scholarly journals Influence of dietary volatile fatty acids on the fatty-acid composition of lamb triglycerides, With special reference to the effect of propionate on the presence of branched-chain components

1972 ◽  
Vol 28 (03) ◽  
pp. 409 ◽  
Author(s):  
G. A. Garton ◽  
F. D. Deb. Hovell ◽  
W. R. H. Duncan
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Special Reference ◽  
Acid Composition ◽  
Volatile Fatty Acids ◽  
Branched Chain

scholarly journals Fatty Acid Composition of Caprine Milk: Major, Branched-Chain, and Trans Fatty Acids

1999 ◽  
Vol 82 (5) ◽  
pp. 878-884 ◽  
Author(s):  
L. Alonso ◽  
J. Fontecha ◽  
L. Lozada ◽  
M.J. Fraga ◽  
M. Juárez
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Trans Fatty Acids ◽  
Caprine Milk ◽  
Branched Chain

scholarly journals Ruminal parameters and fatty acid composition of omasal digesta and milk in cows fed sugarcane-based diets supplemented with sunflower oil

2020 ◽  
pp. 2317-2334
Author(s):  
Fernando César Ferraz Lopes ◽  
Shirley Motta de Souza ◽  
Sebastião de Campos Valadares Filho ◽  
Marco Antônio Sundfeld da Gama ◽  
Luciana Navajas Rennó
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Sunflower Oil ◽  
Milk Fat ◽  
Volatile Fatty Acids ◽  
Linear Increase ◽  
Neutral Detergent Fiber ◽  
Apparent Digestibility

This study evaluates the intake and digestion of nutrients, parameters of rumen fermentation and degradation, omasal digesta and milk fatty acid composition, productive performance, and the concentration of serum metabolites in cows fed 600 g kg-1 sugarcane-based diets containing 0 (control), 15, 30, and 45 g kg-1 sunflower oil (SO) on a dry matter (DM) basis. Four rumen-cannulated Holstein x Gyr cows yielding 15±5 kg day-1 with 110±10 days in milk were allocated in a 4 x 4 Latin square design. Data were analyzed using mixed models, and significant differences were declared at P < 0.05. There was no effect of SO on the intake and apparent digestibility of DM, crude protein, neutral detergent fiber (NDF) and nonfibrous carbohydrates, but there was a linear increase in the intake and digestibility of ether extract. Dietary SO levels did not alter the ruminal degradability parameters for DM and NDF, rumen pH and contents of ammonia N, acetate, propionate and volatile fatty acids. Milk fat content and yield were linearly decreased, whereas a linear increase in milk protein content was observed in response to increasing levels of SO, but with no effect on milk yield. Linear reductions in palmitic and ?-linolenic acid contents, a linear increase in trans-10 C18:1 and elaidic acids, and a quadratic effect on vaccenic and rumenic acids were observed in omasal digesta of cows fed increasing levels of SO. Overall, up to 45 g kg-1 SO can be included on DM of chopped sugarcane-based diets without reducing consumption, apparent digestibility and rumen degradability of DM and fiber. Supplementing chopped sugarcane-based diets with 30 to 45 g kg-1 SO (DM basis) promotes milk fat depression due to the inhibition of mammary lipogenesis by specific rumen-derived fatty acid intermediates of the biohydrogenation of unsaturated C18 fatty acids. The inclusion of 15 to 45 g kg-1 SO in chopped sugarcane-based diets improves the nutritional quality of milk fat, with increases in the levels of oleic, vaccenic and rumenic acids, beneficial to human health, and a reduction in the levels of the hypercholesterolemic lauric, myristic and palmitic acids.

scholarly journals Variation of Branched-Chain Fatty Acids Marks the Normal Physiological Range for Growth in Listeria monocytogenes

