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Assessment on the Effects of Hepatitis B Prevention and Control Measures in Western China:A Comparison of Three Population-based Serosurveys

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Biomedical and Environmental Sciences 2020年第10期33卷 735-744页

作者： CHEN Hui LIU Nan JI Zhao Hua pu zhong shu GUO Zhi Wen GAO Jie SHAO zhong Jun LIU Yi Wen YAN Yong Ping Department of Epidemiology School of Public HealthAir Force Medical UniversityXi'an 710032ShaanxiChina Wuwei municipal Center for Disease Control and Prevention Wuwei 733000GansuChina

Objective Despite the remarkable progress in efforts to control disease spread,the nationwide elimination of hepatitis B in China is still hindered by the persistently high rate of hepatitis B virus(HBV)infection in Western *** study aimed to evaluate the strategy of hepatitis B prevention and control in Western China and identify potential areas and strategies for *** Susceptible population vaccination,health education,professional training of doctors,and other prevention and control measures have been implemented in Wuwei city since *** were obtained from three representative cross-sectional serosurveys conducted in 2010,2013,and *** serum samples were subjected to enzyme-linked immunosorbent assays to detect the following seromarkers:HBV surface antigen(HBsAg),antibody against hepatitis B surface antigen(anti-HBs),and antibody against hepatitis B core antigen(anti-HBc).Estimates of variance were determined using Taylor series linearization *** The three serosurveys revealed decreases in the prevalence of HBsAg(7.19% in 2010 vs.6.51% in 2013 vs.5.87% in 2015)and anti-HBc positivity(43.89%vs.32.87%vs.28.46%)and an increase in the prevalence of anti-HBs positivity(49.07%vs.53.66%vs.53.72%)over *** 2010 to 2015,the legally reported incidence of hepatitis B in Wuwei city decreased from 686.53/100,000 to 53.72/100,***,persistently high HBsAg-positive rates(above 5.40%)were observed among subjects aged 20–69 years old in the three serosurveys;the prevalence of HBsAg was above 1% among children younger than 10 years ***,rural subjects had higher rates of HBsAg and anti-HBc positivity than their urban counterparts(6.04%vs.4.83% and 30.26%vs.20.35%,respectively)in 2015 but had a lower rate of anti-HBs positivity(49.68 vs.55.18%).Multivariate regression analysis showed that age,urban and rural areas,and education level were the main factors affecting HBV *** Although vaccine-based preve

关键词： Hepatitis B Prevention a n d control measures Serosurvey Western China

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Enantioselective reductive conjugate alkenylation of α,β-enones with keto alkenyl acetates by nickel catalysis

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Science China Chemistry 2025年第1期68卷 157-162页

作者： Rong-De He Yun-Lei Luo Qiu-Quan Pan Qi-Wei Yao Xing-zhong shu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University

Reactions involving alkenyl acetates offer cost-effective and environmentally friendly routes for alkene synthesis, yet their asymmetric variant remains elusive. Concurrently, asymmetric conjugate alkenylation predominantly centered on nucleophilic addition using alkenyl–M. This manuscript presents an asymmetric reductive conjugate alkenylation reaction involving alkenyl acetates. The method facilitates the enantioselective addition of keto alkenyl groups to α,β-enones, resulting in the formation of unsaturated diketones—a class of useful structural motifs that are challenging to access otherwise. The use of electron-rich Pyroxy ligand is essential for achieving both high reaction efficiency and enantioselectivity.

关键词： nickel alkenylation asymmetric cross-coupling alkenes

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Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

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Science China Chemistry 2025年第1期68卷 192-200页

作者： Dongying Wang shulan pu Yongmin Chen Ke Lei Yujie Duan Linjiao Mao Xuhui Zeng Xi Luo Yuntao Zhang Yuqin Dong Jin zhong Zhang Yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

关键词： photocatalysis hydrogen peroxide oxygen reduction reaction potassium doping cyano group

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Chiral phosphoramidite ligand-modulated palladium auto-tandem catalysis for asymmetric dehydrogenative dienylation of imines with α-alkenes

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Science China Chemistry 2025年

作者： zhong-Sheng Nong Hao-Fan Qian Ying-Chun Chen pu-Sheng Wang Liu-Zhu Gong Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of China Key Laboratory of Drug Targeting and Drug Delivery System (Sichuan University) Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University School of Materials and Chemistry Southwest University of Science and Technology

The development of efficient processes allowing rapid access to complex chiral molecules from easily available alkenes is a long-term pursuit in the synthetic chemistry community. Transition metal-catalyzed asymmetric functionalization of allylic C–H bond represents a unique alternative toward this goal. However, enantioselective dehydrogenative transformation of olefins to value-added optically enriched molecules remains yet to be discovered. Here, we report a highly enantioselective dehydrogenative dienylation of imines with unactivated α-alkenes driven by the synergistic action of palladium complex and carboxylic acid. Chiral phosphoramidite ligands turned out to be superior in modulating the performance of palladium autotandem catalysis and allowed a broad range of α-alkenes and imines to be transformed into chiral dienylamines. Mechanistic studies suggest that the dienes could be in situ generated from α-alkenes through a palladium(0)-mediated dehydrogenative process in the presence of excess benzoquinone oxidants, and then participated in the Pd-chiral phosphoramidite-catalyzed intermolecular vinylogous-type addition to the imines activated by the carboxylic acid co-catalyst. Notably, the second β-H elimination occurring in the dienylation event might be the turnover-limiting step.

