The γ/γ' microstructure of a Re-containing Ni-based single crystal super alloy after a two-step aging was studied using scanning electron microscopy (SEM),transmission electron microscopy (TEM) and scanning tra...The γ/γ' microstructure of a Re-containing Ni-based single crystal super alloy after a two-step aging was studied using scanning electron microscopy (SEM),transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM).The crystals were grown by the floating zone (FZ) method.Both cuboidal and spherical γ' precipitates were formed after a two-step aging.The size of the cuboidal γ' phases first increased and then decreased with the extension of the second-step aging time.Re,Co and Cr strongly concentrated in the γ phase whereas Ni and Al enriched in the γ' phase.Thermodynamic calculation by JMatPro was performed to explain the experimental observations.展开更多
目的观察脾氨肽联合盐酸丙卡特罗治疗小儿支气管哮喘的疗效及对患儿血清白细胞介素-4(interleukin-4,IL-4)、γ干扰素(interferon-γ,IFN-γ)水平的影响。方法以100例哮喘患儿为研究对象,用随机数字表法分为对照组(50例)和联合组(50例)...目的观察脾氨肽联合盐酸丙卡特罗治疗小儿支气管哮喘的疗效及对患儿血清白细胞介素-4(interleukin-4,IL-4)、γ干扰素(interferon-γ,IFN-γ)水平的影响。方法以100例哮喘患儿为研究对象,用随机数字表法分为对照组(50例)和联合组(50例)。对照组给予盐酸丙卡特罗治疗,联合组在对照组治疗的基础上加用脾氨肽。比较2组的疗效、临床症状消失时间、治疗前后血清学指标(IgG、IgM、IgA、IL-4、IFN-γ)和肺功能指标[第1秒用力呼气量(forced expiratory volume in first second,FEV_(1))占预计值的百分比、用力肺活量(forced vital capacity,FVC)和FEV_(1)/FVC值]、药物不良反应及哮喘复发情况。结果联合组的总有效率高于对照组(P<0.05)。联合组咳嗽消失时间、喘憋消失时间、哮鸣音消失时间、胸闷消失时间和呼吸困难消失时间较对照组均明显缩短(P<0.05)。2组IgG、IgM、IgA和IFN-γ较治疗前均明显增高,且联合组明显高于对照组;IL-4较治疗前明显降低,且联合组明显低于对照组(P<0.05)。2组FEV_(1)占预计值的百分比和FEV_(1)/FVC值较治疗前明显增高,联合组明显高于对照组(P<0.05)。联合组哮喘复发次数较对照组明显减少(P<0.05)。结论脾氨肽联合盐酸丙卡特罗治疗可提高哮喘患儿的临床疗效,在改善患儿临床症状的同时明显调节免疫功能和肺功能,有效控制哮喘复发。展开更多
基金Project(08dj1400402) supported by the Major Program for the Fundamental Research of Science and Technology Committee of the Shanghai Municipality,ChinaProject(09ZZ16) supported by Innovation Program of Shanghai Municipal Education Committee,China
文摘The γ/γ' microstructure of a Re-containing Ni-based single crystal super alloy after a two-step aging was studied using scanning electron microscopy (SEM),transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM).The crystals were grown by the floating zone (FZ) method.Both cuboidal and spherical γ' precipitates were formed after a two-step aging.The size of the cuboidal γ' phases first increased and then decreased with the extension of the second-step aging time.Re,Co and Cr strongly concentrated in the γ phase whereas Ni and Al enriched in the γ' phase.Thermodynamic calculation by JMatPro was performed to explain the experimental observations.
文摘目的观察脾氨肽联合盐酸丙卡特罗治疗小儿支气管哮喘的疗效及对患儿血清白细胞介素-4(interleukin-4,IL-4)、γ干扰素(interferon-γ,IFN-γ)水平的影响。方法以100例哮喘患儿为研究对象,用随机数字表法分为对照组(50例)和联合组(50例)。对照组给予盐酸丙卡特罗治疗,联合组在对照组治疗的基础上加用脾氨肽。比较2组的疗效、临床症状消失时间、治疗前后血清学指标(IgG、IgM、IgA、IL-4、IFN-γ)和肺功能指标[第1秒用力呼气量(forced expiratory volume in first second,FEV_(1))占预计值的百分比、用力肺活量(forced vital capacity,FVC)和FEV_(1)/FVC值]、药物不良反应及哮喘复发情况。结果联合组的总有效率高于对照组(P<0.05)。联合组咳嗽消失时间、喘憋消失时间、哮鸣音消失时间、胸闷消失时间和呼吸困难消失时间较对照组均明显缩短(P<0.05)。2组IgG、IgM、IgA和IFN-γ较治疗前均明显增高,且联合组明显高于对照组;IL-4较治疗前明显降低,且联合组明显低于对照组(P<0.05)。2组FEV_(1)占预计值的百分比和FEV_(1)/FVC值较治疗前明显增高,联合组明显高于对照组(P<0.05)。联合组哮喘复发次数较对照组明显减少(P<0.05)。结论脾氨肽联合盐酸丙卡特罗治疗可提高哮喘患儿的临床疗效,在改善患儿临床症状的同时明显调节免疫功能和肺功能,有效控制哮喘复发。