ABSTRACT
The present valuation of experimental teaching effect can not adapt to the needs of the experimental reform and develpoment due to its deficiency. After setting up the experimental curriculum,A Multivariate method has been developed to evaluate students’ experimental ability from their innovating,operating,expressing ability and scientific quality.
ABSTRACT
Objective To study the effect of Aloe polysaccharides (AP) on the thymocytic apoptosis and cell cycle in ? - ray irradiated mice. Methods Single- cell thymocytes suspension was sampled at different time points to observe the thymocytic apoptosis and cell cycle by flow cytometry. DNA ladders were tested by 1.8 % agarose gel electrophoresis. Transmission electron microscopy was used to examine the ultrastructure of thymocytes. Results Pre- treating with AP (50 mg/kg,ip) 30 min before irradiation could significantly decrease the percentages of apoptotic thymocytes in? - ray irradiated mice 4 h, 8 h and 12 h after irradiation, increase the percentage of thymocytes at G0/G1 phase and reduce the percentage of thymocytes at G2/M phase. It could also lessen the DNA ladders and reduce the number of apoptotic bodies. Conclusion The protective effects of AP on the thymocytes in ? - ray irradiated mice is related with the alleviation of the disorder of cell cycle and the inhibition of the apoptosis of thymocytes.
ABSTRACT
Objective To investigate the effect of ajoene on thrombosis and explore the possible mechanism.Method SD rats were randomly divided into five different groups and administered ajoene in 7d.The effect of ajoene on thrombosis in rats was observed with the thrombogenesis model of artery-vein bypass.The serum level of vascular cell adhesion molecule-1(VCAM-1) and P-selectin(Ps)were measured.To observe the effect of ajoene on platelet aggregation,arachidonic acid was used to induce platelet aggregation and platelet function was evaluated by turbidimetry in rabbit.Results Ajoene significantly inhibited the the thrombosis of artery-vein bypass in rats and reduced rate of platelet maximal aggregation and decreased the P-selectin concentration in serum at 25,50,75mg/kg (P