Carbon-doped copper ferrite(C–CuFe_(2)O_(4))was synthesized by a simple two-step hydrothermal method,which showed enhanced tetracycline hydrochloride(TCH)removal efficiency as compared to the pure CuFe_(2)O_(4) in Fe...Carbon-doped copper ferrite(C–CuFe_(2)O_(4))was synthesized by a simple two-step hydrothermal method,which showed enhanced tetracycline hydrochloride(TCH)removal efficiency as compared to the pure CuFe_(2)O_(4) in Fenton-like reaction.A removal efficiency of 94%was achieved with 0.2 g L^(-1) catalyst and 20 mmol L^(-1) H_(2)O_(2) within 90 min.We demonstrated that 5%C–CuFe_(2)O_(4) catalyst in the presence of H_(2)O_(2) was significantly efficient for TCH degradation under the near-neutral pH(5–9)without buffer.Multiple techniques,including SEM,TEM,XRD,FTIR,Raman,XPS M€ossbauer and so on,were conducted to investigate the structures,morphologies and electronic properties of as-prepared samples.The introduction of carbon can effectively accelerate electron transfer by cooperating with Cu and Fe to activate H_(2)O_(2) to generate·OH and·O_(2)^(-).Particularly,theoretical calculations display that the p,p,d orbital hybridization of C,O,Cu and Fe can form C–O–Cu and C–O–Fe bonds,and the electrons on carbon can transfer to metal Cu and Fe along the C–O–Fe and C–O–Cu channels,thus forming electron-rich reactive centers around Fe and Cu.This work provides lightful reference for the modification of spinel ferrites in Fenton-like application.展开更多
目的探讨肺动脉血管造影(CTPA)在评估急性肺栓塞(APE)患者右心功能变化的临床应用价值。方法检索Pubmed、Embase、Web of Science、Cochrane、万方、维普和中国知网等数据库中关于CTPA分析APE患者右心功能的临床对照研究,时限为2000年1...目的探讨肺动脉血管造影(CTPA)在评估急性肺栓塞(APE)患者右心功能变化的临床应用价值。方法检索Pubmed、Embase、Web of Science、Cochrane、万方、维普和中国知网等数据库中关于CTPA分析APE患者右心功能的临床对照研究,时限为2000年1月至2023年2月。文献筛选后,以纽卡斯尔-渥太华量表(NOS)评估文献质量,Review Manager 5.4软件进行meta分析。结果与无APE患者相比,APE患者右心室与左心室最大直径比(RVd/LVd)(SMD=1.25,95%CI:0.94~1.56,P<0.05)、右心室与左心室最大截面积比(SMD=0.80,95%CI:0.71~0.89,P<0.05)、右心室与左心室容积比(SMD=1.42,95%CI:0.44~2.40,P<0.05)和右心室与左心室之间的最大距离比(SMD=0.91,95%CI:0.57~1.25,P<0.05)均明显增大。中央型APE患者RVd/LVd明显高于周围型APE患者(SMD=1.73,95%CI:0.95~2.51,P<0.05)。结论CTPA对APE右心功能情况具有良好的评估价值。展开更多
目的比较拉米呋定与乙肝疫苗方案预防乙型肝炎核心抗体(hepatitis B core antibody,HBcAb)阳性供肝儿童肝移植术后新发乙型肝炎病毒(hepatitis B virus,HBV)感染效果。方法对天津市第一中心医院自2013年5月—2019年6月251例接受HBcAb阳...目的比较拉米呋定与乙肝疫苗方案预防乙型肝炎核心抗体(hepatitis B core antibody,HBcAb)阳性供肝儿童肝移植术后新发乙型肝炎病毒(hepatitis B virus,HBV)感染效果。方法对天津市第一中心医院自2013年5月—2019年6月251例接受HBcAb阳性供肝儿童肝移植的资料进行回顾性分析,依据采用预防方案的不同分为拉米呋定组和乙肝疫苗组,对两组患儿的新发乙肝病毒感染情况以及临床资料进行比较分析。结果拉米呋定组45例和乙肝疫苗组206例,两组在供受者的临床特征方面无显著差异,两组的新发乙肝病毒感染例数分别为5例(11.1%)和10例(4.9%),发生率无显著统计意义(P=0.075),停用拉米呋定与新发乙肝存在关系。结论单用拉米呋定和乙肝疫苗均是有效预防HBcAb阳性供肝术后新发乙肝的方案,停用拉米呋定会增加新发乙肝的风险。展开更多
基金supported by the Program for the National Natural Science Foundation of China(52070077,51879101,51779090)the National Program for Support of Top-Notch Young Professionals of China(2014)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University(IRT-13R17)Natural Science Foundation of Hunan Province(2022JJ20013,2021JJ40098).
