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Particuology 2020年第4期18卷 18-25页

作者： Qiong Liu Xin Liu Tongqiang Liu Yanming kang Yonghang chen Jiming Li Hua Zhang College of environmental Science and Engineering Donghua UniversityShanghaiChina College of Information Science and Technology Donghua UniversityShanghaiChina Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric sciences Lanzhou UniversityLanzhouChina State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijingChina

Although the concentration of atmospheric particulate matter in Shanghai has declined in recent years,aerosols remain one of the major pollutants affecting air ***,spatio-seasonal variation in aerosol optical properties and aerosol types were studied overa 10-year period(2.06-2.15)in Shanghai,china,using satellite data from Moderate Resolution Imaging Spectroradiometer(MODIS)and CloudAerosol Lidar with Orthogonal Polarization(CALIOP).The average aerosol optical depth values for central urban and suburban areas of Shanghai were between 0.9 and *** seasonal variation in aerosol concentrations occurred,causing strongest attenuation in summer and weakest attenuation in *** dust,polluted continental(urban/industrial)and smoke aerosols were the main aerosol *** dust aerosols occurred in the Shanghai area at higher altitudes(greater than 3 km)in spring,related to dusty weather in the north;while in winter,smoke aerosols occurred at high altitudes,related to haze pollution in the *** aerosols detected in autumn were mainly from local sources,comprising polluted dust,polluted continental,and smoke *** in Shanghai clearly reflect both local and regional sources at different times.

关键词： Aerosol optical depth(AOD) Aerosol type Attenuation Seasonal variation Vertical distribution

Grazing greatly reduces the temporal stability of soil cellulolytic fungal community in a steppe on the Tibetan Plateau

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Journal of environmental sciences 2022年第11期34卷 48-57页

作者： Fei Wang Weidong Kong Mukan Ji kang Zhao Hao chen Linyan Yue Xiaobin Dong Key Laboratory of Alpine Ecology Institute of Tibetan Plateau ResearchChinese Academy of Sciences(CAS)Beijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100039China CAS center for Excellence in Tibetan Plateau Earth sciences Chinese Academy of SciencesBeijing 100101China School of Life Science Shanxi Normal UniversityLinfen 041004China State Key Laboratory of Earth Surface Processes and Resource Ecology College of Resources Science and TechnologyBeijing Normal UniversityBeijing 100875China

Excessive livestock grazing degrades grasslands ecosystem stability and sustainability by reducing soil organic matter and plant productivity. However, the effects of grazing on soil cellulolytic fungi, an important indicator of the degradation process for soil organic matter,remain less well understood. Using T-RFLP and sequencing methods, we investigated the effects of grazing on the temporal changes of cellulolytic fungal abundance and community structure in dry steppe soils during the growing months from May to September, on the Tibetan Plateau using T-RFLP and sequencing methods. The results demonstrated that the abundance of soil cellulolytic fungi under grazing treatment changed significantly from month to month, and was positively correlated with dissolved organic carbon(DOC) and soil temperature, but negatively correlated with soil p H. Contrastingly, cellulolytic fungal abundance did not change within the fencing treatment(ungrazed conditions). Cellulolytic fungal community structure changed significantly in the growing months in grazed soils,but did not change in fenced soils. Grazing played a key role in determining the community structure of soil cellulolytic fungi by explaining 8.1% of the variation, while p H and DOC explained 4.1% and 4.0%, respectively. Phylogenetically, the cellulolytic fungi were primarily affiliated with Ascomycota(69.65% in relative abundance) and Basidiomycota(30.35%).Therefore, grazing substantially reduced the stability of soil cellulolytic fungal abundance and community structure, as compared with the fencing treatment. Our finding provides a new insight into the responses of organic matter-decomposing microbes for grassland managements.

