Proximate, mineral and fatty acid composition of semimembranosus and cardiac muscles from grass- and grain-fed and zeranol-implanted cattle
Proximate, mineral and fatty acid composition of semimembranosus and cardiac muscles from grass- and grain-fed and zeranol-implanted cattle
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草饲和谷物饲喂以及植入玉米赤霉醇的牛的半膜肌和心肌的近似矿物质和脂肪酸组成
DOI：
10.1016/s0308-8146(97)00134-9
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
W. G. Moody
中科院分区：
文献类型：
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作者：
S. Srinivasan;Y. Xiong;S. P. Blanchard;W. G. Moody
测定了饲用草(G)和饲用草（GG）和饲用草（GGP）的牛的半膜肌（SM）和心肌的化学成分（近代物、矿物质和脂肪酸）。GG和GGP牛SM肌肉的蛋白质含量高于G牛（p≤0.05），水分含量低于G牛（p≤0.05）。GG牛心肌脂肪含量高于G牛（p≤0.05）。籽粒添加（GG和GGP）使SM肌钾含量升高，而心肌钾含量降低。谷物补充也增加了亚油酸，但减少了多不饱和脂肪酸（PUFA）。无论饲料类型如何，心肌的多聚脂肪酸含量，尤其是亚麻酸和花生四烯酸含量是SM肌的3倍。G牛SM和心肌中PUFA浓度高于GG和GGP牛，这可能使G牛的肌肉更容易氧化。
Chemical composition (proximate, minerals, and fatty acids) of semimembranosus (SM) and cardiac muscle from cattle fed grass (G) and grain on grass without (GG) or with (GGP) zeranol implant were determined. The protein content of SM muscle from GG and GGP cattle was higher (p≤0.05) while the moisture content was lower (p≤0.05) than that from G cattle. The lipid content of cardiac muscle from GG cattle was higher (p≤0.05) compared to that of G cattle. Grain supplementation (GG and GGP) increased the potassium level in SM muscle while a decrease was observed in cardiac muscle. Grain supplementation also increased linoleic acid but decreased polyunsaturated (PUFA) fatty acids in both muscles. There was 3 times more PUFA, particularly linolenic and arachidonic acids, in cardiac muscle than in SM muscle irrespective of the feed type. The concentrations of PUFA in SM and cardiac muscle were higher for G cattle than for GG and GGP cattle, which could make muscles from G cattle more prone to oxidation.