貝類の冷凍に関する研究-III

-アカガイ肉の冷結貯蔵中における微細構造の変化-

抄録

Changes in the morphology of ark shell, Anadara broughtonii (Shrenk) foot muscle occurring during three months storage at -10°C and -40°C were examined by electron microscopy. Previous light microscopic study showed that muscle fibers of ark shell muscle, being a king of smooth muscle, were tightly and finely arranged but orientated randomly and every muscle fiber exhibits wavines.
By electron microscopy, it was observed that thick filaments were also orientated randomly and wavy within the muscle fibers. 1n the thawed muscle tissue, especially in the tissue which had been stored at -10°C for three months, empty spaces were observed in and outside the muscle fibers. The thick filaments became more compact and they seemed to be aggregated to some extent. No morphological changes were observed in the thick filaments of the thawed muscle tissue which were stored at -40°C for the same period.