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1DISTRIBUTION OF CARBONACEOUS AEROSOL DURING SPRING 2005 OVER THE HORQIN SANDLAND IN NORTHEASTERN CHINA显示文摘The objective of this study was to characterize the elemental carbon and organic carbon (EC and OC, respectively) content of aerosol particles (PM2.5) collected at Tongliao, a site in the Horqin Sandland of northeastern China. During spring 2005, the PM2.5 mass concentration was 126±71 μg?m-3, with higher dust concentrations during five dust storms than on non-dusty days (255±77 vs. 106±44 μg?m-3). The average OC and EC concentrations in PM2.5 de-termined by a thermal/optical reflectance method were 15.7±7.3 μg?m-3 and 3.3±1.7 μg?m-3, respectively, and carbona-ceous aerosol accounted for 9.9% of the PM2.5 mass during dust storms compared to 21.7% on normal days. The aver-age ratios of OC to EC during dust storms were similar to those on non-dusty days, and the correlation coefficient be-tween OC and EC was high, 0.86. The high OC/EC ratios, the distributions of eight carbon fractions, and the strong rela-tionship between K with OC and EC indicate that rural biomass burning was the dominant contributor to the regional carbonaceous aerosol.Xuxiang Li Zhenxing Shen Junji Cao Suixin Liu Chongshu Zhu Ting Zhang 2006China Particuology2006,4,6:10
2Animal exercise studies in cardiovascular research:Current knowledge and optimal design--A position paper of the Committee on Cardiac Rehabilitation,Chinese Medical Doctors’Association显示文摘Growing evidence has demonstrated exercise as an effective way to promote cardiovascular health and protect against cardiovascular diseases However,the underlying mechanisms of the beneficial effects of exercise have yet to be elucidated.Animal exercise studies are widely used to investigate the key mechanisms of exercise-induced cardiovascular protection.However,standardized procedures and well-established evaluation indicators for animal exercise models are needed to guide researchers in carrying out effective,high-quality animal studies using exercise to prevent and treat cardiovascular diseases.In our review,we present the commonly used animal exercise models in cardiovascular research and propose a set of standard procedures for exercise training,emphasizing the appropriate measurements and analysis in these chronic exercise models.We also provide recommendations for optimal design of animal exercise studies in cardiovascular research,including the choice of exercise models,control of exercise protocols,exercise at different stages of disease,and other considerations,such as age,sex,and genetic background.We hope that this position paper will promote basic research on exercise-induced cardiovascular protection and pave the way for successful translation of exercise studies from bench to bedside in the prevention and treatment of cardiovascular diseases.Yihua Bei Lei Wang Rongjing Ding Lin Che Zhiqing Fan Wei Gao Qi Liang Shenghui Lin Suixin Liu Xiao Lu Yuqin Shen Guifu Wu Jian Yang Guolin Zhang Wei Zhao Lan Guo Junjie Xiao 2021Journal of Sport and Health Science2021,10,6:2
3Impacts of Aerosol−Radiation Interactions on the Wintertime Particulate Pollution under Different Synoptic Patterns in the Guanzhong Basin,China显示文摘The effects of aerosol-radiation interactions(ARI)are not only important for regional and global climate,but they can also drive particulate matter(PM)pollution.In this study,the ARI contribution to the near-surface fine PM(PM_(2.5))concentrations in the Guanzhong Basin(GZB)is evaluated under four unfavorable synoptic patterns,including“northlow”,“transition”,“southeast-trough”,and“inland-high”,based on WRF-Chem model simulations of a persistent heavy PM pollution episode in January 2019.Simulations show that ARI consistently decreases both solar radiation reaching down to the surface(SWDOWN)and surface