目的比较锁孔内镜和开颅治疗基底节区脑出血的效果。方法回顾性比较锁孔内镜组28例和传统开颅组30例基底节区脑出血的临床资料,比较两组血肿清除率、感染率和再出血率,术后3个月采用GOS评分对两组预后进行评价。结果锁孔内镜组血肿清除...目的比较锁孔内镜和开颅治疗基底节区脑出血的效果。方法回顾性比较锁孔内镜组28例和传统开颅组30例基底节区脑出血的临床资料,比较两组血肿清除率、感染率和再出血率,术后3个月采用GOS评分对两组预后进行评价。结果锁孔内镜组血肿清除率明显高于开颅组(92.1%±3.9%vs 86.5%±9.1%,t=3.007,P=0.004),锁孔内镜组手术时间明显少于开颅组(138 min±15 min vs 232 min±16 min,t=-23.041,P=0.000),锁孔内镜组感染率显著低于开颅组(21.4%vs 50.0%,χ~2=5.119,P=0.024)。两组术后GOS预后评分无显著性差异(Z=-1.754,P=0.079)。结论锁孔内镜是一种治疗脑出血安全、可靠的手术方法。展开更多
Shape selective alkylation of polynuclear aromatics has begun to receive increasing attention. 2,6 dialkylnaphthalenes are important raw materials for manufacturing high quality polyester fibers and plastics. Understa...Shape selective alkylation of polynuclear aromatics has begun to receive increasing attention. 2,6 dialkylnaphthalenes are important raw materials for manufacturing high quality polyester fibers and plastics. Understanding of the reaction and the catalysis for conversion of polycyclic aromatic hydrocarbons is needed both from fundamental and practical view points. In this paper, alkylation of naphthalene with propene over a series of dealuminated mordenite with different Si/Al ratios was carried out in an autoclave with an electromagnetical stirrer. Textural property of the dealuminated mordenite was determined by nitrogen adsorption. The amount of the acid sites was measured by NH 3 TPD. The catalytic activity of HM and β shape selectivity for products increased with increasing the Si/Al ratio in HM. Moreover, the selectivity for alkylation with propene was also increased by dealumination treatment. The increase of the catalytic activity was attributed to the formation of mesopores, which significantly promoted the diffusion of reactants and products in mordenite. It was suggested that the increase of β selectivity resulted from the elimination of acid sites from the external surface, and the selectivity for alkylation with propene was improved owing to the creation of the interconnection between 12 ring and 8 rimg channels by dealumination.展开更多
文摘目的比较锁孔内镜和开颅治疗基底节区脑出血的效果。方法回顾性比较锁孔内镜组28例和传统开颅组30例基底节区脑出血的临床资料,比较两组血肿清除率、感染率和再出血率,术后3个月采用GOS评分对两组预后进行评价。结果锁孔内镜组血肿清除率明显高于开颅组(92.1%±3.9%vs 86.5%±9.1%,t=3.007,P=0.004),锁孔内镜组手术时间明显少于开颅组(138 min±15 min vs 232 min±16 min,t=-23.041,P=0.000),锁孔内镜组感染率显著低于开颅组(21.4%vs 50.0%,χ~2=5.119,P=0.024)。两组术后GOS预后评分无显著性差异(Z=-1.754,P=0.079)。结论锁孔内镜是一种治疗脑出血安全、可靠的手术方法。
文摘Shape selective alkylation of polynuclear aromatics has begun to receive increasing attention. 2,6 dialkylnaphthalenes are important raw materials for manufacturing high quality polyester fibers and plastics. Understanding of the reaction and the catalysis for conversion of polycyclic aromatic hydrocarbons is needed both from fundamental and practical view points. In this paper, alkylation of naphthalene with propene over a series of dealuminated mordenite with different Si/Al ratios was carried out in an autoclave with an electromagnetical stirrer. Textural property of the dealuminated mordenite was determined by nitrogen adsorption. The amount of the acid sites was measured by NH 3 TPD. The catalytic activity of HM and β shape selectivity for products increased with increasing the Si/Al ratio in HM. Moreover, the selectivity for alkylation with propene was also increased by dealumination treatment. The increase of the catalytic activity was attributed to the formation of mesopores, which significantly promoted the diffusion of reactants and products in mordenite. It was suggested that the increase of β selectivity resulted from the elimination of acid sites from the external surface, and the selectivity for alkylation with propene was improved owing to the creation of the interconnection between 12 ring and 8 rimg channels by dealumination.
