HPA/SiO_2 was prepared by sol-gel method and its activity for photocatalytic degradation of methyl orange was studied by using an ultraviolet lamp and a photochemical reaction instrument.

Effects of Jieyuwan on HPA axis and immune system in chronic stress models in rats;

Mechanisms of hippocampal NMDA receptor in regulating over-excitation of HPA axis in rats with scalding-induced stress;

Effects of hippocampal NMDA receptor on HPA axis activity following severe burn;

The factors influencing the modifying efficiency,such as amount of modifier,modifying time,rotating speed of the mill and ratio of ball and silica,were discussed.

Core/shell composite microparticles with silica nanoparticle as core and crosslinked poly(tert-butylmethacrylate) as shell were prepared by seed-emulsion polymerization utilizing 3-(trimethoxysilyl)propyl methacrylate(MPS) modified silica particles as seeds,tert-butylmethacrylate as monomer and sodium dodecyl sulfate(SDS) as emulsifier.

By using of the alkalinity catalyst of ammonia and controlling the water content, the ethyl-orthosilicate occured hydrolytic reaction to form nano-silica dispersed in ethanol, then washed, dried and silica nanoparticles were prepared.