在无有机胺模板剂和不加晶种体系中,采用较低晶化温度(130℃),在水热体系中一步合成了形貌均一的板块状高硅ZSM-5沸石(nSiO2/nAl2O3>90)。系统地考察了合成体系中原料的物质的量之比对合成ZSM-5沸石的影响。通过X射线衍射(XRD),傅里...在无有机胺模板剂和不加晶种体系中,采用较低晶化温度(130℃),在水热体系中一步合成了形貌均一的板块状高硅ZSM-5沸石(nSiO2/nAl2O3>90)。系统地考察了合成体系中原料的物质的量之比对合成ZSM-5沸石的影响。通过X射线衍射(XRD),傅里叶红外光谱(FT-IR),扫描电镜(SEM),低温氮气吸附/脱附和固体核磁共振(29Si MAS NMR)等技术手段对合成的ZSM-5沸石进行了物化表征。结果表明,当原料的物质的量之比nC2H5OH/nSiO2=2.8、nNa2O/nSiO2=0.14和nSiO2/nAl2O3=150时,可合成具有高结晶度的ZSM-5纯相沸石。比表面积和微孔孔容分别为409 m^2·g^-1和0.14 cm^3·g^-1,其骨架nSiO2/nAl2O3达到96.4。展开更多
Background Stable angina pectoris is a common subtype of coronary heart disease.Patients suffer from chest tightness,chest pain and crushing pain under the inducement of fatigue and emotional agitation.This study aims...Background Stable angina pectoris is a common subtype of coronary heart disease.Patients suffer from chest tightness,chest pain and crushing pain under the inducement of fatigue and emotional agitation.This study aims to investigate the effect of exercise training guidance based on action research on exercise endurance and readmission rate of patients with stable angina pectoris.Methods A retrospective study was conducted on 60 patients with stable angina pectoris due to coronary heart disease admitted to our hospital from February 2020 to November 2023.Patients were divided into a control group of 29 cases(receiving conventional exercise training guidance)and a guidance group of 31 cases(receiving action research-based exercise training guidance).Both groups received continuous training for one month.A comparison was made between the exercise endurance indicators[6-minute walk test distance(6MWT),peak oxygen consumption(peak VO2),anaerobic threshold(AT),exercise duration(ED)],quality of life,and readmission rate within 6 months after intervention in both groups.Results After 1 month of intervention,6MWT,peak VO2,AT and ED were increased in both groups,and those in the guidance group were higher than those in the conventional group(P<0.05).The score of quality of life(The 36-item shot-form health status survey,SF-36)in both groups was increased,and the guidance group scored higher than the conventional group(P<0.05).The readmission rate of patients in the guidance group was 6.45%,which was lower than that in the conventional group(27.59%)(P<0.05).Conclusions The application of action research-based exercise training guidance in patients with stable angina pectoris due to coronary heart disease has significant effects,improving exercise endurance,significantly improving quality of life,and reducing readmission rate,thus having practical value.[S Chin J Cardiol 2024;25(3):162-168]展开更多
文摘在无有机胺模板剂和不加晶种体系中,采用较低晶化温度(130℃),在水热体系中一步合成了形貌均一的板块状高硅ZSM-5沸石(nSiO2/nAl2O3>90)。系统地考察了合成体系中原料的物质的量之比对合成ZSM-5沸石的影响。通过X射线衍射(XRD),傅里叶红外光谱(FT-IR),扫描电镜(SEM),低温氮气吸附/脱附和固体核磁共振(29Si MAS NMR)等技术手段对合成的ZSM-5沸石进行了物化表征。结果表明,当原料的物质的量之比nC2H5OH/nSiO2=2.8、nNa2O/nSiO2=0.14和nSiO2/nAl2O3=150时,可合成具有高结晶度的ZSM-5纯相沸石。比表面积和微孔孔容分别为409 m^2·g^-1和0.14 cm^3·g^-1,其骨架nSiO2/nAl2O3达到96.4。
文摘Background Stable angina pectoris is a common subtype of coronary heart disease.Patients suffer from chest tightness,chest pain and crushing pain under the inducement of fatigue and emotional agitation.This study aims to investigate the effect of exercise training guidance based on action research on exercise endurance and readmission rate of patients with stable angina pectoris.Methods A retrospective study was conducted on 60 patients with stable angina pectoris due to coronary heart disease admitted to our hospital from February 2020 to November 2023.Patients were divided into a control group of 29 cases(receiving conventional exercise training guidance)and a guidance group of 31 cases(receiving action research-based exercise training guidance).Both groups received continuous training for one month.A comparison was made between the exercise endurance indicators[6-minute walk test distance(6MWT),peak oxygen consumption(peak VO2),anaerobic threshold(AT),exercise duration(ED)],quality of life,and readmission rate within 6 months after intervention in both groups.Results After 1 month of intervention,6MWT,peak VO2,AT and ED were increased in both groups,and those in the guidance group were higher than those in the conventional group(P<0.05).The score of quality of life(The 36-item shot-form health status survey,SF-36)in both groups was increased,and the guidance group scored higher than the conventional group(P<0.05).The readmission rate of patients in the guidance group was 6.45%,which was lower than that in the conventional group(27.59%)(P<0.05).Conclusions The application of action research-based exercise training guidance in patients with stable angina pectoris due to coronary heart disease has significant effects,improving exercise endurance,significantly improving quality of life,and reducing readmission rate,thus having practical value.[S Chin J Cardiol 2024;25(3):162-168]