temperature(TSFC),which then reduces wind speed,induces sinking motion,and influences cloud formation in the GZB.However,large differences under the four synoptic patterns still exist.The average reductions of SWDOWN and daytime TSFC in the GZB range from 15.2%and 1.04°C in the case of the“transition”pattern to 26.7%and 1.69°C in the case of the“north-low”pattern,respectively.Furthermore,ARI suppresses the development of the planetary boundary layer(PBL),with the decrease of PBL height(PBLH)varying from 18.7%in the case of the“transition”pattern to 32.0%in the case of the“north-low”pattern.The increase of daytime near-surface PM_(2.5)in the GZB due to ARI is 12.0%,8.1%,9.5%,and 9.7%under the four synoptic patterns,respectively.Ensemble analyses also reveal that when near-surface PM_(2.5)concentrations are low,ARI tends to lower PM_(2.5)concentrations with decreased PBLH,which is caused by enhanced divergence or a transition from divergence to convergence in an area.ARI contributes 15%-25%toward the near-surface PM_(2.5)concentrations during the severe PM pollution period under the four synoptic patterns.Naifang BEI Xia LI Qiyuan WANG Suixin LIU Jiarui WU Jiayi LIANG Lang LIU Ruonan WANG Guohui LI 2021Advances in Atmospheric Sciences2021,38,7:2
4Necessary and Sufficient Conditions for Boundedness of Commutators of Bilinear Fractional Integral Operators on Morrey Spaces显示文摘In this paper,we obtain that b∈ BMO(R^n) if and only if the commutator[b,I_α]is bounded from the Morrey spaces L^(p_1,λ_1)(R^n)×L^(p_2,λ_2)(R^n) to L^(q,λ)(R^n),for some appropriate indices p,q,λ,μ.Also we show that b ∈ Lip_β(R^n) if and only if the commutator[b,I_α]is bounded from the Morrey spaces L^(p_1,λ_1)(R^n)×L^(p_2,λ_2)(R^n) to L^(q,λ)(R^n),for some appropriate indices p,q,λ,μ.Suixin HE Jiang ZHOU 2016Journal of Mathematical Research with Applications2016,36,6:1
5Seasonal variations and chemical characteristics of sub-micrometer particles (PM 1 ) in Guangzhou, China显示文摘Jun Tao Zhenxing Shen Chongshu Zhu Jianhua Yue Junji Cao Suixin Liu Lihua Zhu Renjian Zhang 2012Atmospheric Research2012,,:1
6Evaluation of the thermal/optical reflectance method for discrimination between char- and soot-EC显示文摘Yongming Han Junji Cao Judith C. Chow John G. Watson Zhisheng An Zhangdong Jin Kochy Fung Suixin Liu 2007Chemosphere2007,,4:1
7Astragaloside IV inhibits platelet?derived growth factor?BB?stimulatedproliferation and migration of vascular smooth muscle cells via the inhibitionof p38 MAPK signaling显示文摘Zhuo Chen Ying Cai Wenliang Zhang Xinzhou Liu Suixin Liu 2014Experimental and Therapeutic Medicine2014,,4:1
8High impact of vehicle and solvent emission on the ambient volatile organic compounds in a major city of northwest China显示文摘Monitoring of ambient volatile organic compounds(VOCs)was conducted within typical residentialcommercial area in the city of Xi’an in northwest China during typical ozone(O_(3))episodes,to investigate the major contributors to the characteristic of ambient VOCs and their impact on O_(3) production.In the residential-commercial area,diurnal variation of VOCs was highly impacted by vehicle exhaust,fuel evaporation,and local solvent use.Relative higher contributions(up to 60%)of VOCs from solvent use to the ozone formation potential were found.The present findings highlight the urgent need for restrictions on the emission of VOCs from solvent use and non-vehicle-traffic-related sources,such as oil storage.Yonggang Xue Liqin Wang Suixin Liu Yu Huang Long Chen Long Cui Yan Cheng Junji Cao 2022Chinese Chemical Letters2022,33,5:1
9Ionic composition of TSP and PM 2.5 during dust storms and air pollution episodes at Xi’an, China显示文摘Zhenxing Shen Junji Cao Richard Arimoto Zhiwei Han Renjian Zhang Yuemei Han Suixin Liu Tomoaki Okuda Shunsuke Nakao Shigeru Tanaka 2009Atmospheric Environment2009,,18:1
