Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1187659 | Food Chemistry | 2011 | 7 Pages |
Abstract
Multiple stable isotope ratios (δ2H, δ13C, δ18O and δ34S) were measured in muscle, muscle lipids and lipid fractions collected from 28 lambs, subjected to a diet-switch and raised on two energy allowances (EAs), to determine tissue turnover and diet-tissue fractionation. The diet-muscle fractionations prior to the diet-switch were estimated to be â44.0â°, +1.9â° and 0â° for H, C and S, respectively, while the drinking water was demonstrated to be the main source of muscle O and thus δ18O variation. The diet-intra-muscular lipid fractionations prior to the diet-switch were estimated to be â172.7â°, â1.3â° and â11.5â° for H, C and O, respectively. The C half-lives of muscle were determined to be 75.7 and 91.6 days for animals receiving the high and low EA, respectively. Extracting temporally resolved pre-slaughter dietary information from meat by analysing bulk muscle, muscle lipids and muscle lipid fractions appeared to be not practicable due to possible incomplete turnover of lipids.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Sabine M. Harrison, Olaf Schmidt, Aidan P. Moloney, Simon D. Kelly, Andreas Rossmann, Antje Schellenberg, Federica Camin, Matteo Perini, Jurian Hoogewerff, Frank J. Monahan,