Mg-0.5Sn-0.5Mn-0.5Ca(wt.%) alloys with different microstructures are designed through casting and extrusion with and without homogenization treatment prior to extrusion(HPE).The influence of HPE treatment on the micro...Mg-0.5Sn-0.5Mn-0.5Ca(wt.%) alloys with different microstructures are designed through casting and extrusion with and without homogenization treatment prior to extrusion(HPE).The influence of HPE treatment on the microstructural characteristics and resultant discharge properties of Mg-Sn-Mn-Ca alloy in extruded condition as anode for Mg-air battery was investigated.HPE treatment exerts a prominent effect on the grain structure and orientation,distribution of the second phase particles as well as the dislocation density of the extruded alloy.The HPE alloy exhibits a distinctly high cell voltage together with specific energy compared with that of Non-HPE one.Intermittent discharge tests confirm that the HPE alloy possesses a more excellent discharge activity and more stable discharge process than the NonHPE one.All results demonstrate that the HPE alloy is an attractive anode material for Mg-air battery with long-term storage and under intermittent discharge.展开更多
The factors affecting case detection of tuber-culosis(TB)/human immunodeficiency virus(HIV)co-infection cases were explored in order to provide evidence-based formulation of a TB/HIV co-infection control strategy in Ch...The factors affecting case detection of tuber-culosis(TB)/human immunodeficiency virus(HIV)co-infection cases were explored in order to provide evidence-based formulation of a TB/HIV co-infection control strategy in China.Four counties with different modes of HIV transmission and varying cooperation mechanisms between TB and HIV institutions were selected.HIV test among TB patients and TB examination among people living with HIV/acquired immunodeficiency syndrome(AIDS)were conducted.Patients also completed ques-tionnaires on potential factors affecting TB/HIV co-infection.The results showed that 19(1.7%)were HIV-positive among 1089 cases of people living with active TB who received HIV testing.Conversely,there were 126(10%)cases of active TB among 1255 cases of people living with HIV/AIDS.Among the newly discovered 145 cases of TB/HIV co-infection,AIDS institutions found 86.9%of these co-infections and 14.1%came from TB institutes.In different registration categories,there were 31(21.4%)cases of smear positive TB,104(71.7%)cases of smear negative TB,and extrapulmonary cases accounted for 10(6.9%).Gender,occupation,marital status,ethnic group,education,HIV transmission route,CD4 level,and type of TB susceptible symptoms had significant effects on whether HIV/AIDS patients were co-infected with TB disease(P<0.01).Sex,age,ethnic group,occupation,and type of tuberculosis had no significant influence on whether TB patients had HIV infection.AIDS institutions couldfind more TB/HIV co-infection patients in compar-ison with TB institutions,particularly in patients with smear negative pulmonary tuberculosis and extrapulmon-ary tuberculosis.Therefore,a cooperation mechanism should be built up between TB and HIV control systems,and routine TB checks should be conducted for HIV/AIDS patients.In areas where sex or drug use is the major transmission mode of HIV infection,antiretroviral therapy should be expanded,treatment adherence should be improved and patients’immunity level should be increased in order to decrease TB incidence.Cough and expectora-tion of more than two weeks,bloody sputum,and recurrent fevers could be revealing symptoms in TB screening of HIV/AIDS patients.展开更多
基金jointly supported by the National Natural Science Foundation of China(Grant Nos.:51704209,51701060)Natural Science Foundation of Shanxi Province(Grant No.:201801D121088)+2 种基金Shanxi Province Science Foundation for Youths(Grant No.:2016021063)Shanxi Scholarship Council of China(Grant No.:2019032)the Science and Technology Major Project of Shanxi Province(Grant Nos.:20191102008,20191102007)。
文摘Mg-0.5Sn-0.5Mn-0.5Ca(wt.%) alloys with different microstructures are designed through casting and extrusion with and without homogenization treatment prior to extrusion(HPE).The influence of HPE treatment on the microstructural characteristics and resultant discharge properties of Mg-Sn-Mn-Ca alloy in extruded condition as anode for Mg-air battery was investigated.HPE treatment exerts a prominent effect on the grain structure and orientation,distribution of the second phase particles as well as the dislocation density of the extruded alloy.The HPE alloy exhibits a distinctly high cell voltage together with specific energy compared with that of Non-HPE one.Intermittent discharge tests confirm that the HPE alloy possesses a more excellent discharge activity and more stable discharge process than the NonHPE one.All results demonstrate that the HPE alloy is an attractive anode material for Mg-air battery with long-term storage and under intermittent discharge.
文摘The factors affecting case detection of tuber-culosis(TB)/human immunodeficiency virus(HIV)co-infection cases were explored in order to provide evidence-based formulation of a TB/HIV co-infection control strategy in China.Four counties with different modes of HIV transmission and varying cooperation mechanisms between TB and HIV institutions were selected.HIV test among TB patients and TB examination among people living with HIV/acquired immunodeficiency syndrome(AIDS)were conducted.Patients also completed ques-tionnaires on potential factors affecting TB/HIV co-infection.The results showed that 19(1.7%)were HIV-positive among 1089 cases of people living with active TB who received HIV testing.Conversely,there were 126(10%)cases of active TB among 1255 cases of people living with HIV/AIDS.Among the newly discovered 145 cases of TB/HIV co-infection,AIDS institutions found 86.9%of these co-infections and 14.1%came from TB institutes.In different registration categories,there were 31(21.4%)cases of smear positive TB,104(71.7%)cases of smear negative TB,and extrapulmonary cases accounted for 10(6.9%).Gender,occupation,marital status,ethnic group,education,HIV transmission route,CD4 level,and type of TB susceptible symptoms had significant effects on whether HIV/AIDS patients were co-infected with TB disease(P<0.01).Sex,age,ethnic group,occupation,and type of tuberculosis had no significant influence on whether TB patients had HIV infection.AIDS institutions couldfind more TB/HIV co-infection patients in compar-ison with TB institutions,particularly in patients with smear negative pulmonary tuberculosis and extrapulmon-ary tuberculosis.Therefore,a cooperation mechanism should be built up between TB and HIV control systems,and routine TB checks should be conducted for HIV/AIDS patients.In areas where sex or drug use is the major transmission mode of HIV infection,antiretroviral therapy should be expanded,treatment adherence should be improved and patients’immunity level should be increased in order to decrease TB incidence.Cough and expectora-tion of more than two weeks,bloody sputum,and recurrent fevers could be revealing symptoms in TB screening of HIV/AIDS patients.
