Antimicrobial activity of buckwheat starch films containing zinc oxide nanoparticles against Listeria monocytogenes on mushrooms

Abstract

Summary Buckwheat starch (BS) films containing zinc oxide nanoparticles (ZnO‐N; 0%, 1.5%, 3% and 4.5%) were prepared, and their physical, optical and antimicrobial properties were examined. As ZnO‐N content increased from 0% to 4.5%, TS increased from 14.99 to 19.09 MPa and E decreased from 25.60% to 20.65%. In addition, L* and a* values decreased, whereas b*, ΔE and opacity increased. Regarding antimicrobial activity, the BS/ZnO‐N films had the reductions of 2.96–3.74 log CFU mL−1 against Listeria monocytogenes after 8 h based on viable cell count assay. The BS film containing 3% ZnO‐N, an optimal concentration chosen in this study, was applied to fresh‐cut mushroom packaging, and the film exhibited antimicrobial activity against L. monocytogenes, resulting in a reduction of 0.86 log CFU g−1 after 6 days of storage. Thus, these results indicate that the BS/ZnO‐N film can be used as a biodegradable packaging material.

Effect of roasted buckwheat flour and hull enrichment on the sensory qualities, acceptance and safety of innovative mixed rye/wheat and wheat bakery products

“…The results of this study confirm the earlier reports of Čabarkapa et al (), who found that buckwheat hull extract could be used for food preservation. Kim and Song () showed that buckwheat starch films containing 3% zinc oxide nanoparticles could be used as a food packaging material. These authors found that buckwheat films exhibited antimicrobial activity against Listeria monocytogenes and maintained the quality of fresh cut mushrooms during storage.…”

“…The results of this study confirm the earlier reports of Čabarkapa et al (2008), who found that buckwheat hull extract could be used for food preservation. Kim and Song (2018) showed that buckwheat starch films containing 3% zinc oxide nanoparticles could be used as a food packaging material.…”

(Bio)Nanotechnology in Food Science—Food Packaging

“…Active packaging film with Ag-Cu nanoparticles and 50% CEO showed maximum antibacterial action over 21 days when the samples were stored in the refrigerator [ 77 ]. Buckwheat starch (BS) films containing ZnO nanoparticles showed very good antimicrobial activity, when the concentration of ZnO nanoparticles was 3%, since the obtained film for fresh-cut mushroom packaging demonstrated antimicrobial activity against L. monocytogenes , since the reduction of 0.86 log CFU/g after 6 days of storage was detected [ 78 ]. Maximum CFU reductions of 96% and 64.1% on E. coli growth were obtained using 50/50 ratio of TiO 2 /ZnO nanoparticles-coated low-density polyethylene (LDPE) films at the presence of UV light for film alone and fresh calf minced meat packed, respectively [ 79 ].…”

Antibacterial, Antioxidation, UV-Blocking, and Biodegradable Soy Protein Isolate Food Packaging Film with Mangosteen Peel Extract and ZnO Nanoparticles

“…The conversion of phenol to quinone induced substantial aggregation in the film matrix through non-disulfide bonds, thus controlling the roughness of the film [28]. SEM images of SPI/MPE/ZnO films showed that the higher the concentration of ZnO NPs, the smoother the cross-section structure of the film, and the more uniform the distribution of ZnO NPs in the film matrix [46]. The EDX analysis confirmed the presence of ZnO NPs in the composite films (Figure S4).…”