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39篇 您的检索式:作者名="Jingkun Jiang"
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1Hygroscopicity of particles generated from photooxidation of α-pinene under diferent oxidation conditions in the presence of sulfate seed aerosols显示文摘Smog chamber experiments were conducted to investigate the hygroscopicity of particles generated from photooxidation of α-pinene/NOx with diferent sulfate seed aerosols or oxidation conditions. Hygroscopicity of particles was measured by a tandem diferential mobility analyzer(TDMA) in terms of hygroscopic growth factor(Gf), with a relative humidity of 85%. With sulfate seed aerosols present, Gf of the aerosols decreased very fast before notable secondary organic aerosols(SOA) formation was observed, indicating a heterogeneous process between inorganic seeds and organic products might take place as soon as oxidation begins, rather than only happening after gas-aerosol partition of organic products starts. The final SOA-coated sulfate particles had similar or lower Gf than seed-free SOA. The hygroscopicity of the final particles was not dependent on the thickness but on the hygroscopicity properties of the SOA, which were influenced by the initial sulfate seed particles. In the two designed aging processes, Gf of the particles increased more significantly with introduction of OH radical than with ozone. However, the hygroscopicity of SOA was very low even after a long time of aging, implying that either SOA aging in the chamber was very slow or the Gf of SOA did not change significantly in aging. Using an aerosol composition speciation monitor(ACSM) and matrix factorization(PMF) method, two factors for the components of SOA were identified, but the correlation between SOA hygroscopicity and the proportion of the more highly oxidized factor could be either positive or negative depending on the speciation of seed aerosols present.Biwu Chu Kun Wang Hideto Takekawa Junhua Li Wei Zhou Jingkun Jiang Qinxing Ma Hong He Jiming Hao 2014Journal of Environmental Sciences2014,26,1:6
2Six-day measurement of size-resolved indoor fluorescent bioaerosols of outdoor origin in an office显示文摘Yangyang Xie Oscar A. Fajardo Weizhuo Yan Bin Zhao Jingkun Jiang 2017Particuology2017,15,2:4
3Continuous and comprehensive atmospheric observations in Beijing:a station to understand the complex urban atmospheric environment显示文摘Due to profound impact on climate and human health,air quality has attracted attention from all levels of the civil society.The key step in the provision of required tools for the society to tackle the complex air quality problem is to characterize it in a comprehensive manner with a long-term perspective.Here,we describe a continuous and comprehensive observation station and its accompanying state-ofthe-art instrumentation that was established to investigate the complex urban atmospheric environment in a rapidly developing Chinese Megacity.The station,located in downtown Beijing,aims to study air quality by identifying the major atmospheric pollutants and key processes determining their formation and loss mechanisms.A few hundreds of parameters are continuously measured with the state-of-the-art instruments,including trace gas concentrations,aerosol particle size distributions,and mass concentrations,covering aerosol particle chemical composition from molecules to micrometer-sized aerosol particles.This produced long-term,comprehensive big data with around 1�10^(11)bytes per