Effect of extensive feeding on α-tocopherol concentration and oxidative stability of muscle microsomes from Iberian pigs
- 1 December 1997
- journal article
- research article
- Published by Cambridge University Press (CUP) in Animal Science
- Vol. 65 (3), 515-520
- https://doi.org/10.1017/s1357729800008729
Abstract
The effect of extensive feeding, confinement and diet supplementation with a-tocopheryl acetate (100 mg/kg) on the fatty acid composition and tocopherol concentration of microsome extracts and their susceptibility to oxidation was studied in Iberian pigs. The diet of pigs raised extensively was mostly composed of acorn and grass. The a-tocopherol contents of acorn and grass were 20 and 171 mg/kg dry matter, respectively. Microsomal fatty acid composition showed no differences among groups. Pigs feeding extensively had a higher concentration of a-tocopherol in muscle and microsomes than pigs given mixed diet with the basal level of a-tocopheryl acetate (P < 0·05) but lower values than pigs given supplementary levels (100 mg/kg) (P < 0·05). Microsomal fractions from pigs given mixed diet with a basal level of a-tocopheryl acetate were significantly more susceptible to iron-induced lipid oxidation than extract from pigs given diets containing a supplementary level (P < 0·05). Microsomal extracts from pigs feeding extensively had the lowest oxidation rate (P < 0·05), suggesting that other dietary constituents may play a role in the stabilization of microsomal lipids.Keywords
This publication has 23 references indexed in Scilit:
- Influence of finishing diet on fatty acid profiles of intramuscular lipids, triglycerides and phospholipids in muscles of the Iberian pigMeat Science, 1997
- Determination of α-tocopherol in pork with high intramuscular fat contentGrasas y Aceites, 1996
- Physiologische Bedeutung unverseifbarer Komponenten von NahrungsfettenChemische Umschau auf dem Gebiet der Fette, Oele, Wachse und Harze, 1995
- Influence of diet on lipid oxidation and membrane structure in porcine muscle microsomesJournal of Agricultural and Food Chemistry, 1994
- Distribution of α-tocopherol in early foliage samples in several forage cropsPhytochemistry, 1993
- Influence of dietary fat and α-tocopherol supplementation on lipid oxidation in porkMeat Science, 1992
- Effects of Dietary Oils and α‐Tocopherol Supplementation on Lipid Composition and Stability of Broiler MeatJournal of Food Science, 1989
- Vitamin e and Polyunsaturated Fatty Acids in Swedish Feedstuffs for CattleActa Agriculturae Scandinavica, 1987
- Reproduction of nutritional degenerative myopathy in the post ruminant calfPublished by Wiley ,1981
- A RAPID METHOD OF TOTAL LIPID EXTRACTION AND PURIFICATIONCanadian Journal of Biochemistry and Physiology, 1959