Atmospheric cold plasma (ACP) is a novel non-thermal technique that provides the ability to denaturate enzymes without damaging main components. The first purpose of this research is to evaluate the impact of ACP produced via dielectric barrier discharge (DBD) on endogenous enzymatic activity and tilapia quality characteristics.How to cite this article: Mohamed EE, Younis ER, Mohamed EA. Impact of atmospheric cold plasma (ACP) on maintaining bolti fish (Tilapia nilotica) freshness and quality criteria during cold storing.

This work focuses on extraction of biological compounds from red onion peels and its microencapsulation using maltodextrin (MD), soybean protein isolate, and a complex of soybean protein isolate (SPI) and maltodextrin by freeze drying manner. Furthermore, there was a quality evaluation for cake integrated with microencapsulated polyphenols as well as polyphenols stability assessment after baking. Extracts of red onion peel were produced by three methanol concentrations (50, 75, or 100% v/v). A 75% methanolic red onion peel extract (75M) yielded a high total phenolic content, total flavonoid, and antioxidant activity using β‐carotene bleaching and 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) radical scavenging. (SPI + MD) encapsulates had higher encapsulation efficiency (94.30 ± 1.50%). Cake integrated with microcapsules had improved qualitative properties and increased polyphenol content more than other integrated with extract because of encapsulation protective effect pending baking. Comparatively, cake contained SPI microencapsulates showed higher specific volume, moisture absorption, texture, acceptable color, sensory evaluation, and concentration of polyphenols. Practical applications Onion peels are one of the most important onions processing by‐products. The onion peel has a high biological compounds content such as quercetin, phenolics compound, and flavonols. As onion peels extract nature is extremely hygroscopic and sensitive for thermal, it is hard to add them to foodstuffs. The higher polyphenols content of encapsulating incorporated cake were enough to claim for the functionality of polyphenols in the cake. The higher polyphenols content of encapsulating incorporated cake were enough for claiming polyphenols functionality into the cake. (SPI + MD) microcapsules contained high concentrations of red onion peels polyphenols within freeze drying or baking process. Freeze drying is a sufficient technique for add polyphenols into the foodstuffs.

The processing of faba beans generates great quantities of hulls, which are high in bioactive compounds with demonstrated radical-inhibiting properties. There is no research on the impact of using faba bean hull nanoparticles (FBH-NPs) to improve the quality and extend the shelf-life of beef products. Hence, the target of this investigation was to assess the inhibiting influence of adding FBH-NPs at two different concentrations (1 and 1.5%) on the physical attributes, lipid and protein oxidation, colour degradation, and microbiological safety of burgers during refrigerated storage (4 ± 1 °C/12 days). The FBH-NPs presented great phenolic content (103.14 ± 0.98 mg GAE/g dw) and antioxidant potential. The water holding capacity and cooking properties in burgers including FBH-NPs were improved during storage. The FBH-NPs significantly (p < 0.05) decreased the reduction rate of redness and lightness during the burger refrigerated storage and the FBH-NPs were more beneficial in preventing cold burger discolouration. In the FBH-NPs-treated burgers, peroxide values, TBARS, and protein carbonyl content were lower than in the control (up to 12 days). The microbiological load of burgers including FBH-NPs was lower than the load of the control during refrigerated storage. The findings revealed that FBH-NPs were more efficient in enhancing the cooking characteristics, retarding lipid or protein oxidation, preventing colour detrition and improving the microbial safety of burgers.

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Integrating the consumption of agro-industrial residues with satisfactory consumers is an opposition that, may affect the financial dividend of the frozen meat manufacturing, aside from producing products with diversified nutritional values and satisfying technical characteristics. Thence, we aimed in this research to elaborate and appraise the physicochemical and microbiological characteristics of beef hamburger with the addendum 2 and 4 % of red grape pomace powder (RGPP) throughout its stockpiling at (-18 ± 2°C) over a period 12 weeks. A significant influence on pH value was observed at the beginning (zero time), however the control sample, 2% and 4% had pH values of 6.68, 6.41 and 6.22, respectively. Meantime, there was a significant influence of (RGPP) on thiobarbituric acid (TBA) evidenced on 4th week. The results showed that the microbial growth increased as a function to storage period for all and the addendum of RGPP in beef burger caused a reduction in total bacterial count in comparison with control. Thus, in general, it can be concluded that addendum of RGPP is an efficacious mean to improve burger quality and increasing its storage stability.