynecological, and head/neck) tumors had better LC than radioresistant (GI, renal cell, sarcoma, melanoma) tumors (median 20.9 vs 12.1 mo, p < 0.02). Six grade 2 toxicities occurred (6.5% of all treatments). No grade 3 or higher toxicities occurred. CONCLUSION The 30/5 regimen is a safe, well-tolerated, and resource efficient regimen with effective local control. This may serve as a practical alternative for patients who require palliative RT but not optimal candidates for SABR. As expected, radiosensitive tumors had better local control than radioresistant tumors. Future research can further explore the safety, efficacy, and indications of 30/5 as a palliative RT option.
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Affiliation(s)
- Z H Li
- BC Cancer Vancouver, Vancouver, BC, Canada
| | - T Kong
- BC Cancer Vancouver, Vancouver, BC, Canada
| | - E M Dunne
- BC Cancer Vancouver, Vancouver, BC, Canada
| | - M Liu
- BC Cancer Vancouver, Vancouver, BC, Canada
| | - J S Chang
- BC Cancer Vancouver, Vancouver, BC, Canada; Yonsei Cancer Center, Seoul, Korea, Republic of (South) Korea
| | - T W Zhang
- BC Cancer Vancouver, Vancouver, BC, Canada
| | - M Chan
- BC Cancer Vancouver, Vancouver, BC, Canada
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Zhang TW, Wu DL, Li WD, Hao ZH, Wu XL, Xing YJ, Shi JR, Li Y, Dong F. Occurrence of Fusarium mycotoxins in freshly harvested highland barley (qingke) grains from Tibet, China. Mycotoxin Res 2023:10.1007/s12550-023-00487-1. [PMID: 37237114 DOI: 10.1007/s12550-023-00487-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
Highland barley, also called "qingke" in Tibetan, is mainly cultivated in the Tibetan Plateau of China and has been used as a major staple food for Tibetans. Recently, Fusarium head blight (FHB) of qingke was frequently observed around the Brahmaputra River in Tibet. Considering the importance of qingke for Tibetans, the assessment of Fusarium mycotoxin contamination is essential for food safety. In this study, a total of 150 freshly harvested qingke grain samples were obtained from three regions around the Brahmaputra River in Tibet (China) in 2020. The samples were investigated for the occurrence of 20 Fusarium mycotoxins using high-performance liquid chromatography-tandem mass spectrometry (HPLC‒MS/MS). The most frequently occurring mycotoxin was enniatin B (ENB) (46%), followed by enniatin B1 (ENB1) (14.7%), zearalenone (ZEN) (6.0%), enniatin A1 (ENA1) (3.3%), enniatin A (ENA) (1.3%), beauvericin (BEA) (0.7%), and nivalenol (NIV) (0.7%). Due to the increase in altitude, the cumulative precipitation level and average temperature decreased from the downstream to the upstream of the Brahmaputra River; this directly correlated to the contamination level of ENB in qingke, which gradually decreased from downstream to upstream. In addition, the level of ENB in qingke obtained from qingke-rape rotation was significantly lower than that from qingke-wheat and qingke-qingke rotations (p < 0.05). These results disseminated the occurrence of Fusarium mycotoxins and provided further understanding of the effect of environmental factors and crop rotation on Fusarium mycotoxins.
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Affiliation(s)
- T W Zhang
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China
| | - D L Wu
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China
| | - W D Li
- College of Food Science, Xizang Agricultural and Animal Husbandry University, Linzhi, 860000, People's Republic of China
| | - Z H Hao
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China
| | - X L Wu
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China
| | - Y J Xing
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China
| | - J R Shi
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China
| | - Y Li
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China.
- College of Food Science, Xizang Agricultural and Animal Husbandry University, Linzhi, 860000, People's Republic of China.
| | - F Dong
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China.
