搜索结果: 1-15 共查到“理学 HOx”相关记录18条 . 查询时间(0.062 秒)
Coupling of HOx, NOx and halogen chemistry in the antarctic boundary layer
HOx, NOx and halogen chemistry the antarctic boundary layer
2010/11/3
A modelling study of radical chemistry in the coastal Antarctic boundary layer, based upon observations performed in the course of the CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interf...
Improved global modelling of HOx recycling in isoprene oxidation: evaluation against the GABRIEL and INTEX-A aircraft campaign measurements
HOx recycling isoprene oxidation the GABRIEL and INTEX-A aircraft campaign measurements
2010/10/21
Stimulated by recent important developments regarding the oxidation chemistry of isoprene, this study evaluates and quantifies the impacts of different mechanism updates on the boundary layer concentr...
HOx observations over West Africa during AMMA: impact of isoprene and NOx
HOx observations West Africa AMMA isoprene NOx
2010/10/11
Aircraft OH and HO2 measurements made over West Africa during the AMMA field campaign in summer 2006 have been investigated using a box model constrained to observations of long-lived species and phys...
Impacts of mechanistic changes on HOx formation and recycling in the oxidation of isoprene
mechanistic changes HOx formation the oxidation of isoprene
2010/9/14
Recently reported model-measurement discrepancies for the concentrations of the HOx radical species (OH and HO2) in locations characterized by high emission rates of isoprene have indicated possible d...
Turbulent exchange and segregation of HOx radicals and volatile organic compounds above a deciduous forest
HOx radicals volatile organic compounds a deciduous forest
2010/8/16
The eddy covariance method was applied for the first time to estimate fluxes of OH and HO2 together with fluxes of isoprene, the sum of methyl vinyl ketone (MVK) and methacrolein (MACR) and the sum of...
Chemistry of hydrogen oxide radicals (HOx) in the Arctic troposphere in spring
hydrogen oxide radicals the Arctic troposphere spring
2010/8/13
We use observations from the April 2008 NASA ARCTAS aircraft campaign to the North American Arctic, interpreted with a global 3-D chemical transport model (GEOS-Chem), to better understand the sources...
Evaluated kinetic and photochemical data for atmospheric chemistry: Volume I - gas phase reactions of Ox, HOx, NOx and SOx species
Evaluated kinetic atmospheric chemistry gas phase reactions
2009/3/5
This article, the first in the series, presents kinetic and photochemical data evaluated by the IUPAC Subcommittee on GasKinetic Data Evaluation for Atmospheric Chemistry. It covers the gas phase and ...
The role of transition metal ions on HOx radicals in clouds: a numerical evaluation of its impact on multiphase chemistry
transition metal ions HOx radicals clouds multiphase chemistry
2009/2/20
A new modelling study of the role of transition metal ions on cloud chemistry has been performed. Developments of the Model of Multiphase Cloud Chemistry (M2C2; Leriche et al., 2001) are described, in...
Assessment of the reduction methods used to develop chemical schemes: building of a new chemical scheme for VOC oxidation suited to three-dimensional multiscale HOx-NOx-VOC chemistry simulations
chemical schemes VOC oxidation three-dimensional multiscale HOx-NOx-VOC chemistry simulations
2009/2/17
The objective of this work was to develop and assess an automatic procedure to generate reduced chemical schemes for the atmospheric photooxidation of volatile organic carbon (VOC) compounds. The proc...
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...
Observations of HNO3, ΣAN, ΣPN and NO2 fluxes: evidence for rapid HOx chemistry within a pine forest canopy
HNO3 HOx chemistry forest canopy
2008/11/13
Measurements of exchange of reactive nitrogen oxides between the atmosphere and a ponderosa pine forest in the Sierra Nevada Mountains are reported. During winter, we observe upward fluxes of NO2, and...
Observations of the effects of temperature on atmospheric HNO3, ΣANs, ΣPNs, and NOx: evidence for a temperature-dependent HOx source
Observations of the effects of temperature atmospheric HNO3 ΣANs ΣPN NOx
2008/11/3
We describe observations of atmospheric reactive nitrogen compounds including NO, NO2, total peroxy nitrates, total alkyl nitrates, and HNO3 and their correlation with temperature. The measurements we...
On the vertical distribution of boundary layer halogens over coastal Antarctica: implications for O3, HOx, NOx and the Hg lifetime
vertical distribution boundary layer halogens coastal Antarctica Hg
2008/10/30
A one-dimensional chemical transport model has been developed to investigate the vertical gradients of bromine and iodine compounds in the Antarctic coastal boundary layer (BL). The model has been ap...
同源盒基因(Hox)与哺乳动物生殖
Hox基因 生殖 哺乳动物
2008/6/29
哺乳动物的同源盒基因（Hox）与果蝇的同源异形基因是同源基因，该基因编码的DNA片段含183碱基对，转录由61个氨基酸残基组成的蛋白质保守结构域，称同源异型域.Hox基因碱基顺序及在染色体中的位置都是高度保守的.Hox基因在体节结构分化等空间信息调控中起着重要作用，按特异的空间模式赋予每一体节其自身的特点.近年来的研究表明，Hox基因不但影响胚胎发育，而且与成体生殖系统分化有关，在着床期子...