scholarly journals Effects of dietary polyunsaturated fatty acids on the composition of the individual lipids of turkey breast and leg muscle

1967 ◽  
Vol 21 (3) ◽  
pp. 691-714 ◽  
Author(s):  
T. S. Neudoerffer ◽  
C. H. Lea
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Fish Oil ◽  
Acid Composition ◽  
The Other ◽  
Lipid Fractions ◽  
Anchovy Oil ◽  
Leg Muscle ◽  
Muscle Lipids

1. Groups of turkeys were given, to 10 weeks of age: diets E, basal, containing 2.3% mainly cereal lipid; A, basal plus 2.5% beef fat; B, basal plus 2.5% anchovy oil; C, as B, plus 0.02% ethoxyquin; D, basal plus 5% anchovy oil. Lipids from breast and leg muscle of all five groups were fractionated by thin-layer chromatography into five ‘neutral’ and six phospholipid fractions and the fatty-acid composition of each was determined by gas–liquid chromatography.2. Individual lipid fractions differed widely in fatty-acid composition and in the degree to which they could be influenced by dietary fat supplements. Small but usually consistent differences were observed between corresponding fractions from breast and leg. Sphingomyelin (SP) and lysophosphatidylcholine contained largely saturated acids (76–80%); the other phospholipids were 44–48% and the ‘neutral’ lipids 38–50% saturated. Phosphatidylserine (PS), phosphatidylinositol(PI) and, in less degree, phosphatidylethanolamine (PE) were rich in stearic acid, though palmitic was much more abundant in the diets and in the other muscle lipids. SP contained no acid more unsaturatedthan linoleic (1–2%). PE and PI were richest in arachidonic and PE and PI in other polyene acids.3. The effects of beef fat on the muscle lipids were small and mainly on the ‘neutral’ fractions.4. The polyunsaturated fatty acids of the fish oil extensively displaced linoleic (and oleic) acids from all fractions (except SP); arachidonic acid was displaced from PE but not from PI.5. The degree to which the fish-oil polyunsaturated acids of the three series entered the muscle lipids varied with the acid and with the fraction. Docosahexaenoic acid (22:6) reached a concentration of 20–25% in PE, nearly five times as great as its concentration in the dietary lipid.6. Hydrolysis with phospholipase A showed that most of the unsaturated fatty acids were present in the 2-position of PC and PE, but the positional specificity was not complete, particularly for the less highly unsaturated acids.7. The antioxidant ethoxyquin had no effect on the fatty-acid composition of any of the muscle lipid fractions.

The effects of fat source and breed on the fatty acid composition of lamb muscle and adipose tissue

1999 ◽  
Vol 1999 ◽  
pp. 115-115 ◽  
Author(s):  
A.M. Wachira ◽  
L.A. Sinclair ◽  
R.G. Wilkinson ◽  
G. Demirel ◽  
M. Enser ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Vitamin E ◽  
Fish Oil ◽  
Acid Composition ◽  
Previous Experiment ◽  
Dietary Pufa ◽  
Long Chain

The benefits of long chain polyunsaturated fatty acids (PUFA) to human health, especially those of the n-3 series are now widely recognised. In a previous experiment (Wachira et al. 1998) supplementing diets with whole linseed or fish oil increased n-3 fatty acid levels in lamb muscle. To raise these further the whole linseed can be treated with formaldehyde to increase protection in the rumen. Dietary antioxidants such as vitamin E can control lipid oxidation but information on their effects on lamb performance and fatty acid composition is limited. The current experiments investigated the effects of different dietary PUFA sources and vitamin E levels on growth and fatty acid composition in two sheep breeds. Detailed results of the effects of vitamin E are presented in the accompanying abstract by Enser et al.

scholarly journals Changes in plasma fatty acid composition after intake of a standardised breakfast in prepubertal obese children

2007 ◽  
Vol 99 (4) ◽  
pp. 909-917 ◽  
Author(s):  
M. Gil-Campos ◽  
E. Larqué ◽  
M. C. Ramírez-Tortosa ◽  
J. Linde ◽  
I. Villada ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Normal Weight ◽  
Plasma Fatty Acid ◽  
Obese Children ◽  
Prepubertal Children ◽  
Plasma Fatty Acid Composition ◽  
Lipid Fractions