关键词： Cellulolytic fungal community cbhI Stability Grazing Dryland soil Tibetan Plateau

Hormonal Regulation of Leaf Morphogenesis in Arabidopsis

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Journal of Integrative Plant Biology 2007年第1期49卷 75-80页

作者： Lin-Chuan Li Ding-Ming kang Zhang-Liang chen Li-Jia Qu National Laboratory for Protein Engineering and Plant Genetic Engineering Peking-Yale Joint Research Center for Plant Molecular Genetics and AgroBiotechnology College of Life Sciences Peking University Beijing 100871 China Key Laboratory of Crop Genomics and Genetic Improvement of Ministry of Agriculture/Key laboratory of Crop Genetic Improvement of beijing City College of Agronomy and Biotechnology China Agricultural University Beijing 100094 China

Leaf morphogenesis is strictly controlled not only by intrinsic genetic factors, such as transcriptional factors, but also by environmental cues, such as light, water and pathogens. Nevertheless, the molecular mechanism of how leaf morphogenesis is regulated by genetic programs and environmental cues is far from clear. Numerous series of events demonstrate that plant hormones, mostly small and simple molecules, play crucial roles in plant growth and development, and in responses of plants to environmental cues such as light. With more and more genetics and molecular evidence obtained from the model plant Arabidopsis, several fundamental aspects of leaf morphogenesis including the initiation of leaf primordia, the determination of leaf axes, the regulation of cell division and expansion in leaves have been gradually unveiled. Among these phytohormones, auxin is found to be essential in the regulation of leaf morphogenesis.

关键词： auxin curly leaf hormonal regulation leaf morphogenesis leaf shape

铈基催化剂用于CO选择性催化还原NO_(x)的研究进展

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化学研究与应用 2024年第5期36卷 942-954页

作者：康嘉霓邓双王海强苏发兵陈卓苗熊雨苏环境基准与风险评估国家重点实验室中国环境科学研究院北京100012 浙江大学环境与资源学院环境技术研究所浙江杭州310058 浙江省工业锅炉炉窑烟气污染控制工程技术研究中心浙江杭州310058 中国科学院过程工程研究所北京100190

CO选择性催化还原NO_(x)技术(CO-SCR)是利用烟气中CO作为还原剂,将NO_(x)还原为N_(2.;与目前普遍应用的氨选择性催化脱硝(NH_(3)-SCR)相比,避免了氨还原剂的使用及逃逸等问题,且同时脱除CO和NO_(x)大气污染物,极具应用潜力。稀土金属铈... 详细信息

CO选择性催化还原NO_(x)技术(CO-SCR)是利用烟气中CO作为还原剂,将NO_(x)还原为N_(2.;与目前普遍应用的氨选择性催化脱硝(NH_(3)-SCR)相比,避免了氨还原剂的使用及逃逸等问题,且同时脱除CO和NO_(x)大气污染物,极具应用潜力。稀土金属铈氧化物因其优异的氧传递能力,可作为载体或助催化剂有效提高COSCR催化反应性能。本文系统比较以氧化铈(CeO_(2.)作为载体和活性组分的两大类催化剂体系的CO-SCR脱硝性能,探讨烟气成分(O_(2.、SO_(2.和H_(2.O)对铈基催化剂CO-SCR活性的影响,揭示了催化剂的构效关系;并且归纳总结了铈基催化剂上CO-SCR可能的反应机理。可通过载体改性、活性金属掺杂、形貌调控、制备条件优化等手段,开发具有较宽反应温度区间及抗氧抗硫性能的铈基CO-SCR脱硝催化剂。

关键词： CO选择性催化还原烟气脱硝氮氧化物一氧化碳铈基催化剂

Association between ApoE Polymorphism and Type 2.Diabetes: A Meta-Analysis of 59 Studies

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Biomedical and environmental sciences 2019年第11期32卷 823-838页

作者： chen Da Wei SHI Ji kang LI Yun YANG Yu REN Shu Ping Department of Radiation Protection School of Public HealthJilin UniversityChangchun 130021JilinChina Department of Epidemiology and Statistics School of Public HealthJilin UniversityChangchun 130021JilinChina Department of Ophthalmology China-Japan Union HospitalJilin UniversityChangchun 130033JilinChina Function Experiment center of College of Basic Medicine Jilin UniversityChangchun 130021JilinChina Department of Occupational and environmental Health School of Public HealthJilin UniversityChangchun 130021JilinChina

