Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films.Through comparative experiments,nan...Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films.Through comparative experiments,nanopores are found in the anodic films formed in the electrolytes after high-temperature storage(HTS)at 130°C for 240 h.A comparison of the voltage-time curves suggests that the formation of nanopores results from the decrease in formation efficiency of anodic oxide films rather than the corrosion of the electrolytes.FT-IR and UV spectra analysis shows that carboxylate and ethylene glycol in electrolytes can easily react by esterification at high temperatures.Combining the electronic current theory and oxygen bubble mold effect,the change in electrolyte composition could increase the electronic current in the anodizing process.The electronic current decreases the formation efficiency of anodic oxide films,and oxygen bubbles accompanying electronic current lead to the formation of nanopores in the dense films.The continuous electronic current and oxygen bubbles are the prerequisites for the formation of porous anodic oxides rather than the traditional field-assisted dissolution model.展开更多
目的：对广西壮族自治区基层医疗机构全科医生专业技能需求进行调查以提高全科医生专业技术水平、整体素质和服务能力。方法通过自行设计调查问卷及个人访谈，对农村乡镇卫生院和城市社区卫生服务中心全科医生的专业技能进行调查，并对...目的：对广西壮族自治区基层医疗机构全科医生专业技能需求进行调查以提高全科医生专业技术水平、整体素质和服务能力。方法通过自行设计调查问卷及个人访谈，对农村乡镇卫生院和城市社区卫生服务中心全科医生的专业技能进行调查，并对评价指标进行统计分析。结果广西壮族自治区基层医疗机构的全科医生以大专学历、低职称、中青年为主；2％、22％、26％医生认为“利用卫生信息指导社区工作”“教学能力”“相应科研能力”不属于全科医生专业技能的需求范畴；＞30岁、大专及以上、中职及以上人员教学能力和相应科研能力优于20～30岁、中专、初级职称医生（χ^2＝12．886、1．945、57．473、53．276、30．458、29．141，均 P ＜0．05）。结论对广西壮族自治区基层医疗机构全科医生应重视继续医学教育，建立健全全科医生制度，建立健全双向转诊制度，加强全科医生对教学与科研工作的重视。展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51777097,51577093)。
文摘Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films.Through comparative experiments,nanopores are found in the anodic films formed in the electrolytes after high-temperature storage(HTS)at 130°C for 240 h.A comparison of the voltage-time curves suggests that the formation of nanopores results from the decrease in formation efficiency of anodic oxide films rather than the corrosion of the electrolytes.FT-IR and UV spectra analysis shows that carboxylate and ethylene glycol in electrolytes can easily react by esterification at high temperatures.Combining the electronic current theory and oxygen bubble mold effect,the change in electrolyte composition could increase the electronic current in the anodizing process.The electronic current decreases the formation efficiency of anodic oxide films,and oxygen bubbles accompanying electronic current lead to the formation of nanopores in the dense films.The continuous electronic current and oxygen bubbles are the prerequisites for the formation of porous anodic oxides rather than the traditional field-assisted dissolution model.
文摘目的：对广西壮族自治区基层医疗机构全科医生专业技能需求进行调查以提高全科医生专业技术水平、整体素质和服务能力。方法通过自行设计调查问卷及个人访谈，对农村乡镇卫生院和城市社区卫生服务中心全科医生的专业技能进行调查，并对评价指标进行统计分析。结果广西壮族自治区基层医疗机构的全科医生以大专学历、低职称、中青年为主；2％、22％、26％医生认为“利用卫生信息指导社区工作”“教学能力”“相应科研能力”不属于全科医生专业技能的需求范畴；＞30岁、大专及以上、中职及以上人员教学能力和相应科研能力优于20～30岁、中专、初级职称医生（χ^2＝12．886、1．945、57．473、53．276、30．458、29．141，均 P ＜0．05）。结论对广西壮族自治区基层医疗机构全科医生应重视继续医学教育，建立健全全科医生制度，建立健全双向转诊制度，加强全科医生对教学与科研工作的重视。