Obese patients typically show a pattern of dyslipidaemia and changes in plasma fatty acid composition reflecting abnormalities in lipoprotein metabolism and dietary habits. Animals and obese adults have been widely studied; however, contradictory results have been published in children. The objective was to assess changes in plasma fatty acid composition in total plasma lipids and plasma lipid fractions in obese prepubertal children compared with those of normal weight and to evaluate changes in postprandial plasma fatty acids during a 3 h period after intake of a standardised breakfast. The study was a case–control study with thirty-four obese and twenty normal-weight prepubertal children (Tanner 1). Anthropometric and metabolic variables and fatty acid concentrations were measured in plasma and its fractions. Liquid chromatography was used to separate lipid fractions and GLC to quantify fatty acids. Plasma total fatty acids (TFA), SFA, MUFA and PUFA concentrations were higher in obese than in control children. Except for 18 : 0, 18 : 3n-3, 20 : 4n-6 and n-3 PUFA, all fatty acids in TAG were also elevated in the obese group. Fatty acids 16 : 1n-7, 18 : 0, 18 : 1n-9, 20 : 2n-6, TFA and MUFA significantly decreased between the 2nd and 3rd hour in normal-weight v. obese children. The concentration of 16 : 1n-7 was positively and the proportion of 20 : 4n-6 inversely associated with a significant increase in risk of obesity. Obese prepubertal children show an altered plasma fatty acid profile and concentrations, mainly related to the TAG fatty acid profile, with a lower clearance of fatty acids v. normal-weight prepubertal children.

Effect of forage type and proportion of concentrate in the diet on milk fatty acid composition in cows given sunflower oil and fish oil

2005 ◽  
Vol 80 (2) ◽  
pp. 225-238 ◽  
Author(s):  
K. J. Shingfield ◽  
C. K. Reynolds ◽  
B. Lupoli ◽  
V. Toivonen ◽  
M. P. Yurawecz ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Fish Oil ◽  
Acid Composition ◽  
Sunflower Oil ◽  
Milk Fat ◽  
Milk Fatty Acid ◽  
Grass Silage ◽  
Forage Type

AbstractBased on the potential benefits ofcis-9,trans-11 conjugated linoleic acid (CLA) for human health there is a need to develop effective strategies for enhancing milk fat CLA concentrations. In this experiment, the effect of forage type and level of concentrate in the diet on milk fatty acid composition was examined in cows given a mixture of fish oil and sunflower oil. Four late lactation Holstein-British Friesian cows were used in a 4 × 4 Latin-square experiment with a 2 × 2 factorial arrangement of treatments and 21-day experimental periods. Treatments consisted of grass (G) or maize (M) silage supplemented with low (L) or high (H) levels of concentrates (65 : 35 and 35 : 65; forage : concentrate ratio, on a dry matter (DM) basis, respectively) offered as a total mixed ration at a restricted level of intake (20 kg DM per day). Lipid supplements (30 g/kg DM) containing fish oil and sunflower oil (2 : 3 w/w) were offered during the last 14 days of each experimental period. Treatments had no effect on total DM intake, milk yield, milk constituent output or milk fat content, but milk protein concentrations were lower (P< 0.05) for G than M diets (mean 43.0 and 47.3 g/kg, respectively). Compared with grass silage, milk fat contained higher (P< 0.05) amounts of C12:0, C14:0, trans C18:1and long chain ≥ C20 (n-3) polyunsaturated fatty acids (PUFA) and lower (P< 0.05) levels of C18:0and trans C18:2when maize silage was offered. Increases in the proportion of concentrate in the diet elevated (P< 0.05) C18:2(n-6) and long chain ≥ C20 (n-3) PUFA content, but reduced (P< 0.05) the amount of C18:3(n-3). Concentrations oftrans-11 C18:1in milk were independent of forage type, but tended (P< 0.10) to be lower for high concentrate diets (mean 7.2 and 4.0 g/100 g fatty acids, for L and H respectively). Concentrations oftrans-10 C18:1were higher (P< 0.05) in milk from maize compared with grass silage (mean 10.3 and 4.1 g/100 g fatty acids, respectively) and increased in response to high levels of concentrates in the diet (mean 4.1 and 10.3 g/100 g fatty acids, for L and H, respectively). Forage type had no effect (P> 0.05) on total milk conjugated linoleic acid (CLA) (2.7 and 2.8 g/100 g fatty acids, for M and G, respectively) orcis-9,trans-11 CLA content (2.2 and 2.4 g/100 g fatty acids). Feeding high concentrate diets tended (P< 0.10) to decrease total CLA (3.3 and 2.2 g/100 g fatty acids, for L and H, respectively) andcis-9,trans-11 CLA (2.9 and 1.7 g/100 g fatty acids) concentrations and increase milktrans-9,cis-11 CLA andtrans-10,cis-12 CLA content. In conclusion, the basal diet is an important determinant of milk fatty acid composition when a supplement of fish oil and sunflower oil is given.

