高温素材プロセッシング／湿式素材プロセッシング／新材料

[3K0201-08-05] ESR study of free radical generation and scavenging capacity

○LANYIN ZHANG¹, Gjergj Dodbiba¹, Toyohisa Fujita¹ (1. University of Tokyo)

司会：安田 幸司（京都大学）、松浦 宏行（東京大学）

Keywords:Free radical, ESR, nanobubble

Free radical is an atomic and molecular species with unpaired electrons. Free radicals are highly chemically reactive and usually short-lived because of those unpaired electrons, and thus has a strong capacity of oxidation. This capacity makes free radical useful sometimes but free radical existing in our body can be dangerous. Electron Spin Resonance (ESR) is a technique which can detect unpaired electron. ESR technique was utilized in this research as a proper method to measure the content of free radical. Towada stone powder is chosen to study its free radical generation capacity, and simultaneously nano bubble dissolved water is chosen to study its free radical scavenging capacity. It is found that Towada stone powder calcined at 800℃ had the strongest hydroxyl radical generation capacity. And CO₂ nano bubble dissolved water showed the best scavenging capacity of hydroxyl radical but has negative effect on scavenging superoxide radical.