scholarly journals The influence of maize oil on the fatty acid composition of tissues of calves with and without vitamin E

1972 ◽  
Vol 27 (2) ◽  
pp. 327-335 ◽  
Author(s):  
Ritva Poukka ◽  
Aili Oksanen
Keyword(s):  
Arachidonic Acid ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Vitamin E ◽  
Acid Composition ◽  
Inhibitory Effect ◽  
Chain Elongation ◽  
Lipid Fractions ◽  
Liver And Kidney ◽  
Maize Oil

1. Fatty acid levels were studied in the tissues of 1-week-old calves receiving maize oil (in filled milk) with and without supplementary α-tocopherol. The calves that were not given vitamin E developed muscular dystrophy.2. Decreased amounts of linoleic acid and increased amounts of arachidonic acid were found in nearly all the lipid fractions of skeletal muscles, hearts, livers and kidneys of vitamin E-deficient calves. The concentration of the polyunsaturated fatty acids beyond arachidonic acid remained about the same in both groups. There was a significant decrease of 20:2Ω6 fatty acid in the phosphatidy1 choline, phosphatidy1 ethanolamine and free fatty acid fractions in the livers and kidneys of vitamin E-deficient calves.3. It is suggested that vitamin E has an inhibitory effect on the desaturating but not on the chain-elongation enzymes of microsomes in the liver and kidney.4. Maize-oil feeding had only a slight effect on erythrocyte fatty acid composition, and the erythrocyte haemolysis test was negative even in the vitamin E-deficient animals.

scholarly journals The influence of dietary fatty acid composition on N-ethyl-N- nitrosourea-induced mammary tumour incidence in the rat and on the composition of inositol- and ethanolamine-phospholipids of normal and tumour mammary tissue

1994 ◽  
Vol 71 (4) ◽  
pp. 543-552 ◽  
Author(s):  
Christinem Williams ◽  
Karen Maunder
Keyword(s):  
Fatty Acids ◽  
Arachidonic Acid ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Fish Oil ◽  
Olive Oil ◽  
Acid Composition ◽  
Dietary Fatty Acid ◽  
Tumour Tissue ◽  
Maize Oil

This study has investigated the influence of dietary fatty acid composition on mammary tumour incidence in N-ethyl-N-nitrosourea (ENU)-treated rats and has compared the susceptibility to dietary fatty acid modification of the membrane phospholipids phosphatidylinositol (PI) and phosphatidylethanolamine (PE) from normal and tumour tissue of rat mammary gland. The incidence of mammary tumours was significantly lower in fish oil- (29%), compared with olive oil- (75%; P < 0.04) but not maize oil-(63%; P < 0.1) fed animals. No differences in PI fatty acid composition were found in normal or tumour tissue between rats fed on maize oil, olive oil or fish oil in diets from weaning. When normal and tumour tissue PI fatty acids were compared, significantly higher amounts of stearic acid (18:0) were found in tumour than normal tissue in rats given olive oil (P < 0.05). A similar trend was found in animals fed on maize oil, although differences between normal and tumour tissue did not reach a level of statistical significance (P < 0.1). In mammary PE, maize oil-fed control animals had significantly higher levels of linoleic acid (18:2n−6) than either olive oil- or fish oil-fed animals (P < 0.05, both cases) and levels of arachidonic acid were also higher in maize oil- compared with fish oil-fed animals (P < 0.05). In tumour-bearing animals no differences in PE fatty acid composition were found between the three dietary groups. When normal and tumour tissue PE fatty acids were compared, significantly lower amounts of linoleic acid (18:2n-6; P < 0.01) and significantly greater amounts of arachidonic acid (20:4n−6; P < 0.05) were found in tumour than normal tissue of rats fed on maize oil. The present study shows that the fatty acid composition of PI from both normal and tumour tissue of the mammary gland is resistant to dietary fatty acid modification. The PE fraction is more susceptible to dietary modification and in this fraction there is evidence of increased conversion of linoleic acid to arachidonic acid in tumour compared with normal tissue. Lower tumour incidence rates in rats given fish oils may in part be due to alteration in prostanoid metabolism secondary to displacement of arachidonic acid by eicosapentaenoic acid, but PE rather than PI would appear to be the most likely locus for diet-induced alteration in prostanoid synthesis in this tissue. Effects of dietary fatty acids other than on the balance of n−6 and n−3 fatty acids, and on prostanoid metabolism, should also be considered. The significance of increased stearic acid content of PI in tumours of olive oil-fed animals and the possible influence of dietary fatty acids on the capacity for stearic acid accumulation requires further study.

