目的系统评价强骨胶囊与维生素D治疗骨质疏松性骨折的有效性及安全性。以期为临床骨质疏松性骨折患者的药物选择提供参考。方法计算机检索Pub Med、Web of science、Cochrane图书馆、中国期刊全文数据库(CNKI)、中国生物医学文献数据库(...目的系统评价强骨胶囊与维生素D治疗骨质疏松性骨折的有效性及安全性。以期为临床骨质疏松性骨折患者的药物选择提供参考。方法计算机检索Pub Med、Web of science、Cochrane图书馆、中国期刊全文数据库(CNKI)、中国生物医学文献数据库(CBM)、中文科技期刊全文数据库(VIP)、万方数据库。搜集强骨胶囊与维生素D用于治疗骨质疏松性骨折的随机对照试验(RCT),检索年限均为建库以来至2017年1月27日。由两位研究者独立筛选文献、提取资料,并评价纳入研究的偏倚风险后,采用Rev Man 5.2软件进行Meta分析。结果最终纳入3个RCT,包括510例患者。Meta分析结果显示:强骨胶囊组患者的骨折愈合时间显著低于维生素D组,两组比较差异有统计学意义[MD=-3.68,95%CI(-4.60,-2.76),P<0.00001]。强骨胶囊组的治疗后股骨颈骨密度(bone mineral density,BMD)高于维生素D组,且差异均具有统计学意义[MD=0.03,95%CI(0.01,0.04),P=0.0002]。强骨胶囊组患者轻度不良反应发生数显著高于维生素D组,两组比较差异有统计学意义[OR=23.89,95%CI(4.56,125.11),P=0.0002]。结论强骨胶囊可以减少骨质疏松性骨折患者的骨折愈合时间,增强骨密度,但相较于维生素D,仍需注意胃肠道的不良反应。展开更多
城市污水处理厂中抗生素抗性菌的富集和扩散对受纳水体及公共卫生安全造成严重的威胁.本研究从上海某城市污水处理厂活性污泥中筛选得到一株四环素抗性菌株TC-1,基于形态特征、生理生化特性和16S r DNA结果鉴定,菌株TC-1属于节杆菌属(Ar...城市污水处理厂中抗生素抗性菌的富集和扩散对受纳水体及公共卫生安全造成严重的威胁.本研究从上海某城市污水处理厂活性污泥中筛选得到一株四环素抗性菌株TC-1,基于形态特征、生理生化特性和16S r DNA结果鉴定,菌株TC-1属于节杆菌属(Arthrobacter sp.).对节杆菌属菌株的全基因组分析表明,菌株TC-1含有多种抗生素抗性基因,包括四环素、氯霉素、大环内酯类和青霉素抗性基因.对比节杆菌属抗生素抗性基因的基因簇分析表明,这些抗性基因在节杆菌属中具有普遍存在性,表明其来源于相关菌株的遗传而非单个菌株的偶然获得.鉴于节杆菌属是潜在的病原性微生物,该结论可为废水生物处理系统中含抗生素抗性基因的致病微生物环境行为和风险评估提供参考.展开更多
The flow and the temperature in the threestream mixing flow of the lobed nozzle mixer-ejector with double-wall diffuser are numerically investigated. The domain of computation is divided into sub-domalns according to ...The flow and the temperature in the threestream mixing flow of the lobed nozzle mixer-ejector with double-wall diffuser are numerically investigated. The domain of computation is divided into sub-domalns according to the shapes of the double-plate and lobed nozzle. The three-dimensional body-fitted coordinated grids are generated respectively in these sub-domains by solving Lapalace's equations. Grids are dense on the boundaries and orthogonal at the lobe. The grids of all sub-domains compose the whole grid of the domain. In order to avoid the divergence of the computation as the serious non-orthogonality of the grid from the lobe, the co-located grid, SIMPLEC and Chen-Kim modified k-εturbulence model are applied. The great viscosity, the linear and simultaneous cooperation under-relaxation factors are used to solve the coupling of the fluid and solid. Results show that the air is ejected into the double wall section to form the cooling flow. The wall temperature of the double-wall diffuser is lower than that of the single-wall diffuser. The average wall temperature goes down as the diffuser angle increases at the range of 0～5°,otherwise, the result at the range of 5～10°is opposite.展开更多
