نتایج جستجو برای: methanol
تعداد نتایج: 30713 فیلتر نتایج به سال:
در پروژه حاضر داده های تعادلی فشار بخار برحسب کسر مولی مایع برای سیستم های methanol()methyl tert - buthyl ether/ در درجه حرارت های 25،35،45درجه سانتیگراد و سیستم) diisopropyl ether/methanol(در دمای 30 درجه سانتیگراد اندازه گیری شده است . برای اندازه گیری از دستگاهی شبیه به دستگاه gibbs vanness که به روش استاتیکی کار می کند استفاده شده است . تمام سیستمهای اندازه گیری شده انحراف مثبت از قانون رائ...
the history of plant’s used for mankind is as old as the start of humankind. initially, people used plants for their nutritional proposes but after the discovery of medicinal properties, this natural ?ora became a useful source of disease cure and health improvement across various human communities. berberis vulgaris is one of the medicinal plants used in iranian traditional medicine. berberis ...
It is not sufficiently appreciated that methly alcohol is very toxic. For econoi' reasons, methyl (wood) alcohol is employed as a substitute for tbyl (grain) alcohol, in what may be termed comparatively innocent products, such as perfumes, hair tonics, skin lotions, , '/ polishes, varnishes, etc. Government analysts, not infrequently, find it employed in the manufacture of various extracts for ...
در این کار تحقیقاتی ابتدا مطالعه سینتیک واکنش پیریدین و 2 کلر پیریدین با کمپلکس پلاتین (ii) به فرمول p-tol)2 (sme2)2])pt]در دماهای 30،20،15،5 و 40 درجه سلسیوس بررسی گردید. که بدلیل سرعت زیاد واکنش محاسبه پارامترهای سینتیکی غیر میسر بود لذا کار ترمودینامیکی جانشینی سه لیگاند از پیریدین و مشتقات آن (2 کلروپیریدین و 2 برموپیریدین) در سه حلال (دی کلرو متان، استن و متانول) در دستور کار قرار گرفت. ب...
Ab initio calculations at the B3LYP/aug-cc-pVDZ, B3PW91/aug-ccpVDZ, MP2/aug-cc-pVDZ, B3LYP/6-311 G(2d,2p), B3PW91/6-311 G(2d,2p), and MP2/6-311 G(2d,2p) levels are performed for the IR spectra of isolated water and methanol molecules and hydrogen-bonded water–methanol, methanol–water, and methanol–methanol complexes. Frequency shifts and changes in intensities are obtained for the proton donor ...
The largest of the gene clusters coding for proteins involved in methanol oxidation is the cluster mxaFJGIR(S)ACKLDEHB. Disruption of most of these genes leads to lack of growth on methanol. The previous results showed that the mutant lacking MxaD grows on methanol although at a low rate. This is explained by the low rate of methanol oxidation by whole cells. The specific activity of methanol d...
background: herbal distillates had been used for many centuries as herbal medicine in traditional persian medicine. recently, some studies claimed the presence of methanol in different types of herbal distillates which can cause different complications or even death as methanol is highly toxic. the main purpose of this study was to determine methanol content in the commonly-used industrial herb...
The effect of pretreatment conditions on the oxidation state and activity of micelle-synthesized Pt nanoparticles supported on ZrO2 was studied for methanol decomposition and oxidation reactions. An O2-pretreatment is observed to be effective for producing clean, stable, and active nanoparticles. Pt-oxide species formed during such pretreatments were found to have little influence in methanol d...
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