Instability analysis of spin-electron-acoustic waves and the appearance of separated spin electron cyclotron mode in spin-polarized magnetized quantum plasma.

Linear and nonlinear characteristics of electrostatic waves are studied in a magnetized plasma consisting of spin-up (n_{↑}) and spin-down (n_{↓}) state populations with uniformly distributed static ions in the background. The linear analysis shows the existence of four modes. One of these modes, termed the separated spin electron cyclotron wave, is found to be due to the separated spin populations.

Radical-scavenging properties of ferrocenyl chalcones.

The radical-scavenging capacities of ferrocenyl group and phenolic hydroxyl group in ferrocenyl chalcone were identified in this work. 1,1'-Diacetylferrocene was applied to condense with benzaldehyde, vanillin, and protocatechualdehyde to produce ferrocenyl chalcones, which were employed to interact with 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS(+)), 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH), and galvinoxyl radical, respectively. It was found that ferrocenyl chalcones as well as diacetylferrocene can trap these radicals effectively, and thus, concluded that both iron atom in ferrocene and phenolic hydroxyl group played the radical-scavenging role, and the radical-scavenging capacity of iron atom in ferrocene was even higher than that of phenolic hydroxyl group.