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Palladium installed copper-organic framework for C–C coupling reactions

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Science China Chemistry 2025年

作者： Yu-Mei Wang Mei-Xia Tao Kai-Ming Mo Xu Chen shu-Hua zhong Elena S shubina Guo-Hong Ning Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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社区乙型肝炎表面抗原阳性人群血清流行病学特征分析

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中国全科医学 2017年第2期20卷 191-195页

作者：王宇飞王波孙国栋蒲中枢闫永平王安辉中国人民解放军第四军医大学预防医学系流行病学教研室陕西省西安市710032

目的了解社区乙型肝炎表面抗原(HBs Ag)阳性人群血清流行病学特征,为乙型肝炎防治示范区现场研究提供基础数据。方法选取武威市2010—2014年乙型肝炎防治示范区经社区健康体检筛选及各社区卫生服务中心报告的HBs Ag阳性者为研究对象。... 详细信息

目的了解社区乙型肝炎表面抗原(HBs Ag)阳性人群血清流行病学特征,为乙型肝炎防治示范区现场研究提供基础数据。方法选取武威市2010—2014年乙型肝炎防治示范区经社区健康体检筛选及各社区卫生服务中心报告的HBs Ag阳性者为研究对象。采用自制的调查问卷收集研究对象人口学特征以及治疗情况。采集研究对象静脉血,检测HBs Ag、乙型肝炎表面抗体(HBs Ab)、乙型肝炎e抗原(HBe Ag)、乙型肝炎e抗体(HBe Ab)、乙型肝炎核心抗体(HBc Ab)等血清学指标,以及丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)、总胆红素(TBIL)、直接胆红素(DBIL)、谷氨酸转肽酶(GGT)、清蛋白(ALB)及甲胎蛋白(AFP)水平等生化指标。结果本研究获得由社区健康体检筛选或社区卫生服务中心报告的HBs Ag阳性者3 678例。HBs Ag阳性者血清学共有14种组合模式,HBs Ag、HBe Ab、HBc Ab阳性模式(模式1)占69.06%(2 540/3 678),HBs Ag、HBc Ab阳性模式(模式2)占13.30%(489/3 678),HBs Ag、HBe Ag、HBc Ab阳性模式(模式3)占11.56%(425/3 678)。不同主要血清学模式的HBs Ag阳性者性别、年龄、婚姻状况、文化程度、职业、体质指数及乙型肝炎家族史比较,差异均有统计学意义(P2倍参考范围上限者中,HBe Ag阳性与阴性者定期复查、药物治疗及因乙型肝炎住院治疗比例比较,差异均无统计学意义(P>0.05)。结论武威市社区HBs Ag阳性人群血清学以HBs Ag、HBe Ab、HBc Ab阳性模式为主,HBe Ag阳性与阴性者抗病毒药物治疗率均较低。

关键词：乙型肝炎乙型肝炎表面抗原社区血清流行病学研究

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Quantitative reconstruction of salinity and precipitation changes in Central Asia over the past 3200 years using diatom and pollen records of lacustrine sediment in Aibi Lake of SW Junggar Basin

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Journal of Earth Science 2025年

作者： Long Pan Guoqiang Li Xiaoyan Wang Ming Jin Xinrong He Luo Qin zhong Wang Wenwei Zhao Chunzhu Chen Yuanlu Liu Jin Yang Lele shu Key Laboratory of Western China's Environmental Systems (Ministry of Education)， College of Earth and Environmental Sciences， Lanzhou University College of Earth Sciences， Chengdu University of Technology School of Geographic Science， Nantong University Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions， Northwest Institute of Eco-Environment and Resources， Chinese Academy of Sciences

The response of lake environments in arid Central Asia to climate change during the Late Holocene over the centennial to millennial timescales remains contentious. The reason that primarily paleoenvironmental proxies interpreting diverse and the scarcity of accurate quantitative reconstruction records. In this study， we employed diatoms and pollen records from lacustrine sediment in the Aibi Lake of SW Junggar Basin to quantitatively reconstruct salinity and watershed precipitation amounts while exploring the associated forcing mechanism. The results indicate that Aibi Lake salinity varied between 2 g/L and 47 g/L during the Late Holocene period， indicating a generally brackish environment， and corresponding to prevailing Tryblionella granulata diatom in the lake basin. Westerly-dominated annual precipitation varied between 250 mm and 320 mm during the Late Holocene period in the basin， exhibiting a generally semi-arid environment and prevailing desert steppe vegetation. The Aibi Lake has a low salinity of average value of ～15 g/L. It exhibits elevated precipitation (average value of ～280 mm) during the periods of the Roman Warm Period (2900-1990 cal yr BP)， Dark Age Cold Period (1570-1140 cal yr BP)， and Little Ice Age (590-120 cal yr BP). The reconstructed precipitation and salinity exhibit a periodicity of ～200 years， which is consistent with the cycle of phase changes of the North Atlantic Oscillation (NAO) and Total Solar Irradiance (TSI). This correlation suggests that variations in NOA and TSI significantly influence the precipitation and salinity changes in Central Asia over centennial to millennial timescales.