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Zhang TW, Wei Y, Pan J, Fang BW, Ye DW, Zhu Y. [Clinical features and prognostic value of TP53 mutation in Chinese prostate cancer patients]. Zhonghua Wai Ke Za Zhi 2021; 59:897-901. [PMID: 34743450 DOI: 10.3760/cma.j.cn112139-20210715-00312] [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 examine the clinical features and prognostic value of TP53 mutation in circulating tumor DNA(ctDNA) of Chinese prostate cancer patients. Methods: A prospective cohort of 239 prostate cancer patients diagnosed in the Department of Urology, Fudan University Shanghai Cancer Center from May 2018 to June 2019 was included. The age of diagnosis was(65.4±7.6) years(range: 45 to 85 years). Clinical data were collected from patient diagnosis and treatment records as well as follow-up surveys. TP53 mutations in plasma were detected by target sequence capture and second-generation sequencing. The relationship between TP53 mutation status and progression-free survival(PFS) was analyzed in patients who received any treatment lines. Kaplan-Meier analysis was performed in different subgroups, survival curves were drawn, and Log-rank test was used for comparison. Cox regression models were used to estimate multivariate adjusted HR and 95%CI associated with PFS. Results: In the cohort, 15.9%(38/239) patients had TP53 mutation. Patients with TP53 mutations had a higher rate of metastases initially diagnosed with prostate cancer (78.9% (30/38) vs. 60.2% (121/201), χ²=4.829, P=0.028), as well as a higher rate of castration resistance (68.4% (26/38) vs. 42.8% (86/201), χ²=8.434, P=0.004). Kaplan-Meier analysis revealed a median androgen-deprivation therapy-PFS of 13.0 months in patients with TP53 mutation and 17.0 months in patients with TP53 wild-type. The median abiraterone-PFS was 4.7 months for patients with TP53 mutation and 11.0 months for TP53 wild-type patients. The median docetaxel-PFS was 3.0 months in patients with TP53 mutation and 5.0 months in patients with TP53 wild-type. TP53 mutation was the undependent prognosis factor of PFS in patients treated with abiraterone(HR=2.23, 95%CI: 1.26 to 3.94, P=0.006) and docetaxel(HR=1.92, 95%CI: 1.01 to 3.66, P=0.047) had significant differences in PFS. Conclusions: TP53 mutations were associated with the presence of metastasis and castration resistance, and were also an independent prognostic factor for progression-free survival in patients treated with abiraterone and docetaxel.
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Affiliation(s)
- T W Zhang
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Y Wei
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - J Pan
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - B W Fang
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - D W Ye
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Y Zhu
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
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Zhang TW, Guo WW, Wang XM, Mao LQ, Zhang RY. [The value of adenosine triphosphate in CD4(+)T lymphocytes in predicting repeated respiratory tract infections in silicosis patients]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 38:915-918. [PMID: 33406552 DOI: 10.3760/cma.j.issn.121094-20200506-00236] [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] [Indexed: 11/05/2022]
Abstract
Objective: To explore the value of the concentration of adenosine triphosphate (ATP) in CD4(+)T lymphocytes in predicting repeated respiratory tract infections (RRTI) in silicosis patients. Methods: In April 2020, 614 silicosis patients admitted from March 2016 to March 2018 were included in the study, and they were divided into the RRTI group (n=105) and the non RRTI group (n=509) according to whether the occurrence of RRTI, another 30 healthy cases taken from body check were served as control group, and the concentrations of ATP produced by CD4(+)T lymphocytes was measured by ImmuKnow assay, and were compared between the three groups. And drawed the receiver operating characteristic (ROC) curve, and the Logistic regression analysis was used to explore the risk factors of RRTI. Results: The incidence of RRTI in silicosis patients was 17.10% (105/614) . The concentration of ATP produced by CD4(+)T lymphocytes in the RRTI group [ (260.42±90.36) mg/L] was significantly lower than that in the non RRTI group [ (413.66±138.74) mg/L] (t=-10.849, P<0.01) . The area under the ROC curve was 0.834, the cutoff value was 284 mg/L, the sensitivity was 0.88, and the specificity was 0.83. Logistic regression analysis showed that the concentration of ATP produced by CD4(+)T lymphocytes≤284 mg/L, impaired pulmonary ventilation function, serum albumin<40 g/L and diabetes were the risk factors of RRTI in silicosis patients (OR=2.126, 1.217, 1.164, 1.125, P<0.05) . Conclusion: Low CD4(+)T lymphocyte ATP value was a risk factor of RRTI in silicosis patients, and can predict the risk of RRTI in patients with silicosis.
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Affiliation(s)
- T W Zhang
- Department of Respiratory Medicine, the First People's Hospital of Taizhou, Taizhou 318020, China
| | - W W Guo
- Department of Respiratory Medicine, the First People's Hospital of Taizhou, Taizhou 318020, China
| | - X M Wang
- Department of Respiratory Medicine, the First People's Hospital of Taizhou, Taizhou 318020, China
| | - L Q Mao
- Department of Respiratory Medicine, the First People's Hospital of Taizhou, Taizhou 318020, China
| | - R Y Zhang
- Department of Respiratory Medicine, the First People's Hospital of Taizhou, Taizhou 318020, China
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Abstract
In recent years, the research of spatiotemporal clustering of disease is attracting more and more attention, which plays an important role in understanding the temporal and spatial distribution characteristics of diseases, and can provide references for the etiology exploration and prevention and control of diseases. In order to better understand the research methods of spatiotemporal clustering of diseases and its application progress, this paper summarizes the statistical methods commonly used in relevant researches at demestic and abroad from three aspects of temporal clustering, spatial clustering and spatiotemporal clustering of diseases.
