Recent Progress in Atmospheric Chemistry Research in China: Establishing a Theoretical Framework for the “Air Pollution Complex”

Advances in Atmospheric Sciences, Год журнала: 2023, Номер 40(8), С. 1339 - 1361

Опубликована: Апрель 28, 2023

Atmospheric chemistry research has been growing rapidly in China the last 25 years since concept of "air pollution complex" was first proposed by Professor Xiaoyan TANG 1997. For papers published 2021 on air (only included Web Science Core Collection database were considered), more than 24 000 authored or co-authored scientists working China. In this paper, we review a limited number representative and significant studies atmospheric few years, including (1) sources emission inventories, (2) chemical processes, (3) interactions with meteorology, weather climate, (4) between biosphere atmosphere, (5) data assimilation. The intention not to provide complete all progress made but rather serve as starting point for learning about advances reviewed paper have enabled theoretical framework complex be established, provided robust scientific support highly successful control policies China, created great opportunities education, training, career development many graduate students young scientists. This further highlights that developing low-income countries are heavily affected can benefit from these advances, whilst at same time acknowledging challenges still remain hopefully addressed over next decades.

Язык: Английский

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TGF-β-driven LIF expression influences neutrophil extracellular traps (NETs) and contributes to peritoneal metastasis in gastric cancer

Cell Death and Disease, Год журнала: 2024, Номер 15(3)

Опубликована: Март 15, 2024

Abstract Gastric cancer (GC), notorious for its poor prognosis, often advances to peritoneal dissemination, a crucial determinant of detrimental outcomes. This study intricately explores the role TGFβ-Smad-LIF axis within tumor microenvironment in propagating metastasis, with specific emphasis on molecular mechanism instigating Neutrophil Extracellular Traps (NETs) formation and encouraging GC cellular functions. Through blend bioinformatics analyses, utilizing TCGA GEO databases, meticulous vivo vitro experiments, LIF was identified as pivotally associated notably, enhancing NETs through neutrophil stimulation. Mechanistically, TGF-β substantiated elevate expression via activation Smad2/3 complex, culminating consequently, propelling metastasis GC. revelation uncovers novel potential therapeutic target, promising new avenue managing mitigating metastatic propensities.

Язык: Английский

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Aqueous-phase chemistry of atmospheric phenolic compounds: A critical review of laboratory studies

The Science of The Total Environment, Год журнала: 2022, Номер 856, С. 158895 - 158895

Опубликована: Сен. 18, 2022

Язык: Английский

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Effects of Relative Humidity and Photoaging on the Formation, Composition, and Aging of Ethylbenzene SOA: Insights from Chamber Experiments on Chlorine Radical-Initiated Oxidation of Ethylbenzene

ACS Earth and Space Chemistry, Год журнала: 2024, Номер 8(4), С. 675 - 688

Опубликована: Апрель 1, 2024

The oxidation of alkyl-substituted aromatic molecules produces oxygenated volatile organic compounds (OVOCs) and secondary aerosols (SOA) that are major components ambient urban air. Despite their ubiquity, the impacts variable conditions, such as relative humidity (RH) actinic exposure, on physicochemical processes contribute to SOA formation still subject ongoing research refinement. In this work, we perform laboratory environmental chamber experiments use an I– FIGAERO–CIMS examine molecular composition high-NOx ethylbenzene products in response varied (dry 40% RH, 60% RH) during either dark aging or photoaging (with ∼354 nm UV-A lights). Experiments performed a mixed Cl OH radical environment. Compared chemistry, chemistry forms greater amount nitroaromatic by enhancing benzaldehyde phenolic H abstraction while also forming several organochlorine may serve tracers for which C2H3ClO2 (presumably chloroacetic acid) appears be most consistent stable. Organonitrate (ON) undergo hydrolytic photolytic losses. Nitroaromatic condense more efficiently under humid presumably due relatively high solubility hydroxy dihydroxy molecules, but do not appear stable condensed phase photoaging. Small oxygenates make up substantial portion increases at RH (due increased uptake) photolysis fragmentation). Photoaging initially leads degree oligomerization before continued eventual loss these other compounds. Our results show substantially impact evolution many gas- particle-phase species produced suggest factors can exert strong control over evolution, particularly regions.

