نتایج جستجو برای: gas chromatographymass
تعداد نتایج: 245196 فیلتر نتایج به سال:
Sialic acids have been found to mask antigens, receptors and other recognition sites on molecules and cells. This has been investigated best with hepatocyte and macrophage lectins which recognize 13-galactose and N-acetyl-13-galactosamine residues on molecules and cells exposed by sialidase treatment. The lectin on macrophages leads to the binding and phagocytosis of erythrocytes after the enzy...
Laurus nobilis L. (sweet laurel) is one of the volatile oil bearing plants of Lauraceae family. It is cultivated in different parts of Iran and its leaves and fruits have been used in food, cosmetics and pharmaceutical industries. There are a few reports about the effects of some environmental conditions on the quality and quantity of laurel volatiles. The goal of our work was to search the sea...
Utilization of 3-N-trimethylamino-1-propanol by Rhodococcus sp. strain A4 isolated from Natural Soil
The aim of this study was to screen for microorganism that able to utilize 3-N-trimethylamino-1-propanol (homocholine) as a sole source of carbon and nitrogen. The aerobic degradation of homocholine has been found by a gram-positive Rhodococcus sp. bacterium isolated from soil. The isolate was identified as Rhodococcus sp. strain A4 based on the phenotypic features, physiologic and biochemical ...
The amino acid L-arginine is a component of proteins and is involved in several metabolic pathways, including the urea cycle, the synthesis of creatine and the generation of nitric oxide [1]. In the last 2 years it has been established that arginine can also be decarboxylated, resulting in the formation of agmatine, 4(aminobutyl)guanidine. The enzyme arginine decarboxylase was thought to be pre...
The present study was aimed at analysis of bioactive constituents of leaves from Abutilon indicum. The ethyl acetate extract of the leaves were subjected to Fourier transform infrared spectroscopy (FT-IR) and Gas chromatographymass spectroscopic (GCMS) analysis. GC-MS analysis of plant extract was performed using a Perkin-Elmer GC Clarus 500 system and Interpretation on mass spectrum GC-MS was ...
in this work, zncao2 (zinc oxide-calcium oxide) nanocomposite were synthesized at different temperatures (500-700°c) by sol-gel method based on polymeric network of polyvinyl alcohol (pva). the synthesized samples were characterized by sem/edax, ft-ir and xrd techniques. it was found that synthesized nanocomposites have 1.62, 2.05 and 13.91%wt of cao, respectively. the obtained results show tha...
Methods Stem Br (Vital Nutrients lot # 2890; Middletown, CT), was tested for authenticity and purity. Female C57BL/6J mice, (Jackson Laboratory; Bar Harbor, ME) received one bolus, i.p. injection of Br (12mg/kg) in 0.5ml of physiological saline and plasma collected at baseline 3, 6, 12 and 24 hours. All procedures were approved by the Animal Care Committee at University of CT Health Center. Pos...
اکثر خطوط لوله انتقال gas-condensate در مناطق نفت خیز ایران، دارای قطر زیاد و تحت فشار بالا، درخارج از محدوده شرایط به کار رفته درایجاد مدل های دوفازی موجود می باشند. مدلهای فعلی، عموما براساس اطلاعات تجربی بدست آمده از لوله های کم قطر، در فشارهای پایین و تحت شرایط آزمایشی با مقدار مایع بیش از 10 ارائه گردیده اند. و به دلیل آنکه میزان مایع جمع شده در خطوط انتقال گاز و یا gas-condensate کمتر ازا...
Purpose: To explore the hypotensive activity and chemical composition of Moringa oleifera Lam (Moringaceae) roots. Methods: The fresh roots of M. oleifera was cut into small pieces and successively extracted with petroleum ether (PE) and dichloromethane (DC). PE extract was further divided into MRP and MRP -1. DC extract showed a thick mass during evaporation which was separated as MRDC IN. The...
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