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Affiliation(s)
- J J Lin
- Department of Epidemiology and Biostatistics, Zhejiang University, Hangzhou 310058, China
| | - T W Zhang
- Department of Epidemiology and Biostatistics, Zhejiang University, Hangzhou 310058, China
| | - X Y Li
- Department of Epidemiology and Biostatistics, Zhejiang University, Hangzhou 310058, China
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Zhang JN, Song FQ, Zhou SN, Zheng H, Peng LY, Zhang Q, Zhao WH, Zhang TW, Li WR, Zhou ZB, Lin JX, Chen F. [Analysis of single-nucleotide polymorphism of Sonic hedgehog signaling pathway in non-syndromic cleft lip and/or palate in the Chinese population]. Beijing Da Xue Xue Bao Yi Xue Ban 2019; 51:556-563. [PMID: 31209431 DOI: 10.19723/j.issn.1671-167x.2019.03.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To study the relationship between Sonic hedgehog (Shh) associated single-nucleotide polymorphism (SNP) and non-syndromic cleft lip and/or palate (NSCL/P), and to explore the risk factors of cleft lip and/or palate. Many studies suggest that the pathogenesis of NSCL/P could be related to genes that control early development, in which the Shh signaling pathway plays an important role. METHODS Peripheral blood was collected from 197 individuals (100 patients with NSCL/P and 97 healthy controls). Haploview software was used for haplotype analysis and Tag SNP were selected, based on the population data of Han Chinese in Beijing of the international human genome haplotype mapping project. A total of 27 SNP were selected for the 4 candidate genes of SHH, PTCH1, SMO and GLI2 in the Shh signaling pathway. The genotypes of 27 SNP were detected and analyzed by Sequenom mass spectrometry. The data were analyzed by chi-squared test and an unconditional Logistic regression model. RESULTS The selected SNP basically covered the potential functional SNP of the target genes, and its minimum allele frequency (MAF) was >0.05: GLI2 73.5%, PTCH1 91.0%, SMO 100.0%, and SHH 75.0%. It was found that the genotype frequency of SNP (rs12674259) located in SMO gene and SNP (rs2066836) located in PTCH1 gene were significantly different between the NSCL/P group and the control group. Linkage disequilibrium was also found on 3 chromosomes (chromosomes 2, 7 and 9) where the 4 candidate genes were located. However, in the analysis of linkage imbalance haplotype, there was no significant difference between the disease group and the control group. CONCLUSION In China, NSCL/P is the most common congenital disease in orofacial region. However, as it is a multigenic disease and could be affected by multiple factors, such as the external environment, the etiology of NSCL/P has not been clearly defined. This study indicates that Shh signaling pathway is involved in the occurrence of NSCL/P, and some special SNP of key genes in this pathway are related to cleft lip and/or palate, which provides a new direction for the etiology research of NSCL/P and may provide help for the early screening and risk prediction of NSCL/P.