10Growth of nitrate contribution to aerosol pollution during wintertime in Xi'an,northwest China:Formation mechanism and effects of NH_(3)显示文摘With the strengthened controls on SO2 emissions and extensive increases in motor vehicles'exhaust,aerosol pollution shifts from sulfate-rich to nitrate-rich in recent years in Xi'an,China.To further gain insights into the factors on nitrate formation and efficiently mitigate air pollution,highly time-resolved observations of water-soluble inorganic ions(WSIIs)in PM_(2.5) were measured in a suburban area of Xi'an,China during wintertime.Hourly concentration of total WSIIs is 39.8μg m-3 on average,accounting for 50.3%of PM_(2.5) mass.In contrast to a slight decrease in the mass fraction of SO42-,NO_(3)-shows a sig-nificant increase of the PM_(2.5) contribution with the aggravation of aerosol pollution.This suggests the importance of NO_(3)-formation to haze evolution.Furthermore,homogeneous reactions govern the formation of NO_(3)-,while alkali metals such as calcium and sodium play an additional role in retaining NO_(3)-in PM_(2.5) during clean periods.However,the heterogeneous hydrolysis reaction contributed more to NO_(3)-formation during the pollution periods under high relative humidity.Our investigation reveals that temperature,relative humidity,oxidant,and ammonia emissions facilitate rapid NO_(3)-formation.Using the random forest(RF)model,NO_(3)-concentrations were successfully simulated with measured variables for the training and testing datasets(R2>0.95).Among these variables,CO,NH_(3),and N02 were found to be the main factors affecting the NO_(3)-concentrations.Compared with the period without vehicle re-striction,the contributions of NO_(3)-and NH4+to PM_(2.5) mass decreased by 5.3%and 3.4%in traffic re-striction periods,respectively.The vehicle restriction leads to the decreases of precursor gases of NO2,SO2,and NH_(3) by 12.8%,5.9%,and 27.6%,respectively.The results demonstrate collaborative emission reduction of NOx and NH_(3) by vehicle restrictions,and using new energy vehicles(or electric vehicles)can effectively alleviate particulate matter pollution in northwest China.Hui Su Ting Zhang Suixin Liu Yao Qu Huan Li Jiamao Zhou Zhuzi Zhao Qiyuan Wang Lu Li Minxia Shen Shuoyuan Chen Steven Sai Hang Ho Junji Cao 2024Particuology2024,87,4:0
11Elaborations of the influencing factors on the formation of secondary inorganic aerosols in a heavily polluted urban area of China显示文摘In this study,online water-soluble inorganic ions were detected to deduce the formation mechanism of secondary inorganic aerosol in Xianyang,China during wintertime.The dominant inorganic ions of sulfate(SO_(4)^(2-)),nitrate(NO_(3)^(-)),and ammonium(NH_(4)^(+))(the sum of those is abbreviated as SNA)accounted for 17%,21%,and 12% of PM_(2.5)mass,respectively.While the air quality deteriorated from excellent to poor grades,the precursor gas sulfur dioxide(SO_(2))of SO_(4)^(2-)increased and then decreased with a fluctuation,while nitrogen dioxide(NO_(2))and ammonia(NH_(3)),precursors of NO_(3)^(-)and NH_(4)^(+),and SNA show increasing trends.Meteorological factors including boundary layer height(BLH),temperature,and wind speed also show decline trends,except relative humidity(RH).Meanwhile,the secondary conversion ratio shows a remarkable increasing trend,indicating that there was a strong secondary transformation.From the perspective of chemical mechanisms,RH is positively correlated with sulfur oxidation ratios(SOR),nitrogen oxidation ratios(NOR),and ammonia conversion ratios,representing that the increase of humidity could promote the generation of SNA.Notably,SOR and NOR were also positively related to the ammonia.On the one hand,the low wind speed and BLH led to the accumulation of pollutants.On the other hand,the increases of RH and ammonia promoted more formations of SNA and PM_(2.5).The results advance our identification of the contributors to the haze episodes and assist to establish more efficient emission controls in Xianyang,in addition to other cities with similar emission and geographical characteristics.Shuang Wang Qiyuan Wang Ting Zhang Suixin Liu Steven Sai Hang Ho Jie Tian Hui Su Yong Zhang Luyao Wang Tingting Wu Junji Cao 2024Journal of Environmental Sciences2024,,4:0
