生物可食膜的特性及其对嘎啦苹果采后贮藏的影响  

Properties of Biological Edible Membrane and Its Effect on the Postharvest Storage of Gala Apples

作　　者：何晓霞[1] 徐莹[1] 李晓东[1,2] 樊燕[1] 姜维[1] 汪东风[1] 

机构地区：[1]中国海洋大学食品科学与工程学院 [2]青岛市果茶花卉工作站,山东青岛266071

出　　处：《食品与发酵工业》2010年第4期201-206,共6页Food and Fermentation Industries

基　　金：山东省攻关项目(2007GG10009005);"十一五"国家科技支撑计划重大项目(2008BAD94B00)

摘　　要：用罗伦隐球酵母(Cryptococcus laurentii)和海藻酸钠等可食性材料,制备一种生物可食膜,研究了该膜的厚度、机械强度、水蒸气透过率以及透氧率等性能,并以嘎啦苹果为材料,用该膜液浸涂后贮藏。结果表明:膜液处理组可显著降低失重率,提高果皮彩度,延缓硬度和VC的下降及丙二醛的上升,保持较高的可溶性固形物、总糖和可滴定酸含量,并有效抑制霉菌生长,提高苹果的感官可接受度,其保鲜效果明显优于对照组。含有罗伦隐球酵母的海藻酸钠生物可食膜有助于提高苹果采后贮藏的品质。The biological edible membrane is made by sodium alginate, Cryptococcus laurentii and other edible materials. Its properties ,such as thickness, mechanical strength, water vapor transmission, oxygen permeability were studied. Then Gala apples dipped with the biological edible coating liquid. The result showed that the coating significantly decreased the weight loss, enhanced the fresh color of the apples, delayed the decline of hardness and vitamin C and the increased of malondialdehyde. The treated apples also maintained relatively high soluble solids, total sugar and titratable acidity. Further more, it inhibited the growing of Streptomyces and improved the sensory evaluation. Its preservative effect was obviously superior to the control group. Therefore, the study indicates that the biological edible sodium alginate coating containing Cryptococcus laurentii can improve the quality of postharvest storage of Gala apples.

关 键 词：罗伦隐球酵母 海藻酸钠 可食膜 保鲜 嘎啦苹果 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]