نتایج جستجو برای: molecular oxygen impurity

تعداد نتایج: 836296  

2015
Wei-Qi Huang Shi-Rong Liu Zhong-Mei Huang Ti-Ger Dong Gang Wang Cao-Jian Qin

It is very interesting that magic electron affection promotes growth of nanocrystals due to nanoscale characteristics of electronic de Broglie wave which produces resonance to transfer energy to atoms. In our experiment, it was observed that silicon nanocrystals rapidly grow with irradiation of electron beam on amorphous silicon film prepared by pulsed laser deposition (PLD), and silicon nanocr...

2006
Y. Kopelevich

In this article we shortly review previous and recently published experimental results that provide evidence for intrinsic, magnetic-impurity-free ferromagnetism and for high-temperature superconductivity in carbon-based materials. The available data suggest that the origin of those phenomena is related to structural disorder and the presence of light elements like hydrogen, oxygen and/or sulfu...

Journal: :Journal of medicinal chemistry 2008
Zhenqing Zhang Michel Weïwer Boyangzi Li Melissa M Kemp Tyler H Daman Robert J Linhardt

Heparin, a widely used anticoagulant, is being rapidly displaced by low-molecular-weight heparins. Recently, certain lots of heparin have been associated with anaphylactoid-type reactions resulting from contamination with oversulfated chondroitin sulfate. This impurity has also contaminated low-molecular-weight heparins obtained by chemical and enzymatic depolymerization of heparin. The sensiti...

2005
S. Y. Savrasov V. Oudovenko K. Haule D. Villani G. Kotliar

S. Y. Savrasov,1 V. Oudovenko,2,5 K. Haule,3,5 D. Villani,4,5 and G. Kotliar5 1Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA 2Laboratory for Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia 3Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia 4JP Morgan Chase Bank, 270 Park Avenue, New York, New York 10017, USA 5Departmen...

2005
H. Johannesson

The two-channel Anderson impurity model serves as a prototype for describing heavy-fermion materials with a possible mixed-valent regime with both quadrupolar and magnetic character. We report on the low-energy physics of the model, using a conformal field theory approach with exact Bethe Ansatz results as input.

Journal: :Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 1985

1999
Kai Chen Y. Lawrence Yao Vijay Modi

A numerical model is developed for the process of oxygenassisted laser cutting of mild steel. Coupled oxygen concentration and energy balance equations are solved by a controlvolume-based computational scheme, while the velocity field is obtained by analytical boundary theory. The enthalpy method is adopted to trace the free boundary of the phase change and thus determine the molten-layer thick...

2007
Soack Dae Yoon Vincent G Harris Carmine Vittoria Allan Widom

TiO2−δ films were deposited on (100) lanthanum aluminate, LaAlO3, substrates at a low oxygen chamber pressure, P ≈ 0.3 mTorr, employing a pulsed laser ablation deposition technique. In previous work, it was established that the oxygen deficiency in these films induced ferromagnetism. In this work it is demonstrated that this same oxygen deficiency also gives rise to semiconductor titanium ion i...

2014
Kai Chen Y. Lawrence Yao

A numerical model is developed to study the oxidation effects in oxygen-assisted laser cutting of mild steel. Coupled oxygen concentration and energy balance equations are solved by a control-volume based computational scheme while the velocity field is obtained by analytical boundary theory. Theoretical explanation on striation formation is given based on an instability analysis of the molten ...

2013

Determination of the radionuclide iodine 129 using ICP-MS has been improved by the use of an Octopole Reaction System (ORS) ICP-MS, operated in oxygen cell mode. Oxygen reaction gas removes the background signal at m/z 129, which is due to the presence of Xe as an impurity in the Ar plasma gas and to the polyatomic ion IH2. NIST SRM standards with different 129I/127I ratios and at multiple conc...

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