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武威市某社区人群HBsAg携带者自发性再激活的流行病学特征

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中华疾病控制杂志 2017年第4期21卷 332-335页

作者：孙国栋王安辉王宇飞蒲中枢付婷王洋闫永平第四军医大学军事预防医学院军队流行病学教研室陕西西安710032

目的分析社区人群乙型肝炎表面抗原(hepatitis B surface antigen,HBsAg)携带者发生自发性再激活的流行病学特征,为社区人群乙型肝炎的防控和管理提供科学依据。方法在2010年9月甘肃省武威市乙型肝炎血清流行病学调查建立的HBsAg携带者... 详细信息

目的分析社区人群乙型肝炎表面抗原(hepatitis B surface antigen,HBsAg)携带者发生自发性再激活的流行病学特征,为社区人群乙型肝炎的防控和管理提供科学依据。方法在2010年9月甘肃省武威市乙型肝炎血清流行病学调查建立的HBsAg携带者队列基础上,于2012年和2014年开展随访研究,分析自发性再激活的发生情况和流行病学特征。结果随访发现,852例HBsAg携带者中共有72例发生再激活,发病密度为2 746.8/10万人年。不同性别间再激活率差异存在统计学意义(x^2=3.901,P=0.048),男性累积再激活率为10.39%,高于女性累积再激活率(6.62%)。各年龄组间再激活率也存在统计学差异(x^2=6.524,P=0.038),其中46~59岁年龄组累积再激活率最高,为11.95%。HBsAg携带者基线乙型肝炎病毒(hepatitis B virus,HBV)DNA水平不同,再激活率也不同(x^2=10.404,P=0.006),当HBV DNA基线水平>1×10~5IU/ml时,累积再激活率可达14.36%。结论社区HBsAg携带者中存在一定比例的自发性再激活,其中男性、中年人群和基线HBV DNA水平较高者易发生再激活,应进一步加强HBV携带者的管控工作,对其定期进行随访监测,合理选择抗病毒治疗时机。

关键词：医院,社区肝炎表面抗原,乙型流行病学研究

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CHARACTERISTICS OF EVOLUTION OF POTENTIAL EVAPORATION IN TIANJIN REGION OF CHINA

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Journal of Hydrodynamics 2004年第3期16卷 290-294页

作者： RONGYan-shu TUQi-pu NanjingInstituteofMeteorology Nanjing210044China

The characteristics of seasonal and annual changes of potential evaporation,the variations of thermal and dynamical evaporation in different seasons and the relationshipsbetween potential evaporation and meteorological elements were analyzed according to the observeddata of 9 stations from 1961 to 2001 in the Tianjin region of China. Analyses indicate that thermalevaporation is the main part of the potential evaporation and offers about 90% fraction of to it insummer, while in winter the dynamical evaporation is greater than the thermal one, especially inJan. , offering 100% contribution, that the influence of temperature on the change of potentialevaporation was much larger than that of wind, vapor pressure and sunshine duration, and potentialevaporation increased by 30. 33mm with temperature raise 1℃, and that potential evaporation had asurprising increasing tendency, in particular during the recent decade, with the velocity of 4.22mm/a. The potential evaporation in the Tianjin region will be higher than the past, especially onthe global warming background, so that it has the great effects not only on the climatic forcingchanges, but also on development of city and e-conomy.

关键词： potential evaporation thermal and dynamical evaporation meteorology

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高品质学校的内涵结构、建设困境与突破路径

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教学与管理 2025年第1期 19-23页

作者：邓纯臻隆平陈书忠重庆师范大学生命科学学院重庆401331 四川省攀枝花市第七高级中学校四川攀枝花617005 重庆市育才中学校重庆400050

高品质学校的创建既是区域教育高质量发展的基本组成,也是助推教育强国、人才强国建设的实践基础。综合来看,学校内部维度的高品质是一种过程取向以及主观层面的高品质,外部维度的高品质是一种结果取向以及客观层面的高品质,高品质学校... 详细信息

高品质学校的创建既是区域教育高质量发展的基本组成,也是助推教育强国、人才强国建设的实践基础。综合来看,学校内部维度的高品质是一种过程取向以及主观层面的高品质,外部维度的高品质是一种结果取向以及客观层面的高品质,高品质学校包括学生、教师、管理者以及课程、课堂、课题六个核心的动力要素。当前,高品质学校的建设依然在前沿理论、本地生源、教育资源以及师资队伍等方面存在一些阻碍,对此,建议从学校文化、优质资源、课程体系、师资队伍、管评系统等五个维度探寻突破路径,以期找到高品质学校的创新之路、高品质之路。

关键词：教育高质量发展高品质学校中小学管理学校治理

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