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亚临界水对柑橘果胶流变学特性和分子质量的影响

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成果类型:
期刊论文
论文标题(英文):
The Effect of Subcritical Water on Rheological Properties and Molecular Weight of Citrus Pectin
作者:
陈剑兵;夏其乐;曹艳;谭兴和
通讯作者:
Tan, Xinghe(xinghetan@163.com)
作者机构:
[陈剑兵; 谭兴和] College of Food Science and Technology, Hunan Agricultural University, Changsha
410128, China
[夏其乐; 曹艳] Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou
310021, China
[陈剑兵] 410128, China <&wdkj&> Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou
通讯机构:
College of Food Science and Technology, Hunan Agricultural University, Changsha, China
语种:
中文
关键词:
柑橘果胶;亚临界水;分子质量;流变
关键词(英文):
Degradation;High pressure effects;Macromolecules;Molecular weight;Rheology;Thermal processing (foods);Apparent viscosity;Citrus pectin;Degradation degree;High temperature and high pressure;Macromolecular structures;Pseudoplastic fluid;Rheological property;Sub-critical water;Water treatment
期刊:
中国食品学报
ISSN:
1009-7848
年:
2019
卷:
19
期:
12
页码:
53-59
基金类别:
国家自然科学基金项目(31501438);
机构署名:
本校为第一且通讯机构
院系归属:
食品科学技术学院
摘要:
为了探究食品加工中的亚临界水对柑橘果胶的作用规律,本文研究不同温度处理后果胶流变学特性和分子质量的变化。研究发现随着亚临界水温度的升高和处理时间的延长,果胶溶液从假塑性流体逐渐变为胀塑性流体,表观黏度逐渐下降;柑橘果胶分子质量逐渐减小,数均分子质量最低达23.7 ku,重均分子质量最低达44.5 ku,果胶降解度分别可达80.5%和71.7%;果胶溶液中还原糖的含量逐渐增高,总糖水解度可达75.1%。此外,在特定温度下,果胶大分子的降解速率不随时间的变化而变化。这些发现说明食品加工用的高温高压杀菌产生的亚临界水对柑橘果胶大分子结构具有较大的影响,值得开展深入研究。
摘要(英文):
To explore the effect of subcritical water on citrus pectin, rheological properties and molecular weight of pectin treated by subcritical water under different temperature were studied in this paper. It was found that with the increase of subcritical water temperature and treatment time, pectin solution changed from pseudoplastic fluid to dilatant fluid, and the apparent viscosity decreased gradually. The molecular weight of citrus pectin decreased gradually, with the minimum molecular weight of 23.7 ku for number-average and 44.5 ku for weight...

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