文摘目的系统评价强骨胶囊与维生素D治疗骨质疏松性骨折的有效性及安全性。以期为临床骨质疏松性骨折患者的药物选择提供参考。方法计算机检索Pub Med、Web of science、Cochrane图书馆、中国期刊全文数据库(CNKI)、中国生物医学文献数据库(CBM)、中文科技期刊全文数据库(VIP)、万方数据库。搜集强骨胶囊与维生素D用于治疗骨质疏松性骨折的随机对照试验(RCT),检索年限均为建库以来至2017年1月27日。由两位研究者独立筛选文献、提取资料,并评价纳入研究的偏倚风险后,采用Rev Man 5.2软件进行Meta分析。结果最终纳入3个RCT,包括510例患者。Meta分析结果显示:强骨胶囊组患者的骨折愈合时间显著低于维生素D组,两组比较差异有统计学意义[MD=-3.68,95%CI(-4.60,-2.76),P<0.00001]。强骨胶囊组的治疗后股骨颈骨密度(bone mineral density,BMD)高于维生素D组,且差异均具有统计学意义[MD=0.03,95%CI(0.01,0.04),P=0.0002]。强骨胶囊组患者轻度不良反应发生数显著高于维生素D组,两组比较差异有统计学意义[OR=23.89,95%CI(4.56,125.11),P=0.0002]。结论强骨胶囊可以减少骨质疏松性骨折患者的骨折愈合时间,增强骨密度,但相较于维生素D,仍需注意胃肠道的不良反应。
文摘城市污水处理厂中抗生素抗性菌的富集和扩散对受纳水体及公共卫生安全造成严重的威胁.本研究从上海某城市污水处理厂活性污泥中筛选得到一株四环素抗性菌株TC-1,基于形态特征、生理生化特性和16S r DNA结果鉴定,菌株TC-1属于节杆菌属(Arthrobacter sp.).对节杆菌属菌株的全基因组分析表明,菌株TC-1含有多种抗生素抗性基因,包括四环素、氯霉素、大环内酯类和青霉素抗性基因.对比节杆菌属抗生素抗性基因的基因簇分析表明,这些抗性基因在节杆菌属中具有普遍存在性,表明其来源于相关菌株的遗传而非单个菌株的偶然获得.鉴于节杆菌属是潜在的病原性微生物,该结论可为废水生物处理系统中含抗生素抗性基因的致病微生物环境行为和风险评估提供参考.
文摘The flow and the temperature in the threestream mixing flow of the lobed nozzle mixer-ejector with double-wall diffuser are numerically investigated. The domain of computation is divided into sub-domalns according to the shapes of the double-plate and lobed nozzle. The three-dimensional body-fitted coordinated grids are generated respectively in these sub-domains by solving Lapalace's equations. Grids are dense on the boundaries and orthogonal at the lobe. The grids of all sub-domains compose the whole grid of the domain. In order to avoid the divergence of the computation as the serious non-orthogonality of the grid from the lobe, the co-located grid, SIMPLEC and Chen-Kim modified k-εturbulence model are applied. The great viscosity, the linear and simultaneous cooperation under-relaxation factors are used to solve the coupling of the fluid and solid. Results show that the air is ejected into the double wall section to form the cooling flow. The wall temperature of the double-wall diffuser is lower than that of the single-wall diffuser. The average wall temperature goes down as the diffuser angle increases at the range of 0～5°,otherwise, the result at the range of 5～10°is opposite.
