Dielectric Barrier Discharge High Voltage Cold Atmospheric Plasma: An Innovative Nonthermal Technology for Extending the Shelf‐Life of Asian Sea Bass Slices

Abstract

Impact of dielectric barrier discharge high‐voltage cold atmospheric plasma (DBD‐HVCAP) generated with the mixture of oxygen and argon (10:90) for various treatment times (2.5 to 10 min) on the qualities of Asian sea bass slices during 4 °C storage was investigated. Microbial load of slices treated with DBD‐HVCAP were lower than the control. The efficacy of bacteria reduction by DBD‐HVCAP was dependent on the treatment times (P < 0.05). Total viable bacteria count (TVBC) was more than 6.0 Log CFU/g at day 6 for the control kept in air. Slices treated with DBD‐HVCAP for all treatment times used had TVBC lower than the limit at day 12. Total volatile nitrogen base content (TVNB) as well as trimethylamine (TMA) content in slices treated with DBD‐HVCAP were lower than that of the control throughout the storage. TVNB as well as TMA contents were lower in HVCAP treated slices in a treatment time‐dependent manner. Nevertheless, lipid oxidation in samples treated with DBD‐HVCAP was higher than that of the control. Polyunsaturated fatty acids were decreased in slices treated with DBD‐HVCAP for more than 5 min after 12 days of storage. Therefore DBD‐HVCAP treatment for 5 min was demonstrated to be potential means for increasing the shelf‐life of Asian sea bass slices with minimal negative effect on chemical and sensory properties, in which they could be stored longer than 12 days at 4 °C. Practical Application Microbial inactivation capacity of dielectric barrier discharge high‐voltage cold atmospheric plasma (DBD‐HVCAP) has been documented with limited information on its application in extending the shelf‐life of foods. DBD‐HVCAP was demonstrated as an innovative technology for extending the shelf‐life of Asian sea bass slices, which could be implemented in seafood industries for assuring safety and extending shelf‐life of products. The shelf‐life of the slices treated with DBD‐HVCAP was extended to 12 days of storage at 4 °C as compared to the 6 days of the untreated counterpart.

The impact of chitosan film or chitosan/chitosan–epigallocatechin gallate conjugate composite film on the quality changes of Asian sea bass (Lates calcarifer) slices stored in air or under vacuum packaging

“…The results were correlated with decrease in total lipid contents (data not shown). PUFA possessed with high number of double bound were more vulnerable to oxidation during storage as compared to MUFA (Olatunde et al, 2019). The results were consistent with production of hydroperoxides.…”

Innovative Preservation Methods Improving the Quality and Safety of Fish Products: Beneficial Effects and Limits

“…by applying plasma at 80 kV for 5 min to herring (Clupea harengus). Similarly, plasma treatments reduced SSOs' growth in mackerel fillets [32] and Asian sea bass slices [23,24,26,33]. Some researchers reported an additive effect by using different gas compositions (air, nitrogen, oxygen, argon, etc.)…”

“…Although few studies have analysed this issue in fish products, some authors have observed that 4 min treatments at 60 kV voltage decreased the proteolytic activity (50-64%) in large head hairtail (Trichiurus lepturus) [37] and in Argentine shortfin squid (Argentinus ilex) [38], thus slowing down the degradation of myofibrillar and collagenous proteins responsible of the fish softening and texture worsening. The inhibition of polyphenol oxidase by the application of NTAP in white shrimps was also recovered [39], as well as the inhibition of lipases, proteases and other enzymes [23,24,33,38,40,41]. However, this aspect needs to be further investigated.…”

Effect of High Voltage Cold Plasma on Oxidation, Physiochemical, and Gelling Properties of Myofibrillar Protein Isolate from Asian Sea Bass (Lates calcarifer)

“…A constant distance of 2.0 cm was kept between the electrodes for all trials. In-bag dielectric barrier discharge HVCP (IB-DBD-HVCP) was used for sample treatment [21,22]. The sealed bags containing MPI were positioned between the ground cathode and the quartz.…”