检索结果-南通市图书馆

The Distribution and Potential Exposure Factors of Physical Activity Level Among Middle-Aged and Elderly Population—Six Communities,Beijing,China,October 2020 to January 2021

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2022年第27期4卷 593-600页

作者： Heming Pei Ning Kang Fan Yang Xinming Song Gong Chen Dongmin Wang Institute of Population Research/Institute on Aging Peking UniversityBeijingChina Department of Physical Education Peking UniversityBeijingChina.

Summary What is already known about this topic?Available evidence suggested that 31%of the world’s population do not meet the minimum recommendations for physical activity.What is added by this report?The latest findings showed that physical activity level(PAL),metabolic equivalents(MET)in min/week with<4,500(low),4,500–6,000(moderate)and≥6,000(high)accounted for 45.72%,25.62%,and 28.66%of middle-aged and elderly population in Changchunyuan Community,Weixiuyuan Community,Zhongguanyuan Community,Yanbeiyuan Community,Kangzeyuan Community,and Xima Community,respectively.The moderate and high PAL was associated with a decreased risk of hypertension,cardiovascular disease,dyslipidemia,and poor sleep.What are the implications for public health practice?More attention should be given to the middle-aged population who may be at high risk of insufficient physical activity in urban environments as it is of public health significance for improving the community population health.

关键词： Population Beijing Middle

Numerical Stability and Accuracy of Contact Angle Schemes in Pseudopotential Lattice Boltzmann Model for Simulating Static Wetting and Dynamic Wetting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第10期137卷 299-318页

作者： Dongmin Wang Gaoshuai Lin Key Laboratory of Multiphase Flow and Heat Transfer in Shanghai Power Engineering School of Energy and Power EngineeringUniversity of Shanghai for Science and TechnologyShanghai200093China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application Suzhou University of Science and TechnologySuzhou215009China

There are five most widely used contact angle schemes in the pseudopotential lattice Boltzmann(LB)model for simulating the wetting phenomenon:The pseudopotential-based scheme(PB scheme),the improved virtualdensity scheme(IVD scheme),the modified pseudopotential-based scheme with a ghost fluid layer constructed by using the fluid layer density above the wall(MPB-C scheme),the modified pseudopotential-based scheme with a ghost fluid layer constructed by using the weighted average density of surrounding fluid nodes(MPB-W scheme)and the geometric formulation scheme(GF scheme).But the numerical stability and accuracy of the schemes for wetting simulation remain unclear in the past.In this paper,the numerical stability and accuracy of these schemes are clarified for the first time,by applying the five widely used contact angle schemes to simulate a two-dimensional(2D)sessile droplet on wall and capillary imbibition in a 2D channel as the examples of static wetting and dynamic wetting simulations respectively.(i)It is shown that the simulated contact angles by the GF scheme are consistent at different density ratios for the same prescribed contact angle,but the simulated contact angles by the PB scheme,IVD scheme,MPB-C scheme and MPB-W scheme change with density ratios for the same fluid-solid interaction strength.The PB scheme is found to be the most unstable scheme for simulating static wetting at increased density ratios.(ii)Although the spurious velocity increases with the increased liquid/vapor density ratio for all the contact angle schemes,the magnitude of the spurious velocity in the PB scheme,IVD scheme and GF scheme are smaller than that in the MPB-C scheme and MPB-W scheme.(iii)The fluid density variation near the wall in the PB scheme is the most significant,and the variation can be diminished in the IVD scheme,MPB-C scheme andMPBWscheme.The variation totally disappeared in the GF scheme.(iv)For the simulation of capillary imbibition,the MPB-C scheme,MPB-Wscheme and GF scheme simulate the dynamics of the liq

关键词： Pseudopotential lattice Boltzmann model contact angle scheme static wetting dynamic wetting capillary imbibition

Association Between Physical Activity and Physical Fitness Among Adults Aged 40 to 79 Years—Beijing,China,2020–2021