Effects of fish oil on growth kinetics and lipid accumulation in black soldier fly larvae

2021 ◽  
pp. 1-8
Author(s):  
A.K.S. Knudsen ◽  
E.E. Jespersen ◽  
M.J. Markwardt ◽  
A. Johansen ◽  
A.P. Ortind ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Fish Oil ◽  
Acid Composition ◽  
Growth Kinetics ◽  
Lipid Content ◽  
Oil Content ◽  
Black Soldier Fly ◽  
Fermentation Products

The main purpose of this study is to characterise how substrate lipid content affects growth kinetics of black soldier fly (BSF) larvae. Growth curves of larvae were characterised in substrates composed of chicken feed supplemented by 0-30% fish oil, and lipid content and fatty acid composition of the prepupae were quantified to examine up-take and assimilation of fish oil by the larvae. Increasing contents of fish oil resulted in reduced specific growth rates, reduced weight of the prepupae, and increased mortality. The prepupae had similar lipid contents at 0-20% fish oil, while 30% fish oil increased the lipid content of prepupae. In contrast, the fatty acid composition of the prepupae showed a strong dependency on substrate fish oil content, indicating that the larvae increased their uptake of fish oil with increasing fish oil content. C16-C22 fatty acids were bioaccumulated from the fish oil, but particularly C20 and C22 fatty acids were apparently also shortened or further metabolised. Microbial fermentation products rapidly accumulated in the substrates, and substrate lipids and carbohydrates were preserved and remained available for the larvae throughout their growth period. These results point out that although BSF larvae can utilise high contents of substrate lipids, it may be at the expense of reduced growth performance, and with limited effects on the composition of their biomass.

Effect of long term supplementation with dietary lipids ongrowth and fatty acid composition of rabbit’s brain

2017 ◽  
Author(s):  
Shaista Arzoo ◽  
Doha Mustafa Al Nouri
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Fish Oil ◽  
Acid Composition ◽  
Saturated Fatty Acids ◽  
Dietary Lipids ◽  
Good Effect ◽  
Fish Oil Diet

The purpose of this study was to investigate the effect of long-term supplementation with dietary lipids on growth and fatty acid composition of rabbit’s brain. Soybean oil, fish oil, sesame oil, docosahexaenoic acid and arachidonic acid were fed to weanling rabbits for 100 days. The rabbits were decapitated and brain sample was removed, homogenized and fatty acid concentration was measured by gas chromatography. Dietary lipids had a distinct effect on growth rate only in males. Rabbits fed the fish oil diet showed the highest total w-3 fatty acids and lowest w-6/w-3 ratios. Rabbits fed the DHA diet had highest total saturated fatty acids and lowest values of total MUFA, total PUFA, total w-6, and total w-3 in females. This study shows that w-6/w-3 ratios have tremendous effect on the fatty acid composition of rabbit’s brain. Effect of treatment was not significant among different gender except for total saturated, ARA, C20:1 and C16:0. FO, DHA and DHA+ARA groups showed the w-6/w-3 ratios within the recommended range. This study shows that fatty acid composition of brain can be modulated by dietary lipids and long-term supplementation of dietary lipids especially fish oil (FO) has very good effect on the fatty acid composition of rabbit’s brain.

