搜索结果: 1-15 共查到“理学 HO2”相关记录16条 . 查询时间(0.125 秒)
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...
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...
Measurements of OH and HO2 yields from the gas phase ozonolysis of isoprene
OH and HO2 yields gas phase ozonolysis isoprene
2010/2/21
The reactions of ozone with alkenes are an important source of hydroxyl (OH) radicals; however, quantification of their importance is hindered by uncertainties in the absolute OH yield. Hydroxyl radic...
介质阻挡放电等离子体中·OH和HO2·自由基的数值模拟计算
介质阻挡放电 ·OH HO2· 化学动力学 模拟
2010/1/5
在介质阻挡放电等离子体N2/O2/H2O/HCHO体系中通过解Boltzmann方程, 得到电子能量分布函数, 利用得到的电子能量分布函数计算电子-分子碰撞反应速率常数. 然后把有关的反应速率常数带入速率方程, 计算得到该体系在介质阻挡放电时,·OH、HO2·和电子的浓度随时间的演变以及·OH、HO2·浓度随H2O、O2摩尔分数的变化, 并将模拟结果与实验值进行了对比, 两者符合得较好.
CH3CF2O2与HO2自由基反应机理的理论研究
反应通道 过渡态 活化能 CH3CF2O2
2009/11/26
用密度泛函理论(DFT)的B3LYP方法，在6-311G、6-311+G(d)、6-311++G(d, p) 基组水平上研究了CH3CF2O2与HO2自由基反应机理. 结果表明, CH3CF2O2与HO2自由基反应存在两条可行的通道. 通道CH3CF2O2＋HO2→IM1→TS1→CH3CF2OOH＋O2的活化能为77.21 kJ226;mol－1，活化能较低，为主要反应通道，其产物是O2和...
Measurements of OH and HO2 concentrations during the MCMA-2006 field campaign–Part 2: Model comparison and radical budget
OH HO2 Model comparison radical budget
2009/9/22
Measurements of hydroxyl (OH) and hydroperoxy (HO2) radicals were made during the Mexico City Metropolitan Area (MCMA) field campaign as part of the MILAGRO (Megacity Initiative: Local and Global Rese...
Measurements of OH and HO2 concentrations during the MCMA-2006 field campaign – Part 1: Deployment of the Indiana University laser-induced fluorescence instrument
OH HO2 MCMA-2006 field campaign laser-induced fluorescence instrument
2009/3/13
Measurements of tropospheric hydroxyl (OH) and hydroperoxy (HO2) radicals were made during the MCMA (Mexico City Metropolitan Area) field campaign as part of the MILAGRO (Megacity Initiative: Local an...
OH and HO2 chemistry in clean marine air during SOAPEX-2
OH HO2 chemistry clean marine air SOAPEX-2
2009/2/26
Model-measurement comparisons of HOx in extremely clean air ([NO]<3 ppt) are reported. Measurements were made during the second Southern Ocean Photochemistry Experiment (SOAPEX-2), held in austral sum...
Concentrations of OH and HO2 radicals during NAMBLEX: measurements and steady state analysis
OH and HO2 radicals steady state analysis
2009/1/6
OH and HO2 concentrations were measured simultaneously at the Mace Head Atmospheric Research Station in the summer of 2002 during the NAMBLEX (North Atlantic Marine Boundary Layer EXperiment) field ca...
OH and HO2 chemistry during NAMBLEX: roles of oxygenates, halogen oxides and heterogeneous uptake
OH HO2 chemistry NAMBLEX roles of oxygenates halogen oxides heterogeneous uptake
2009/1/5
Several zero-dimensional box-models with different levels of chemical complexity, based on the Master Chemical Mechanism (MCM), have been used to study the chemistry of OH and HO2 in a coastal environ...
Observations of OH and HO2 radicals in coastal Antarctica
OH HO2 radicals coastal Antarctica
2008/12/17
OH and HO2 radical concentrations have been measured in the boundary layer of coastal Antarctica for a six-week period during the austral summer of 2005. The measurements were performed at the British...
Direct detection of OH formation in the reactions of HO2 with CH3C(O)O2 and other substituted peroxy radicals
OH HO2 CH3C(O)O2 substituted peroxy radicals
2008/11/17
This work details the first direct observation of OH as a product from (R1): HO2+CH3C(O)O2→(products), which has generally been considered an atmospheric radical termination process. The technique of ...
Impact of the new HNO3-forming channel of the HO2+NO reaction on tropospheric HNO3, NOx, HOx and ozone
HNO3-forming channel HO2+NO reaction tropospheric HNO3 NOx HOx ozone
2008/11/13
We have studied the impact of the recently observed reaction NO+HO2→HNO3 on atmospheric chemistry. A pressure and temperature-dependent parameterisation of this minor channel of the NO+HO2→NO2+OH reac...
CF3C(O)O2+HO2反应机理的理论研究
氟代酰基过氧自由基 氟代羧酸 DFT 反应机理
2008/11/12
用量子化学密度泛函方法, 在CCSD(T)/cc-pVDZ//B3LYP/6-31+G(d,p)水平上研究了氟代乙酰过氧自由基[CF3C(O)O2]和氢过氧自由基(HO2)的反应机理. 研究结果表明, 反应物优先生成能量低的单态反应络合物, 进而经过相对较低的反应势垒生成臭氧和氟代羧酸, 即CF3C(O)O2+HO2→CF3C(O)OH+O3为主要反应. 该结论与实验结果一致.