The finite element analysis and calculation were performed for the blanket first-wall made of SiC/SiC composite material for Advanced Steady-state Tokamak Reactor 2, A-SSTR2, which at present is conceptually designed ...The finite element analysis and calculation were performed for the blanket first-wall made of SiC/SiC composite material for Advanced Steady-state Tokamak Reactor 2, A-SSTR2, which at present is conceptually designed in Naka Fusion research establishment, JAERI. Comparison analysis and design window were analyzed using the finite element code ADINA 7.4. Through a 2D calculation for various geometrical configurations and sensitive material properties, a fundamental guideline for the first wall and blanket design are established with respect to maximum temperature, thermal and mechanical stress for many configurations. To satisfy hydrodynamic requirement, a4d4 (the dimension of coolant channel is 4 mm x 8 mm, and the distance between neighboring channels is 4 mm) was chosen as a design point for high thermal conductivity up to 50 W/m.K. In order to find a good solution for lower conductivity, more elaborate work should be done in the future. Nonetheless, the outline of design window for a specific structural material is very useful for the future A-SSTR2 first wall design.展开更多
目的探讨microRNA-31对脊髓损伤后胃肠动力因素的作用。方法将36只microRNA-31转基因小鼠和36只FVB小鼠分别设为对照组和模型组,用Impactor M-Ⅲ脊髓撞击器建立小鼠脊髓损伤模型。用BBB运动功能评分评估小鼠下肢的恢复情况。HE染色观察...目的探讨microRNA-31对脊髓损伤后胃肠动力因素的作用。方法将36只microRNA-31转基因小鼠和36只FVB小鼠分别设为对照组和模型组,用Impactor M-Ⅲ脊髓撞击器建立小鼠脊髓损伤模型。用BBB运动功能评分评估小鼠下肢的恢复情况。HE染色观察脊髓组织的变化。用Real-time PCR法检测生长抑素受体(SSTR2)mRNA的表达,用免疫荧光法检测一氧化氮合酶(iNOS)蛋白和SSTR2蛋白的表达。结果造模后第3天、第7天和第14天,脊髓组织破坏、坏死、空泡形成,胶原纤维明显增加。造模后第14天,FVB模型组与对照组比较,SSTR2 m RNA的表达明显升高(P<0.05),iNOS蛋白和SSTR2蛋白的表达量明显升高;microRNA-31转基因小鼠模型组与对照组比较,SSTR2 mRNA的表达明显升高(P<0.05),iNOS蛋白和SSTR2蛋白的表达量明显升高;microRNA-31转基因小鼠模型组与FVB模型组比较,SSTR2 m RNA的表达明显降低(P<0.05),iNOS蛋白和SSTR2蛋白的表达量明显降低。结论脊髓损伤后胃肠动力障碍的发生可能与SSTR2 m RNA的表达上调、SSTR2蛋白和i NOS蛋白的表达增高有关。高表达的microRNA-31可能与脊髓损伤后胃肠动力障碍的恢复有关。展开更多
文摘The finite element analysis and calculation were performed for the blanket first-wall made of SiC/SiC composite material for Advanced Steady-state Tokamak Reactor 2, A-SSTR2, which at present is conceptually designed in Naka Fusion research establishment, JAERI. Comparison analysis and design window were analyzed using the finite element code ADINA 7.4. Through a 2D calculation for various geometrical configurations and sensitive material properties, a fundamental guideline for the first wall and blanket design are established with respect to maximum temperature, thermal and mechanical stress for many configurations. To satisfy hydrodynamic requirement, a4d4 (the dimension of coolant channel is 4 mm x 8 mm, and the distance between neighboring channels is 4 mm) was chosen as a design point for high thermal conductivity up to 50 W/m.K. In order to find a good solution for lower conductivity, more elaborate work should be done in the future. Nonetheless, the outline of design window for a specific structural material is very useful for the future A-SSTR2 first wall design.
文摘目的探讨microRNA-31对脊髓损伤后胃肠动力因素的作用。方法将36只microRNA-31转基因小鼠和36只FVB小鼠分别设为对照组和模型组,用Impactor M-Ⅲ脊髓撞击器建立小鼠脊髓损伤模型。用BBB运动功能评分评估小鼠下肢的恢复情况。HE染色观察脊髓组织的变化。用Real-time PCR法检测生长抑素受体(SSTR2)mRNA的表达,用免疫荧光法检测一氧化氮合酶(iNOS)蛋白和SSTR2蛋白的表达。结果造模后第3天、第7天和第14天,脊髓组织破坏、坏死、空泡形成,胶原纤维明显增加。造模后第14天,FVB模型组与对照组比较,SSTR2 m RNA的表达明显升高(P<0.05),iNOS蛋白和SSTR2蛋白的表达量明显升高;microRNA-31转基因小鼠模型组与对照组比较,SSTR2 mRNA的表达明显升高(P<0.05),iNOS蛋白和SSTR2蛋白的表达量明显升高;microRNA-31转基因小鼠模型组与FVB模型组比较,SSTR2 m RNA的表达明显降低(P<0.05),iNOS蛋白和SSTR2蛋白的表达量明显降低。结论脊髓损伤后胃肠动力障碍的发生可能与SSTR2 m RNA的表达上调、SSTR2蛋白和i NOS蛋白的表达增高有关。高表达的microRNA-31可能与脊髓损伤后胃肠动力障碍的恢复有关。