year.In this paper,we provide an overview on the facilities of the station,the instrumentation used,the workflow of continuous observations and examples of results from 2018 to 2019 and a basis for establishing a modern long-term,comprehensive atmospheric urban observation station in other megacities.Yongchun Liu Chao Yan Zemin Feng Feixue Zheng Xiaolong Fan Yusheng Zhang Chang Li Ying Zhou Zhuohui Lin Yishou Guo Ying Zhang Li Ma Wenshuo Zhou Zhikun Liu Lubna Dada Kaspar Dallenbach Jenni Kontkanen Runlong Cai Tommy Chan Biwu Chu Wei Du Lei Yao Yonghong Wang Jing Cai Juha Kangasluoma Tom Kokkonen Joni Kujansuu Anton Rusanen Chenjuan Deng Yueyun Fu Rujing Yin Xiaoxiao Li Yiqun Lu Yiliang Liu Chaofan Lian Dongsen Yang Weigang Wang Maofa Ge Yuesi Wang Douglas R.Worsnop Heikki Junninen Hong He Veli-Matti Kerminen Jun Zheng Lin Wang Jingkun Jiang Tuukka Petaja Federico Bianchi Markku Kulmala 2020Big Earth Data2020,4,3:3
4A spectrometer for measuring particle size distributions in the range of 3 nm to 10 μm显示文摘联合电的活动性缩放并且空气动力学的缩放的一个分光计被开发在 3 nm 的范围测量喷雾器尺寸分布到 10 m。它包括盖住不同尺寸范围的三台仪器(扫描活动性粒子 sizer 的 nano (NSMPS, 360 nm ) ,常规扫描活动性粒子 sizer (RSMPS, 40700 nm ) ,并且空气动力学的粒子 sizer (APS, 550 nm10 m )) 。高电压和 NSMPS 和 RSMPS 的鞘流动用二个造家的控制框被供应。一个 LabVIEW 节目为分光计被开发自动操作。一个线性倒置方法被用于多重收费完成的正确粒子并且到从三台仪器把数据集成到宽范围的尺寸分布。实验被进行在三台仪器测量的重叠尺寸范围比较分布。在 NSMPS 和 RSMPS 之间的好同意在在数二个粒子柜台的效率为差别改正以后被完成。APS 报导的空气动力学的尺寸分布被使用一个有效密度方法变换成活动性尺寸分布。RSMPS 和 APS 测量的分布在 550700 nm 的重叠尺寸范围是一致的。在到 10 m 的 3 nm 的尺寸范围的一个完整的系列被测量用不同大小的聚苯乙烯乳胶范围的混合物产生的喷雾器表明。Jieqiong LIU Jingkun JIANG Qiang ZHANG Jianguo DENG Jiming HAO 2016Frontiers of Environmental Science & Engineering2016,10,1:3
5Crystal structure mediates mode of cell death in TiO2 nanotoxicity显示文摘Laura K. Braydich-Stolle Nicole M. Schaeublin Richard C. Murdock Jingkun Jiang Pratim Biswas John J. Schlager Saber M. Hussain 2009Journal of Nanoparticle Research2009,,6:2
6Fabrication, microstructure and properties of highly transparent Nd:YAG laser ceramics显示文摘Jiang Li Yusong Wu Yubai Pan Wenbin Liu Liping Huang Jingkun Guo 2008Optical Materials2008,,1:2
7Effects of two transition metal sulfate salts on secondary organic aerosol formation in toluene/NOx photooxidation显示文摘Aerosol phase reactions play a very important role on secondary organic aerosol (SOA) formation, and metal-containing aerosols are important components in the atmosphere. In this study, we tested the effects of two transition metal sulfate salts, manganese sulfate (MnSO4) and zinc sulfate (ZnSO4), on the photochemical reactions of a toluene/NOx photooxidation system in a 2 m3 smog chamber. By comparing photochemical reaction products of experiments with and without transition metal sulfate seed aerosols, we evaluated the effects of transition metal sulfate seed aerosols on toluene consumption, NOx conversion and the formation of ozone and SOA. MnSO4 and ZnSO4 seed aerosols were found to have similar effects on photochemical reactions, both enhance the SOA production, while showing negligible effects on the gas phase compounds. These observations are consistent when varying metal sulfate aerosol concentrations. This is attributed to the catalytic effects of MnSO4 and ZnSO4 seed aerosols which may enhance the formation of condensable semivolatile compounds. Their subsequent partitioning into the aerosol phase leads to the observed SOA formation enhancement.Biwu CHU Jiming HAO Junhua LI Hideto TAKEKAWA Kun WANG Jingkun JIANG 2013Frontiers of Environmental Science & Engineering2013,7,1:2
