Freezing is one of the most widely practiced, effective and efficient methods for food preservation. Freezing has been extensively used in the meat industry, as it can maintain a reasonably acceptable level of meat quality for months and even years. The freezing process has substantial impacts on the quality attributes of the frozen/thawed meat products. In particular, the rate of freezing plays a crucial role in determining the size and location (or distribution) of ice crystals within the frozen meat tissue, which subsequently influences the quality of the frozen/thawed meat. It has been generally agreed that slow freezing rates cause the formation of extracellular/large ice crystals within muscle resulting in considerable damage in muscle proteins and cell membranes, consequently diminishing meat quality characteristics (particularly showing unacceptably high moisture loss as purge and/or drip). Conversely, fast freezing results in the formation of numerous fine ice crystals, which are uniformly distributed mostly at intracellular levels within muscle. Thus, the extent of quality deterioration caused by freezing is relatively less for the fast frozen meat compared to the slow frozen counterpart.
Freezing is one of the most widely practiced, effective and efficient methods for food preservation. Freezing has been extensively used in the meat industry, as it can maintain a reasonably acceptable level of meat quality for months and even years. The freezing process has substantial impacts on the quality attributes of the frozen/thawed meat products. In particular, the rate of freezing plays a crucial role in determining the size and location (or distribution) of ice crystals within the frozen meat tissue, which subsequently influences the quality of the frozen/thawed meat. It has been generally agreed that slow freezing rates cause the formation of extracellular/large ice crystals within muscle resulting in considerable damage in muscle proteins and cell membranes, consequently diminishing meat quality characteristics (particularly showing unacceptably high moisture loss as purge and/or drip). Conversely, fast freezing results in the formation of numerous fine ice crystals, which are uniformly distributed mostly at intracellular levels within muscle. Thus, the extent of quality deterioration caused by freezing is relatively less for the fast frozen meat compared to the slow frozen counterpart.
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