Positional specificity oftrans fatty acids in fetal lecithin

Lipids ◽  
1981 ◽  
Vol 16 (7) ◽  
pp. 479-484 ◽  
Author(s):  
Carolyn E. Moore ◽  
Govind A. Dhopeshwarkar
Keyword(s):  
Fatty Acids ◽  
Positional Specificity

Trans Fatty Acids: Transport and Positional Specificity in Rat Placental Lecithin

Neonatology ◽  
1982 ◽  
Vol 42 (3-4) ◽  
pp. 138-144 ◽  
Author(s):  
C.E. Moore ◽  
G.A. Dhopeshwarkar
Keyword(s):  
Fatty Acids ◽  
Positional Specificity

Milk triglycerides: the degree of non-random associations of fatty acids

1973 ◽  
Vol 40 (2) ◽  
pp. 273-287 ◽  
Author(s):  
R. A. Breach ◽  
R. Dils ◽  
R. Watts
Keyword(s):  
Fatty Acids ◽  
Molecular Weight ◽  
Published Data ◽  
Glycerol Backbone ◽  
Positional Specificity ◽  
Molecular Weight Distributions ◽  
Weight Distributions ◽  
Selective Acylation ◽  
Chain Lengths ◽  
Fatty Acid Compositions

SummaryPublished data are available for the fatty-acid compositions and molecular-weight distributions of triglycerides in milk and adipose tissue from the guinea-pig, rat, mouse and rabbit, and in milk from the human, cow, mink and hamster. These data have been used to calculate the extent of non-random associations of fatty acids of different chain lengths in these triglycerides.The results support, in general, the concept of non-correlative acylation, i.e. that during the biosynthesis of these triglycerides, fatty acids already present on the glycerol backbone do not influence the selective acylation of subsequent fatty acids. However, milk triglycerides from these animals show varying degrees of intermolecular specificity which can be explained in terms of positional specificity of fatty acids on the glycerol backbone.

scholarly journals Enzymatic Reetherification in the Production of Butterfat Substitutes

2019 ◽  
Vol 49 (2) ◽  
pp. 270-280 ◽  
Author(s):  
Любовь Терещук ◽  
Lyubovʼ Tereshchuk ◽  
Ксения Старовойтова ◽  
Ksenia Starovoytova
Keyword(s):  
Fatty Acids ◽  
Chemical Modification ◽  
Dairy Products ◽  
Large Scale ◽  
Thermomyces Lanuginosus ◽  
Lipozyme Tl Im ◽  
High Quality ◽  
Positional Specificity ◽  
Practical Research ◽  
Body Heat

Enzymatic reetherification of fats has numerous technological and economic advantages, which makes its large-scale implementation highly efficient. Unlike chemical modification, enzymatic reetherification demonstrates a greater specificity, typical of the catalytic action of lipase, and a higher controllability. Lipases with positional specificity cause redistribution of fatty acids to occur only in extreme provisions of triglycerides. In addition, this method is 1.5 times lower than hydrogenation of fats. The authors used the facilities of an innovative laboratory provided by JSC Eurasian Foods Corporation to conduct practical research on reetherification of fatty mixes. The main objective was to study the effect of the fats obtained by fermental reetherification on the quality indicators of butterfat substitutes. The research featured the input products to be used in the formula of reetherified fat and prepared fat mixes for butterfat substitutes. The paper describes the process of enzymatic reetherification of mixes of oils and fats, prepared reesterified fats, and buttermilk substitutes obtained from reetherified fats. The process involved a sequence of reactors filled with Lipozyme TL IM, a granulated substance of a microbic 1.3-specific lipase. The lipase was obtained from Thermomyces Lanuginosus, which had been immobilized with silica gel. The obtained products conformed to the butterfat standards in that they contained 16–2% of polynonsaturated fatty acids, no transisomers of fatty acids, ≤ 38% of palmitiny acid, and ≤ 5% of solid triglycerides at 35 of °C. The melting temperature was under body heat. The resulting characteristics of butterfat substitutes make them high-quality dairy products.

Positional specificity of saturated and unsaturated fatty acids in phosphatidic acid from rat liver

1969 ◽  
Vol 176 (1) ◽  
pp. 95-110 ◽  
Author(s):  
F. Possmayer ◽  
G.L. Scherphof ◽  
T.M.A.R. Dubbelman ◽  
L.M.G. Van Golde ◽  
L.L.M. Van Deenen
Keyword(s):  
Fatty Acids ◽  
Phosphatidic Acid ◽  
Rat Liver ◽  
Unsaturated Fatty Acids ◽  
Positional Specificity
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