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652 results on '"Zheng, Heping"'

3. Pay-it-forward gonorrhea and chlamydia testing among men who have sex with men and male STD patients in China: the PIONEER pragmatic, cluster randomized controlled trial protocol

Author

Marley, Gifty, Tan, Rayner Kay Jin, Wu, Dan, Wang, Tong, Sun, Murong, Sheng, Qilei, Holly, Margaret Elizabeth, Hlatshwako, Takhona Grace, Wang, Cheng, Tang, Weiming, Ramaswamy, Rohit, Yang, Ligang, Luo, Danyang, Sylvia, Sean S., Gray, Kurt, Van Duin, David, Zheng, Heping, and Tucker, Joseph D.

Published
2023
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23. Quantitative evaluation of an innovation contest to enhance a sexual health campaign in China

Author

Zhang, Ye, Tang, Songyuan, Li, Katherine, Tso, Lai Sze, Bayus, Barry L, Glidden, David, Yang, Bin, Zheng, Heping, Wei, Chongyi, Tucker, Joseph, and Tang, Weiming

Subjects
Health Services and Systems, Public Health, Health Sciences, Infectious Diseases, Behavioral and Social Science, Clinical Research, Good Health and Well Being, Adolescent, Adult, Aged, Aged, 80 and over, China, Crowdsourcing, Evaluation Studies as Topic, Female, Health Education, Health Promotion, Humans, Male, Middle Aged, Organizational Innovation, Quality Improvement, Sexual Behavior, Sexual Health, Young Adult, Innovation contest, Public health campaign, Sexual health, Microbiology, Clinical Sciences, Medical Microbiology, Clinical sciences, Medical microbiology, Public health
Abstract

BackgroundCrowdsourcing method is an excellent tool for developing tailored interventions to improve sexual health. We evaluated the implementation of an innovation contest for sexual health promotion in China.MethodsWe organized an innovation contest over three months in 2014 for Chinese individuals

Published
2019

41. Chlamydial protease-like activating factor targets SLC7A11 for degradation to induce ferroptosis and facilitate dissemination.

Author

Chen, Wentao, primary, Su, Xin, additional, Pan, Yuying, additional, Xue, Yaohua, additional, Zeng, Lihong, additional, Xu, Qingqing, additional, Yu, Xueying, additional, Yin, Xiaona, additional, Zhou, Han, additional, Feng, Zhanqin, additional, Zhang, Bao, additional, Zhao, Wei, additional, and Zheng, Heping, additional

Published
2023
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43. Study on the influence of polar groups in pour point depressant on flow properties of Karamay crude oil.

Author

Zou, Yongxin, Zheng, Heping, Luo, Xiaowen, and Tang, Jianhua

Subjects
*PETROLEUM, *POINT set theory, *MOLECULAR structure, *PETROLEUM industry, *CONTACT angle
Abstract

Pour point depressant (PPD) is a crucial addition in the petroleum industry which can significantly enhance the flow properties of crude oil by preventing wax from precipitating out of it. The flow assurance effect of PPD on crude oil is impacted by its molecular structure. As a result, we concentrate on the PPD with various molecular structures, such as carboxyl and benzene rings, to investigate its impact on the flow behavior of crude oil. Then, FTIR and contact angle test were used to describe the characteristics of PPD (SAF-n and SAFS-m). The Karamay crude oil was tested using the following items: pour point, rheology, viscosity, viscoelasticity, and POM. When the crude oil was treated with 1000 ppm SAFS-1, the pour point decreased from 12 to −14 °C and the viscosity decreased from 40.1 to 6.3 pa·s at 0 °C. Meanwhile, the results show that the more variety polar groups PPD has, the more its dispersion increases and the stronger its interactions with crude oil are when its molar ratio of non-polar groups are suitable. These effects may be caused by the PPD changing the crystallization characteristics of wax and the aggregate state of resin and asphalt. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Male Clients of Male Sex Workers in China

Author

Chen, Lei, Mahapatra, Tanmay, Fu, Gengfeng, Huang, Shujie, Zheng, Heping, Tucker, Joseph D, Yang, Bin, Zhao, Jinkou, Detels, Roger, and Tang, Weiming

Subjects
Biomedical and Clinical Sciences, Public Health, Health Sciences, Clinical Sciences, Behavioral and Social Science, Prevention, Clinical Research, HIV/AIDS, Sexually Transmitted Infections, Infection, Adult, China, Condoms, Cross-Sectional Studies, HIV Infections, Homosexuality, Male, Humans, Male, Malocclusion, Safe Sex, Sex Workers, Syphilis, Young Adult, clients, syphilis, HIV, men who have sex with men, male sex workers, Public Health and Health Services, Virology, Clinical sciences, Epidemiology, Public health
Abstract

