文章基本信息

标题：Characterization, Antimicrobial Properties and Coatings Application of Gellan Gum Oxidized with Hydrogen Peroxide
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作者：Yushuang Lu ; Xiaojian Zhao ; Sheng Fang 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2019
卷号：8
期号：1
页码：31-42
DOI：10.3390/foods8010031
出版社：MDPI Publishing
摘要：The effect of hydrogen peroxide (H2O2) oxidation on the physicochemical, gelation and antimicrobial properties of gellan gum was studied. The oxidized gellan gum (OGG) was characterized by measuring the carboxyl/carbonyl group contents, Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H-NMR) spectroscopy. The H2O2 oxidation resulted in a large increase in the carboxyl groups in gellan gum. The OGG lost gelation ability by oxidation even in the presence of metal ions. The antimicrobial activities of the OGG against Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Escherichia coli), and fungal (Aspergillus niger) were tested. The OGG could inhibit the growth of both bacteria and fungal, and the activity was improved with an increase in the oxidation level. Finally, the application of the OGG as an active coatings material to extend the storage of apples was tested.
关键词：oxidation; gellan gum; spectroscopy; gelation; antimicrobial oxidation ; gellan gum ; spectroscopy ; gelation ; antimicrobial