自然科学版
陕西师范大学学报(自然科学版)
食品工程与营养科学
微波处理对苹果汁质量指标的影响
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刘喜娟1,崔凤2,杨章民1*,肖旭霖3
(1 陕西师范大学 生命科学学院, 陕西 西安 710062; 2 西安市产品质量监督检验所, 陕西 西安 710065; 3 陕西师范大学 食品工程与营养科学学院, 陕西 西安 710062)
刘喜娟,女,硕士研究生,研究方向为生物化学与分子生物学.
摘要:
研究了不同条件微波处理对苹果汁主要质量指标的影响.结果表明,随着微波处理功率的增大(245、350、560、875 W)及持续时间的加长(50、70、90、110 s),苹果汁总酸度从014%提高到016%,可溶性固形物含量由105度增高到425度.相反, 澄清度从954%下降到270%,菌落总数从31×105下降为零.
关键词:
微波处理; 苹果汁; 质量指标
收稿日期:
2007-09-22
中图分类号:
TS255.44
文献标识码:
A
文章编号:
1672-4291(2008)05-0098-03
基金项目:
Doi:
Influence of microwave treatment on the quality index of the apple juice
LIU Xi-juan1, CUI Feng2, YANG Zhang-min1*, XIAO Xu-lin3
(1 College of Life Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China; 2 Xi′an Product Quality Supervision Inspection Institute, Xi′an 710065,Shaanxi, China; 3 College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
The influence of microwave treatment on principal quality index of the apple juice is investigated under different conditions. The results show that with the increase of microwave power (245,350,560,875 W) and prolongation of treatment time (50,70,90,110 s), the total acidity of the apple juice rises from 014% to 016%, the soluble solid content grows steadily from 105 degree to 425 degree. On the contrary, the clarified degree of the apple juice is reduced markedly from 954% to 270% and the total amount of colony is declined from 31×105 to zero.
KeyWords:
microwave-treatment; apple juice; quality index