纳他霉素复合涂膜处理对红地球葡萄的防腐保鲜效果(英文)

研究在冷藏条件下纳他霉素复合涂膜处理对葡萄的防腐保鲜效果。以"红地球"葡萄为试材,将质量分数1%壳聚糖分别与质量分数0.2%、0.4%、0.6%纳他霉素复合涂膜处理果实(分别记为T1、T2、T3),以用蒸馏水处理和仅用质量分数1%壳聚糖涂膜处理的果实作为对照(分别记做CK1、CK2),比较处理果和对照果的腐烂率、落粒率、质量损失率及呼吸强度和果实相关生理品质的影响。结果表明,CK1的呼吸强度、质量损失率、腐烂率和落粒率均高于CK2,但处理组T1、T2、T3果实的上述指标均低于CK1、CK2,且与对照相比果粒硬度维持在较高的水平。同时处理组T1、T2、T3的果实维生素C、可滴定酸质量分数较CK1、CK2果实下降缓慢,但对可溶性固形物质量分数没有显著影响。纳他霉素复合涂膜处理对红地球葡萄具有良好的保鲜效果,能显著延长果实贮藏时间。综合考虑,质量分数0.4%的纳他霉素壳聚糖复合涂膜处理对葡萄果实的保鲜效果最佳。

Antisepsis and Fresh-keeping Effects of Natamycin Coating Compounds Treatment on Red Global Grape

The aim was to research fresh-keeping effects of natamycin on cold-preserved grape.Red globe grapes were processed with compound coating liquid of chitosan with mass fraction at 1% and natamycin with mass fractions at 0.20% (T1),0.40% (T2) and 0.60% (T3),respectively.Grapes processed with water (CK1) and 1% chitosan (CK2) were taken as control groups.Rotten rate,seed shattering rate,mass loss rate,respiratory intensity and related physiological quality in test and control groups were compared.The results indicated that respiratory intensity,mass loss rate,rotten rate and seed shattering rate in CK1 were all higher than those in CK2.In addition,T1,T2 and T3 were lower in the indices than CK1 and CK2,but still kept at a high level in fruit hardness.Furthermore,mass fractions of Vc and titratable acid declined more slowly in T1,T2 and T3,compared with CK1 and CK2.Natamycin better preserved grapes and prolonged storage period.In general,natamycin with mass fraction at 0.4% proved best in fresh-keeping.