Inhibition of Salmonella typhimurium and Listeria monocytogenes in coconut juice by graphene-doped photocatalyst rGO/TiO 2 .

Autor: Yan R; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China., Wu Q; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China., Lin G; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China., Chen L; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China., Song X; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China., Luo S; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China., Situ W; College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, PR China. Electronic address: situwenbei@scau.edu.cn.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2025 Jan 15; Vol. 463 (Pt 1), pp. 141103. Date of Electronic Publication: 2024 Sep 04.
DOI: 10.1016/j.foodchem.2024.141103
Abstrakt: This research used the photocatalyst rGO/TiO 2 prepared by hydrothermal method to inhibit the growth of these microorganisms in water and coconut juice. In coconut juice, the initial count of Salmonella typhimurium decreased from 3 × 10 5  CFU /mL to 6.3 × 10 4  CFU /mL, and the initial count of L. monocytogenes was reduced from 3 × 10 5  CFU/mL to 1.2 × 10 5  CFU/mL. Moreover, the chemical structure characterization rGO/TiO 2 showed that the doping of rGO formed a compact composite, enhanced the transfer of photogenerated electrons, and improved the photocatalytic efficiency of TiO 2 . The active substances ·OH and ·O 2 - produced by photocatalysis directly destroyed the integrity of bacteria cells, led to leakage of protein and DNA in the cells, and resulted in inactivation of the microorganisms, although Salmonella typhimurium and Listeria monocytogenes have different cell structures. These results would provide a good candidate photocatalyst to resist Salmonella typhimurium and Listeria monocytogenes and promote the development of photocatalysis applications.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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