【摘要】 为研究不同超声功率辅助浸渍解冻对藏羊肉品质的影响，采用超声功率分别为200,300,400,500 W(U1,U2,U3,U4)进行解冻，以0为对照组（C），以藏羊肉的中心温度达到4℃为完全解冻，分析其食用品质、脂质氧化及肌原纤维蛋白氧化等变化情况。结果表明，超声辅助解冻藏羊肉既能缩短解冻时间，又较好地保持其品质。在不同超声解冻组中，以超声功率300 W解冻处理组效果最好，解冻时间比对照组缩短了15 min，脂质氧化指标中过氧化值、硫代巴比妥酸值比对照组分别低0.011 mg/100 g,0.010 mg/kg，蛋白氧化指标中蛋白浊度和羰基含量比对照组低0.105 mg/m L,0.947 nmol/mg，总巯基含量比对照组高1.187 nmol/g。藏羊肉的过氧化值与肌原纤维蛋白浊度和羰基含量均呈高度正相关。超声功率300 W解冻处理组显著抑制了藏羊肉中脂质氧化和蛋白氧化程度（p<0.05），有效减少汁液流失，维持肌肉组织的持水性与感官特性。超声解冻是一种高效、低损耗的藏羊肉解冻方式，可为藏羊肉的工业化加工提供技术支撑。更多还原

【Abstract】 In order to explore the effect of different ultrasonic power levels 200,300,400,500 W(U1,U2,U3,U4) on the quality with 0 as control,Tibetan mutton during ultrasound-assisted thawing. The meat quality indices were determined when the core temperature of Tibetan mutton reached 4 ℃. Analyses were performed on changes in edible quality,lipid oxidation,and myofibrillar protein oxidation. The results demonstrated that ultrasound-assisted thawing not only reduced the thawing time but also decreased the oxidation degree of Tibetan sheep,with better quality preservation being achieved. Among the different ultrasonic treatment groups,the 300 W power setting was found to be most effective,showing a 15 min reduction in thawing time compared to the control group. The peroxide value and thiobarbituric acid value in liquid oxidation index were0.011 mg/100 g and 0.010 mg/kg lower than those in the control group. The protein turbidity and carbonyl content in protein oxidation indices were determined to be 0.105 mg/m L and 0.947 nmol/mg lower than the control values. The total sulfhydryl content was 1.187 nmol/g higher than that in the control group. Significant positive correlations were observed between peroxide value and both myofibrillar protein turbidity and carbonyl content. The 300 W treatment significantly inhibited lipid and protein oxidation(p<0.05),effectively reduced drip loss,and maintained water-holding capacity and sensory characteristics. These findings indicated that ultrasound-assisted thawing serves as an efficient, low-loss method for Tibetan mutton processing,providing valuable technical support for industrial applications.更多还原