The relationship between mineral concentrations, and the relationship of mineral concentrations with physicochemical characteristics in muscles were investigated using the Longissimus thoracis (LT) muscle of 44 Japanese Black steers. We determined moisture content, fat content, meat color, fatty acid composition and mineral concentrations in the LT muscle. Magnesium (Mg), potassium (K) and zinc (Zn) concentrations had negative correlations with fat content, but sodium (Na), manganese (Mn), copper (Cu) and molybdenum (Mo) concentrations were not correlated with fat content. The concentrations of Mg, Mn, Fe, Cu and Zn largely and positively contributed to the first principal component of mineral concentrations. Because the red muscle was rich in these minerals compared to the white muscle, the variation of these minerals probably results from the abundance of red fibers in the LT muscle. The concentration of K was positively correlated with moisture content but Na concentration was not related to moisture content, suggesting that the intracellular fluid volume can largely affect moisture content. The results of the present experiment suggest that mineral concentrations reflect some traits such as not only fat content but also the composition of myofiber type and the intracellular fluid volume in the LT muscle of Japanese Black cattle.

中文翻译：

---

日本黑牛的Longissimus thoracis肌肉中矿物质浓度与理化特性之间的关系。

使用44只日本黑公牛的胸部长脊肉（LT）肌肉研究了矿物质浓度之间的关系以及矿物质浓度与肌肉理化特性之间的关系。我们确定了LT肌肉中的水分含量，脂肪含量，肉色，脂肪酸组成和矿物质浓度。镁（Mg），钾（K）和锌（Zn）的浓度与脂肪含量呈负相关，但钠（Na），锰（Mn），铜（Cu）和钼（Mo）的浓度与脂肪含量不相关。Mg，Mn，Fe，Cu和Zn的浓度在很大程度上是矿物质浓度的第一主要成分。因为红色的肌肉比白色的肌肉富含这些矿物质，这些矿物质的变化可能是由于LT肌肉中大量红色纤维引起的。K的含量与水分含量呈正相关，而Na的含量与水分含量却没有关系，这表明细胞内液量可以极大地影响水分含量。本实验的结果表明，矿物质浓度反映了一些特征，例如不仅脂肪含量，而且还反映了日本黑牛LT肌肉中肌纤维类型的组成和细胞内液体积。