ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Longissimus muscle of feedlot steers contained less moisture and more triglycerides (TG) but similar amounts of cholesterol and lipid phosphorus when compared to muscle of range steers. A 100-g portion of the muscle from feedlot steers provided more of all fatty acids analyzed except iso- and anteiso-tridecanoic and pentadecanoic acids (br 13:0, br 15:0) and octadecatrienoic acid (18:3). Structures of the intramuscular TG were not influenced by dietary treatment. Medium chain saturated acids (10:0 to 15:0) were distributed throughout all 3 positions, 16:0 predominated in the sn-1 position, 18:0 and 20:0 in the sn-1 and sn-3 positions. Br 13:0 and br 15:0 predominated in the sn-2 position and were essentially absent from the sn-3 position. Monounsaturated acids, with the exception of trans octadecenoic acid (trans 18:1), were found mainly in the sn-2 and sn-3 positions. Trans 18:1 predominated in the sn-1 and sn-3 positions thereby resembling a long chain saturated acid, Octadecadienoic acid (18:2) and 18:3 were about equally divided between positions sn-2 and sn-3. Tram 18:1 comprised 1.9 and 1.3% of total intramuscular fatty acids from range and feedlot steers, respectively. The structures of intramuscular TG, with respect to 18:2 and saturated acids, did not resemble those of native peanut oil which has been reported to be more atherogenic than randomized peanut oil.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1981.tb04166.x
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