介绍了La Fe M(M=Al,Si)化合物在磁热性能研究方面的最新进展。具有NaZn13型晶体结构,含高浓度Fe的La Fe M(M=Al,Si)化合物为良好的软磁材料;用少量的Co替代化合物中Si,Al元素可以将化合物的居里温度提高至室温;对La(Fe1-yCoy)xSi13-x...介绍了La Fe M(M=Al,Si)化合物在磁热性能研究方面的最新进展。具有NaZn13型晶体结构,含高浓度Fe的La Fe M(M=Al,Si)化合物为良好的软磁材料;用少量的Co替代化合物中Si,Al元素可以将化合物的居里温度提高至室温;对La(Fe1-yCoy)xSi13-x化合物,适量的Si,Co组合可使化合物在室温产生可与Gd5Si2Ge2比拟的磁热效应;加入适量的间隙原子H,也可使La(FexSi1-x)13在室温的磁热性能远远大于金属Gd;对含Si量低及含Si量高的La(FexSi1-x)13化合物在相转变点附近由温度和磁场诱导相变的本质做了详细阐述。展开更多
采用机械合金化法制备Al V Fe纳米粉末 ,通过测定M ssbauer效应 ,研究了不同球磨能量对制备Al V Fe纳米粉末的影响·结果表明 ,振动球磨与高能球磨所制备的Al V Fe纳米粉末结构均由非晶和α Al纳米晶组成 ,其非晶含量随着球磨能量...采用机械合金化法制备Al V Fe纳米粉末 ,通过测定M ssbauer效应 ,研究了不同球磨能量对制备Al V Fe纳米粉末的影响·结果表明 ,振动球磨与高能球磨所制备的Al V Fe纳米粉末结构均由非晶和α Al纳米晶组成 ,其非晶含量随着球磨能量的增加而有所不同·展开更多
目的探讨组织钙结合蛋白S100Al m RNA和锌指转录因子Snail m RNA检测在卵巢疾病中的临床应用。方法选取2013年3月至2015年3月我院经病理确诊的卵巢病变组织标本共68例,通过RT-PCR技术检测卵巢良性囊腺瘤(良性肿瘤组)、交界性囊腺瘤(交...目的探讨组织钙结合蛋白S100Al m RNA和锌指转录因子Snail m RNA检测在卵巢疾病中的临床应用。方法选取2013年3月至2015年3月我院经病理确诊的卵巢病变组织标本共68例,通过RT-PCR技术检测卵巢良性囊腺瘤(良性肿瘤组)、交界性囊腺瘤(交界性肿瘤组)和卵巢囊腺癌(卵巢癌组)组织S100Al m RNA和Snail m RNA的表达,并测定各组血清癌胚抗原(CEA)、糖类抗原125(CA125)及人附睾分泌蛋白(HE4)水平,比较三组患者以上指标的变化。结果卵巢癌组组织S100Al m RNA和Snail m RNA的表达量与交界性肿瘤组和良性肿瘤组比较明显增高,差异均有显著统计学意义(P<0.01),交界性肿瘤组与良性肿瘤组比较明显增高,差异也有显著统计学意义(P<0.01);卵巢癌和交界性肿瘤组S100Al m RNA和Snail m RNA相对表达量具有相关性(r=0.629、0.571,P<0.01),组织S100Al m RNA和Snail m RNA分别与血清CA125及HE4呈现相关性(r=0.632、0.587,P<0.01;r=0.638、0.617,P<0.01)。结论联合检测组织S100Al m RNA和Snail m RNA在卵巢良性囊腺瘤、交界性囊腺瘤和卵巢囊腺癌病变组织中的表达,可增加卵巢囊腺癌的早期检出率,为上皮性卵巢疾病的鉴别诊断提供新的思路。展开更多
The early precipitation process of Ni(75)Al(14)Mo(11) alloy was simulated by microscopic phase-field model at different temperatures.The microstructure of the alloy,the precipitation time of Llo structure and oc...The early precipitation process of Ni(75)Al(14)Mo(11) alloy was simulated by microscopic phase-field model at different temperatures.The microstructure of the alloy,the precipitation time of Llo structure and occupation probability of the three kinds of atoms were investigated.It is indicated that the non-stoichiometric Ll0(Ⅰ/Ⅱ) phases are found in the precipitation process.With the temperature increasing,the appearance time of Ll0 is brought forward.The Ll0(Ⅱ) structure always precipitates earlier than the Ll0(Ⅰ) structure.Compared with lower temperature,higher temperature brings the formation time of Ll0 phase forward and makes Ll0 phase have a higher order degree.But lower temperature shortens the process time of the Ll0 phase to the Ll2 phase.Al and Mo atoms tend to occupy γ site,Ni atom tends to occupy a and β sites.At the same temperature,Al atom has stronger occupation ability than Mo atom in the same site.Ni,Al and Mo collectively form the composited Ll2 structure.展开更多
