Anti-depressant effect of curcumin-loaded guanidine-chitosan thermo-sensitive hydrogel by nasal delivery.

Curcumin, a polyphenol compound extracted from the roots of plants, possesses anti-depressant effect by regulating the levels of neuroendocrine immunological factors. The purpose of this study was to investigate the anti-depressant effect of curcumin through nasal delivery. The results of phase solubility, Fourier transform infrared spectra, Differential scanning calorimetry, X-ray powder diffractometry and H NMR spectra assays showed that curcumin/hydroxypropyl-β-cyclodextrin complex had been obtained.

[Effect of CO2 fertilization on residual concentration of cypermethrin in rhizosphere of C3 and C4 plant].

In order to achieve sustainable economic and environmental development in China, CO2-emission reduction and phytoremediation of polluted soil must be resolved. According to the effect of biological carbon sequestration on rhizosphere microenvironment, we propose that phytoremediation of polluted soil can be enhanced by CO2 fertilization, and hope to provide information for resolving dilemma of CO2-emission reduction and phytoremediation technology. In this study, effects of CO2 fertilization on cypermethrin reduction in rhizosphere of C3-plant (bush bean) and C4-plant (maize) were investigated.