The present paper reviews new findings in redoxproperties of the active constituent of Chinese herbalmedicine(CHM),a kind of CHM or a compoundprescription as an antioxidant.Firstly,we have studiedtheir antioxidant and...The present paper reviews new findings in redoxproperties of the active constituent of Chinese herbalmedicine(CHM),a kind of CHM or a compoundprescription as an antioxidant.Firstly,we have studiedtheir antioxidant and prooxidant actions with electronspin resonance(ESR).The results show that the activecomponents from over 10 kinds of CHM are able toscavenge the oxygen free radicals but propyl gallate展开更多
In this Letter, ceramic Nd：YAG is charactrizeby electron spin resonance （ESR） measurements. The ESR results indicate that the polycrystalline ceramic Nd：YAG has barely native defects and impurity ions localization...In this Letter, ceramic Nd：YAG is charactrizeby electron spin resonance （ESR） measurements. The ESR results indicate that the polycrystalline ceramic Nd：YAG has barely native defects and impurity ions localization defects, compared to an Nd：YAG crystal with the same Nd doping concentration, due to its density structure by sintering in a vacuum pure raw material and additives during the fabrication. It may conclude that the high quality ceramic Nd：YAG may have greater ability on optical characteristic, mechanical performance, and laser damage than that of the crystals, which is a promising candidate to use on laser diode-pumped solid-state lasers.展开更多
文摘The present paper reviews new findings in redoxproperties of the active constituent of Chinese herbalmedicine(CHM),a kind of CHM or a compoundprescription as an antioxidant.Firstly,we have studiedtheir antioxidant and prooxidant actions with electronspin resonance(ESR).The results show that the activecomponents from over 10 kinds of CHM are able toscavenge the oxygen free radicals but propyl gallate
文摘In this Letter, ceramic Nd：YAG is charactrizeby electron spin resonance （ESR） measurements. The ESR results indicate that the polycrystalline ceramic Nd：YAG has barely native defects and impurity ions localization defects, compared to an Nd：YAG crystal with the same Nd doping concentration, due to its density structure by sintering in a vacuum pure raw material and additives during the fabrication. It may conclude that the high quality ceramic Nd：YAG may have greater ability on optical characteristic, mechanical performance, and laser damage than that of the crystals, which is a promising candidate to use on laser diode-pumped solid-state lasers.
