کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2454365 1110386 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of Implanting Beef Steers with Zeranol on Fatty Acid Composition of Subcutaneous and Intramuscular Fat1
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Effects of Implanting Beef Steers with Zeranol on Fatty Acid Composition of Subcutaneous and Intramuscular Fat1
چکیده انگلیسی
The effect of implanting with zeranol on modulation of fatty acid composition, including omega-3 and omega-6 fatty acids, of subcutaneous (s.c.) and i.m. fat of steers was investigated, and carcasses were evaluated for quality grade and yield grade components. Forty steers were divided into 2 groups (20 steers/group); both groups were fed the same diet. Steers were fed to a constant 10 mm fat thickness (measured by ultrasound). Implanting had no effect (P > 0.05) on quality or yield grade components, but the concentration of polyunsaturated fatty acids (PUFA), including n-3 and n-6 fatty acids, was greater (P < 0.05) in the s.c. fat of implanted vs. non-implanted steers. Concentration of the saturated fatty acids (SFA) was less (P < 0.05) in the s.c. fat of implanted steers than in the s.c. fat of non-implanted steers. However, the amount of monounsaturated fatty acids was greater (P < 0.05) in the s.c. fat of non-implanted steers than in the s.c. fat of implanted steers. In the i.m. fat of implanted steers, the content of PUFA, including n-3 and n-6 fatty acids, and the amount of one monounsaturated fatty acid were greater (P < 0.05) than in the i.m. fat of non-implanted steers. The concentration of SFA was less (P < 0.05) in the i.m. fat of implanted vs. non-implanted steers. Implantation with zeranol caused an increase in the unsaturated:saturated fatty acid ratio and an increase in n-3:n-6 PUFA ratio. These results indicated that zeranol had no effect on carcass quality, but it had a positive effect in changing the fatty acid composition of the s.c. and the i.m. fat of steers from the saturated to unsaturated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 22, Issue 4, August 2006, Pages 301-306
نویسندگان
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