Effects of freezing and thawing cycles on the quality of Nile tilapia fillets

Abstract The aim of this investigation was to evaluate the impact of multiple freezing and thawing cycles on the physicochemical properties of Nile tilapia fillets. For this purpose, 72 fresh Nile tilapia fillets were packed and stored in a freezer at -18 °C. The frozen samples were submitted to five freeze-thaw cycles; in each cycle, the freezer was switched off during 14 hours. The consecutive freeze-thaw cycles resulted in a fillet’s total weight loss of 9.48%, with a quadratic regression (P

摘要 本研究旨在评估多次冻融循环对尼罗罗非鱼鱼片理化特性的影响。为此，本研究选取72份新鲜尼罗罗非鱼鱼片进行包装，并置于-18℃的冰柜中储存。将上述冷冻样品进行五次冻融循环处理；每一轮循环中，冰柜关停时长为14小时。连续实施的冻融循环导致鱼片总失重达9.48%，并呈现二次回归（P