Polymer Hydrogels Formulated with Various Cross-Linkers for Food-Surface Application to Control Listeria monocytogenes
(주)코리아스칼라
- 최초 등록일
- 2023.04.05
- 최종 저작일
- 2017.10
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서지정보
ㆍ발행기관 : 한국식품위생안전성학회
ㆍ수록지정보 : 한국식품위생안전성학회지 / 32권 / 5호
ㆍ저자명 : Sejeong Kim, Hyemin Oh, Heeyoung Lee, Soomin Lee, Jimyeong Ha, Jeeyeon Lee, Yukyung Choi, Yohan Yoon
목차
Introduction
Materials and Methods
Preparation of hydrogels
Measurement of hydrogel mechanical properties
Spot assay of antimicrobials
Statistical analysis
Results and Discussion
Acknowledgment
Disclosure Statement
References
영어 초록
This study investigated the physical properties of polymers and antimicrobial activities of organic acids on Listeria monocytogenes to develop hydrogels. κ-carrageenan (1, 2, and 3%), carboxymethylcellulose (CMC; 1, 3, and 5%), and agar (1.5 and 3%) were mixed with cross-linkers (Na+, K+, Ca2+, and Al3+) or each other by stirring or heating to form cross-linkage, and their physical properties (hardness, elasticity, and swelling) were measured. The hydrogels formulated with organic acid (1, 3, and 5%) were analyzed by spot assay against L. monocytogenes. κ-carrageenan formed hydrogels with high hardness without other cross-linkers, but they had low elasticity. The elasticity was improved by mixing with other cross-linkers such as K+ or other polymer, especially in 3% κ-carrageenan. CMC hydrogel was formed by adding cross-linkers Al3+, Na+, or Ca2+, especially in 5% CMC. Thus, stickiness and swelling for selected hydrogel formulations (two of κ-carrageenan hydrogels and three of CMC hydrogels) were measured. Among the selected hydrogels, most of them showed appropriate hardness, but only 3% κ-carrageenan-contained hydrogels maintained their shapes from swelling. Hence, 3% κ-carrageenan+0.2% KCl and 3% κ-carrageenan+1% alginate+0.2% KCl+0.2% CaCl2 were selected to be formulated with lactic acid, and showed antilisterial activity. These results indicate that 3% κ-carrageenan hydrogels formulated with lactic acid can be used to control L. monocytogenes on food surface.
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