[20p-A33-1~13] 8.4 Plasma life sciences

4:45 PM - 5:00 PM JST(7:45 AM - 8:00 AM UTC)

[20p-A33-13] Effects of Atmospheric-Pressure Low-Temperature Air Plasma Jet Irradiation on Polyphenol Content in Onions

〇Akira Taniuchi¹, kawakami retsuo¹, mukai rie² (1.Tokushima univ., 2.Bio,TokushimaUniv.)

Keywords:

Plasma,onion,polyphenol

Functional foods with high levels of bioactive compounds are gaining attention for their role in preventive medicine. We focused on onions, which are rich in polyphenols, and discovered that local irradiation of onions with an atmospheric pressure low-temperature air plasma jet for 30 minutes followed by storage for three days resulted in an increase in the polyphenol content of each bulb layer [1]. We hypothesize that the increase is due to the long-lived NO3− generated by the air plasma, though the detailed mechanism of polyphenol enhancement remains unclear.
This study reports on how the NO3− introduced by atmospheric pressure low-temperature air plasma jet irradiation is distributed within the onion. Additionally, we investigated the changes in glucose levels within the onion, which is a source for the production of the secondary metabolite polyphenols. By comparatively analyzing these results, we attempted to construct a model of the mechanism underlying the increase in polyphenol content.