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 −44.0‰, +1.9‰ and 0‰ 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 −172.7‰, −1.3‰ and −11.5‰ 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

Harrison, S.; Schmidt, O.; Moloney, A.P.; Kelly, S.D.; Rossmann, A.; Schellenberg, A.; Camin, F.; Perini, M.; Hoogewerff, J.; Monahan, F.J. (2011). Tissue turnover in ovine muscles and lipids as recorded by multiple (H, C, O, S) stable isotope ratios. FOOD CHEMISTRY, 124 (1): 291-297. doi: 10.1016/j.foodchem.2010.06.035 handle: http://hdl.handle.net/10449/19369

Tissue turnover in ovine muscles and lipids as recorded by multiple (H, C, O, S) stable isotope ratios

Camin, Federica;Perini, Matteo;
2011-01-01

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 −44.0‰, +1.9‰ and 0‰ 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 −172.7‰, −1.3‰ and −11.5‰ 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
Settore CHIM/01 - CHIMICA ANALITICA
2011
Harrison, S.; Schmidt, O.; Moloney, A.P.; Kelly, S.D.; Rossmann, A.; Schellenberg, A.; Camin, F.; Perini, M.; Hoogewerff, J.; Monahan, F.J. (2011). Tissue turnover in ovine muscles and lipids as recorded by multiple (H, C, O, S) stable isotope ratios. FOOD CHEMISTRY, 124 (1): 291-297. doi: 10.1016/j.foodchem.2010.06.035 handle: http://hdl.handle.net/10449/19369
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