Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang, 25354, Republic of Korea.
Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang, 25354, Republic of Korea.
Sci Rep. 2021 Jun 25;11(1):13354. doi: 10.1038/s41598-021-92908-3.
To evaluate the relationship between muscle fiber characteristics and the quality of frozen/thawed pork meat, four different muscles, M. longissimus thoracis et lumborum (LTL), M. psoas major (PM), M. semimembranosus (SM), and M. semitendinosus (ST), were analyzed from twenty carcasses. Meat color values (lightness, redness, yellowness, chroma, and hue) changed due to freezing/thawing in LTL, which showed larger IIAX, IIX, and IIXB fibers than found in SM (P < 0.05). SM and ST showed a significant decrease in purge loss and an increase in shear force caused by freezing/thawing (P < 0.05). Compared with LTL, SM contains more type IIXB muscle fibers and ST had larger muscle fibers I and IIA (P < 0.05). PM was the most stable of all muscles, since only its yellowness and chroma were affected by freezing/thawing (P < 0.05). These results suggest that pork muscle fiber characteristics of individual cuts must be considered to avoid quality deterioration during frozen storage.
为了评估肌肉纤维特性与冻融猪肉品质之间的关系,从 20 个胴体中分析了 4 种不同的肌肉,即胸腰椎最长肌(LTL)、腰大肌(PM)、半腱肌(SM)和半膜肌(ST)。在 LTL 中,由于冷冻/解冻,肉色值(亮度、红色、黄色、彩度和色调)发生了变化,LTL 中发现的 IIAX、IIX 和 IIXB 纤维比 SM 中的大(P<0.05)。SM 和 ST 的汁液损失显著减少,冷冻/解冻导致的剪切力增加(P<0.05)。与 LTL 相比,SM 含有更多的 IIXB 型肌肉纤维,而 ST 则具有更大的 I 和 IIA 型肌肉纤维(P<0.05)。PM 是所有肌肉中最稳定的,因为只有它的黄色和彩度受到冷冻/解冻的影响(P<0.05)。这些结果表明,必须考虑个体切块的猪肉肌肉纤维特性,以避免冷冻储存过程中的质量恶化。