8Fabrication of transparent Yb, Cr: YAG ceramics by a solid - state reaction method显示文摘Yusong Wu Jiang Li Fagui Qiu Yubai Pan Qian Liu Jingkun Guo 2006Ceramics International2006,32,7:1
9Long- term trend of haze pollution and impact of particulate matter in the Yangtze River Delta, China显示文摘CHENG Zhen WANG Shuxiao JIANG Jingkun 2013Environmental Pollution2013,182,:1
10Preparation and properties of transparent Eu:YAG fluorescent ceramics with different doping concentrations显示文摘Qiang Liu Yong Yuan Jiang Li Jing Liu Chen Hu Min Chen Li Lin Huamin Kou Yun Shi Wenbin Liu Haohong Chen Yubai Pan Jingkun Guo 2014Ceramics International2014,,:1
11Long-term trend of haze pollution and impact of particulate matter in the Yangtze River Delta, China显示文摘Zhen Cheng Shuxiao Wang Jingkun Jiang Qingyan Fu Changhong Chen Bingye Xu Jianqiao Yu Xiao Fu Jiming Hao 2013Environmental Pollution2013,,:1
12Role of surface area,primary particlesize,and crystal phase on titanium dioxidenanoparticle dispersion properties显示文摘Komkrit Suttiponparnit Jingkun Jiang PratimBiswas 2011NanoscaleRes Lett2011,6,:1
13Microstructure of composite YAG cryst-al/ceramics 显示文摘Benxe Jiang Enbin Liu Tongde Huang Jiang Li Yubai Pan Jingkun Guo 2009Ceramics International2009,35,:1
14Source apportionment of PM 2.5 nitrate and sulfate in China using a source-oriented chemical transport model显示文摘Hongliang Zhang Jingyi Li Qi Ying Jian Zhen Yu Dui Wu Yuan Cheng Kebin He Jingkun Jiang 2012Atmospheric Environment2012,,:1
15Influence of fluorides on phase transition of α-Al 2 O 3 formation显示文摘Jiang Li Yusong Wu Yubai Pan Wenbin Liu Jingkun Guo 2006Ceramics International2006,,:1
16Synthesis of nano-sized Yb 3 Al 5 O 12 powders by the urea co-precipitation method显示文摘Yusong Wu Jiang Li Yubai Pan Qian Liu Jingkun Guo 2007Ceramics International2007,,1:1
17Characteristics and health impacts of particulate matter pollution in China (2001- 2011 ) 显示文摘CHENG Zhen JIANG Jingkun FAJARDO O 2013Atmos Environ2013,65,:1
18Anthropogenic mercury emissions in China显示文摘David G. Streets Jiming Hao Ye Wu Jingkun Jiang Melissa Chan Hezhong Tian Xinbin Feng 2005Atmospheric Environment2005,,40:1
19Application of smog chambers in atmospheric process studies显示文摘Smog chamber experimental systems,which have been widely used in laboratory simulation for studying atmospheric processes,are comprehensively reviewed in this paper.The components,development history,main research topics and main achievements of smog chambers are introduced.Typical smog chambers in the world,including their volumes,wall materials,light sources and features,are summarized and compared.Key factors of smog chambers and their influences on the simulation of the atmospheric environment are discussed,including wall loss,wall emission and background pollutants.The features of next-generation smog chambers and their application prospect in future studies of the atmospheric environment are also outlined in this paper.Biwu Chu Tianzeng Chen Yongchun Liu Qingxin Ma Yujing Mu Yonghong Wang Jinzhu Ma Peng Zhang Jun Liu Chunshan Liu Huaqiao Gui Renzhi Hu Bo Hu Xinming Wang Yuesi Wang Jianguo Liu Pinhua Xie Jianmin Chen Qian Liu Jingkun Jiang Junhua Li Kebin He Wenqing Liu Guibin Jiang Jiming Hao Hong He 2022National Science Review2022,9,2:1
20Charged fraction and electrostatic collection of ultrafine and submicrometer particles formed during O2-CO2 coal combustion显示文摘Achariya Suriyawong Christopher J Hogan Jr Jingkun Jiang 0,,06:1
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