Rather than using noble gas, room air is used as the working gas for an atmospheric pressure room-temperature plasma. The plasma is driven by submicrosecond pulsed directed current voltages. Several current spikes appear periodically for each voltage pulse. The first current spike has a peak value of more than 1.5 A with a pulse width of about 10 ns. Emission spectra show that besides excited OH, O, N2(C–B), and N2+(B–X) emission, excited NO, N2(B–A), H, and even N emission are also observed in the plasma, which indicates that the plasma may be more reactive than that generated by other plasma jet devices. Utilizing the room-temperature plasma, preliminary inactivation experiments show that Enterococcus faecalis can be killed with a treatment time of only several seconds.
The aim of this study was to evaluate the mechanism of dielectric barrier discharge cold plasma (DBD‐CP) sterilizing function on milk and to analyze the influences of DBD‐CP on the structure and physicochemical performance of milk. It was verified that DBD‐CP sterilizing function resulted in a broken bacterial cell membrane, reduced activity of metabolic enzymes, and bacterial DNA destruction. DBD‐CP treatment would bring in some more stabilized structures obtained from scanning electron microscopy and Fourier‐transform infrared spectroscopy. The values of color, viscosity, pH, and titratable acidity showed an acceptable physicochemical property with DBD‐CP treatment at 70 V (120 s) and 80 V (120 s). Therefore, it indicated that DBD‐CP could be used as a new sterilization method for milk.
Seafood provides a range of health benefits due to its nutritional and bioactive components. The proteins and peptides from Mytilus edulis have good bone growth promoting activities.
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