摘要
以壳聚糖和海藻酸钠为保鲜剂,对鲜切铁棍山药进行涂膜保鲜,每隔2d测定失重率、Vc含量、可滴定酸含量、褐变度、可溶性固形物含量、多酚氧化酶活性等指标研究保鲜效果。同时以空白组、壳聚糖涂膜组作为对照。结果表明:壳聚糖浓度为1.2%的单一膜和1.2%壳聚糖、0.2%海藻酸钠复合膜都能有效地抑制鲜切铁棍山药的褐变,降低失重率,减少营养物质的损失。复合膜的保鲜效果最好。
Fresh-cut Dioscorea opposita Thunb.cv.Tiegun were coated with edible film composed of chitosan and sodium alginate.Every two days the weight loss rate,Vc content,titratable acid content,browning,soluble solid content,PPO activity were measured to study the preservation effect.The untreated group and chitosan single coating film group were compared.The results showed that the 1.2% chitosan single coating film and 1.2%-chitosan-0.2%-sodium-alginate composite film could effectively reduce the browning,weight loss rate and nutrient loss.The best preservation effects were achieved by compound coating film.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2011年第6期225-228,共4页
Food and Fermentation Industries
基金
河南农业大学重点学科资助项目(10800210)
关键词
鲜切铁棍山药
壳聚糖
海藻酸钠
复合膜
fresh-cut Dioscorea opposita Thunb.cv.Tiegun
chitosan
sodium alginate
composite film
