壳聚糖及其与纳米siox复合涂膜对莲藕贮藏品质的影响.pdfVIP

第30 卷第4 期 食 品 与生 物 技 术学 报 Vol. 30 No.4 2011 年7 月 Journal of Food Scienceand Biotechnology Jul. 2011 : 1673- 1689( 2011) 04-0518-05 壳聚糖及其与纳米SiOx 复合涂膜 对莲藕贮藏品质的影响 * 罗海莉, 王清章 , 严守雷, 李 洁 ( 华中农业大学食品科技学院, 湖北武汉430070) : 配制了壳聚糖壳聚糖/ 纳米SiOx 和壳聚糖/ 纳米SiOx / 氯化 锡3种涂膜液, 对莲藕进行 了涂膜, 以不涂膜莲藕为对照, 置于0~ 10 贮藏, 通过测定失重率呼吸强度L 值PPO 活性可 溶性糖质量分数及硬度, 研究了壳聚糖及其复合膜对莲藕贮藏保鲜过程中品质的影响结果表 x 明: 壳聚糖/ 纳米SiO 组效果最好, 有效地抑制了莲藕采后呼吸失重糖物质消耗PPO 活性升高 颜色变暗及硬度下降, 而壳聚糖/ 纳米SiOx 膜中添加氯化 锡并不能对莲藕保鲜效果起到更好的 作用 : 莲藕; 壳聚糖; 纳米SiOx ; 氯化亚锡; 膜保鲜 : S 645. 1 : A Effect of Chitosan and Chitosan-based Coatings on the Storage Quality of Lotus Rhizones * LU O Ha-i li, WA NG Qi g-zha g , YAN Shou-lei, LI Jie ( School of Food Scie ce a d Tech ology , H uazho g Agricult ural U iversity , Wuha 430070, Chi a) Abstract:I this study, three coati g solutio s w ere prepared a d its effect o the refrigerated lotus rhizo es quality w as i vestigated. The formulatio s w ere based o chitosa alo e, a d i combi atio w ith a o-SiOx , a d a o-SiOx a d S Cl2 , a d w ith the u coated sample as a co trol. A ll products w ere stored at 0- 10 a d the quality parameters such as w eight loss, respiratio rate, L-value, PPO activity , soluble sugar co te t, reduci g sugar co te t, firm ess a d preservatio i dex w ere evaluated. The results show ed that the coati g of chitosa i combi atio w ith a o-SiOx w as the most effective i keepi g the quality of lotus