搜索结果: 1-15 共查到“理学 H2SO4”相关记录23条 . 查询时间(0.078 秒)
基于BrO3--MnSO4-H2SO4-丙二酸体系的中药电化学指纹图谱
化学振荡 中草药 电化学指纹图谱
2013/8/26
提出了BrO3--MnSO4-H2SO4-丙二酸化学振荡反应体系, 在考察各组分浓度对空白体系稳定性和振荡特征参数影响的基础上, 获得了黄芪、陈皮、葛根等7 种中草药的电化学指纹图谱. 结果表明, 这些指纹图谱可以用于中草药的分析和鉴别, 且快速、准确. 并探讨了中草药振荡行为的原因及其机理.
One conceivable mechanism of UV-light induced SO2 Oxidation to H2SO4
One conceivable mechanism of UV-light SO2 Oxidation to H2SO4
2010/8/12
The electron-excited chemistry of sulfur dioxide oxidation induced by UV irradiation of air with trace O3 and SO2 is considered. The importance of this mechanism is evaluated based on recent laborator...
Particle formation in the Arctic free troposphere during the ASTAR 2004 campaign: a case study on the influence of vertical motion on the binary homogeneous nucleation of H2SO4/H2O
Arctic free troposphere ASTAR 2004 campaign binary homogeneous nucleation of H2SO4/H2O
2010/2/21
During the ASTAR (Arctic Study of Tropospheric Aerosol and Radiation) campaign nucleation mode particles (4 to 13 nm) were quite frequently observed at altitudes below 4000 m. However, in the upper fr...
氨基酸-BrO-3-Mn2+-H2SO4-丙酮体系的振荡反应。
非均相温和条件下AlCl3/H2SO4高效催化一锅法合成蒽醌衍生物
蒽醌 路易斯酸 硫酸 一锅法合成
2009/9/14
成功研发了一种与已报道的方法相比合成蒽醌衍生物产量更高的新方法,该方法具有原料易得,收率高,反应时间短,反应条件温和以及操作容易等特点. 合成的蒽醌衍生物的结构由物性数据和光谱结果确定.
Gaseous（DMS, MSA, SO2, H2SO4 and DMSO）and particulate（sulfate and methanesulfonate）sulfur species over the northeastern coast of Crete
MSA SO2 H2SO4 DMSO northeastern coast of Crete
2009/3/11
A detailed study of the levels, the temporal and diurnal variability of the main compounds involved in the biogenic sulfur cycle was carried out in Crete (Eastern Mediterranean) during the Mediterrane...
A novel model to predict the physical state of atmospheric H2SO4/NH3/H2O aerosol particles
novel model atmospheric H2SO4/NH3/H2O aerosol particles
2009/3/11
The physical state of the tropospheric aerosol is largely unknown despite its importance for cloud formation and for the aerosol's radiative properties. Here we use detailed microphysical laboratory m...
The Hohenpeissenberg aerosol formation experiment（HAFEX）：a long-term study including size-resolved aerosol, H2SO4, OH, and monoterpenes measurements
Hohenpeissenberg aerosol formation experiment HAFEX size-resolved aerosol H2SO4
2009/3/10
Ambient aerosol size distributions (>3 nm) and OH, H2SO4, and terpene concentrations were measured from April 1998 to August 2000 at a rural continental site in southern Germany. New particle formatio...
The effects of H2SO4 and (NH4)2SO4 treatments on the chemistry of soil drainage water and pine seedlings in forest soil microcosms
acidification manipulation nitrogen deposition drainage microcosms forest
2009/3/5
An experiment comparing effects of sulphuric acid and reduced N deposition on soil water quality and on chemical and physical growth indicators for forest ecosystems is described. Six H2SO4 and (NH4)...
Impact of H2SO4/H2O coating and ice crystal size on radiative properties of sub-visible cirrus
H2SO4/H2O coating ice crystal size radiative properties sub-visible cirrus
2009/1/16
Recent laboratory experiments showed that at conditions resembling those near the tropopause region, small ice particles can be coated by a liquid H2SO4/H2O over-layer formed after the freezing of dil...
Estimating the NH3:H2SO4 ratio of nucleating clusters in atmospheric conditions using quantum chemical methods
NH3:H2SO4 quantum chemical methods
2008/12/10
We study the ammonia addition reactions of H2SO4·NH3 molecular clusters containing up to four ammonia and two sulfuric acid molecules using the ab initio method RI-MP2 (Resolution of Identity 2nd orde...
SO2 oxidation products other than H2SO4 as a trigger of new particle formation. Part 1: Laboratory investigations
SO2 oxidation products H2SO4
2008/11/25
Mechanistic investigations of atmospheric H2SO4 particle formation have been performed in a laboratory study taking either H2SO4 from a liquid reservoir or using the gas-phase reaction of OH radicals ...
Laboratory studies of H2SO4/H2O binary homogeneous nucleation from the SO2+OH reaction: evaluation of the experimental setup and preliminary results
H2SO4/H2O binary homogeneous nucleation SO2+OH reaction
2008/11/17
Binary homogeneous nucleation (BHN) of sulphuric acid and water (H2SO4/H2O) is one of the most important atmospheric nucleation processes, but laboratory observations of this nucleation process are ve...
摘要 本文报道了与生命代谢过程密切相关的中间物参与的乳酸(以下简称LA)-丙酮(以下简称Act)-BrO3^--Mn^2^+-H2SO4新型化学振荡体系, 考察了振荡体系中诸反应物的初始浓度范围及影响因素, 获得诱导期、振荡周期、振荡寿命所对应的表观活化参数EIN, EP, EL分别为60.68kJ.mol^-^1, 61.03kJ.mol^-^1,135.80kJ.mol^-^1。分析了诱导期的...
KBrO3-CH3CH(NH2)CO2H-MnSO4-[Fe(phen)3]SO4-H2SO4体系的化学振荡反应
氨基酸 硫酸 苯 P 铁络合物 钾化合物 硫酸盐 化学振荡 三苯基 丙氨酸 锰化合物 溴酸盐 硫酸根络合物 金属离子
2007/12/19
摘要 本文首次报道须在两种金属离子同时作用下的振荡反应─KBrO3-CH3CH(NH2)CO2H-MnSO4-[F3(phen)3]SO4-H2SO4体系的振荡反应, 对反应产物作了分析, 研究了两种金属离子在振荡反应中的不同作用, Mn^2^+起催化氧化丙氨酸以产生丙酮酸的作用, 而[Fe(phen)3]^2^+则是丙酮酸-BZ型反应的催化剂。研究了温度变化对振荡反应的影响, 从而得出振荡反应各...