搜索结果: 1-15 共查到“知识库 理学 H2O”相关记录353条 . 查询时间(0.14 秒)
电离层H2O释放扰动效应的数值模拟研究
化学物质释放 电离层扰动 电离层洞 扩展F
2018/5/4
为充分研究化学物质在电离层释放的扰动效应和后期发展效果，基于化学物质在电离层的扩散模型、化学反应和电离层扩展F的控制模型，通过电离层H2O的释放，研究电子e，H2O，O+和H2O+共4种粒子的分布状态，分析点源、多源和线源释放对电离层的扰动效果，比较不同高度、不同量和不同时间释放的影响结果，模拟夜间释放后期所激发的扩展F发展差异.结果表明，H2O在电离层释放后，能有效耗散背景电子形成空洞，O+和H...
Herschel observations of ortho- and para-oxidaniumyl (H2O+) in spiral arm clouds toward Sagittarius B2(M) *,**
H2O+ massive star forming
2014/12/22
H2O+ has been observed in its ortho- and para- states toward the massive star forming core Sgr B2(M), located close to the Galactic center. The observations show absorption in all spiral arm clouds be...
Detection of OH+ and H2O+ towards Orion KL
OH+ H2O+
2014/12/20
We report observations of the reactive molecular ions OH+, H2O+, and H3O+ towards Orion KL with Herschel/HIFI. All three N = 1-0 fine-structure transitions of OH+ at 909, 971, and 1033 GHz and both fi...
为了探索缺电子B-H键作为质子供体形成双氢键复合物的溶剂化效应，分别采用DFT-B3LYP/6-311++G**和CCSD(T)/6-311++G**方法对NCBBH…HNa和CNBBH…HNa及其水合物NCBBH…HNa(H2O)n和CNBBH…HNa(H2O)n(n=1~5)进行了结构优化和相互作用能计算，并利用AIM (atom in molecule)方法分析了H…H键特征，借助前线分子轨...
Stability of Mg-sulphate minerals in the presence of smectites: Possible mineralogical controls on H2O and nutrient cycling on Mars
Stability Mg-sulphate minerals presence of smectites mineralogical controls H2O nutrient cycling Mars
2012/3/30
Hydrated sulphate minerals, including kieserite (MgSO4·H2O), gypsum (CaSO4·2H2O), and bassanite (CaSO4·~0.5H2O), have been detected on Mars (Gendrin et al., 2005; Wray et al., 2010), and polyhydrated ...
石英在热水溶液中的溶解度对地球化学和岩石学的研究都极为重要。我们提出一个能够适用于H2O-CO2-NaCl复杂流体成分,高温高压(0~1000℃,0~1.5GPa)条件下的石英溶解度计算模型,形式如下:
logmSiO2=A(T)+B(T)·logMH2O/VH2O*+C(t)·logxH2O
其中A(T)、B(T)、C(t)均为温度T(K)和t(℃)的多项式。xH2O和VH2O*分别代表流...
The properties and polarization of the H2O and CH3OH maser environment of NGC7538-IRS1
Stars: formation - masers: water, methanol - polarization - magnetic fi elds - ISM: individual: NGC7538
2011/10/17
NGC7538 is a complex massive star-forming region. The region is composed of several radio continuum sources, one of which is IRS1, a high-mass protostar, from which a 0.3 pc molecular bipolar outflow ...
Observation of H2O in a strongly lensed Herschel-ATLAS source at z=2.3
Galaxies: high-redshift – Galaxies: starburst – Galaxies: active – Infrared: galaxies – Submillimeter: galaxies – Radiolines: galaxies
2011/10/19
The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to st...
凹凸棒石是一种性能优良的吸附剂,对小分子极性气体具有很好的吸附性如SO2,H2S和NH3等。适当的热处理可以提高其脱除SO2的能力。文章采用热处理改性的凹凸棒石作为脱硫剂脱除烟气中的SO2,同时考察不同吸附温度下O2浓度和H2O含量对凹凸棒石烟气脱硫的影响。结果表明：在所考察的温度范围（50~200℃）内O2的存在没有影响凹凸棒石吸附SO2的吸附容量;当吸附温度低于100℃时,H2O与SO2存在竞...
Warming Power of CO2 and H2O: Correlations with Temperature Changes
Global Warming CO2 Vapor Greenhouse
2013/3/6
The dramatic and threatening environmental changes announced for the next decades are the result of models whose main drive factor of climatic changes is the increasing carbon dioxide in the atmospher...
两个新颖的三维稀土多羧酸配位聚合物: [Ln(ox)0.5-(bta)0.5(H2O)2]n的水热合成、结构和荧光性质
稀土配合物 1,2,4,5-均苯四甲酸 水热合成 晶体结构 荧光性质
2013/8/23
采用水热方法合成两种混合多羧酸稀土配位聚合物[Ln(ox)0.5-(bta)0.5(H2O)2]n (Ln = Sm (1), Gd (2) ) (ox = 草酸, bta =1,2,4,5-均苯四甲酸), 并通过元素分析、红外光谱、X射线单晶衍射及X射线粉末衍射(PXRD)对配合物进行了表征. 结构分析表明, 配合物1 和2属同构. 混合连接体1,2,4,5-均苯四甲酸和草酸连接相应的稀土金属离...
以α-Na7PW11O39·nH2O, LaCl3·7H2O 和(CH3)4NCl 为原料, 利用常规水溶液方法合成了 2:2 型二聚的单缺位Keggin 结构稀土衍生物[(CH3)4N]4[PW11O39H2La(H2O)4]2·3H2O (1). X 射线 单晶衍射结果表明, 该晶体属三斜晶系, P-1 空间群, 晶胞参数: a = 1.35383(10) nm, b = 1.60687(12...
The HDO/H2O ratio in gas in the inner regions of a low-mass protostar
astrochemistry — stars formation — protoplanetary disks —ISM
2010/11/15
The HDO/H2O abundance ratio is thought to be a key diagnostic on the evolution of water during the star- and planet-formation process and thus on its origin on Earth. We here present millimeter-wavele...
Tenfold enhancement of MeV Proton generation by a moderate ultra-short laser interaction with H2O nano-wire targets
MeV Proton generation moderate ultra-short laser H2O nano-wire targets
2010/11/12
Compact sources of high energy protons (50-500MeV) are expected to be key technology in a wide range of scientific applications. Particularly promising is the target normal sheath acceleration (TNSA) ...
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 ...