To investigate the impact of limestone powder on the chloride ion concentration coefficient of cement pastes,various techniques such as scanning electron microscopy(SEM),X-ray diffraction(XRD),thermogravimetric analys...To investigate the impact of limestone powder on the chloride ion concentration coefficient of cement pastes,various techniques such as scanning electron microscopy(SEM),X-ray diffraction(XRD),thermogravimetric analysis(TGA),and mercury-porosimetry(MIP)were employed in this paper.The findings demonstrate that the creation of Friedel's salt is inversely associated with the addition of limestone powder,that is,Friedel's salt production is lessened by adding more limestone powder,however,the coefficient of chloride ion concentration initially decreased and then increased again,as does the porosity,and most likely the pore size as well.The specific surface area of limestone powder has increased,and the content of Friedel’s salt increased first and then decreased.However,the shifting trend of Friedel's salt and chloride ion concentration coefficient is in direct opposition,and the pore structure was therefore significantly enhanced.The results of this study offer robust theoretical backing for the inclusion of limestone powder in concrete and provide a positive assessment of its potential applications.展开更多
目的探讨舒芬太尼联合羟考酮在老年股骨骨折患者术后镇痛效果及对认知功能的影响。方法选取2016年1月至2018年12月于本院骨科就诊并接受治疗的90例老年股骨骨折患者,随机分为对照组和联合组,各45例。对比两组患者疼痛差异、认知功能情...目的探讨舒芬太尼联合羟考酮在老年股骨骨折患者术后镇痛效果及对认知功能的影响。方法选取2016年1月至2018年12月于本院骨科就诊并接受治疗的90例老年股骨骨折患者,随机分为对照组和联合组,各45例。对比两组患者疼痛差异、认知功能情况、认知功能障碍发生率及不良反应发生率。结果联合组患者术后2 h、8 h、12 h VAS评分显著低于对照组(P<0.05),两组患者术后24 h VAS评分比较差异无统计意义。联合组术后8 h、12 h、24 h MMSE评分明显高于同期对照组(P<0.05),两组患者术后2 h认知功能比较差异无统计学意义。联合组患者术后72 h内POCD发生率及不良反应发生率明显低于对照组(P<0.05)。结论舒芬太尼联合羟考酮具有协同作用,可增强老年股骨骨折患者术后镇痛效果,降低认知功能障碍及不良反应发生率,值得临床推广应用。展开更多
[目的]分析血清补体C1q水平对冠心病的诊断价值。[方法]计算机检索中国知网、万方数据库、PubMed、Web of Science、Cochrane、Embase等数据库,搜集血清补体C1q水平对冠心病诊断价值的病例-对照研究,检索时间截至2021年9月。采用RevMan...[目的]分析血清补体C1q水平对冠心病的诊断价值。[方法]计算机检索中国知网、万方数据库、PubMed、Web of Science、Cochrane、Embase等数据库,搜集血清补体C1q水平对冠心病诊断价值的病例-对照研究,检索时间截至2021年9月。采用RevMan5.4和Stata16.0软件进行Meta分析。[结果]共有10篇文献符合纳入标准,研究对象共计2 011例,Meta分析结果显示血清补体C1q水平在冠心病组与对照组中的差异无统计学意义(SMD=-0.19,95%CI:-0.85~0.48,P=0.58)。[结论]血清补体C1q水平也许不能够作为冠心病诊断的一项指标。展开更多
基金Funded by the National Natural Science Foundation of China(No.52008304)the Natural Science Foundation of Fujian Province(No.2023J05021)the Startup Foundation of Scientific Research by Fuzhou University(Nos.XRC-18016 and GXRC21060)。
文摘To investigate the impact of limestone powder on the chloride ion concentration coefficient of cement pastes,various techniques such as scanning electron microscopy(SEM),X-ray diffraction(XRD),thermogravimetric analysis(TGA),and mercury-porosimetry(MIP)were employed in this paper.The findings demonstrate that the creation of Friedel's salt is inversely associated with the addition of limestone powder,that is,Friedel's salt production is lessened by adding more limestone powder,however,the coefficient of chloride ion concentration initially decreased and then increased again,as does the porosity,and most likely the pore size as well.The specific surface area of limestone powder has increased,and the content of Friedel’s salt increased first and then decreased.However,the shifting trend of Friedel's salt and chloride ion concentration coefficient is in direct opposition,and the pore structure was therefore significantly enhanced.The results of this study offer robust theoretical backing for the inclusion of limestone powder in concrete and provide a positive assessment of its potential applications.
文摘目的探讨舒芬太尼联合羟考酮在老年股骨骨折患者术后镇痛效果及对认知功能的影响。方法选取2016年1月至2018年12月于本院骨科就诊并接受治疗的90例老年股骨骨折患者,随机分为对照组和联合组,各45例。对比两组患者疼痛差异、认知功能情况、认知功能障碍发生率及不良反应发生率。结果联合组患者术后2 h、8 h、12 h VAS评分显著低于对照组(P<0.05),两组患者术后24 h VAS评分比较差异无统计意义。联合组术后8 h、12 h、24 h MMSE评分明显高于同期对照组(P<0.05),两组患者术后2 h认知功能比较差异无统计学意义。联合组患者术后72 h内POCD发生率及不良反应发生率明显低于对照组(P<0.05)。结论舒芬太尼联合羟考酮具有协同作用,可增强老年股骨骨折患者术后镇痛效果,降低认知功能障碍及不良反应发生率,值得临床推广应用。
文摘[目的]分析血清补体C1q水平对冠心病的诊断价值。[方法]计算机检索中国知网、万方数据库、PubMed、Web of Science、Cochrane、Embase等数据库,搜集血清补体C1q水平对冠心病诊断价值的病例-对照研究,检索时间截至2021年9月。采用RevMan5.4和Stata16.0软件进行Meta分析。[结果]共有10篇文献符合纳入标准,研究对象共计2 011例,Meta分析结果显示血清补体C1q水平在冠心病组与对照组中的差异无统计学意义(SMD=-0.19,95%CI:-0.85~0.48,P=0.58)。[结论]血清补体C1q水平也许不能够作为冠心病诊断的一项指标。