The composition and metabolism of fatty acids in Ips paraconfusus Lanier (Coleoptera: Scolytidae)

1972 ◽  
Vol 50 (10) ◽  
pp. 1263-1267 ◽  
Author(s):  
K. R. Penner ◽  
J. S. Barlow
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Sexual Dimorphism ◽  
Acid Composition ◽  
De Novo ◽  
Monounsaturated Fatty Acids ◽  
Ips Paraconfusus ◽  
Chain Elongation ◽  
De Novo Synthesis

The fatty acid composition of newly emerged Ips paraconfusus Lanier shows no sexual dimorphism and is approximately as follows: C14:0, 0.5%; C16:0, 23.0%; C16:1, 6%; C18:0, 3%; C18:1, 55%; C18:2, 9%; C18:3, 2%. Both sexes, but particularly the female, use up fatty acids, particularly the monounsaturated acids, during reproduction. Isotope from 1-14C-acetate injected into newly emerged females appeared in all saturated and monounsaturated fatty acids within 30 min. There was evidence of de novo synthesis of C14:0 and C16:0, chain elongation of C16:0 to C18:0, and desaturation of C16:0 and C18:0 to yield C16:1 and C18:1 respectively.

Phospholipid fatty acid composition, vitamin e content and susceptibility to lipid peroxidation of duck spermatozoa

2000 ◽  
Vol 53 (5) ◽  
pp. 1025-1039 ◽  
Author(s):  
P.F. Surai ◽  
J-P. Brillard ◽  
B.K. Speake ◽  
E. Blesbois ◽  
F. Seigneurin ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Vitamin E ◽  
Acid Composition ◽  
Phospholipid Fatty Acid ◽  
Phospholipid Fatty Acid Composition

Effect of dietary n-9 eicosatrienoic acid on the fatty acid composition of plasma lipid fractions and tissue phospholipids

Lipids ◽  
1996 ◽  
Vol 31 (8) ◽  
pp. 829-837 ◽  
Author(s):  
L. G. Cleland ◽  
M. A. Neumann ◽  
R. A. Gibson ◽  
T. Hamazaki ◽  
K. Akimoto ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Plasma Lipid ◽  
Eicosatrienoic Acid ◽  
Lipid Fractions

The effects of altering dietary fatty acid and vitamin E content on the chemical, physical and organoleptic quality of pig meat and fat

1996 ◽  
Vol 1996 ◽  
pp. 30-30
Author(s):  
C.O. Leskanich ◽  
K.R. Matthews ◽  
C.C. Warkup ◽  
R.C. Noble
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Vitamin E ◽  
Human Health ◽  
Acid Composition ◽  
Oxidative Degradation ◽  
Meat Products ◽  
Dietary Vitamin ◽  
Affecting Factors

The tissues of animals for food use have come to be associated with a predominance of saturated and monounsaturated fatty acids, the result of which has been to contribute to the perceived human dietary imbalance of fatty acids. The fact that porcine tissues assume a fatty acid composition similar to that of the respective diet has enabled the composition to be altered with respect to human dietary needs (Morgan et al, 1992). The fatty acid compositions of rapeseed and fish oils are characterised by a number of factors of relevance to human health recommendations (BNF, 1992). Thus, rapeseed oil contains a low content of saturates, a moderate content of linoleic acid and a high content of α-linolenic acid whilst fish oil contains high levels of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Although benefiting the nutritional value of meat/fat, the feeding of increased levels of highly polyunsaturated fatty acids has the potential, in theory at least, of adversely affecting organoleptic and various physical properties. Such adverse effects could be manifested during and/or after the preparation and cooking of the meat or meat products at which times the oxidative degradation of fatty acids is maximised. The inclusion of dietary vitamin E has a range of beneficial effects on meat quality principally due to its antioxidant effects. The present experiment was an attempt to optimise the fatty acid composition of pork and pork products for human health purposes whilst not adversely affecting factors controlling consumer acceptability.

Fatty acid composition and vitamin E of meat as influenced by age and season of slaughter in Mediterranean light lamb

2019 ◽  
Vol 170 ◽  
pp. 97-101 ◽  
Author(s):  
Angela Gabriella D’Alessandro ◽  
Giuseppe Maiorano ◽  
Donato Casamassima ◽  
Giovanni Martemucci
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Vitamin E ◽  
Acid Composition
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