Electron Microscopic Cytochemical Study of Cyclic Adenosine Monophosphate Phosphodiesterase Activity During Gold Acclimation of Wheat Seedlings Effect of Rheum tanguticum Maxim. ex Balf. on cAMP in the Central Nervous System Effect of Salvia miltiorrhiza extracts on formation of morphine physical dependence in mice and its possible mechanism Effect of Salvia miltiorrhiza extracts on formation of morphine physical dependence in mice and its possible mechanism The Effects of Allitridum on the Proliferation of Rabbit Aortic Smooth Muscle Cells in Vitro