نتایج جستجو برای: ماده 88
تعداد نتایج: 92557 فیلتر نتایج به سال:
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The investigation of vertical transport in semiconductor heterojunction systems has recently undergone a renaissance due to improved epitaxial techniques in a number of material systems. By usin resonant tunneling, we can perform electronic spectroscopy not only o f the double barrier structure itself, but of any system (with quantized well states) suitably coupled to a resonant tunneling spect...
Measurements have been made of the sputtering yields, the mass spectra of ejected molecules, and ejection rates for various kiloelectronvolt ions incident on sodium sulfide (Na2S). The sputtering yields were small compared to those measured earlier for the more volatile sulfur ($8) and SO2 due to the strong ionic bonding in the solid. The mechanism of sputtering for the corotating sulfur and ox...
چکیده: شته سبزگندم، schizaphis graminum (r.)، به عنوان یکی از آفات مهم غلات دانه ریز و به ویژه گندم در سال های اخیر، جمعیت رو به گسترش داشته و یکی از عوامل مهم انتقال ویروس کوتولگی زرد جو می باشد. در این تحقیق امکان وجود مقاومت در لاین های مختلف گندم در مرحله 2 تا 3 برگی گندم در اتاقک رشد، دمای 1±25 درجه سلسیوس، رطوبت نسبی 5±60 درصد و دوره نوری 14 ساعت روشنایی و 10 ساعت تاریکی از طریق بررسی آ...
A yeast-derived phosphomannan mixture was chemically sulfonated and the composition and structure of the product mixture was studied. This phosphosulfomannan mixture, PI-88, is currently under clinical evaluation as an anti-cancer agent. Analysis using capillary electrophoresis demonstrated that PI-88 was a multi-component mixture. Gel permeation chromatography provided four fractions of PI-88 ...
1Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA 2Laboratório de Ictiologia Sistemática e Evolutiva, Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho 3000, 56078-970 Natal, RN, Brazil 3Department of Biological Sciences, University of Alabama, Tuscaloosa, AL 35487, USA 4Department of BioSci...
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