搜索结果: 1-15 共查到“大气化学 OH”相关记录27条 . 查询时间(0.172 秒)
近日，安光所张为俊研究团队在大气OH自由基总反应性测量研究方面取得新进展，相关研究成果《时间分辨激光闪光法拉第旋转光谱仪：一种用于OH自由基总反应性测量和自由基动力学研究的新工具》以封面文章形式发表于Analytical Chemistry上。OH自由基是大气中最重要的氧化剂，其快速循环反应决定着大气中主要污染物的生成和去除。揭示OH自由基转化机制是大气氧化性和污染成因研究的核心挑战，其中OH自由...
近日，中国科学院合肥物质科学研究员安徽光学精密机械研究所研究员张为俊课题组、强磁场科学中心研究员陈文革课题组和万瑞冷电科技有限公司合作，建立了国际上首个基于超导磁体的磁旋转吸收光谱测量OH自由基装置，实现了对OH自由基106molecule/cm3的实时原位测量。OH自由基是大气中重要的氧化剂，对流层大气中几乎所有的可被氧化的痕量气体都主要通过与OH自由基反应而被转化、去除。因此，大气中OH自由基...
近期，中科院安徽光学精密机械研究所张为俊研究员课题组在OH自由基与C6不饱和醇的大气化学反应过程研究方面取得重要进展。相关研究工作于2015年8月14日在线发表在美国化学学会（ACS）出版的Environmental Science & Technology（SCI一区）上。
近期，中国科学院合肥物质科学研究院安徽光学精密机械研究所研究员张为俊课题组在OH自由基与C6不饱和醇的大气化学反应过程研究方面取得新进展。相关研究工作于2015年8月14日在线发表在美国化学学会（ACS）出版的Environmental Science & Technology上。
对流层大气氧化能力普遍规律的认识，是理解区域臭氧和灰霾污染以及全球碳氮循环和辐射收支等重大环境问题的理论基础。OH自由基化学作为对流层大气氧化能力的主要构成部分，其反应机理研究一直是国际大气化学研究的热点与前沿。
Do vibrationally excited OH molecules affect middle and upper atmospheric chemistry?
OH molecules middle and upper atmospheric chemistry
2010/10/21
Except for a few reactions involving electronically excited molecular or atomic oxygen or nitrogen, atmospheric chemistry modelling usually assumes that the temperature dependence of reaction rates is...
Laboratory simulation for the aqueous OH-oxidation of methyl vinyl ketone and methacrolein: significance to the in-cloud SOA production
Laboratory simulation the aqueous OH-oxidation methyl vinyl ketone the in-cloud SOA production
2010/10/11
Increasing evidence suggests that secondary organic aerosol (SOA) is formed through aqueous phase reactions in atmospheric clouds. In the present study, the aqueous oxidation of methyl vinyl ketone (M...
The hydroxyl radical (OH) plays a key role in the oxidation of trace gases in the troposphere. However, observations of OH and the closely related hydroperoxy radical (HO2) have been sparse, especiall...
Laboratory study on new particle formation from the reaction OH + SO2: influence of experimental conditions, H2O vapour, NH3 and the amine tert-butylamine on the overall process
Laboratory study new particle formation the reaction OH + SO2 H2O vapour NH3 the amine tert-butylamine the overall process
2010/8/16
Nucleation experiments starting from the reaction of OH radicals with SO2 have been performed in the IfT-LFT flow tube under atmospheric conditions at 293±0.5 K for a relative humidity of 13–61%. The ...
Influence of relative humidity and temperature on the production of pinonaldehyde and OH radicals from the ozonolysis of α-pinene
relative humidity and temperature pinonaldehyde and OH radicals α-pinene
2010/8/16
The ozonolysis of α-pinene has been investigated under dry and humid conditions in the temperature range of 243–303 K. The results provided new insight into the role of water and temperature in the de...
Vertical transport rates and concentrations of OH and Cl radicals in the Tropical Tropopause Layer from observations of CO2 and halocarbons: implications for distributions of long- and short-lived chemical species
Vertical transport rates OH and Cl radicals the Tropical Tropopause Layer long- and short-lived chemical species
2010/8/16
Rates for large-scale vertical transport of air in the Tropical Tropopause Layer (TTL) were determined using high-resolution, in situ observations of CO2 concentrations in the tropical upper troposphe...
Chemical evolution of secondary organic aerosol from OH-initiated heterogeneous oxidation
Chemical evolution secondary organic aerosol OH-initiated heterogeneous oxidation
2010/8/13
The heterogeneous oxidation of laboratory Secondary Organic Aerosol (SOA) particles by OH radicals was investigated. SOA particles, produced by reaction of α-pinene and O3, were exposed to OH radicals...
Tropospheric photooxidation of CF3CH2CHO and CF3(CH2)2CHO initiated by Cl atoms and OH radicals
Tropospheric photooxidation CF3CH2CHO Cl atoms OH radicals
2010/2/21
The absolute rate coefficients for the tropospheric reactions of chlorine (Cl) atoms and hydroxyl (OH) radicals with CF3CH2CHO and CF3(CH2)2CHO were measured as a function of temperature (263–371 K) a...
The chemistry of OH and HO2 radicals in the boundary layer over the tropical Atlantic Ocean
OH and HO2 radicals boundary layer tropical Atlantic Ocean
2010/2/21
Fluorescence Assay by Gas Expansion (FAGE) has been used to detect ambient levels of OH and HO2 radicals at the Cape Verde Atmospheric Observatory, located in the tropical Atlantic marine boundary lay...
Kinetic double-layer model of aerosol surface chemistry and gas-particle interactions (K2-SURF): Degradation of polycyclic aromatic hydrocarbons exposed to O3, NO2, H2O, OH and NO3
Kinetic double-layer model aerosol surface chemistry gas-particle interactions K2-SURF
2009/12/31
We present a kinetic double-layer surface model (K2-SURF) that describes the degradation of polycyclic aromatic hydrocarbons (PAHs) on aerosol particles exposed to ozone, nitrogen dioxide, water vapor...