바다방석고둥의 동결저장중의 품질의 변화 = Quality Changes of Top Shell, Omphalius Pfeifferi Capenteri During Frozen Storage

다국어 초록 (Multilingual Abstract)

To investigate the physical, chemical. and histological quality changes during frozen Omphalius pfeifferi capenteri, was stored under the temperatures of -18℃, -25℃, and -30℃ immediately after shelling.
The results are as follows :
1. Generally. pH was increased but a little change was observed at -30℃. Amount of free drip was increased with higher frozen temperaure and longer frozen storage period.
2. Water holding capacity was almost as constant at -30% as immediately after frozen, but the longer storage period goes the lower water holding capacity was observed.
3. The extractibility and composition of muscle protein, sarcoplasmic protein and stroma protein were rather stable regardless of frozen temperature and frozen storage period however, extractibility of myofibrillar protein was decreased with higher frozen temperature and longer frozen storage period.
4. On the changes of muscle tissue structure, following points were observed.
1) In the muscle tissue structure of fresh sample, fine muscle fiber was closely distributed all over the tissue regardless of cross and longitudinal section.
2) Immediately after freezing, tiny ice crystals were in extracellular part regardless of different frozen temperature. these were restored satisfactorily into the muscle tissue after thawed.
3) In tissue structure under frozen state, it was observed that ice crystals apparently grew with the higher storage temperature. Empty spaces between muscle bundles which were formed by aggregation of muscle fiber were observed after 3 months storage at -18%.
4) Tissue structure in thawed state was restored satisfactorily after 1 month storage regardless of storage temperature. After 3 months storage at -3O℃. muscle tissue was well restored, but at -18℃, empty spaces were appeared due to imperfected restoration.

목차 (Table of Contents)

• ABSTRACT = 1
• Ⅰ. 서론 = 1
• Ⅱ. 재료 및 방법 = 3
• Ⅲ. 결과 및 고찰 = 5
• 요약 = 10
• <참고문헌> = 14