采用原位碘化学沉积法制备了I_2/碳纤维布复合材料作为二次水系锌离子电池正极材料。用扫描电子显微镜法(SEM)、X射线衍射光谱法(XRD)、热重分析和电化学性能测试对所得样品的结构、形貌、稳定性和电化学性能进行了表征。测试结果表明,...采用原位碘化学沉积法制备了I_2/碳纤维布复合材料作为二次水系锌离子电池正极材料。用扫描电子显微镜法(SEM)、X射线衍射光谱法(XRD)、热重分析和电化学性能测试对所得样品的结构、形貌、稳定性和电化学性能进行了表征。测试结果表明,碘以非晶态的形式均匀分布在碳纤维布里,提高了碘的热稳定性,在0.5 C充放电倍率下,样品的首次可逆比容量为257 m Ah/g,经过200次循环后,容量保持率为90%,表现出良好的可逆比容量和循环稳定性能。展开更多
Background The usual transbronchial coagulation techniques include microwave, argon plasma coagulation （APC）, electrocautery and cryotherapy. However, there are serious clinical problems in the safety of each. By an...Background The usual transbronchial coagulation techniques include microwave, argon plasma coagulation （APC）, electrocautery and cryotherapy. However, there are serious clinical problems in the safety of each. By analyzing the experimental data and clinical observations, we observed the variable effects of different coagulation techniques via bronchofibroscopy, to look for an optimal interventional management of luminal bronchus diseases, and evaluate the safety and the equivalent point. Methods Four kinds of coagulation techniques under bronchoscopy were performed on the fresh bronchus of healthy sheep, and the pathologic changes in all groups were observed under the microscope. The different treatment parameters were as follows： microwave 60 Wxl second, 3 seconds, 5 seconds and 40 W×1 second, 3 seconds, 5 seconds; APC 40 W×1 second, 3 seconds, 5 seconds; electrocautery 40 W×1 second, 3 seconds, 5 seconds; cryotherapy 100 Ω×60 seconds, 120 seconds. Results After treatment, ovine bronchial mucosa in all groups showed pathologic changes such as local necrosis and amotio of the mucosa lining epithelium, local submucosa coagulative necrosis or tissue defects, while inflammation in the surrounding tissue was not obvious. Under the same output power and action time, different methods had different outcomes. The damage by APC was the most superficial, microwave was the second, and electrocautery caused the worst damage. The study also found that effects of electrocautery at 40 W×3 seconds, microwave at 40 W×5 seconds or 60 W×3 seconds, APC at 40 W×5 seconds and cryotherapy at 100 Ω×120 seconds were the equivalent point conditions. The appearance included mucosa absence, partial submucosa absence, and collagen fiber coagulation in treatment areas. Conclusions Each coagulation technique has its own characteristic. It is very important to choose the appropriate power and action time of the suitable method according to the therapy requirement.展开更多
文摘采用原位碘化学沉积法制备了I_2/碳纤维布复合材料作为二次水系锌离子电池正极材料。用扫描电子显微镜法(SEM)、X射线衍射光谱法(XRD)、热重分析和电化学性能测试对所得样品的结构、形貌、稳定性和电化学性能进行了表征。测试结果表明,碘以非晶态的形式均匀分布在碳纤维布里,提高了碘的热稳定性,在0.5 C充放电倍率下,样品的首次可逆比容量为257 m Ah/g,经过200次循环后,容量保持率为90%,表现出良好的可逆比容量和循环稳定性能。
文摘Background The usual transbronchial coagulation techniques include microwave, argon plasma coagulation （APC）, electrocautery and cryotherapy. However, there are serious clinical problems in the safety of each. By analyzing the experimental data and clinical observations, we observed the variable effects of different coagulation techniques via bronchofibroscopy, to look for an optimal interventional management of luminal bronchus diseases, and evaluate the safety and the equivalent point. Methods Four kinds of coagulation techniques under bronchoscopy were performed on the fresh bronchus of healthy sheep, and the pathologic changes in all groups were observed under the microscope. The different treatment parameters were as follows： microwave 60 Wxl second, 3 seconds, 5 seconds and 40 W×1 second, 3 seconds, 5 seconds; APC 40 W×1 second, 3 seconds, 5 seconds; electrocautery 40 W×1 second, 3 seconds, 5 seconds; cryotherapy 100 Ω×60 seconds, 120 seconds. Results After treatment, ovine bronchial mucosa in all groups showed pathologic changes such as local necrosis and amotio of the mucosa lining epithelium, local submucosa coagulative necrosis or tissue defects, while inflammation in the surrounding tissue was not obvious. Under the same output power and action time, different methods had different outcomes. The damage by APC was the most superficial, microwave was the second, and electrocautery caused the worst damage. The study also found that effects of electrocautery at 40 W×3 seconds, microwave at 40 W×5 seconds or 60 W×3 seconds, APC at 40 W×5 seconds and cryotherapy at 100 Ω×120 seconds were the equivalent point conditions. The appearance included mucosa absence, partial submucosa absence, and collagen fiber coagulation in treatment areas. Conclusions Each coagulation technique has its own characteristic. It is very important to choose the appropriate power and action time of the suitable method according to the therapy requirement.
