Research progress of edible packing films based on fruit and vegetable
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摘要: 目的:为了研究双酶复合酶解大豆分离蛋白制备大豆肽的相对分子量分布及活性片段对实验性高血压大鼠的降压效果。方法:通过单因素实验优选,采取正交实验优化复合酶的酶解工艺,以酶解液对血管紧张素转换酶(ACE)抑制率为指标优选最佳工艺;通过超滤、纳滤后得到最佳分子量片段,应用左硝基精氨酸(L-NNA)诱导大鼠高血压模型,分别给予不同剂量的活性片段进行实验。结果:双酶复合酶解的最佳条件为:在料液比为1:20 g/mL的情况下,酶解温度50℃,酶底比3.0%,酶解pH7.0条件下先用菠萝蛋白酶酶解2 h后,再以酶底比4.0%加入胰蛋白酶,控制温度为40℃、酶解pH为8.0条件下酶解4 h,大豆分离蛋白的水解度35.31%。经过高效液相对酶解液的相对分子量分布得出,大豆分离蛋白原液含有的蛋白质及多肽的相对分子质量主要区间在5000~1.0×105 Da,在双酶复合酶解下,酶解液的蛋白质及多肽的相对分子质量主要区间均在500~4000 Da;通过超滤得出最佳活性片段为1000~3000 Da,药理实验表明,与模型对照组相比各组血压均有降低,且大豆肽剂量组有显著性差异(p<0.05);其中大豆肽高剂量组和卡托普利组相当。结论:双酶复合酶解制备的大豆肽相对分子量较小,活性片段对高血压大鼠模型降压作用显著。Abstract: This paper reviewed the research status of edible packing films based on fruit and vegetable(fruit-vegetable films)from the aspects of raw material formula, performance index and packaging application. In addition, the existing problems and development prospects of fruit-vegetable films were also outlined in order to provide the theoretical and experimental foundation for their edible packaging application.
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Keywords:
- edible film /
- fruit-vegetable film /
- mechanical properties /
- barrier properties
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