Objective To identify the important risk factors for type 2.Diabetes Mellitus(T2.DM) and develop effective strategies to address the problem of T2.DM. Our study aimed to evaluate the association between apolipoprotein E(Apo E) genetic polymorphism and type 2.diabetes, and to provide clues for the etiology of T2.*** Based on the criteria of inclusion and exclusion, we extracted, pooled, analyzed and assessed the case-control studies of Apo E polymorphism and T2.DM published in Pub Med, Web of Science,Medline, Wan Fang, VIP, and CNKI databases by R soft-ware(version 3.4.3). We used Random-effect models when heterogeneity was present in between-study, and fixed-effect models *** We had 59 studies covering 6,872.cases with T2.DM and 8,2.0 controls, and compared the alleles and genotypes of Apo E between cases and controls. When we conducted a comparison between Apo E ε4 and ε3 alleles, we produced a pooled OR of 1.18(95% CI: 1.09-1.2.;P 2.ε2.genotype displayed a possible association with T2.DM(OR = 1.46;95% CI: 1.11-1.93;P = 0.007), ε3/ε4 genotype showed a 1.11-fold risk(OR = 1.11;95% CI: 1.01-1.2.;P = 0.039) and ε4/ε4 genotype had a1.71-fold risk of developing T2.DM(OR = 1.71;95% CI: 1.33-2.19;P 2.DM: allele ε4 and genotypes(ε2.ε2. ε3/ε4, and ε4/ε4) are associated with the increased risk for the development of T2.DM, and they may be risk factors for T2.DM.

关键词： Apolipoprotein E Polymorphism Type 2.diabetes Meta-analysis

Concentration,sources and wet deposition of dissolved nitrogen and organic carbon in the Northern Indo-Gangetic Plain during monsoon

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Journal of environmental sciences 2021年第4期33卷 37-52页

作者： Hemraj Bhattarai Lekhendra Tripathee Shichang kang Chhatra Mani Sharma Pengfei chen Junming Guo Prakriti Sharma Ghimire Earth System Science Programme and Graduate Division of Earth and Atmospheric sciences The Chinese University of Hong KongHong KongChina State Key Laboratory of Cryospheric Science Northwest Institute of Eco-environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchCASBeijing 100101China chinese academy of {2.(CAS)center for Excellence in Tibetan Plateau Earth {2. Beijing 100085China Himalayan Environment Research Institute(HERI) KathmanduNepal Central Department of environmental Science Tribhuvan UniversityKathmanduNepal Kathmandu center for Research and Education(KCRE) KathmanduNepal

Precipitation represents an important phenomenon for carbon and nitrogen ***,the concentrations and fluxes of dissolved organic carbon(DOC)and total dissolved nitrogen(TDN)with their potential sources were analyzed in wet precipitation during summer monsoon from the Northern Indo-Gangetic Plain(IGP),important but neglected *** volume-weighted mean(VWM)concentration of DOC and TDN were 687.04 and 12.0.2.μg/L,***,the VWM concentration of major ions were in a sequence of NH_(4)^(+)>Ca^(2.)>SO_(4)^(2.)>Na^(+)>K^(+)>NO_(3)~->Cl~->Mg^(2.)>F~->NO_(2.~-,suggesting NH_(4)^(+)and Ca^(2.)from agricultural activities and crustal dust played a vital role in precipitation ***,the wet deposition flux of DOC and TDN were 9.95 and 17.06 kg/(ha year),*** wet deposition flux of inorganic nitrogen species such as NH_(4)^(+)-N and NO_(3)^(-)-N were 14.31 and 0.47 kg/(ha year),respectively,demonstrating the strong influence of emission sources and precipitation *** attribution from different analysis suggested the influence of biomass burning on DOC and anthropogenic activities(agriculture,animal husbandry)on nitrogenous *** air-mass back trajectory analysis indicated the influence of air masses originating from the Bay of Bengal,which possibly carried marine and anthropogenic pollutants along with the biomass burning emissions to the sampling *** study bridges the data gap in the less studied part of the northern IGP region and provides new information for policy makers to deal with pollution control.