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2022年第42期4卷 936-940页

作者： Xiaojin Yan Heming Pei Yalu Zhang Ning Kang Gong Chen Dongmin Wang Institute of Population Research Peking UniversityBeijingChina Department of Physical Education Peking UniversityBeijingChina

Summary What is already known about this topic?Physical fitness is well documented to be associated with physical activity among adults in the United States.In China,research on this association places a heavier emphasis on the populations of children and adolescents.What is added by this report?Physical fitness was shown to be positively associated with physical activity among adults aged 40 to 79 years in China.In populations with lower levels of physical fitness,this association was stronger.The coefficients of the log-transformed metabolic equivalent value of physical activity(logPA)in quantile regression models at the 25th,50th,75th,and 90th percentile of the physical fitness indicators were 1.14,1.04,0.89,and 0.84,respectively.

关键词： Physical logP transformed

Fall Injuries and Depressive Symptoms Among Older Adults and the Mediating Effects of Social Participation—China,2011–2018

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2021年第40期3卷 837-841页

作者： Yalu Zhang Lei Zhang Xinhui Zhang Jingjing Sun Dongmin Wang Gong Chen Institute of Population Research Peking UniversityBeijingChina Department of Physical Education Peking UniversityBeijingChina.

Summary What is already known on this topic?Prior studies found that fall events were associated with a higher level of depressive symptoms and a lower level of social functioning and social participation.In addition,social participation has also been significantly associated with better conditions of depressive symptoms.What is added by this report?

关键词： participation Effects symptoms

Functional outcomes of Tai Chi exercise prescription in women with knee osteoarthritis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sports Medicine and Health Science 2022年第4期4卷 239-244页

作者： Ning Kang Yi wang Gong Chen Chao Guo Zhanjia Zhang Donghui Mei Nancy Morrow-Howell Dongmin Wang Institute of Population Research Peking UniversityNo.5 Yiheyuan Road Haidian DistrictBeijing100871China University of Iowa School of Social Work 225B North HallIowa CityIA52242USA Department of Physical Education Peking UniversityNo.5 Yiheyuan Road Haidian DistrictBeijing100871China Capital Normal University 105 West Third Ring Road NorthHaidian DistrictBeijing100048China Washington University in St.Louis Brown SchoolOne Brookings DriveCampus Box 1196St.LouisMO63130USA

Knee Osteoarthritis(KOA)is the most common type of knee joint injury and also a risk factor for multiple health consequences and is prevalent among older women.The updated clinical guidelines for KOA treatment by the American Rheumatism Association recommend Tai Chi exercise.However,a literature review outlined limitations in Tai Chi intervention implementations.This study aimed to address some of the gaps.This study selected thirty female patients to participate in Tai Chi exercises and undergo relevant tests.The subjects were randomly assigned to Tai Chi or education groups.Independent sample t-tests were conducted to compare the difference in health indicators between the two groups after the intervention.The difference-in-differences(DID)regression was performed to assess the difference in the health outcomes between the two groups at baseline and follow-up and the difference in the differences.After the completion of the intervention,the Tai Chi group reported significantly improved KOA symptoms,physical fitness,and health status indicators than the control group.Specifically,the group differences were significantly larger at the baseline than at the follow-up.Our findings provide compelling evidence of the effects of the innovative Tai Chi exercise prescription specifically designed for KOA patients.The empirical evidence on its effectiveness in alleviating KOA symptoms and improving the overall health of middle-aged and elderly women with KOA suggested that Tai Chi intervention exercise has huge prospects for integration in KOA rehabilitation therapy.

