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中国科学院地化所在嫦娥五号月壤撞击玻璃中发现多种来源的OH和分子H2O(图)
太阳风 演化 遥感探测
2024/6/25
月表水的来源和保存是月球科学研究的重要问题,对月球水资源的分布和提取利用、认识无大气天体表面水的形成演化以及类地行星水来源等问题具有重要意义。前期的遥感探测和样品分析揭示了月壤中普遍存在太阳风成因水(OH/H2O),然而太阳风成因水的演化以及月表分子H2O的存在与否仍存在争议,限制了对月表水形成和保存过程的认识,需结合月球样品分析开展深入的研究。
优异的热稳定性和耐毒性等关键性能指标对开发实用型的单原子催化剂至关重要。铂基催化剂凭借其优异的催化活性被广泛应用于VOCs的催化氧化,然而,实际工况下VOCs废气组分复杂,铂单原子催化剂由于高暴露的原子活性位点极易与H2O、SO2等杂质气体大面积接触而发生中毒失活的现象。因此,研究人员重点致力于提高单原子Pt催化剂在VOCs催化燃烧领域的耐毒性研究。特别是含水工况下,单原子Pt基催化剂极易失活,限...
H2O-NaCl-CO2三元混合流体在岩浆、变质和热液系统中很常见,在成岩和成矿中发挥着重要作用。造山型金矿是世界上最为重要的金矿床类型,矿化以多期H2O-NaCl-CO2±CH4流体叠加成矿为特征。衡量热液系统中流体相平衡和热力学性质(PVTx),对分析成矿流体演化和成矿作用发挥着重要作用。然而早期大量的模拟研究,基于其简便性,多以H2O-NaCl和H2O-CO2二元系统近似描述地质系统中的热液...
H2O-NaCl-CO2三元混合流体在岩浆、变质和热液系统中很常见,在成岩和成矿中发挥着重要作用。造山型金矿是世界上最为重要的金矿床类型,矿化以多期H2O-NaCl-CO2±CH4流体叠加成矿为特征。衡量热液系统中流体相平衡和热力学性质(PVTx),对分析成矿流体演化和成矿作用发挥着重要作用。
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...
A watershed moment in understanding how H2O conducts electricity
watershed moment H2O conducts electricity
2016/12/13
Scientists have taken spectroscopic snapshots of nature’s most mysterious relay race: the passage of extra protons from one water molecule to another during conductivity.The finding represents a major...
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...
近日,The Journal of Chemical Physics编辑部发来通知,由中科院大连化学物理研究所傅碧娜、张东辉两人发表于该杂志2012年期刊上关于D原子和水分子交换反应的全维量子动力学研究的文章(J. Chem. Phys. 136, 194301 (2012))被选入2012年度编辑推荐特刊(2012 Editors’ Choice)(http://jcp.aip.org/ec20...
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...