冷激结合壳聚糖涂膜处理对黄瓜低温保鲜的效果

Fresh-keeping effects on cucumber in low temperature with cold shock treatment and film-coating with chitosan

以0℃的冰水混合物为冷激介质,对新鲜黄瓜分别进行20、40、60min的冷激处理,然后用1.5%壳聚糖溶液进行涂膜处理,8℃条件下冷藏贮存,冷藏期间对黄瓜进行呼吸强度、可滴定酸含量、叶绿素含量、丙二醛、硬度、失重率、冷害指数等一系列指标进行测定,结果表明,冷激40min后再用1.5%壳聚糖溶液涂膜处理对黄瓜在低温条件下保鲜效果良好。

0℃ mixture of ice and water used as cold shock medium,1.5% chitosan solution used as the film- coating agent,the fresh-keeping effects on cucumber in low temperature were studied. The cold shock treatment was controlled for 20,40 and 60min,then these cucumbers were put in the refrigerator at 8℃. in the storage time,the respiration intensity,contents of titration acid,chlorophyll and MDA were tested,and the hardness ,weight loss, chilling injury index of the cucumber were analyzed. Results showed that the treatment of cold-shocking 40min ＋1.5% chitosan film had the good effects on fresh-keeping on cucumber at low tern peratu re.