نتایج جستجو برای: bligh and dyer
تعداد نتایج: 16827297 فیلتر نتایج به سال:
Extraction is an important procedure for samples that contain soil because other compounds in soil may affect analysis of estrogens. This study was conducted to evaluate three different extraction methods for 17beta-estradiol in soil. Sand, bentonite, and organic-rich silt loam were spiked with 1 mg kg(-1) of 17beta-estradiol as a model compound of estrogens. 17beta-estradiol and its metabolite...
The surfactant fraction (55,000-g pellet) of leukocyte-free rat bronchoalveolar lavage fluid contains factors that rapidly kill and lyse pneumococci. These factors were purified and identified biochemically by using a quantitative bactericidal test to monitor fractionation procedures. 91% of the antipneumococcal activity of rat surfactant was recovered in chloroform after extraction of rat surf...
Francisella tularensis, the Gram-negative bacterium that causes tularemia, produces a high molecular weight capsule that is immunologically distinct from Francisella lipopolysaccharide but contains the same O-antigen tetrasaccharide. To pursue the possibility that the capsule of Francisella live vaccine strain (LVS) has a structurally unique lipid anchor, we have metabolically labeled Francisel...
Bligh and Dyer (B & D) or Folch procedures for the extraction and separation of lipids from microorganisms and biological tissues using chloroform/methanol/water have been used tens of thousands of times and are "gold standards" for the analysis of extracted lipids. Based on the Conductor-like Screening MOdel for realistic Solvatation (COSMO-RS), we select ethanol and ethyl acetate as being...
Microalgae produce a wide range of lipid compounds of potential commercial interest. Total lipid extraction performed by conventional extraction methods, relying on the chloroform-methanol solvent system are too laborious and time consuming for screening large numbers of samples. In this study, three previous extraction methods devised by Folch et al. (1957), Bligh and Dyer (1959) and Selstam a...
An ultraperformance LC (UPLC) method for the separation of different lipid molecular species and lipid isomers using a stationary phase incorporating charged surface hybrid (CSH) technology is described. The resulting enhanced separation possibilities of the method are demonstrated using standards and human plasma extracts. Lipids were extracted from human plasma samples with the Bligh and Dyer...
این تحقیق جهت تعیین میزان اسیدهای چرب اشباع و غیر اشباع در بافت 6 گونه میگوی دریایی و پرورشی شامل گونه های میگوی موزی(fenneropenaeus merguiensis)، ببری سبز(penaeus semisulcatus)، سفید هندی(fenneropenaeus indicus)، سرتیز(metapenaeus affinis)، خنجری(parapenaeopsis stylifera)و سفید غربی (litopenaeus vannamei)،انجام شد. استخراج روغن از بافت گوشت میگوها به روش bligh and dyer, 1959 و با استفاده از ...
مطالعه حاضر جهت بررسی ترکیب اسیدهای چرب در دو گونه ماهی هامور معمولی(epinephelus coioides) و صبیتی(sparidentex hasta) (پرورشی و دریایی)انجام گرفت. نمونه ها از استخرهای پرورشی و نمونه های دریایی از سواحل خلیج فارس جمع آوری گردیدند. استخراج چربی ها از بافت ماهیچه بر اساس روش bligh and dyer, 1959 انجام گرفت، پس از استخراج چربی ترکیب اسیدهای چرب با استفاده از دستگاه گاز کروماتوگرافی(gc) انجام شد. ...
Some algae are rich sources of various beneficial lipids and fatty acids. In recent years, several studies have been performed on algae to evaluate the effect of different salinity treatments on the quantity and quality of these lipids. The present study was performed to investigate the effect of different concentrations of sodium chloride on total lipid content, fatty acid profile, and omega-3...
In [8], Swinnerton-Dyer considered the proportion of twists of an elliptic curve with full 2-torsion that have 2-Selmer group of a particular dimension. Swinnerton-Dyer obtained asymptotic results on the number of such twists using an unusual notion of asymptotic density. We build on this work to obtain similar results on the density of twists with particular rank of 2-Selmer group using the na...
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