文摘介绍了La Fe M(M=Al,Si)化合物在磁热性能研究方面的最新进展。具有NaZn13型晶体结构,含高浓度Fe的La Fe M(M=Al,Si)化合物为良好的软磁材料;用少量的Co替代化合物中Si,Al元素可以将化合物的居里温度提高至室温;对La(Fe1-yCoy)xSi13-x化合物,适量的Si,Co组合可使化合物在室温产生可与Gd5Si2Ge2比拟的磁热效应;加入适量的间隙原子H,也可使La(FexSi1-x)13在室温的磁热性能远远大于金属Gd;对含Si量低及含Si量高的La(FexSi1-x)13化合物在相转变点附近由温度和磁场诱导相变的本质做了详细阐述。
文摘目的探讨组织钙结合蛋白S100Al m RNA和锌指转录因子Snail m RNA检测在卵巢疾病中的临床应用。方法选取2013年3月至2015年3月我院经病理确诊的卵巢病变组织标本共68例,通过RT-PCR技术检测卵巢良性囊腺瘤(良性肿瘤组)、交界性囊腺瘤(交界性肿瘤组)和卵巢囊腺癌(卵巢癌组)组织S100Al m RNA和Snail m RNA的表达,并测定各组血清癌胚抗原(CEA)、糖类抗原125(CA125)及人附睾分泌蛋白(HE4)水平,比较三组患者以上指标的变化。结果卵巢癌组组织S100Al m RNA和Snail m RNA的表达量与交界性肿瘤组和良性肿瘤组比较明显增高,差异均有显著统计学意义(P<0.01),交界性肿瘤组与良性肿瘤组比较明显增高,差异也有显著统计学意义(P<0.01);卵巢癌和交界性肿瘤组S100Al m RNA和Snail m RNA相对表达量具有相关性(r=0.629、0.571,P<0.01),组织S100Al m RNA和Snail m RNA分别与血清CA125及HE4呈现相关性(r=0.632、0.587,P<0.01;r=0.638、0.617,P<0.01)。结论联合检测组织S100Al m RNA和Snail m RNA在卵巢良性囊腺瘤、交界性囊腺瘤和卵巢囊腺癌病变组织中的表达,可增加卵巢囊腺癌的早期检出率,为上皮性卵巢疾病的鉴别诊断提供新的思路。
基金Project(51275486)supported by the National Natural Science Foundation of China
文摘The early precipitation process of Ni(75)Al(14)Mo(11) alloy was simulated by microscopic phase-field model at different temperatures.The microstructure of the alloy,the precipitation time of Llo structure and occupation probability of the three kinds of atoms were investigated.It is indicated that the non-stoichiometric Ll0(Ⅰ/Ⅱ) phases are found in the precipitation process.With the temperature increasing,the appearance time of Ll0 is brought forward.The Ll0(Ⅱ) structure always precipitates earlier than the Ll0(Ⅰ) structure.Compared with lower temperature,higher temperature brings the formation time of Ll0 phase forward and makes Ll0 phase have a higher order degree.But lower temperature shortens the process time of the Ll0 phase to the Ll2 phase.Al and Mo atoms tend to occupy γ site,Ni atom tends to occupy a and β sites.At the same temperature,Al atom has stronger occupation ability than Mo atom in the same site.Ni,Al and Mo collectively form the composited Ll2 structure.