نتایج جستجو برای: atomic mass

تعداد نتایج: 562573  

2016
Mahendra Kumar Trivedi T. R. Rama Mohan

There has been significant data published in peer-reviewed scientific journals about Mr. Mahendra Kumar Trivedi exercising the biofield energy to change the behaviour and characteristics of living organisms including soil, seeds, plants, trees, animals, microbes, and humans, along with non-living materials including metals, ceramics, polymers, chemicals, pharmaceutical compounds and nutraceutic...

2013
Rameshwori Loukrakpam Shiyao Shan Valeri Petkov Lefu Yang Jin Luo Chuan-Jian Zhong

For oxygen reduction reaction (ORR) over alloy electrocatalysts, the understanding of how the atomic arrangement of the metal species in the nanocatalysts is responsible for the catalytic enhancement is challenging for achieving better design and tailoring of nanoalloy catalysts. This paper reports results of an investigation of the atomic structures and the electrocatalytic activities of terna...

2016
Ali Mansourian Seyed Amir Paknejad Qiannan Wen Gema Vizcay-Barrena Roland A. Fleck Anatoly V. Zayats Samjid H. Mannan

The interplay between porosity and electromigration can be used to manipulate atoms resulting in mass fabrication of nanoscale structures. Electromigration usually results in the accumulation of atoms accompanied by protrusions at the anode and atomic depletion causing voids at the cathode. Here we show that in porous media the pattern of atomic deposition and depletion is altered such that ato...

2016
Yuan-Ping Pang

Predicting crystallographic B-factors of a protein from a conventional molecular dynamics simulation is challenging, in part because the B-factors calculated through sampling the atomic positional fluctuations in a picosecond molecular dynamics simulation are unreliable, and the sampling of a longer simulation yields overly large root mean square deviations between calculated and experimental B...

2004
W.

The Mg isotopic compositions of olivine, spinel, and hihonite from the Murchison carbonaceous chondrite have been determined by secondary ion mass spectrometry. The olivines exhibit only marginal effects. They have no detectable intrinsic mass fractionation; however, after correcting for mass fractionation, the mean residual 26Mg/24Mg for the five grams is slightly in excess of the terrestrial ...

2007
M. Vick G. Michaud

Self-consistent stellar models including all effects of atomic diffusion and radiative accelerations as well as mass loss are evolved from the pre main sequence for stars of 1.35-1.5 M⊙ at solar metallicity (Z=0.02). A mass loss rate similar to the solar mass loss rate is sufficient to reproduce observations of the star τUMa. We discuss the effect of mass loss on the iron convection zone that n...

Journal: :Mass spectrometry reviews 2008
Barbara J Garrison Zbigniew Postawa

Surface based mass spectrometric approaches fill an important niche in the mass analysis portfolio of tools. The particular niche depends on both the underlying physics and chemistry of molecule ejection as well as experimental characteristics. In this article, we use molecular dynamics computer simulations to elucidate the fundamental processes giving rise to ejection of organic molecules in a...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2001
mohammad ali taher

lead is quantitatively retained on 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-br-padap)-ammonium tetraphenylborate with microcrystalline naphthalene or by a column method in the ph range 4.0-6.0 from a large volume of aqueous solutions of various samples with preconcentration factor of 60. after filtration, the solid mass consisting of the lead complex and naphthalene was dissolved with 5...

2009
Gershon Wolansky

It is shown that optimal network plans can be obtained as a limit of point allocations. These problems are obtained by minimizing the mass transportation on the set of atomic measures of prescribed number of atoms.

2006
Philippe de Rouffignac Roy G. Gordon

Praseodymium aluminum oxide (PAO) thin films were grown by atomic layer deposition (ALD) from a new precursor, tris(N,N′-diisopropylacetamidinato) praseodymium, (Pr(amd)3), trimethylaluminum (TMA), and water. Smooth, amorphous films having varying compositions of the general formula PrxAl2–xO3 were deposited on HF-last silicon and analyzed for physical and electrical characteristics. The films ...

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