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高压静电解冻对冻罗非鱼片品质的影响
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摘要
本文以冻罗非鱼片为研究对象,实验研究了其在高压静电场中解冻的过程。通过不同电场强度1.8kv、3.8kv和无电场条件下分别在温度为25℃、15℃和5℃温度条件下解冻,研究其解冻曲线的变化、解冻时间和解冻速率;通过测定解冻损失率、菌落总数、感官品质、色差值、总挥发性盐基氮(TVB-N)、脂质氧化(TBA)等指标的变化情况,分析高压静电场解冻对罗非鱼肉品质指标的变化。结果表明,高压静电场解冻时间短,解冻速率快,且温度越低,解冻时间越长,高压静电场解冻的优势越明显。高压静电场条解冻解冻损失率低,感官品质更好;TVB-N值、TBA值和菌落总数都低于无电场组。
The effect of HVEF on the thawing process of the frozen tilapia fillet is studied in this paper. The experimental frozen tilapia fillet were thawed under different electric field strength of3.8 kv, 1.8 kv and no electric field under the condition of the temperature is 25℃, 15℃and 5℃,study the thaw the shape of the curve, the thawing time and thawing rate; By measuring loss rate of thawing, colony, sensory quality, total color difference value, total volatile base(TVB- N),lipid oxidation of nitrogen(TBA), and other indicators of change, analysis of high voltage electrostatic field to thaw for tilapia meat quality index changes. The results showed that thawing under HVEF significantly improves thawing rate of the frozen tilapia fillet, and the lower the temperature, the longer the thawing time, the more obvious the thawing effect of the high voltage electrostatic field. HVEF of defrost loss rate is low, quality is better; TVB- N value, associates,and the total number of colonies are lower than without electric group.
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