12Trump and Sanders: Two Big Phenomena in US Presidential Election显示文摘The most compelling and discussion-triggering issue in the 2016 US general election has been the Trump and Sanders phenomena. Based on the full use of polling data, this paper offers analysis of the ideologies, policy advocacy and voter bases of Trump and Sanders, and discusses the deep-rooted causes of the phenomena.Zhou Qi Fu Suixin 2016China International Studies2016,36,4:0
13Weighted Variation Inequalities for Commutators of One-Sided Singular Integrals显示文摘The paper is devoted to investigating the weighted variation inequalities for onesided Calderon-Zygmund singular integral commutators. To be precise, we establish weighted variation inequalities for commutators generated by one-sided Calderon-Zygmund singular integral operators and Lipschitz functions. Moreover, using extrapolation of one-sided weights,the boundedness of the variation operators for these commutators is established on one-sided Triebel-Lizorkin spaces.Xin CHENG Suixin HE Jing ZHANG 2023Journal of Mathematical Research with Applications2023,43,5:0
14A Characterization of the Mixed Radial-Angularλ-Central Bounded Mean Oscillation Spaces显示文摘In this paper,we establish a characterization of the mixed radial-angularλ-central bounded mean oscillation spaces via the boundedness of the commutators Hb and its dual Hb*with a function b∈CMOL_(rad)^(p2,λ)L_(ang)^(p1)(R^(n)).Ronghui LIU Suixin HE 2023Journal of Mathematical Research with Applications2023,43,6:0
15Characteristics of PM_(2.5) and Its Reactive Oxygen Species in Heating Energy Transition and Estimation of Its Impact on the Environment and Health in China——A Case Study in the Fenwei Plain显示文摘To reduce the adverse effects of traditional domestic solid fuel,the central government began implementing a clean heating policy in northern China in 2017.Clean coal is an alternative low-cost fuel for rural households at the present stage.In this study,18 households that used lump coal,biomass,and clean coal as the main fuel were selected to evaluate the benefits of clean heating transformation in Tongchuan,an energy city in the Fenwei Plain,China.Both indoor and personal exposure(PE)samples of fine particulate matter(PM_(2.5))were synchronically collected.Compared with the lump coal and biomass groups,the indoor PM_(2.5)concentration in the clean coal group is 43.6%and 20.0%lower,respectively,while the values are 16.8%and 21.3%lower,respectively,in the personal exposure samples.PM_(2.5)-bound elements Cd,Ni,Zn,and Mn strongly correlated with reactive oxygen species(ROS)levels in all fuel groups,indicating that transition metals are the principal components to generate oxidative stress.Using a reliable estimation method,it is predicted that after the substitution of clean coal as a household fuel,the all-cause,cardiovascular,and respiratory disease that causes female deaths per year could be reduced by 16,6,and 3,respectively,in the lump coal group,and 22,8,and 3,respectively,in the biomass group.Even though the promotion of clean coal has led to impressive environmental and health benefits,the efficiencies are still limited.More environmental-friendly energy sources must be promoted in the rural regions of China.Zexuan WANG Hongmei XU Rong FENG Yunxuan GU Jian SUN Suixin LIU Ningning ZHANG Dan LI Tao WANG Linli QU Steven Sai Hang HO Zhenxing SHEN Junji CAO 2023Advances in Atmospheric Sciences2023,40,7:0
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