Results 211 to 220 of about 51,055 (265)
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Human Vaginal Secretions: Volatile Fatty Acid Content
Science, 1974Vaginal samples (682) were collected by a tampon method from 50 healthy young women. Samples were analyzed by gas chromatography. The volatile aliphatic acids increased during the late follicular phase of the menstrual cycle and declined progressively during the luteal phase.
R P, Michael, R W, Bonsall, P, Warner
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Pseudo catalytic transformation of volatile fatty acids into fatty acid methyl esters
Bioresource Technology, 2016Instead of anaerobic digestion of biodegradable wastes for producing methane, this work introduced the transformation of acidogenesis products (VFAs) into fatty acid methyl esters (FAMEs) to validate the feasible production of short-chained fatty alcohols via hydrogenation of FAMEs.
Jong-Min, Jung +3 more
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Simplified automated volatile fatty acids analysis
Water Research, 1968Abstract A method is proposed for the automated determination of the total volatile fatty acid content of aqueous samples. The manifold is simpler and the method quicker than existing procedures. No special preparation of the reagents is required. Improved accuracy results by taking into consideration the colour contributed by the sample itself.
J.E. Harwood, D.J. Huyser
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Volatile Cuprous and Silver Salts of Fatty Acids
Nature, 1948IN a communication in Nature1, one of us (F. K.) reported on a volatile copper compound obtained by thermal decomposition of cupriformate. J. G. Maltby2 directed attention to the work of A. Angel and A. V. Harcourt3, according to whom cuprous acetate forms as a white sublimate when cupriacetate is heated.
A, KELLER, F, KOROSY
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Volatile fatty acids, “copulins”, in human vaginal secretions
Psychoneuroendocrinology, 1975Abstract (1) In a double-blind study using a new tampon method, 682 samples of vaginal secretions were collected from 50 healthy young women attending a university. (2) Samples were analyzed by gas chromatography for the volatile fatty acids (C2-C6) that have sex-attractant properties in infra-human primates.
R P, Michael, R W, Bonsall, M, Kutner
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Volatile Fatty Acids in Portal Blood of Sheep
Nature, 1949VOLATILE fatty acids—chiefly acetic, propionic and butyric acids—are formed as a result of the fermentation processes in the rumen of sheep and are absorbed through its wall. With the purpose of investigating the concentration of these acids and other constituents in the portal blood during a digestion cycle, that is, the 12-hour period after feeding ...
P, SCHAMBYE, A T, PHILLIPSON
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Volatile fatty acids in normal human physiological fluids
Clinica Chimica Acta, 1970Abstract A relatively simple gas Chromatographic technique is described which makes possible the identification and quantitation of free volatile fatty acids containing up to 6 carbon atoms in physiological fluids. Values are shown for the concentrations of these acids in the urine, serum, cerebrospinal fluid, and sweat of normal human subjects.
T L, Perry +5 more
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Pretreatment of macroalgae for volatile fatty acid production
Bioresource Technology, 2013In this study, a novel method was proposed for the biological pretreatment of macroalgae (Laminaria japonica, Pachymeniopsis elliptica, and Enteromorpha crinita) for production of volatile fatty acid (VFA) by anaerobic fermentation. The amount of VFA produced from 40 g/L of L.
Thi Nhan, Pham +2 more
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VOLATILE FATTY ACIDS AND FATTY ACID COMPOSITION OF SILAGE SPECIES
2015In this study, total fatty acid composition and volatile fatty acid of silage species in Turkey was determined by using Gas Chromatography (Shimadzu 15-A). Total lipids were extracted from the corn silage, alfalfa silage and figure silage samples by the method of Folch et al. Silage species were a total of 15 different fatty acids.
Çitil, O. Barış +4 more
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Volatile fatty acids in stored animal slurry
Journal of the Science of Food and Agriculture, 1978AbstractVolatile fatty acids (VFAs) were measured in slurry stored in farm and laboratory conditions. All slurries from farm sources contained VFAs; acetic acid was predominant, followed by propionic, n‐butyric, iso‐butyric, iso‐valeric and n‐valeric. On average, pig slurry contained more total VFAs than did cow slurry.
Paul Cooper, Ian S. Cornforth
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