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Exposure to secondhand smoke at home from neighbourhood and respiratory symptoms in Hong Kong adolescents

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Exposure to secondhand smoke at home from neighbourhood and ...

第16届全国控制吸烟暨第6届青少年控烟经验学术交流会

作者： Ho SY Leung lt wang MP Lo WS Lam TH School of Public Health The University of Hong Kong

＜正＞Background Adolescent respiratory symptoms are associated withsecondhand smoke（SHS）exposure at home that typically refers to nearby smokinginside *** ignores SHS from neighbourhood,which we have found to be prevalent in Hong Kong homes mostly in urban multi-storey *** health effects of such exposure have never been reported to the best of our ***

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Diffusion Studies on Polystyrene in 1,4-Dioxane

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Chemical Research in Chinese Universities 1992年第4期8卷 445-449页

作者： lt Jun-bai, MA Rong-jiu, wang Jing-jiang and SHEN Jia-cong (Department of Chemistry, Jilin University, Changchun, 130023)

The diffusion behavior of polystyrene with narrow molecular weight distribution at 20℃ in 1, 4-dioxane was investigated by the photon correlation spectroscopy. The cumulant method was employed for the analysis of the intensity-intensity autocorrelation function measured over a wide range of the scattering vector. The diffusion coefficient D was determined as the function of concentration C in the molecular weight range of 3. 0×104-1. 20×106. In a low concentration range, D was found to be linearly dependent on C, which has been found for some other systems. The dependence of D on molecular weight at infinite dilution can be written as an empirical formula D0 = kDM-γ M, the exponent γ(0. 576 ±0. 01) is in good agreement with the result of the scaling theory.

关键词： Molecular diffusion Polystyrene Dynamic light scattering

Factors associated with adolescents’ thirdhand smoke exposure at smoking homes in Hong Kong

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Factors associated with adolescents’ thirdhand smoke exposu...

第16届全国控制吸烟暨第6届青少年控烟经验学术交流会

作者： Leung lt Ho SY wang MP Lo WS Lam TH School of Public Health The University of Hong Kong

＜正＞Introduction Thirdhand smoke（THS）,the tobacco smoke residue on surfaces and dust,persists in indoor environment and poses threats to *** investigated factors associated with THS exposure at home among adolesce...

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Thirdhand smoke exposure at home and respiratory symptoms among never-smoking adolescents

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Thirdhand smoke exposure at home and respiratory symptoms am...

第16届全国控制吸烟暨第6届青少年控烟经验学术交流会

作者： Leung lt Ho SY wang MP Lo WS Lam TH School of Public Health The University of Hong Kong

＜正＞Introduction Thirdhand smoke（THS）is the tobacco smoke residue which deposits on surfaces and dust and is then re-emitted into air over *** secondhand smoke（SHS）,its route of exposure is not limited to inhalation,but also ingestion and dermal *** the harms of SHS are widely reported,little is known about the effects of *** investigated the association of

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Underestimation of adolescent exposure to second-hand smoke at urban homes in Hong Kong

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Underestimation of adolescent exposure to second-hand smoke ...

第16届全国控制吸烟暨第6届青少年控烟经验学术交流会

作者： Leung lt Ho SY wang MP Lo WS Lam TH School of Public Health The University of Hong Kong

＜正＞Background Adolescent exposure to secondhand smoke（SHS）at home typically refers to smoking that occurs inside home（*** Youth Tobacco Survey）.This ignores SHS from neighbourhood sources that has been detected in smokefree homes as PM 2.5,an environmental marker of *** densely populated Hong Kong,where most people live in small multi-storey housing units and

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Effects of nitrogen addition and drought on the relationship between nitrogen-and water-use efficiency in a temperate grassland

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Ecological Processes 2023年第1期12卷 507-519页

作者： Jiaxin Hu wang Ma Zhengwen wang Erguna Forest-Steppe Ecotone Research Station CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

Background Nitrogen-and water-use efficiency(NUE and WUE)reflect the capacity of plants to take up and utilize resources in the *** N deposition and drought are known to affect plant growth and persistence,it remains elusive how plants adjust NUE,WUE and their relationship to adapt to the concurrent N deposition and drought under the context of global *** conducted a field experiment in a temperate grassland in Inner Mongolia,in which N addition(10 g m^(–2)yr^(-1)),drought(reduced 66%precipitation during growing season)and their combination were manipulated,and we explored the responses of both instantaneous(NUE_(INST)and WUE_(INST))and long-term(NUE_(lt)and WUE_(lt))WUE and NUE for six common plant species(Leymus chinensis,Stipa baicalensis,Thermopsis lanceolata,Potentilla bifurca,Thalictrum squarrosum,Klasea centauroide).Results Across all the six species,NUE_(INST)decreased and WUE_(INST)increased with both N addition and drought;NUE_(lt)decreased with both N addition and drought,while WUE_(lt)decreased with N addition and increased with drought.A significant interactive effect between N addition and drought was detected,in that,drought weakened the negative effect of N addition on WUE_(lt)and NUE_(lt),and N addition weakened the negative effect of drought on NUE_(lt),but enhanced the positive effect of drought on WUE_(lt).As a consequence,drought caused a trade-off between NUE and WUE,and N addition brought forth positive correlation between NUE and ***,the relationship between NUE and WUE varied among the species of different functional *** Our study demonstrated that NUE,WUE and their relationship play an important role in determining their responses and adaptability to changes in soil nitrogen and water availability induced by N deposition and *** results shed light on the antagonistic,synergetic and neutral effects between nitrogen deposition and drought on resource use efficiency,and further clarified

关键词： Functional group Global change Leaf carbon to nitrogen ratio Nitrogen water coupling Photosynthesis Semi-arid grassland Stable isotope

The association between reproductive factors and systemic sclerosis in Chinese women:A case-control study and meta-analysis

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The association between reproductive factors and systemic sc...

