香蕉汁加工过程中褐变原因初探

探讨了香蕉汁加工过程中造成果汁色泽变化的原因。结果发现,香蕉中多酚氧化酶热稳定性高,不易失活,是造成热烫不充分、香蕉汁褐变的主要因素。当热烫充分时,酚类化合物氧化聚合是杀菌前香蕉汁褐变的主要原因,而杀菌时的色泽变化主要是糖类焦糖化反应的结果。

The paper discusses causes of banana juice browning in processing .The results showed that polyphenoloxidase(PPO)was thermal stable and caused the enzymatic browning of inadequately blanched banana juice.After PPO being destroyed,oxidation and condensation of polyphenols were the causes of banana juice browning before juice was sterilized,while caramelization of sug ar played an important role in browning during sterilization.