A theory of the pi -nucleus optical potential is developed from the exact propagator of a pion in the presence of a nucleus. The crossed pi -nucleus diagrams, absent in previous work, are shown to have a significant effect on the cross sections and the elastic scattering wave functions of ...
目的:研究攀枝花地区野生番石榴叶水提取物降血糖作用。方法:雄性昆明种小鼠,诱导葡萄糖性、肾上腺素性和链脲佐菌素性高血糖,受试物灌胃处理。测定处理后小鼠尾静脉血血糖,比较给予受试物前后血糖水平的变化。结果:番石榴叶水提取物不同程度降...