关键词： Tai Chi KOA Intervention Exercise prescription

Influence of traditional Chinese medicines on the in vivo metabolism of lopinavir/ritonavir based on UHPLC-MS/MS analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2022年第2期12卷 270-277页

作者： Linlin Li Xinxiang Yu dongmin Xie Ningning Peng Weilin wang Decai wang Binglong Li Department of Clinical Pharmacy School of PharmacyShandong First Medical University&Shandong Academy of Medical SciencesTai'anShandong271016China

A fast,reliable,and cost-effective liquid chromatography-tandem mass spectrometry method was established to determine the effects of the traditional Chinese medicine employed to treat coronavirus disease 2019,namely,Lianhua Qingwen granules,Huoxiang Zhengqi capsules,Jinhua Qinggan granules,Shufeng Jiedu capsules,and Angong Niuhuang pills,on the pharmacokinetics of lopinavir/ritonavir in rats.Blood samples were prepared using the protein precipitation method and atazanavir was selected as the internal standard(IS).Separation was performed on an Agilent ZORBAX eclipse plus C18(2.1 mm×50 mm,1.8 μm)column using acetonitrile and water containing 0.1%formic acid as the mobile phase for gradient elution.The flow rate was 0.4 mL/min and the injection volume was 2 μL.Agilent Jet Stream electrospray ionization was used for mass spectrometry detection under positive ion multiple reaction monitoring mode at a transition of m/z 629.3→447.3 for lopinavir,m/z 721.3→296.1 for ritonavir,and m/z 705.4→168.1 for the IS.The method showed good linearity in the concentration range of 25→2500 ng/mL(r=0.9981)for lopinavir and 5e500 ng/mL(r=0.9984)for ritonavir.The intra-day and inter-day precision and accuracy were both within±15%.Items,such as dilution reliability and residual effect,were also within the acceptable limits.The method was used to determine the effects of five types of traditional Chinese medicines on the pharmacokinetics of lopinavir/ritonavir in rats.The pharmacokinetic results showed that the half-life of ritonavir in the groups administered Lianhua Qingwen granules and Huoxiang Zhengqi capsules combined with lopinavir/ritonavir was prolonged by approximately 1.5-to 2-fold relative to that in the control group.Similarly,the pharmacokinetic parameters of lopinavir were altered.Overall,the results of this study offer important theoretical parameters for the effective clinical use of five types of traditional Chinese medicines combined with lopinavir/ritonavir to reduce the occurrence of clinical adverse reactions.

关键词： Lopinavir/ritonavir Combination of Chinese and western medicine Drug-drug interaction Ultra high-performance liquid chromatography-tandem mass spectrometry Pharmacokinetics COVID-19

An Isolable Phosphinogermylyne as a Synthon of One-Coordinate GeI Radical

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CHINESE JOURNAL OF CHEMISTRY 2024年第7期42卷 736-742页

作者： wang, dongmin Chen, Haonan He, Yuhao Chen, Xiaodan Zhang, Li Tan, Gengwen Sun Yat Sen Univ Guangdong Basic Res Ctr Excellence Funct Mol Engn Sch Chem Key Lab Bioinorgan & Synthet ChemMinist EducIGCM Guangzhou 510275 Guangdong Peoples R China Soochow Univ Coll Chem Chem Engn & Mat Sci Innovat Ctr Chem Sci Suzhou 215123 Jiangsu Peoples R China Hangzhou Normal Univ Key Lab Organosilicon Chem & Mat Technol Minist Educ Hangzhou 311121 Zhejiang Peoples R China Guangxi Univ Sci & Technol Sch Elect Engn Liuzhou 545000 Guangxi Peoples R China Jinan Univ Coll Chem & Mat Guangzhou 510632 Guangdong Peoples R China

