菠萝果皮中原花青素含量是果肉的5倍，总酚含量高约50%，叶绿素主要存在于果皮中，这些物质是引起带皮榨汁法比去皮榨汁法产品褐变严重的主要原因。
Proanthocyanidin content in pineapple peel was about 5 times to fruit pulp, and the total phenol content was approximately 50% higher, chlorophyll mainly exists in peels.
在果蔬加工中防止酶促褐变是一个很重要的问题，直接关系到产品的质量。
It was an very important problem in vegetable and fruit processing to prevent products Browning by enzyme.
在脱水黄花菜加工过程中，非酶促褐变是影响产品质量的关键因素之一。
Nonenzymatic Browning is one of the key factors which influence product quality during processing of dehydrated daylily.
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