搜索结果: 76-90 共查到“理学 Hydrogen”相关记录234条 . 查询时间(0.031 秒)
Enhanced stability of hydrogen atoms at the graphene/graphane interface of nanoribbons
Enhanced stability of hydrogen atoms graphene/graphane interface of nanoribbons
2010/11/24
The thermal stability of graphene/graphane nanoribbons (GGNRs) is investigated using density functional theory. It is found that the energy barriers for the diffusion of hydrogen atoms on the zigzag a...
The mechanism of cold- and pressure-denaturation are matter of debate. Some models propose that when denaturation occurs more hydrogen bonds between the molecules of hydration water are formed. Other...
Effects of Varying the Three-Body Molecular Hydrogen Formation Rate in Primordial Star Formation
galaxies formation stars formation ISM H II regions cos-mology theory
2010/11/12
The transformation of atomic hydrogen to molecular hydrogen through three-body reactions is a crucial stage in the collapse of primordial, metal-free halos,where the rst generation of stars (Populati...
The thermodynamic and kinetic properties of hydrogen dimers on graphene
thermodynamic kinetic properties graphene
2010/11/23
The thermodynamic and kinetic properties of hydrogen adatoms on graphene are important to the materials and devices based on hydrogenated graphene. Hydrogen dimers on graphene with coverages varying f...
Quantum Incompressibility of a Freely Falling Hydrogen Atom in a Circular Rydberg State, and a Gravitationally-Induced Charge Separation Effect in Superconducting Systems
Quantum Hydrogen Atom Circular Rydberg State Gravitationally-Induced Charge Separation Effect
2010/12/21
Freely falling point-like objects converge toward the center of the Earth. Hence the gravitational field of the Earth is inhomogeneous, and possesses a tidal component. The free fall of an extended qu...
Old White Dwarf Stars with Some Hydrogen -- Cooling Curves
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/6
We present theoretical analysis on old white dwarf stars with \emph{some} hydrogen, that possess a mass of surface hydrogen from $1\times10^{-11}M_{\sun}$ to $1\times10^{-7}M_{\sun}$. The evolution of...
Triatomic and chained molecular phases of metallic hydrogen at ultra-high pressures
Triatomic chained molecular phases metallic hydrogen ultra-high pressures
2010/11/11
It is long believed that steadily compressed hydrogen beyond 400 GPa might undergo a transition from a proton-paired insulator to a monatomic metal, associating with dissociation of the molecules. A ...
Many theoretical and laboratory studies predict H2 to be formed in highly excited ro-vibrational states. The consequent relaxation of excited levels via a cascade of infrared transitions might be obse...
Near-IR Molecular Hydrogen Emission of Protostars: Probing Circumstellar Environments
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
We present new observations of near-infrared molecular hydrogen (H2) line emission in a sample of 18 Class I and flat-spectrum low mass protostars, primarily in the Tau- Aur and {\rho} Oph dark clouds...
Interaction of Atomic and Molecular Hydrogen with Tholin Surfaces at Low Temperatures
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/27
We study the interaction of atomic and molecular hydrogen with a surface of tholin, a man-made polymer considered to be an analogue of aerosol particles present in Titan's atmosphere, using thermal pr...
Hydrogen atom in momentum space with a minimal length
Hydrogen atom momentum space minimal length
2010/10/18
A momentum representation treatment of the hydrogen atom problem with a generalized un-
certainty relation,which leads to a minimal length (Xi)min = ~√3 + ′, is presented. We show that the distanc...
Variational and perturbative approaches to the confined hydrogen atom with a moving nucleus
Variational perturbative approaches confined hydrogen atom moving nucleus
2010/10/19
We calculate the ground–state energy and other physical properties of the hydrogen atom inside a spherical box with an impenetrable wall. We apply the variational method and perturbation theory and co...
When physicists in Germany discovered a simple way of using a scanning tunnelling microscope (STM) to take images of molecules at the atomic scale for the first time, the technique looked set to make ...
Compound-specific stable carbon and hydrogen isotopic compositions of n-alkanes in urban atmospheric aerosols from Tokyo
δD, δ13C, n-alkane urban aerosols Tokyo
2017/8/9
Stable carbon (δ13C) and hydrogen (δD) isotopic compositions of n-alkanes in total suspended particles from Tokyo were measured to decipher their source and transport in the polluted urban atmosphere....
Heterogeneous uptake of gaseous hydrogen peroxide by Gobi and Saharan dust aerosols: a potential missing sink for H2O2 in the troposphere
gaseous hydrogen peroxide Gobi and Saharan dust aerosols H2O2 the troposphere
2010/8/16
The first direct laboratory measurements of gaseous hydrogen peroxide uptake by authentic Gobi and Saharan dust aerosol particles as a function of relative humidity (RH) have been carried out in an en...