关键词： Precipitation chemistry Dissolved organic carbon Total dissolved nitrogen Major ions Indo-Gangetic Plain

Seasonality of carbonaceous aerosol composition and light absorption properties in Karachi,Pakistan

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Journal of environmental sciences 2020年第4期32卷 286-296页

作者： Pengfei chen Shichang kang Chaman Gul Lekhendra Tripathee Xiaoxiang Wang Zhaofu Hu Chaoliu Li Tao Pu State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and Resources(CAS)Lanzhou 730000ChinaChinese Academy of Sciences CAS center for Excellence in Tibetan Plateau Earth sciences Beijing 100101China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchCASBeijing 100101China Reading academy Nanjing University of Information Science and TechnologyNanjingJiangsu210044China

Characteristics of carbonaceous aerosol(CA)and its light absorption properties are limited in Karachi,which is one of the most polluted metropolitan cities in South *** study presents a comprehensive measurement of seasonality of CA compositions and mass absorption cross-section(MAC)of elemental carbon(EC)and water-soluble organic carbon(WSOC)in total suspended particles(TSP)collected from February 2.15 to March 2.17 in the southwest part of *** average TSP,organic carbon(OC),and EC concentrations were extremely high with values as 391.0±2.7.0,37.2.2..0,and 8.53±6.97μg/m3,*** components showed clear seasonal variations with high concentrations occurring during fall and winter followed by spring and ***42.,NO3-,K+,and NH4+showed similar variations with CA,implying the significant influence on atmospheric pollutants from anthropogenic *** lower OC/EG ratio(4.2.±2.50)compared with remote regions further indicates fossil fuel combustion as a primary source of ***,sea salt and soil dust are important contribution sources for *** average MAC of EC(632.nm)and WSOC(365 nm)were 6.56±2.70 and 0.97±0.37 m2.g,*** is comparable to that in urban areas but lower than that in remote regions,indicating the significant influence of local *** showed opposite distribution with EC,further suggesting that OC was significantly affected by local fossil fuel *** addition,dust might be an important factor increasing MACwsoc particularly during spring and summer.

关键词： Air pollution Organic carbon Elemental carbon Light absorption Pakistan

Nitrogenous and carbonaceous aerosols in PM_(2.5) and TSP during pre-monsoon:Characteristics and sources in the highly polluted mountain valley

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Journal of environmental sciences 2022年第5期34卷 10-24页

作者： Hemraj Bhattarai Lekhendra Tripathee Shichang kang Pengfei chen Chhatra Mani Sharma Kirpa Ram Junming Guo Maheswar Rupakheti Earth System Science Programme and Graduate Division of Earth and Atmospheric sciences The Chinese University of Hong KongHong KongChina State Key Laboratory of Cryospheric Science Northwest Institute of Eco-environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchCASBeijing 100101China CAS center for Excellence in Tibetan Plateau Earth sciences Beijing 100085China Himalayan Environment Research Institute(HERI) Kathmandu 44602Nepal Central Department of environmental sciences Tribhuvan UniversityKathmandu 44613Nepal Institute of Environment and Sustainable Development Banaras Hindu UniversityVaranasi 221005India Institute for Advanced Sustainability Studies Potsdam 14467Germany

