Characterization of zinc oxide nanoparticles-epoxy resin composite and its antibacterial effects on spoilage bacteria derived from silvery pomfret (Pampus argenteus)

Publication date: December 2019Source: Food Packaging and Shelf Life, Volume 22Author(s): Jiahao Xu, Ru Song, Yubin Dai, Shuyi Yang, Jie Li, Rongbian WeiAbstractEpoxy resin was conjugated with zinc oxide nanoparticles (ZnO NPs) to prepare antibacterial zinc oxide-epoxy resin (ZnO-ER) composite. The property of ZnO-ER was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and SEM-energy dispersive X-ray spectroscopy (SEM-EDS) assays. Results showed the presence of ZnO NPs on the surface and cross-sections of ZnO-ER composite. The average thickness of ZnO-ER was 392.38 μm. The strong antibacterial effect of ZnO-ER on the test bacterial mixture derived from spoiled silvery pomfret (Pampus argenteus) was observed using SEM assay. After addition of ZnO-ER for 6 h in the bacterial mixture, cellular membrane integrities of most bacteria were destroyed. High-throughput 16S ribosomal RNA gene sequencing revealed the decreases of both community richness and diversity in the ZnO-ER treated bacterial mixture. As for relative abundances, significant decreases were detected in the phyla Bacteroidetes and Firmicute, while dramatic increase of the phylum Proteobacteria was observed after ZnO-ER treatment. The family of Enterobacteriaceae was predominant in the ZnO-ER treatment. The genera of Providencia and Yersinia showed dramatically high relative abundances. However, the abundances of some specific genera such as Aeromonas and Shewanell, which are related...
Source: Food Packaging and Shelf Life - Category: Food Science Source Type: research

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Abstract Acute diarrhea is an important public health issue. Here, we focused on the differences of enteropathogens in acute diarrhea between urban and rural areas in southeast China. Laboratory- and sentinel-based surveillance of acute diarrhea (≥ 3 loose or liquid stools/24 hours) was conducted at 16 hospitals. Fecal specimens were tested for bacterial (Aeromonas sp., Campylobacter sp., diarrheagenic Escherichia coli, Plesiomonas shigelloides, non-typhoidal Salmonella, Shigella sp., Vibrio sp., and Yersinia sp.) and viral (adenovirus, astrovirus, Norovirus, Rotavirus, and Sapovirus) pathogens. Descriptive sta...
Source: Am J Trop Med Hyg - Category: Infectious Diseases Authors: Tags: Am J Trop Med Hyg Source Type: research
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Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
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Source: Fish and Shellfish Immunology - Category: Biology Source Type: research
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Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
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Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
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