Lipids and Fatty Acids of the American (Crassostrea virginica) and European Flat (Ostrea edulis) Oysters from a Common Habitat, and After One Feeding with Dicrateria inornata or Isochrysis galbana

1974 ◽  
Vol 31 (4) ◽  
pp. 403-409 ◽  
Author(s):  
T. Watanabe ◽  
R. G. Ackman
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Crassostrea Virginica ◽  
Isochrysis Galbana ◽  
Ostrea Edulis ◽  
Unicellular Algae ◽  
Unusual Fatty Acids ◽  
Lipid Fractions

The oysters Crassostrea virginica and Ostrea edulis from a common habitat showed species-oriented fatty acid composition patterns for total lipids and lipid fractions. Attempts to modify these patterns by offering the unicellular algae Dicrateria inornata and Isochrysis galbana as food suggest that the oysters rapidly convert qualitatively or quantitatively unusual fatty acids to these species-oriented compositions, although only in the combination of D. inornata and O. edulis was enough fatty acid taken up to modify the oyster fatty acid composition in an easily detectable way. The unusual C22 nonmethylene-interrupted diunsaturated fatty acid components were not found in the O. edulis used for this study.

Evaluation of cooling strategies for pumping of milk – Impact of fatty acid composition on free fatty acid levels

2005 ◽  
Vol 72 (4) ◽  
pp. 476-481 ◽  
Author(s):  
Lars Wiking ◽  
Hanne C Bertram ◽  
Lennart Björck ◽  
Jacob H Nielsen
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Free Fatty Acids ◽  
Acid Composition ◽  
Milk Fat ◽  
Saturated Fat ◽  
The Other ◽  
Fat Globules ◽  
Milk Fat Globules

Cooling strategies for pumping of raw milk were evaluated. Milk was pumped for 450 s at 31 °C, or pumped after cooling to 4 °C and subsequently subjected to various incubation times. Two types of milk were used; i.e. milk from cows fed a diet high in saturated fat supplements resulting in significantly larger milk fat globules than the other type of milk which comes from cows fed a low-fat diet that stimulates high de novo fat synthesis. The content of liquid fat was determined by low-field 1H NMR, which showed that milk from cows given the saturated fat diet also contained less liquid fat at both 4 ° and 31 °C than the other type of milk. This can be ascribed to the differences in the fatty acid composition of the milk as a result of the fatty acid composition of the diets. After pumping of the milk at 31 °C, measurement of fat globule size distribution revealed a significant coalescence of milk fat globules in the milk obtained from the saturated fat diet due to pumping. Pumping at 4 °C or pumping the other type of milk did not result in coalescence of milk fat globules. Formation of free fatty acids increased significantly in both types of milk by pumping at 31 °C. Cooling the milk to 4 °C immediately before pumping inhibited an increased content of free fatty acids. However, when the milk was incubated at 4 °C for 60 min after cooling and then subjected to pumping, a significant increase in the formation of free fatty acids was observed in both types of milk. It is suggested that this increase in free fatty acids is caused by transition of polymorphic crystal forms or higher level of attached lipoprotein lipases to the milk fat globule before pumping.

scholarly journals Fatty Acid Composition of the Muscle Lipids of Five Fish Species in Işıklı and Karacaören Dam Lake, Turkey

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Ozcan Baris Citil ◽  
Leyla Kalyoncu ◽  
Oguzhan Kahraman
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Fish Species ◽  
Cyprinus Carpio ◽  
Carassius Carassius ◽  
Tinca Tinca ◽  
Scardinius Erythrophthalmus ◽  
Muscle Lipids

Total fatty acid composition of muscle lipids in some fish species (Cyprinus carpio(Işıklı Dam Lake),Tinca tinca(Işıklı Dam Lake),Scardinius erythrophthalmus(Işıklı Dam Lake),Cyprinus carpio(Karacaören Dam Lake), andCarassius carassius(Karacaören Dam Lake)) was determined by gas chromatography. Polyunsaturated fatty acids (PUFAs) ofCyprinus carpio(Işıklı Dam Lake) were found higher than PUFA of other species. Palmitic acid was the highest saturated fatty acid (SFA) inTinca tinca(24.64%). Oleic acid was the highest monounsaturated fatty acid (MUFAs) inCyprinus carpio(Işıklı Dam Lake) (19.25%). The most abundant polyunsaturated fatty acid inScardinius erythrophthalmuswas docosahexaenoic acid (DHA) (17.94%). Totalω3 fatty acid composition was higher than the totalω6 fatty acids ofCyprinus carpioin both dam lakes.ω3/ω6 rates inCyprinus carpio(Işıklı Dam Lake),Tinca tinca, Scardinius erythrophthalmus, Cyprinus carpio(Karacaören), andCarassius carassiuswere 2.12, 1.19, 2.15, 2.87, and 2.82, respectively.

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.

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