Search Results - "Chak, K"

Heterogeneous Oxidation of SO2 in Sulfate Production during Nitrate Photolysis at 300 nm: Effect of pH, Relative Humidity, Irradiation Intensity, and the Presence of Organic Compounds by Gen, Masao, Zhang, Ruifeng, Huang, Dan Dan, Li, Yongjie, Chan, Chak K

“…Heterogeneous oxidation of SO2 is one of the promising mechanisms to account for high loading of sulfate during severe haze periods in China. Our earlier work…”
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Enhanced Sulfate Production by Nitrate Photolysis in the Presence of Halide Ions in Atmospheric Particles by Zhang, Ruifeng, Gen, Masao, Huang, Dandan, Li, Yongjie, Chan, Chak K

“…Heterogeneous oxidation of SO2 is an effective production pathway of sulfate in the atmosphere. We recently reported a novel pathway for the heterogeneous…”
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Air pollution in mega cities in China by Chan, Chak K., Yao, Xiaohong

“…Due to its rapidly expanding economic and industrial developments, China is currently considered to be the engine of the world's economic growth. China's…”
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Global Survey of Antibiotic Resistance Genes in Air by Li, Jing, Cao, Junji, Zhu, Yong-guan, Chen, Qing-lin, Shen, Fangxia, Wu, Yan, Xu, Siyu, Fan, Hanqing, Da, Guillaume, Huang, Ru-jin, Wang, Jing, de Jesus, Alma Lorelei, Morawska, Lidia, Chan, Chak K, Peccia, Jordan, Yao, Maosheng

“…Despite its emerging significant public health concern, the presence of antibiotic resistance genes (ARGs) in urban air has not received significant attention…”
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The oxidative potential of fresh and aged elemental carbon-containing airborne particles: a review by Liu, Yangyang, Chan, Chak K

“…Elemental carbon is often found in ambient particulate matter (PM), and it contributes to the PM's oxidative potential (OP) and thus poses great health…”
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Production of Formate via Oxidation of Glyoxal Promoted by Particulate Nitrate Photolysis by Zhang, Ruifeng, Gen, Masao, Fu, Tzung-May, Chan, Chak K

“…Particulate nitrate photolysis can produce oxidants (i.e., OH, NO2, and NO2 –/HNO2) in aqueous droplets and may play a potential role in increased atmospheric…”
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Reactive Uptake of Glyoxal by Ammonium-Containing Salt Particles as a Function of Relative Humidity by Gen, Masao, Huang, Dan Dan, Chan, Chak K

“…Reactions between dissolved ammonia and carbonyls, which form light-absorbing species in atmospheric particles, can be accelerated by actively removing water…”
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Primary and secondary organic aerosol from heated cooking oil emissions by Liu, Tengyu, Wang, Zhaoyi, Wang, Xinming, Chan, Chak K

“…Cooking emissions have been identified as a source of both primary organic aerosol (POA) and secondary organic aerosol (SOA). To examine the characteristics of…”
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Multiphase Photochemistry of Iron-Chloride Containing Particles as a Source of Aqueous Chlorine Radicals and Its Effect on Sulfate Production by Gen, Masao, Zhang, Ruifeng, Li, Yongjie, Chan, Chak K

“…Photolysis of iron chlorides is a well-known photolytic source of Cl• in environmental waters. However, the role of particulate chlorine radicals (Cl• and Cl2…”
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Theoretical investigation on the oxidation mechanism of methylglyoxal in the aqueous phase by Zhang, Yu, Zhang, Ruifeng, Chan, Chak K., He, Maoxia, Wei, Bo, Liu, Huaqing

“…The oxidation mechanism of methylglyoxal (CH3COCHO) in the aqueous phase plays a crucial role in the formation of secondary organic aerosols (SOA). To date,…”
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Evaporation-Induced Transformations in Volatile Chemical Product-Derived Secondary Organic Aerosols: Browning Effects and Alterations in Oxidative Reactivity by Zhou, Liyuan, Liang, Zhancong, Qin, Yiming, Chan, Chak K.

“…Volatile chemical products (VCPs) are increasingly recognized as significant sources of volatile organic compounds (VOCs) in urban atmospheres, potentially…”
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Real-time chemical characterization of atmospheric particulate matter in China: A review by Li, Yong Jie, Sun, Yele, Zhang, Qi, Li, Xue, Li, Mei, Zhou, Zhen, Chan, Chak K.

“…Atmospheric particulate matter (PM) pollution has become a major health threat accompanying the rapid economic development in China. For decades, filter-based…”
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Nitrate Photolysis in Mixed Sucrose–Nitrate–Sulfate Particles at Different Relative Humidities by Liang, Zhancong, Zhang, Ruifeng, Gen, Masao, Chu, Yangxi, Chan, Chak K

“…Atmospheric particles can be viscous. The limitation in diffusion impedes the mass transfer of oxidants from the gas phase to the particle phase and hinders…”
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A review of experimental techniques for aerosol hygroscopicity studies by Tang, Mingjin, Chan, Chak K, Li, Yong Jie, Su, Hang, Ma, Qingxin, Wu, Zhijun, Zhang, Guohua, Wang, Zhe, Ge, Maofa, Hu, Min, He, Hong, Wang, Xinming

“…Hygroscopicity is one of the most important physicochemical properties of aerosol particles and also plays indispensable roles in many other scientific and…”
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Single-particle Raman spectroscopy for studying physical and chemical processes of atmospheric particles by Liang, Zhancong, Chu, Yangxi, Gen, Masao, Chan, Chak K

“…Atmospheric particles experience various physical and chemical processes and change their properties during their lifetime. Most studies on atmospheric…”
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Formation and Evolution of aqSOA from Aqueous-Phase Reactions of Phenolic Carbonyls: Comparison between Ammonium Sulfate and Ammonium Nitrate Solutions by Huang, Dan Dan, Zhang, Qi, Cheung, Heidi H. Y, Yu, Lu, Zhou, Shan, Anastasio, Cort, Smith, Jeremy D, Chan, Chak K

“…We investigate the effects of sulfate and nitrate on the formation and evolution of secondary organic aerosol formed in the aqueous phase (aqSOA) from…”
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Reactive Uptake of Dimethylamine by Ammonium Sulfate and Ammonium Sulfate–Sucrose Mixed Particles by Chu, Yangxi, Chan, Chak K

“…Short-chain alkyl amines can undergo gas-to-particle partitioning via reactive uptake by ammonium salts, whose phases have been thought to largely influence…”
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Heterogeneous SO2 Oxidation in Sulfate Formation by Photolysis of Particulate Nitrate by Gen, Masao, Zhang, Ruifeng, Huang, Dan Dan, Li, Yongjie, Chan, Chak K

“…Heterogeneous oxidation of sulfur dioxide (SO2) is suggested to be one of the most important pathways for sulfate formation during extreme haze events in…”
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Secondary Organic Aerosol Formation from Urban Roadside Air in Hong Kong by Liu, Tengyu, Zhou, Liyuan, Liu, Qianyun, Lee, Berto P, Yao, Dawen, Lu, Haoxian, Lyu, Xiaopu, Guo, Hai, Chan, Chak K

“…Motor vehicle emissions are an important but poorly constrained source of secondary organic aerosol (SOA). Here, we investigated in situ SOA formation from…”
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Electrospray surface-enhanced Raman spectroscopy (ES-SERS) for probing surface chemical compositions of atmospherically relevant particles by Gen, Masao, Chan, Chak K

“…We present electrospray surface-enhanced Raman spectroscopy (ES-SERS) as a new approach to measuring the surface chemical compositions of atmospherically…”
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