壳聚糖涂膜对无花果冷藏保鲜效果的研究

Effects of Chitosan-coating on Cold Preservation of Ficus Carica Linn

研究了壳聚糖涂膜法对无花果冷藏保鲜效果的影响,测定了无花果的失重率、多酚氧化酶活性、过氧化物酶活性,以及总酸度、VC含量、蛋白质含量和还原糖含量。结果表明:壳聚糖涂膜处理可有效防止无花果贮存时的失重率的增加;降低多酚氧化酶(PPO)和过氧化物酶(POD)的活性,利于防止无花果的褐变;维持了无花果总酸度、VC含量以及蛋白质含量,降低了还原糖含量,保持了无花果的品质。

Effects of Chitosan-filming on the preservation of Ficus carica Linn had been studied. Weight loss rate, the activity of polyphenol oxidase（PPO）, the activity of peroxydase（POD）, total acidity, the content of vitamin C, the content of protein and the content of reducing sugar have been measured. Results showed that：chitosan-filming could effectively reduce the weight loss ratio. The PPO and POD activities of treated group could be decreased, which could prevent fruit from browning; chitosan-filming could maintain total acidity, the content of vitamin C, the content of protein in cold preserved Ficus carica Linn, and also lower the content of reducing sugar, consequently, keep the quality of Ficus carica Linn.