BackgroundThere is a high prevalence of HIV/syphilis among male sex workers, but no formal study has ever been conducted focusing on male clients of male sex workers (MCM). A detailed investigation was thus called for, to determine the burden and sociobehavioral determinants of HIV and syphilis among these MCM in China.MethodsAs part of a multicenter cross-sectional study, using respondent-driven and snowball sampling, 2958 consenting adult men who have sex with men (MSM) were recruited, interviewed, and tested for HIV and syphilis between 2008 and 2009. The distributions of sociodemographic characteristics, risk behaviors, and HIV/syphilis prevalence were determined and compared between MCM and other MSM.ResultsAmong recruited MSM, 5.0% (n = 148) were MCM. HIV prevalences for MCM and other MSM were 7.4% and 7.7%, whereas 18.9% and 14.0% were positive for syphilis, respectively. Condomless anal intercourse (CAI) was reported by 59.5% of MCM and 48.2% of MSM. Multiple logistic regression revealed that compared with other MSM, MCM were more likely to have less education [for ≤ elementary level, adjusted odds ratio (aOR) = 3.13, 95% confidence interval (95% CI): 1.42 to 6.90], higher income (for >500 US Dollars per month, aOR = 2.97, 95% CI: 1.53 to 5.77), more often found partners at parks/restrooms (aOR = 4.01, 95% CI: 2.34 to 6.85), reported CAI (aOR = 1.49, 95% CI: 1.05 to 2.10), reported a larger sexual network (for ≥ 10, aOR = 2.70, 95% CI: 1.44 to 5.07), and higher odds of syphilis (aOR = 1.54, 95% CI: 1.00 to 2.38).ConclusionsThe greater frequency of risk behaviors and high prevalence of HIV and syphilis indicated that HIV/syphilis prevention programs in China need to pay special attention to MCM as a distinct subgroup, which was completely ignored until date.

Published
2016

50. Male Clients of Male Sex Workers in China: An Ignored High-Risk Population.

Author

Chen, Lei, Mahapatra, Tanmay, Fu, Gengfeng, Huang, Shujie, Zheng, Heping, Tucker, Joseph D, Yang, Bin, Zhao, Jinkou, Detels, Roger, and Tang, Weiming

Subjects
Humans, Syphilis, HIV Infections, Malocclusion, Cross-Sectional Studies, Condoms, Safe Sex, Homosexuality, Male, Adult, China, Male, Young Adult, Sex Workers, clients, syphilis, HIV, men who have sex with men, male sex workers, Homosexuality, Virology, Clinical Sciences, Public Health and Health Services
Abstract

BackgroundThere is a high prevalence of HIV/syphilis among male sex workers, but no formal study has ever been conducted focusing on male clients of male sex workers (MCM). A detailed investigation was thus called for, to determine the burden and sociobehavioral determinants of HIV and syphilis among these MCM in China.MethodsAs part of a multicenter cross-sectional study, using respondent-driven and snowball sampling, 2958 consenting adult men who have sex with men (MSM) were recruited, interviewed, and tested for HIV and syphilis between 2008 and 2009. The distributions of sociodemographic characteristics, risk behaviors, and HIV/syphilis prevalence were determined and compared between MCM and other MSM.ResultsAmong recruited MSM, 5.0% (n = 148) were MCM. HIV prevalences for MCM and other MSM were 7.4% and 7.7%, whereas 18.9% and 14.0% were positive for syphilis, respectively. Condomless anal intercourse (CAI) was reported by 59.5% of MCM and 48.2% of MSM. Multiple logistic regression revealed that compared with other MSM, MCM were more likely to have less education [for ≤ elementary level, adjusted odds ratio (aOR) = 3.13, 95% confidence interval (95% CI): 1.42 to 6.90], higher income (for >500 US Dollars per month, aOR = 2.97, 95% CI: 1.53 to 5.77), more often found partners at parks/restrooms (aOR = 4.01, 95% CI: 2.34 to 6.85), reported CAI (aOR = 1.49, 95% CI: 1.05 to 2.10), reported a larger sexual network (for ≥ 10, aOR = 2.70, 95% CI: 1.44 to 5.07), and higher odds of syphilis (aOR = 1.54, 95% CI: 1.00 to 2.38).ConclusionsThe greater frequency of risk behaviors and high prevalence of HIV and syphilis indicated that HIV/syphilis prevention programs in China need to pay special attention to MCM as a distinct subgroup, which was completely ignored until date.

Published
2016

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