2002 ◽  
Vol 68 (6) ◽  
pp. 2809-2813 ◽  
Author(s):  
David S. Nichols ◽  
Kirsty A. Presser ◽  
June Olley ◽  
Tom Ross ◽  
Tom A. McMeekin
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Listeria Monocytogenes ◽  
Acid Composition ◽  
Physiological Range ◽  
Branched Chain Fatty Acids ◽  
Branched Chain ◽  
High Degree ◽  
Chain Fatty Acids

ABSTRACT The fatty acid composition of Listeria monocytogenes Scott A was determined by close-interval sampling over the entire biokinetic temperature range. There was a high degree of variation in the percentage of branched-chain fatty acids at any given temperature. The percentage of branched C17 components increased with growth temperature in a linear manner. However, the percentages of iso-C15:0 (i15:0) and anteiso-C15:0 (a15:0) were well described by third-order and second-order polynomial curves, respectively. There were specific temperature regions where the proportion of branched-chain fatty acids deviated significantly from the trend established over the entire growth range. In the region from 12 to 13°C there were significant deviations in the percentages of both i15:0 and a15:0 together with a suggested deviation in a17:0, resulting in a significant change in the total branched-chain fatty acids. In the 31 to 33°C region the percentage of total branched-chain components exhibited a significant deviation. The observed perturbations in fatty acid composition occurred near the estimated boundaries of the normal physiological range for growth.

Fatty Acid Composition of Lipids from Sulphuroxidizing and Methylotrophic Bacteria from Thyasirid and Lucinid Bivalves

1995 ◽  
Vol 75 (2) ◽  
pp. 445-454 ◽  
Author(s):  
J. Gregor Fullarton ◽  
P. Wood ◽  
John R. Sargent
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acids ◽  
Acid Composition ◽  
Similar Pattern ◽  
Methylotrophic Bacteria ◽  
Free Living ◽  
Branched Chain Fatty Acids ◽  
Branched Chain

Lipids of sulphur-oxidizing bacteria isolated fromThyasim flexuosahad large amounts of 18:l(n-7) together with lesser amounts of both 16:l(n-7) and 16:0 as their major fatty acids. Smaller amounts of the cyclopropyl fatty acids, cyclic δ9,10 C16 and especially cyclic δll,12 C18 were also present. A similar pattern was found for methylotrophic bacteria isolated fromThyasira, MyrteaandLucinoma, except that 16:l(n-7) and 16:0 were both present in larger amounts than 18:l(n-7) and small amounts of cyclic δ9,10 C16 and lesser amounts of cyclic All,12 C18 were present in all cases. The fatty acids 18:l(n-7), 16:l(n-7), 16:0, cyclic δ9,10 C16, and cyclic δll,12 C18 were all present in varying amounts in several free-living, non-marine, sulphur-oxidizing bacteria analysed, and in one bacterium both cyclic δ9,10 C18 and cyclic δll,12 C20 were abundant. Branched-chain fatty acids and polyunsaturated fatty acids were not detected in any of the sulphur-oxidizing or methylotrophic bacteria analysed. The lipids of the sulphur-oxidizing and methylotrophic bacteria consisted largely of phosphatidylethanolamine, phosphatidylglycerol and cardiolipin. The results are discussed in terms of fatty acids as indicators of nutritional relationships in bacterial-invertebrate symbioses.

The Fatty Acid Composition of Vernix caseosa

1963 ◽  
Vol 16 (4) ◽  
pp. 679 ◽  
Author(s):  
DT Downing
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Vernix Caseosa ◽  
Branched Chain ◽  
Hydrolysis Of

The fatty acids obtained on hydrolysis of sebum from newly-born babies contained approximately equal amounts of saturated and unsaturated fatty acids and 10% of α-hydroxyacids. Gas chromatographic examination showed that the saturated fatty acids (C12 to C30) contained 78% branched-chain and 22% normal compounds, while the unsaturated acids (C12 to C32) contained 15% branched and 85% normal compounds. The a-hydroxyacids (C10 to C26) contained 79% branched-chain and 21% normal components and had little if any unsaturation. The high proportion of branched-chain acids suggests that these are not likely to be exogenous.

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