板栗贮藏过程中主要营养物质的变化
2019-10-21房贵磊
房贵磊



摘 要:在板栗的贮藏方式中,冷藏和沙藏是两种重要的手段。本文对不同的贮藏期中板栗内蛋白质、还原糖、淀粉以及水分进行测定,结果表明,不同贮藏方式对水分、还原糖、淀粉以及蛋白质变化影响不显著。同时贮藏期内蛋白质与还原糖总体上变化显著,而淀粉与水分总体上并无显著变化。综合考虑,选择冷藏板栗作为后续试验的研究对象,冷藏温度为4 ℃。
关键词:板栗;贮藏;营养物质
Abstract:Refrigeration and sand storage are two important methods in the storage of chestnut. By measuring the protein, reducing sugar, starch and water in the chestnut during different storage periods, it can be seen that the influence of different storage methods on water, reducing sugar, starch and protein changes is not significant. At the same time, the protein and reducing sugars changed significantly during the storage period, while there was no significant change in starch and water. Considering comprehensively, the refrigerator chestnut was selected as the research object of the subsequent test, and the refrigerating temperature was 4 ℃.
Key words:Chestnut; Storage; Nutrients
中图分类号:TS255.3
板栗是干果的一种,不耐贮藏。随着时间的延长,板栗内的营养物质发生变化,而这种变化对板栗产品的加工品质以及感官品质都有重要影响。
1 材料与方法
1.1 材料与试剂
陕南镇安大板栗:栗苞绿色未开裂称七成熟;栗苞绿色微裂称八成熟;栗苞由绿转微黄色顶部微开裂称九成熟;栗苞黄褐色顶部开裂40°角左右称完全成熟,见图1。
纯净水,购自西安万家纯净水服务部;碳酸氢钠、亚硫酸钠、柠檬酸三钠、氢氧化钠,购自西安富力化学厂;柠檬酸、氯化钠、3,5-二硝基水杨酸,购自西安化工试剂厂;葡萄糖,购自天津市科密欧化学试剂开发中心;酒石酸钾钠,购自汕头市光华化学厂;苯酚,购自重庆北培精细化工廠;浓盐酸,购自西安市化玻站化学厂。以上试剂均为分析纯。
1.2 仪器与设备
电热恒温水浴锅(型号:HS.2,上海精密科学仪器有限公司);电热恒温干燥箱(型号:101-2,北京科伟永兴仪器有限公司);格兰仕微波炉(型号:P70D20SP-DF,格兰仕微波炉电器有限公司);光栅分光光度……
