目的:评价艾灸与西药治疗慢性萎缩性胃炎(CAG)的临床疗效及安全性。方法:计算机检索Pubmed、Cochrane Library、Embase、Web of Science、国家知识基础设施数据库(CNKI)、中文科技期刊数据库(CCD)、中国学术期刊数据库(CSPD)、中国生物...目的:评价艾灸与西药治疗慢性萎缩性胃炎(CAG)的临床疗效及安全性。方法:计算机检索Pubmed、Cochrane Library、Embase、Web of Science、国家知识基础设施数据库(CNKI)、中文科技期刊数据库(CCD)、中国学术期刊数据库(CSPD)、中国生物医学文献数据库(CBM)中有关艾灸对比西药治疗CAG的临床随机对照试验,检索时间均从建库至2021年10月31日,根据本研究设定的纳排标准筛选文献并提取资料。采用“Cochrane偏倚风险评估工具”对纳入文献进行质量评价,采用“RevMan 5.4.1”软件对数据进行分析。结果:最终纳入13篇RCT,共计1062名CAG受试者,但总体纳入文献质量不高。Meta分析结果显示,艾灸治疗在改善CAG患者的临床有效率优于西药组。在改善临床症状方面,艾灸治疗缓解CAG患者胃脘灼痛、胃脘胀满、胃脘痞闷评分方面均优于西药组;在改善胃肠分泌蛋白方面,艾灸改善胃蛋白酶原Ⅰ(PGⅠ)/PGⅡ、G-17水平优于西药组;然而艾灸与西药在改善胃黏膜胃镜有效率、胃镜下及病理评分方面差异无统计学意义。结论:艾灸治疗CAG的疗效优于西药,但受纳入文献质量及数量的局限性,验证艾灸治疗CAG的疗效仍需更多高质量研究。展开更多
A lot of mixed clay-resin waste sand from large-scale iron foundries is discharged every day; so mixed waste sand reclamation in low cost and high quality has a great realistic significance. In the study to investigat...A lot of mixed clay-resin waste sand from large-scale iron foundries is discharged every day; so mixed waste sand reclamation in low cost and high quality has a great realistic significance. In the study to investigate the possibility of reusing two types of waste foundry sands, resin bonded sand and clay bonded sand which came from a Chinese casting factory, a new low-cost reclamation method of the mixed foundry waste sand based on the wet-thermal composite reclamation was proposed. The waste resin bonded sand was first reclaimed by a thermal method and the waste clay bonded sand was reclaimed by a wet method. Then, hot thermal reclaimed sand and the dehydrated wet reclaimed sand were mixed in certain proportions so that the hot thermal reclaimed sand dried the wet reclaimed sand leaving some water. The thermal reclamation efficiency of the waste resin bonded sand was researched at different heat levels. The optimized wet reclamation process of the waste clay bonded sand was achieved by investigating the effects of wet reclamation times, sand-water ratio and pH value on the reclaimed sand characteristics. The composite reclamation cost also was calculated. The research results showed that the properties of the mixed reclaimed sand can satisfy the application requirements of foundries; in which the temperature of the thermal reclamation waste resin bonded sand needs to be about 800 oC, the number of cycles of wet reclamation waste clay bonded sand should reach four to five, the optimal sand-water ratio of wet reclamation is around 1:1.5, and the pH value should be adjusted by adding acid. The mass ratio of hot thermal reclaimed sand to dehydrated wet reclaimed sand is about 1:2.5, and the composite reclaimed sand cost is around 100 yuan RMB per ton.展开更多
文摘目的:评价艾灸与西药治疗慢性萎缩性胃炎(CAG)的临床疗效及安全性。方法:计算机检索Pubmed、Cochrane Library、Embase、Web of Science、国家知识基础设施数据库(CNKI)、中文科技期刊数据库(CCD)、中国学术期刊数据库(CSPD)、中国生物医学文献数据库(CBM)中有关艾灸对比西药治疗CAG的临床随机对照试验,检索时间均从建库至2021年10月31日,根据本研究设定的纳排标准筛选文献并提取资料。采用“Cochrane偏倚风险评估工具”对纳入文献进行质量评价,采用“RevMan 5.4.1”软件对数据进行分析。结果:最终纳入13篇RCT,共计1062名CAG受试者,但总体纳入文献质量不高。Meta分析结果显示,艾灸治疗在改善CAG患者的临床有效率优于西药组。在改善临床症状方面,艾灸治疗缓解CAG患者胃脘灼痛、胃脘胀满、胃脘痞闷评分方面均优于西药组;在改善胃肠分泌蛋白方面,艾灸改善胃蛋白酶原Ⅰ(PGⅠ)/PGⅡ、G-17水平优于西药组;然而艾灸与西药在改善胃黏膜胃镜有效率、胃镜下及病理评分方面差异无统计学意义。结论:艾灸治疗CAG的疗效优于西药,但受纳入文献质量及数量的局限性,验证艾灸治疗CAG的疗效仍需更多高质量研究。
基金supported by the National Natural Science Foundation (Grant numbers:50575085,51075163 and 51375187)
文摘A lot of mixed clay-resin waste sand from large-scale iron foundries is discharged every day; so mixed waste sand reclamation in low cost and high quality has a great realistic significance. In the study to investigate the possibility of reusing two types of waste foundry sands, resin bonded sand and clay bonded sand which came from a Chinese casting factory, a new low-cost reclamation method of the mixed foundry waste sand based on the wet-thermal composite reclamation was proposed. The waste resin bonded sand was first reclaimed by a thermal method and the waste clay bonded sand was reclaimed by a wet method. Then, hot thermal reclaimed sand and the dehydrated wet reclaimed sand were mixed in certain proportions so that the hot thermal reclaimed sand dried the wet reclaimed sand leaving some water. The thermal reclamation efficiency of the waste resin bonded sand was researched at different heat levels. The optimized wet reclamation process of the waste clay bonded sand was achieved by investigating the effects of wet reclamation times, sand-water ratio and pH value on the reclaimed sand characteristics. The composite reclamation cost also was calculated. The research results showed that the properties of the mixed reclaimed sand can satisfy the application requirements of foundries; in which the temperature of the thermal reclamation waste resin bonded sand needs to be about 800 oC, the number of cycles of wet reclamation waste clay bonded sand should reach four to five, the optimal sand-water ratio of wet reclamation is around 1:1.5, and the pH value should be adjusted by adding acid. The mass ratio of hot thermal reclaimed sand to dehydrated wet reclaimed sand is about 1:2.5, and the composite reclaimed sand cost is around 100 yuan RMB per ton.