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Affiliation(s)
- J N Zhang
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - F Q Song
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - S N Zhou
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - H Zheng
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - L Y Peng
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - Q Zhang
- Department of Center Laboratory, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - W H Zhao
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou 510000, China
| | - T W Zhang
- Department of Orthodontics, Yantai Stomatological Hospital, Yantai 264000, Shandong, China
| | - W R Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - Z B Zhou
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - J X Lin
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - F Chen
- Department of Center Laboratory, Peking University School and Hospital of Stomatology, Beijing 100081, China
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Zhang TW, Rodrigues GB, Louie AV, Palma D, Dar AR, Dingle B, Kocha W, Sanatani M, Yaremko B, Yu E, Younus J, Vincent MD. Phase I study of concurrent and consolidation cisplatin and docetaxel chemotherapy with thoracic radiotherapy in non-small cell lung cancer. Curr Oncol 2018; 25:22-31. [PMID: 29507480 DOI: 10.347/co.25.3657] [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] [Indexed: 11/20/2022]
Abstract
Background We designed a phase i study of concurrent chemoradiotherapy (ccrt) with docetaxel (D) and cisplatin (C), followed by consolidation dc, for unresectable stage iii non-small cell lung cancer (nsclc). Methods Patients with histologically proven and unresectable stage iii nsclc were eligible. During ccrt, C was given every 3 weeks (75 mg/m2) and D given weekly. The starting dose of D was 20 mg/m2, escalated in cohorts of 3 to define the maximum tolerated dose (mtd). Radiotherapy was prescribed to a dose of 60 Gy in 30 fractions. This was followed by 2 cycles of consolidation dc, which were dose escalated if ccrt was tolerated. Results Twenty-six patients were enrolled, with 1 excluded following evidence of metastatic disease. Nineteen patients completed both phases of treatment. There were 7 grade 3 events during ccrt (5 esophagitis, 2 nausea), and 8 grade 3 events during consolidation (2 neutropenia, 2 leukopenia, 1 esophagitis, 2 nausea, and 1 pneumonitis). Three patients had grade 4 neutropenia. No patients died due to toxicities. The mtd of concurrent weekly D was 20 mg/m2. Consolidation D and C were each dose escalated to 75 mg/m2 in 8 patients. The median overall survival (os) and progression-free survival (pfs) of all patients were 33.6 months and 17.2 months, respectively, with median follow-up of 26.6 months (range 0.43-110.8). Conclusions The use of docetaxel 20 mg/m2 weekly and cisplatin 75 mg/m2 every 3 weeks concurrent with thoracic radiotherapy, followed by consolidation docetaxel and cisplatin, both given at 75 mg/m2 every 3 weeks, appears to be safe in this phase i trial.
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Affiliation(s)
- T W Zhang
- Department of Oncology, London Regional Cancer Program, London, ON
| | - G B Rodrigues
- Department of Oncology, London Regional Cancer Program, London, ON
| | - A V Louie
- Department of Oncology, London Regional Cancer Program, London, ON
| | - D Palma
- Department of Oncology, London Regional Cancer Program, London, ON
| | - A R Dar
- Department of Oncology, London Regional Cancer Program, London, ON
| | - B Dingle
- Department of Oncology, London Regional Cancer Program, London, ON
| | - W Kocha
- Department of Oncology, London Regional Cancer Program, London, ON
| | - M Sanatani
- Department of Oncology, London Regional Cancer Program, London, ON
| | - B Yaremko
- Department of Oncology, London Regional Cancer Program, London, ON
| | - E Yu
- Department of Oncology, London Regional Cancer Program, London, ON
| | - J Younus
- Department of Oncology, London Regional Cancer Program, London, ON
| | - M D Vincent
- Department of Oncology, London Regional Cancer Program, London, ON
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Liu YN, Tao S, Dou H, Zhang TW, Zhang XL, Dawson R. Exposure of traffic police to Polycyclic aromatic hydrocarbons in Beijing, China. Chemosphere 2007; 66:1922-8. [PMID: 16996563 DOI: 10.1016/j.chemosphere.2006.07.076] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 07/11/2006] [Accepted: 07/26/2006] [Indexed: 05/11/2023]
Abstract
Exposure of on-duty traffic police in Beijing to polycyclic aromatic hydrocarbons (PAHs) was investigated during the summer, 2004 using a personal sampling technique in measuring both particulate and gaseous phase PAHs. The results were then compared with those from two control sites away from the street. Exposure levels to gaseous and particulate PAHs for the traffic police were found to be 1525 +/- 759 ngm(-3) and 148 +/- 118 ngm(-3), respectively, representing 2-2.5 times higher levels than those at the control sites. The daily inhalation exposure of the police was estimated to be 277 ngkg(-1)d(-1). Most of the PAHs exposure came from the vapor phase, particularly NAP, FLO and PHE. Based on calculated PAH diagnostic ratios, the major source of PAHs exposure was from vehicle exhaust. The effects of temperature, humidity and atmospheric stability on exposure levels are also discussed.
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Affiliation(s)
- Y N Liu
- Laboratory for Earth Surface Processes, College of Environmental Sciences, Peking University, Beijing 100871, China
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Zhang TW, Wang XB, Jiang F. Implication to mantle-derived CO2 in natural gases of huanghua depression using helium and argon isotope tracer. Chin Sci Bull 1998. [DOI: 10.1007/bf02891655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhang TW, Wang WC, Ou SH. [Lymphoepithelial lesion of the minor salivary gland: Report of 2cases]. Shanghai Kou Qiang Yi Xue 1995; 4:157. [PMID: 15160080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- T W Zhang
- Department of Dentistry, People's Hospital of Jiangshan City. Zhejiang 324100,China
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