نتایج جستجو برای: volatile fatty acid
تعداد نتایج: 832324 فیلتر نتایج به سال:
Antidesma bunius is an edible berry fruit with many benefits, such as natural antimicrobials, anticancer, dyes, etc. However, data on chemical content in the still limited. The purpose of this research to identify volatile compounds fruit. We extracted and analyzed A. fruit’s using GC-MS HPLC–DAD-ESI-MS methods. Forty-nine representing 99.91% total chromatogram’s relative peak area were detecte...
هدف از این پژوهش بررسی میزان متیلاسیون شماری از ژنهای مهم مرغ بود. بدین منظور 32 ژن از genbank انتخاب شد. پروموتورهای این ژنها با نرم افزار promoter prediction پیدا شدند. جزایر احتمالی موجود در هر توالی با نرم افزار cpg island searcher مشخص شدند. احتمال متیله شدن هر رشته dna یک ژن، با نرم افزار methylator و آنالیز متیلاسیون با نرم افزار epigraph انجام شد. در نهایت با استفاده از مدل مارکف پنهان،...
The Iran’s coastal marine algae have great potential in the fields of medicine, food and cosmetics which unfortunately, fewer have been studied. In the present study, Total lipid and fatty acid profile of brown algae, N. zanardini were measured in both cold and warm season. The total lipid content with 41.1±0.8 mg/g dry weight was high in February. In the present study, Fatty acid composition o...
The volatile fatty acid profiles were determined by a simple gas chromatographic method in 375 microbiologically positive and negative blood cultures. Aerobic bacteria yielded profiles with low content of acids, some of which were chromatographically negative. Anaerobic bacteria produced more acids and more distinctive profiles. The method makes it possible to confirm the microbiological findin...
Differing efficiencies of utilization of acetic, propionic and butyric acids in both fasting and fattening sheep have been demonstrated by Blaxter and his colleagues (Armstrong & Blaxter, 1957a, b ; Armstrong, Blaxter & Graham, 1957). In fasting sheep, when the acids were given singly as the sole source of energy, the heat increment with acetic acid (41 yo of the energy of the metabolized acid)...
In this study fatty acid contents, because of the importance in human’s life, and their seasonal variations of a dominant bivalve of Haleh Creek were determined for the first time. Fatty acid identification was done by GC-MS (Gas Chromatography–Mass Spectrometry) method. After collecting and dissecting the species from the shells, samples weighed and frozen for further experiments. All the samp...
The chemical composition of the brown alga Cystoseira crinita Bory from the Eastern Mediterranean was investigated. Fourteen sterols have been identified, five of them for the first time in algae. The structure of one new sterol was established. The origin of seven sterols with short side chains was discussed. In the volatile fraction 19 compounds and in the polar fraction 15 compounds were ide...
The biological synthesis of long chain fatty acids from acetate by slices of rat liver tissue was demonstrated by Bloch, Borek, and Rittenberg (1) in 1946, and has been repeated by several investigators (2, 3). The effect of insulin on this incorporation was studied by Bloch and Kramer (2), who reported that, whereas insulin inhibited the incorporation of labeled acetate into fatty acids, the c...
We report the use of SP-1200 (Supelco Inc.) for quantitative gas-chromatographic determination of shortchain fatty acids (C2-C5) in stool water. The ratio of peak areas for these acids to that for 2-methylvaleric acid (internal standard) is linear for each acid from 60 to 1800 mg/liter. Lactic acid, occasionally present in stool in abnormally high amounts, is not detectable as the free acid on ...
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