安徽省2019年度流行病与卫生统计学学术年会

作者：李娟 Chen SY Yin XD Cao lt Huang XL Xu JH Ye DQ wang J 安徽医科大学公共卫生学院

AIM:To examine the associations between female menstrual or reproductive factors and the development of systemic sclerosis(SSc) in ***:In this hospital-based case-control study,for each subject,data on reproductive and menstrual factors such as number of births,abortions,and age at menarche were obtained by structured *** estimates,measured by the odds ratio(OR) and 95% confidence interval(CI),were obtained by unconditional logistics ***,meta-analysis was performed and pooled OR with 95% CI for the number of pregnancies and abortions were ***:There were 166 SSc and 392 female controls seen during the study *** results showed women with late menarche age(≥17 years) were less likely than those with earlier age at menarche to develop SSc(OR 0.347,95% CI 0.174-0.693) and compared with women without abortion,women with abortion(1 time) were at reduced risk of developing SSc(P =.036).After adjusting for potential confounders such as occupation and body mass index(BMI),late age at menarche(≥17 years) was associated with a decreased risk of SSc(OR 0.187,95% CI 0.068-0.513),but abortions were not significantly related to *** meta-analysis revealed there was no association between SSc and abortions or number of *** significant publication bias was observed(P >.05).CONCLUSION:Late age at menarche was associated with a reduced risk of SSc but abortion may not be an independent risk factor for *** investigations are required to verify our findings.

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Cross-layer design of lt codes and LDPC codes for satellite multimedia broadcast/multicast services

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Chinese Journal of Aeronautics 2013年第5期26卷 1269-1275页

作者： wang Zhenbang wang Zhenyong Gu Xuemai Guo Qing School of Electronics and Information Engineering Harbin Institute of Technology

According to large coverage of satellites, there are various channel states in a satellite broadcasting network. In order to introduce an efficient rateless transmission method to satellite multimedia broadcasting/multicast services with finite-length packets, a cross-layer packet transmission method is proposed with Luby transform （lt） codes for efficiency in the network layer and low density parity check （LDPC） codes for reliability in the physical layer jointly. The codewords generated from an lt encoder are divided into finite-length packets, which are encoded by an LDPC encoder subsequently. Based on noise and fading effects of satellite channels, the lt packets received from an LDPC decoder either have no error or are marked as erased, which can be mod- eled as a binary erasure channels （BECs）. By theoretical analysis on lt parameters and LDPC parameters, the relationships between LDPC code rates in the physical layer and lt codes word lengths in the network layer are investigated. With tradeoffs between the lt codes word lengths and the LDPC code rates, optimized cross-layer solutions are achieved with a binary search algorithm. Verified by simulations, the proposed solution for cross-layer parameters design can provide the best transmission mode according to satellite states, so as to improve throughput performance for satellite multimedia transmission.

关键词： Broadcast/multicast Cross-layer LDPC codes lt codes Satellite multimedia

α-secretase ADAM IO physically interacts with β-secretase BACE1 in neurons and regulates CHL1 proteolysis

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Journal of Molecular Cell Biology 2018年第5期10卷 411-422页

作者： Xin wang Congcong wang Gang Pei State Key Laboratory of Cell Biology CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell Biology Chinese Academy of Sciences University of Chinese Academy of Sciences Shanghai 200031 China Shanghai Key Laboratory of Signaling and Disease Research Collaborative Innovation Center for Brain Science School of Life Sciences and Technology Tongji University Shanghai 200092 China

α-secretase and β-secretase are known to compete for amyloid precursor protein （APP） processing and thus play a vital role in Alzheimer＇s disease pathogenesis. A disintegrin and metaUoproteinase 10 （ADAM10） and β-site APP cleaving enzyme 1 （BACE1） mediate the major activities of α-secretase and β-secretase in brain and share various common substrates. However, whether they function separately or together is poorly understood. Here, we show that ADAM10 and BACE1 co-localize in the neurites of mouse primary neurons. Co-immunoprecipitation and fluorescence resonance energy transfer analysis revealed that ADAM10 and BACE1 interact with each other under both endogenous and exogenous conditions. In addition, we found that ADAMIO enhances the proteolysis of neural cell adhesion molecule close homolog of L1 （CHL1） by BACE1. Further studies found that ADAM10-BACE1 interaction interfering peptide lt52 attenuates the regulation of ADAM10 on BACEl-mediated cleavage of CHL1. Our data indicate that ADAM10-BACE1 interaction regulates the proteolysis of some specific substrates and may play a potential role in brain function.

关键词： secretase Alzheimer's disease ADAM10 BACE1 interact APP CHL1