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- W4285087159 abstract "Abstract The transformation of aerosol proteinaceous matter (PrM) has potentially adverse environmental and health effects. The origins and atmospheric processes of PrM have obtained an increasing interest, but there are still large uncertainties. Although aerosol liquid water (ALW) has been found to be vital in numerous atmospheric processes, its impact on atmospheric degradation of PrM remains poorly understood. ALW, proteins, and low molecular weight PrM (LMW PrM, <10 kDa) were investigated in fine aerosols (PM 2.5 ) collected in urban and suburban Nanchang (Eastern China) over a 1‐year period. The average concentrations of proteins and LMW PrM in the urban center were higher than those in the suburban area. Urban PrM tended to increase from cool season to warm season, which was opposite to the case of suburban PrM. These differences could be attributed to varied sources and atmospheric processes of PrM. Increase in ALW was prominent from the suburban site to the urban site, which was attributable to increased anthropogenic nitrate and sulfate. LMW PrM can be degraded from higher molecular weight PrM by ozone. Furthermore, correlation analysis between LMW PrM and ozone and ALW suggested that the enhanced ALW in the urban center facilitated the ozone‐induced LMW PrM release. The ALW‐related protein degradation was further supported by ozone exposure experiments with bovine serum albumin and PM 2.5 samples under dry condition. Our findings suggest that ALW is a crucial promoter during PrM degradation by ozone, providing new insights into atmospheric transformation of proteins." @default.
- W4285087159 created "2022-07-14" @default.
- W4285087159 creator A5011262218 @default.
- W4285087159 creator A5018103197 @default.
- W4285087159 creator A5037545845 @default.
- W4285087159 creator A5046915861 @default.
- W4285087159 creator A5062525305 @default.
- W4285087159 date "2022-08-05" @default.
- W4285087159 modified "2023-10-16" @default.
- W4285087159 title "Proteinaceous Matter and Liquid Water in Fine Aerosols in Nanchang, Eastern China: Seasonal Variations, Sources, and Potential Connections" @default.
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