Joo Seon-Tea
Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Korea.
Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Korea.
Korean J Food Sci Anim Resour. 2018 Sep;38(4):823-828. doi: 10.5851/kosfa.2018.e18. Epub 2018 Sep 30.
The purpose of this study was to evaluate the suitability of the released water (RW) method for measuring water-holding capacity (WHC) by pressure and filter-paper absorption within two thin plastic films. One hundred fifty pork loins with considerable variations in WHC (three pork qualities: PSE, pale, soft, and exudative; RFN, reddish-pink, firm, and nonexudative; and DFD, dark, firm, and dry; 50 pork loins in each pork quality group) were used to measure drip loss (DL)% and RW % after applying different loads (1.5, 2.0, 2.5, 3.0 and 3.5 kg). Percentages of DL and RW were significantly (p<0.05) different among pork quality groups. The RW % of 2.5 kg load sample was significantly (p<0.05) higher than that of 2.0 kg or 1.5 kg load sample. However, there were no significant (p>0.05) differences in RW % among 2.5 kg, 3.0 kg, and 3.5 kg load samples for all three pork quality groups. The RW % was highly and positively correlated (r>0.95; p<0.001) with DL %. The highest correlation was observed between DL % and RW % of 2.5 kg load sample (r=0.97; p<0.001). Among all RW loads within each quality groups, the highest correlation between DL % and RW % was observed for 2.5 kg load sample (r=0.43, 0.66, and 0.46 for PSE, RFN and DFD quality groups, respectively, p<0.001). These results imply that applying 2.5 kg load is the best for determination of RW %. It is recommended as a reference method to assess DL % of pork muscles.
本研究的目的是评估在两片薄塑料薄膜内通过压力和滤纸吸收法测量持水能力（WHC）的释水（RW）方法的适用性。使用150块持水能力差异较大的猪里脊肉（三种猪肉品质：PSE，苍白、柔软且渗出；RFN，微红、结实且不渗出；DFD，暗黑、结实且干燥；每个猪肉品质组50块猪里脊肉），在施加不同负荷（1.5、2.0、2.5、3.0和3.5千克）后测量滴水损失（DL）百分比和RW百分比。猪肉品质组之间的DL和RW百分比存在显著差异（p<0.05）。2.5千克负荷样本的RW百分比显著高于2.0千克或1.5千克负荷样本（p<0.05）。然而，对于所有三个猪肉品质组，2.5千克、3.0千克和3.5千克负荷样本的RW百分比之间没有显著差异（p>0.05）。RW百分比与DL百分比高度正相关（r>0.95；p<0.001）。在2.5千克负荷样本的DL百分比和RW百分比之间观察到最高相关性（r=0.97；p<0.001）。在每个品质组的所有RW负荷中，2.5千克负荷样本的DL百分比和RW百分比之间的相关性最高（PSE、RFN和DFD品质组的r分别为0.43、0.66和0.46，p<0.001）。这些结果表明，施加2.5千克负荷最适合测定RW百分比。建议将其作为评估猪肌肉DL百分比的参考方法。