文摘Carbon-doped copper ferrite(C–CuFe_(2)O_(4))was synthesized by a simple two-step hydrothermal method,which showed enhanced tetracycline hydrochloride(TCH)removal efficiency as compared to the pure CuFe_(2)O_(4) in Fenton-like reaction.A removal efficiency of 94%was achieved with 0.2 g L^(-1) catalyst and 20 mmol L^(-1) H_(2)O_(2) within 90 min.We demonstrated that 5%C–CuFe_(2)O_(4) catalyst in the presence of H_(2)O_(2) was significantly efficient for TCH degradation under the near-neutral pH(5–9)without buffer.Multiple techniques,including SEM,TEM,XRD,FTIR,Raman,XPS M€ossbauer and so on,were conducted to investigate the structures,morphologies and electronic properties of as-prepared samples.The introduction of carbon can effectively accelerate electron transfer by cooperating with Cu and Fe to activate H_(2)O_(2) to generate·OH and·O_(2)^(-).Particularly,theoretical calculations display that the p,p,d orbital hybridization of C,O,Cu and Fe can form C–O–Cu and C–O–Fe bonds,and the electrons on carbon can transfer to metal Cu and Fe along the C–O–Fe and C–O–Cu channels,thus forming electron-rich reactive centers around Fe and Cu.This work provides lightful reference for the modification of spinel ferrites in Fenton-like application.
文摘目的探讨肺动脉血管造影(CTPA)在评估急性肺栓塞(APE)患者右心功能变化的临床应用价值。方法检索Pubmed、Embase、Web of Science、Cochrane、万方、维普和中国知网等数据库中关于CTPA分析APE患者右心功能的临床对照研究,时限为2000年1月至2023年2月。文献筛选后,以纽卡斯尔-渥太华量表(NOS)评估文献质量,Review Manager 5.4软件进行meta分析。结果与无APE患者相比,APE患者右心室与左心室最大直径比(RVd/LVd)(SMD=1.25,95%CI:0.94~1.56,P<0.05)、右心室与左心室最大截面积比(SMD=0.80,95%CI:0.71~0.89,P<0.05)、右心室与左心室容积比(SMD=1.42,95%CI:0.44~2.40,P<0.05)和右心室与左心室之间的最大距离比(SMD=0.91,95%CI:0.57~1.25,P<0.05)均明显增大。中央型APE患者RVd/LVd明显高于周围型APE患者(SMD=1.73,95%CI:0.95~2.51,P<0.05)。结论CTPA对APE右心功能情况具有良好的评估价值。
文摘目的比较拉米呋定与乙肝疫苗方案预防乙型肝炎核心抗体(hepatitis B core antibody,HBcAb)阳性供肝儿童肝移植术后新发乙型肝炎病毒(hepatitis B virus,HBV)感染效果。方法对天津市第一中心医院自2013年5月—2019年6月251例接受HBcAb阳性供肝儿童肝移植的资料进行回顾性分析,依据采用预防方案的不同分为拉米呋定组和乙肝疫苗组,对两组患儿的新发乙肝病毒感染情况以及临床资料进行比较分析。结果拉米呋定组45例和乙肝疫苗组206例,两组在供受者的临床特征方面无显著差异,两组的新发乙肝病毒感染例数分别为5例(11.1%)和10例(4.9%),发生率无显著统计意义(P=0.075),停用拉米呋定与新发乙肝存在关系。结论单用拉米呋定和乙肝疫苗均是有效预防HBcAb阳性供肝术后新发乙肝的方案,停用拉米呋定会增加新发乙肝的风险。
