低场核磁共振弛豫测量与两种传统方法在测定猪肉持水性中的比较研究

Comparative study of low-field NMR relaxation measurements and two traditional methods in the determination of water holding capacity of pork.

作者信息

Bertram H C, Andersen H J, Karlsson A H

机构信息

Department of Animal Product Quality, Danish Institute of Agricultural Sciences, Research Centre Foulum, PO Box 50, DK-8830 Tjele, Denmark.

出版信息

Meat Sci. 2001 Feb;57(2):125-32. doi: 10.1016/s0309-1740(00)00080-2.

DOI:10.1016/s0309-1740(00)00080-2

PMID:22061354

Abstract

The correlation between transverse relaxation, T(2,) and water holding capacity (WHC) determined either by Honikels bag method (Honikel, 1998) or centrifugation has been investigated in meat samples from m. longissimus dorsi (LD) 24 h post mortem from 74 pigs. Bi-exponential analysis of the transverse relaxation, T(2), showed highly significant correlations between both the two NMR time constants (T(21),T(22)) and water holding capacity determined by both Honikels bag method (r(T(21))=-0.72 and r(T(22))=0.77) and centrifugation (r(T(21))-0.50 and r(T(22))=0.75). This shows that transverse relaxation measurement is an efficient method for determination of water holding capacity in pork. Significant correlations were also found between T(21) and T(22) measured 24 h post mortem and pH measured at various time post mortem. This indicates that transverse relaxation, T(2), reflects pH-induced structural changes occurring in muscles post mortem.

摘要

通过霍尼克尔斯袋法（霍尼克尔斯，1998年）或离心法测定的横向弛豫T(2)与持水能力（WHC）之间的相关性，已在74头猪死后24小时的背最长肌（LD）肉样中进行了研究。横向弛豫T(2)的双指数分析表明，两个核磁共振时间常数（T(21)，T(22)）与通过霍尼克尔斯袋法测定的持水能力（r(T(21)) = -0.72，r(T(22)) = 0.77）以及离心法测定的持水能力（r(T(21)) = -0.50，r(T(22)) = 0.75）之间均存在高度显著的相关性。这表明横向弛豫测量是测定猪肉持水能力的一种有效方法。在死后24小时测量的T(21)和T(22)与死后不同时间测量的pH值之间也发现了显著相关性。这表明横向弛豫T(2)反映了死后肌肉中发生的pH值诱导的结构变化。