Reduction of chlorogermylene M(s)Fluind(tBu)-GeCl 1 with potassium graphite (KC8) afforded putative germylyne radical M(s)Fluind(tBu)-Ge 2 as confirmed by electron paramagnetic resonance (EPR) spectroscopy. However, it slowly decayed via C-H bond activation at the fluorenyl moiety to yield a bis(germylene) 3 at room temperature. By using a Lewis base to stabilize the unoccupied p orbital at the Ge-I radical center, acyclic two-coordinate Ge-I radicals M(s)Fluind(tBu)-Ge(I-Me4) 4 (I-Me4 = 1,3,4,5-tetramethyl-imidazolin-2-ylidene), M(s)Fluind(tBu)-Ge(I-iPr) 5 (I-iPr = 1,3-diisopropyl-4,5-dimethyl-imidazolin-2-ylidene), M(s)Fluind(tBu)-Ge(PMe3) 6 were isolated in crystalline forms. The unpaired electron in 4-6 mainly resides at the Ge 4p orbital as revealed by EPR spectroscopic studies and theoretical calculations. Interestingly, facile ligand exchange of PMe3 in 6 with I-Me4 and I-iPr was observed to afford 4 and 5, respectively. Moreover, phosphinogermylyne 6 reacted with PhEEPh (E = S, Se), 4-tetrabutylphenylacetylene (Ar'CCH), [CpMo(CO)(3)](2) and nBu(3)SnH to furnish germylenes M(s)Fluind(tBu)-GeEPh (E = S 7, Se 8), M(s)Fluind(tBu)-GeCH=CHAr' 9, a germylyne complex M(s)Fluind(tBu)-Ge equivalent to Mo(CO)(2)Cp 10 and a Ge(IV) compound M(s)Fluind(tBu)-GeH(2)SnnBu(3) 11, respectively. The reactivity studies demonstrate that 6 can act as a synthon of one-coordinate germylyne radical attributing to labile coordination of trimethylphosphine.

关键词： Phosphinogermylyne Germanium Radicals Donor-acceptor systems Radical reactions MAIN-GROUP ELEMENTS GERMYL SILYL DIHYDROGEN GERMANIUM DIGERMYNE COMPOUND ANIONS IONS

Effects of Clay on Properties of Polycarboxylate Superplasticizer and Solutions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2015年第6期30卷 1167-1171页

作者：王林 wang dongmin School of Civil and Transportation Engineering Beijing University of Civil Engineering and Architecture School of Chemical and Environmental Engineering China University of Mining and Technology

The infl uence law of clay on mortar fluidity mixed with polycarboxylate superplasticizer was studied. Several methods of inhibiting clay adsorption of polycarboxylate superplasticizer were discussed. The experimental results show that clay has signifi cant effect on the dispersion of polycarboxylate superplasticizer and montmorillonite clay has more signifi cant impact on mortar fluidity than other clays. The pH value and the salts of the solution can affect the adsorption of clay to polycarboxylate superplasticizer. The incorporation of a small amount of sodium hydroxide solution, sodium silicate or cationic surfactants can improve the effect of the clay on the dispersion of polycarboxylate superplasticizer.

关键词： clay polycarboxylate superplasticizer fluidity adsorb

Implementing Routine HIV Screening in Hospitals:An Effective Practice to Expand HIV Testing—Xishuangbanna Prefecture,Yunnan Province,China,2019–2020

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

China CDC weekly 2023年第13期5卷 283-286页

作者： Yidan wang Yanling Ma Qiyu Zhu Wenyue Xu Haolan Sun dongmin Li Cong Jin National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina Yunnan Center for Disease Control and Prevention Kunming CityYunnan ProvinceChina Xishuangbanna Center for Disease Control and Prevention Xishuangbanna PrefectureYunnan ProvinceChina School of Chemistry and Molecular Biosciences University of QueenslandSt LuciaAustralia

Summary What is already known about this topic?Research evidence is insufficient to suggest whether routine human immunodeficiency virus(HIV)screening in healthcare settings is effective in promoting greater awareness of HIV-positive status.What is added by this report?This study found that,following the implementation of routine HIV screening in hospitals in Xishuangbanna Prefecture,Yunnan Province,there was a significant increase in the number of HIV screenings,positive results,and the positive rate of HIV screening in primary-level hospitals.What are the implications for public health practice?Routine hospital-based HIV screening is effective in identifying HIV infections in areas with concentrated epidemics.

关键词： routine Prefecture identifying