This study reports for the first time a comprehensive analysis of nitrogenous and carbona-ceous aerosols in simultaneously collected PM_(2.5) and TSP during pre-monsoon(March-May 2.18)from a highly polluted urban Kathmandu Valley(KV)of the Himalayan *** mean mass concentration of PM_(2.5)(12..8 μg/m^(3))was only-2.%of TSP mass(558.7 μg/m^(3))indicating the dominance of coarser mode ***,the mean concentration as well as fractional contributions of water-soluble total nitrogen(WSTN)and carbonaceous species reveal their predominance in find-mode *** mean mass concentration of WSTN was 17.43±4.70 μg/m^(3)(14%)in PM_(2.5) and 2..64±8.07 μg/m^(3)(5%)in ***,the fractional contribution of total carbonaceous aerosols(TCA)is much higher in PM_(2.5)(~34%)than that in TSP(~2.%).The relatively low OC/EC ratio in PM_(2.5)(3.03±1.47)and TSP(4.64±1.73)suggests fossil fuel combustion as the major sources of carbonaceous aerosols with contributions from secondary organic ***-day air mass back trajectories sim-ulated with the HYSPLIT model,together with MODIS fire counts indicate the influence of local emissions as well as transported pollutants from the Indo-Gangetic Plain region to the south of the Himalayan *** component analysis(PCA)also suggests a mixed contribution from other local anthropogenic,biomass burning,and crustal *** re-sults highlight that it is necessary to control local emissions as well as regional transport while designing mitigation measures to reduce the KV's air pollution.

关键词： Nitrogenous aerosol Carbonaceous aerosols Major ions Particulate pollution Kathmandu Valley(KV)

Epigenetic regulation in plant abiotic stress responses

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Journal of Integrative Plant Biology 2020年第5期62卷 563-580页

作者： Ya-Nan Chang chen Zhu Jing Jiang Huiming Zhang Jian-kang Zhu cheng-Guo Duan Shanghai center for Plant Stress Biology and center of Excellence in Molecular Plant {2. Chinese Academy of Sciences201602China University of chinese academy of sciences Beijing 100049China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIN 47907USA

In eukaryotic cells,gene expression is greatly influenced by the dynamic chromatin *** mechanisms,including covalent modifications to DNA and histone tails and the accessibility of chromatin,create various chromatin states for stress-responsive gene expression that is important for adaptation to harsh environmental *** studies have revealed that many epigenetic factors participate in abiotic stress responses,and various chromatin modifications are changed when plants are exposed to stressful *** this review,we summarize recent progress on the cross-talk between abiotic stress response pathways and epigenetic regulatory pathways in *** review focuses on epigenetic regulation of plant responses to extreme temperatures,drought,salinity,the stress hormone abscisic acid,nutrient limitations and ultraviolet stress,and on epigenetic mechanisms of stress memory.

关键词： stress ultraviolet extreme

A Core Genome Multilocus Sequence Typing Scheme for Proteus mirabilis

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Biomedical and environmental sciences 2023年第4期36卷 343-352页

作者： chen Sheng Lin kang Yu Tong LIANG Yi He QIU Xiao Tong LI Zhen Jun School of Public Health Shanxi Medical UniversityTaiyuan 030001ShanxiChina State Key Laboratory for Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China

Objective A core genome multilocus sequence typing(cgMLST)scheme to genotype and identify potential risk clonal groups(CGs)in Proteus *** In this work,we propose a publicly available cgMLST scheme for *** using chew *** total 72.complete *** genomes,representing the diversity of this species,were used to set up a cgMLST scheme targeting 1,842.genes,635 unfinished(contig,chromosome,and scaffold)genomes were used for its *** We identified a total of 2.5 CGs from 695 *** strains with regional distribution *** these,159 unique CGs were distributed in 16 ***2. and CG3 carried large numbers of shared and unique antibiotic resistance *** virulence genes(papC,papD,papE,papF,papG,papH,papI,papJ,and papK)related to the P fimbrial operon that cause severe urinary tract infections were only found in *** CGs require attention due to potential *** This research innovatively performs high-resolution molecular typing of *** using whole-genome sequencing technology combined with a bioinformatics pipeline(chewBBACA).We found that the CGs of *** showed regional distribution *** expect that our research will contribute to the establishment of cgMLST for ***.

关键词： Proteus mirabilis CgMLST Genotyping Clonal evolution ChewBBACA