慢性乙型肝炎(chronic hepatitis B,CHB)是全球性的公共卫生问题,我国是CHB危害最为严重的国家之一。母婴传播是乙肝病毒(hepatitis B virus,HBV)感染的重要途径,治疗和阻断孕期HBV传播是降低HBV感染及CHB患病率的重要手段。本文从妊娠...慢性乙型肝炎(chronic hepatitis B,CHB)是全球性的公共卫生问题,我国是CHB危害最为严重的国家之一。母婴传播是乙肝病毒(hepatitis B virus,HBV)感染的重要途径,治疗和阻断孕期HBV传播是降低HBV感染及CHB患病率的重要手段。本文从妊娠期CHB的治疗现状入手,综述了国内外妊娠期CHB抗病毒治疗药物、治疗病毒载量阈值及治疗时机选择,并对妊娠期CHB的治疗新希望提出展望。展开更多
Good ignition-proof principle and mechanical properties were realized in Mg-Y-Ca-Zr alloy system.By adding Y and Ca elements,the ignition point of Mg-3.5Y-0.8Ca alloy was improved to over 1173 K,and the alloy could be...Good ignition-proof principle and mechanical properties were realized in Mg-Y-Ca-Zr alloy system.By adding Y and Ca elements,the ignition point of Mg-3.5Y-0.8Ca alloy was improved to over 1173 K,and the alloy could be melted in air without any protections.The ef-fect of Zr addition on the microstructures and mechanical properties of Mg-3.5Y-0.8Ca alloys were investigated,and Mg-3.5%Y-0.8%Ca-0.4%Zr alloy had good comprehensive properties with tensile strength of 190 MPa and elongation of 11%.Auger electron spectros-copy（AES） and X-ray diffraction（XRD） analysis revealed that the oxide film formed on the surface of Mg-3.5Y-0.8Ca alloy was mainly composed of Y2O3.Thermogravimetric measurements in dry air indicated that the oxidation dynamics curves measured at 773,873 and 973 K followed the cubic law.Moreover,the semiconductor characteristic of Y2O3 film and its effect on ignition-proof properties of Magnesium al-loys were discussed from the viewpoint of electrochemistry.展开更多
文摘慢性乙型肝炎(chronic hepatitis B,CHB)是全球性的公共卫生问题,我国是CHB危害最为严重的国家之一。母婴传播是乙肝病毒(hepatitis B virus,HBV)感染的重要途径,治疗和阻断孕期HBV传播是降低HBV感染及CHB患病率的重要手段。本文从妊娠期CHB的治疗现状入手,综述了国内外妊娠期CHB抗病毒治疗药物、治疗病毒载量阈值及治疗时机选择,并对妊娠期CHB的治疗新希望提出展望。
基金Project supported by the National Natural Science Foundation of China (50901048,51174143)the fund of the State Key Laboratory of Solidification Processing in NWPU (SKLSP201003)+1 种基金Program for Changjiang Scholar and Innovative Research Team in University (IRT0972)Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi and Natural Science Foundation of Shanxi (2010021022-5)
文摘Good ignition-proof principle and mechanical properties were realized in Mg-Y-Ca-Zr alloy system.By adding Y and Ca elements,the ignition point of Mg-3.5Y-0.8Ca alloy was improved to over 1173 K,and the alloy could be melted in air without any protections.The ef-fect of Zr addition on the microstructures and mechanical properties of Mg-3.5Y-0.8Ca alloys were investigated,and Mg-3.5%Y-0.8%Ca-0.4%Zr alloy had good comprehensive properties with tensile strength of 190 MPa and elongation of 11%.Auger electron spectros-copy（AES） and X-ray diffraction（XRD） analysis revealed that the oxide film formed on the surface of Mg-3.5Y-0.8Ca alloy was mainly composed of Y2O3.Thermogravimetric measurements in dry air indicated that the oxidation dynamics curves measured at 773,873 and 973 K followed the cubic law.Moreover,the semiconductor characteristic of Y2O3 film and its effect on ignition-proof properties of Magnesium al-loys were discussed from the viewpoint of electrochemistry.
