大模场面积光纤激光器79．4W单横模输出

abstract {A large-mode-area (LMA) multimode fiber before and after coiling was studied contrastively in the experiment. Single-transverse-mode output was achieved when the fiber laser was coiled around a mandrel of 65 mm radius. After coiling, beam quality factor of the laser dropped from 1.24 to 1.06 and slope efficiency dropped from 64.7% to 54.3%. When the launched pump power was 149 W, the corresponding output power was 94.7 W and 79.4 W, respectively. However, the brightness of the coiled fiber laser was 1.15 times that of the uncoiled. Coiled modal losses of different modes were also calculated for the fiber employed in the experiment. The measured results agree well with the calculated ones.}

昆明山海棠对中国仓鼠V_(79)细胞二酰基甘油含量的影响

研究以昆明山海棠根部水抽提物(Tripterygium hypoglaucum (Level) Hutch,THH)处理中国仓鼠V_(79)细胞,通过检测V_(79)细胞C-M细胞频率以及二酰基甘油(1,2-diacylgcerol,DAG)的含量测定,分析了THH诱发非整倍体与细胞醇磷酯信号通路的关系。结果指出:THH能在1mg/ml、2mg/ml两个剂量上使V_(79)细胞的DAG含量显著升高(P<0.001),并明显的提高C-M细胞频率(P<0.05),提示肌醇酯信号通路是介导THH诱发非整倍体的途径之一。