Язык: Английский

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A Review of Biogenic Volatile Organic Compounds from Plants: Research Progress and Future Prospects

Toxics, Год журнала: 2025, Номер 13(5), С. 364 - 364

Опубликована: Апрель 30, 2025

Biogenic volatile organic compounds (BVOCs) emitted by plants contribute to secondary air pollution through photochemical reactions in sunlight. Due the influence of multiple factors, accurately characterizing and quantifying emission BVOCs from plant sources is challenging, which poses significant obstacles effective management control BVOCs. Therefore, this paper summarizes mechanisms plants, explores primary factors influencing variations rates these compounds, evaluates advantages limitations contemporary "measurement-modeling" methods for BVOC emissions. It concluded that current measurement techniques still need be further developed meet criteria simplicity, affordability, high precision simultaneously, terms modeling prediction studies, there a lack in-depth research on atmospheric chemistry synergistic effects factors. Finally, it suggested leverage interdisciplinary strengths develop advanced technologies high-resolution models monitoring compounds. Additionally, strategically selecting low-BVOC tree species pollution-vulnerable urban areas-contingent rigorous ecological assessments-combined with stringent controls anthropogenic precursors (e.g., (AVOCs)) could serve as complementary measure mitigate pollution.

Язык: Английский

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Occurrence, migration and environmental effects of neglected BTEX in the coastal multiple environments

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138555 - 138555

Опубликована: Май 1, 2025

Язык: Английский

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Investigation into the differences and relationships between gasSOA and aqSOA in winter haze pollution on Chongming Island, Shanghai, based on VOCs observation

Environmental Pollution, Год журнала: 2022, Номер 316, С. 120684 - 120684

Опубликована: Ноя. 16, 2022

Язык: Английский

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Seasonal volatile organic compound dynamics in urban and forest environments in Thailand: Implications for air quality and secondary pollutants

Environmental Pollution, Год журнала: 2024, Номер unknown, С. 125565 - 125565

Опубликована: Дек. 1, 2024

Язык: Английский

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Polyurethane Foam Face Masks as a Dosimeter for Quantifying Personal Exposure to Airborne Volatile and Semi-Volatile Organic Compounds

Chemical Research in Toxicology, Год журнала: 2022, Номер 35(9), С. 1604 - 1613

Опубликована: Авг. 16, 2022

Airborne volatile organic compounds (VOCs) and semi-volatile (SVOCs) are commonly quantitated by collecting the analytes on solid sorbent tubes or passive air samplers, followed solvent extraction instrumental analysis, grab bag/canister measurements. We report herein a user-friendly sampling method breathing through polyurethane foam (PUF) face masks to collect airborne VOCs SVOCs for chemical analysis. Specifically, dibasic esters, phthalate polycyclic aromatic hydrocarbons, linalool, nicotine trapped PUF were gas chromatography–mass spectrometry analysis as model SVOCs. Results showed that amount of these is proportional exposure duration. After cross-validation parallel using XAD-2 packed tubes, was used quantitate in variety indoor outdoor environments with varying concentrations analytes, temperature, humidity, wind speed. Because pollution considered major cause many human diseases premature deaths developed mask high trapping efficiencies both SVOCs, it believed will find wide application assessing pollution-associated disease risks possible extension more classes when coupled suitable detection methods.

Язык: Английский

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Explication on distribution patterns of volatile organic compounds in petro-chemistry and oil refineries of China using a species-transport model and health risk assessment

The Science of The Total Environment, Год журнала: 2022, Номер 863, С. 160707 - 160707

Опубликована: Дек. 6, 2022

Язык: Английский

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