期刊
MEAT SCIENCE
卷 94, 期 1, 页码 27-33出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2012.12.014
关键词
NIRS; Adipose tissue; Fatty acid; Sunflower; Flaxseed
资金
- AAFC-Peer Review Program
- Alberta Meat and Livestock Agency
- Spanish National Research Council (CSIC)
- European Social Fund under the program JAE-Doc Junta para la Ampliacion de Estudios
NIRS potential to estimate the proportion of PUFA and their biohydrogenation products in adipose tissues from cattle fed sunflower or flaxseed was tested. Immediately after skinning, perirenal and subcutaneous fat samples from 63 steers were collected, scanned intact at 37 degrees C and 33 degrees C, respectively, over a NIR spectral range from 400 to 2498 nm using benchtop equipment and then analyzed for fatty acid composition. NIRS calibrations in perirenal fat showed high predictability for total and major omega - 6 and omega - 3, conjugated linolenic acids, t,t-conjugated linoleic acids (CLA), non-CLA dienes and trans-monounsaturated fatty acids, with R-2 (RMSECV, %) of 0.88-0.89 (0.16-0.20), 0.89-0.91 (0.07-0.08), 0.86-0.89 (0.01-0.09), 0.82 (0.07), 0.89 (0.46) and 0.86-0.88 (0.87-1.29), respectively. NIRS predictions in subcutaneous fat were less reliable, probably due to lower fatty acid variability. The results show NIRS to be a useful technique for the early, fast and relatively inexpensive estimation of proportions of fatty acids with potential human health effects in cattle perirenal fat. (c) 2013 Elsevier Ltd. All rights reserved.
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