The whole melting curve of iron ore during sintering process was obtained,and the melting characteristics of iron ore were defined and explained. The whole melting process of mixture,mixed by iron ore and CaO reagent ...The whole melting curve of iron ore during sintering process was obtained,and the melting characteristics of iron ore were defined and explained. The whole melting process of mixture,mixed by iron ore and CaO reagent at basicity of 2.0 and 4.0,respectively,was observed using a SiC heating furnace with camcorder unit,and the melting curves of mixture that were relative height vs temperature curves were obtained. Besides,the melting characteristics of iron ore during sintering were introduced through defining some points in the melting curves,such as liquid forming temperature,inflexion temperature and flowing temperature,and the meaning of different shapes of the melting curves was clarified.展开更多
该研究旨在建立快速、敏感和特异的检测类猪圆环病毒因子P1的SYBR Green Ⅰ荧光定量PCR法,用于P1的早期诊断。以感染P1的猪血清DNA提取物为模板,采用PCR扩增P1 101 bp的基因片段,将其克隆至pMD18-T载体,重组质粒测序并进行同源性分析;...该研究旨在建立快速、敏感和特异的检测类猪圆环病毒因子P1的SYBR Green Ⅰ荧光定量PCR法,用于P1的早期诊断。以感染P1的猪血清DNA提取物为模板,采用PCR扩增P1 101 bp的基因片段,将其克隆至pMD18-T载体,重组质粒测序并进行同源性分析;以阳性质粒为模板,建立SYBR Green Ⅰ荧光定量PCR检测方法,并进行敏感性和特异性检测。经测序证实扩增片段属于P1,所建立的SYBR Green Ⅰ荧光定量PCR检测P1的反应在101-108拷贝/μL之间具有良好的线性关系,反应的检出下限为10拷贝/μL,而对猪伪狂犬病病毒、猪细小病毒、猪繁殖与呼吸综合征病毒等的检测为阴性,表明该方法敏感、特异。成功建立了SYBR Green Ⅰ荧光定量PCR检测P1载量的方法,为P1致病机制和机体免疫保护机制的研究提供了技术平台。展开更多
为建立山羊痘病毒(goat pox virus,GPV)的SYBR Green I荧光PCR方法,根据GPV的反向末端重复序列(Inverted Terminal Repeat,ITR)的核苷酸序列设计引物。以此引物和山羊痘皮肤痘疹提取的DNA为模板,建立并优化SYBR Green I模式荧光PCR检测...为建立山羊痘病毒(goat pox virus,GPV)的SYBR Green I荧光PCR方法,根据GPV的反向末端重复序列(Inverted Terminal Repeat,ITR)的核苷酸序列设计引物。以此引物和山羊痘皮肤痘疹提取的DNA为模板,建立并优化SYBR Green I模式荧光PCR检测GPV的ITR基因的方法,并与普通PCR方法进行敏感性比较。结果表明,此次建立的检测GPV的SYBR Green I荧光PCR方法能检测出7×102拷贝数的DNA模板,此法比文献报道的普通PCR法更敏感、准确、快速。展开更多
基金Item Sponsored by National Key Fundamental Research and Development Project of China (2006BAE03A01)
文摘The whole melting curve of iron ore during sintering process was obtained,and the melting characteristics of iron ore were defined and explained. The whole melting process of mixture,mixed by iron ore and CaO reagent at basicity of 2.0 and 4.0,respectively,was observed using a SiC heating furnace with camcorder unit,and the melting curves of mixture that were relative height vs temperature curves were obtained. Besides,the melting characteristics of iron ore during sintering were introduced through defining some points in the melting curves,such as liquid forming temperature,inflexion temperature and flowing temperature,and the meaning of different shapes of the melting curves was clarified.
文摘该研究旨在建立快速、敏感和特异的检测类猪圆环病毒因子P1的SYBR Green Ⅰ荧光定量PCR法,用于P1的早期诊断。以感染P1的猪血清DNA提取物为模板,采用PCR扩增P1 101 bp的基因片段,将其克隆至pMD18-T载体,重组质粒测序并进行同源性分析;以阳性质粒为模板,建立SYBR Green Ⅰ荧光定量PCR检测方法,并进行敏感性和特异性检测。经测序证实扩增片段属于P1,所建立的SYBR Green Ⅰ荧光定量PCR检测P1的反应在101-108拷贝/μL之间具有良好的线性关系,反应的检出下限为10拷贝/μL,而对猪伪狂犬病病毒、猪细小病毒、猪繁殖与呼吸综合征病毒等的检测为阴性,表明该方法敏感、特异。成功建立了SYBR Green Ⅰ荧光定量PCR检测P1载量的方法,为P1致病机制和机体免疫保护机制的研究提供了技术平台。
文摘为建立山羊痘病毒(goat pox virus,GPV)的SYBR Green I荧光PCR方法,根据GPV的反向末端重复序列(Inverted Terminal Repeat,ITR)的核苷酸序列设计引物。以此引物和山羊痘皮肤痘疹提取的DNA为模板,建立并优化SYBR Green I模式荧光PCR检测GPV的ITR基因的方法,并与普通PCR方法进行敏感性比较。结果表明,此次建立的检测GPV的SYBR Green I荧光PCR方法能检测出7×102拷贝数的DNA模板,此法比文献报道的普通PCR法更敏感、准确、快速。
文摘该研究旨在建立一种快速、敏感和特异性检测新型鸭呼肠孤病毒（Novel duck reovirus,NDRV）的荧光定量PCR诊断方法。本实验以感染新型鸭呼肠孤病毒的鸭组织RNA提取物为模板,根据Gen Bank数据库中呼肠孤病毒S1基因全序列,设计合成了一对特异性引物,PCR扩增基因片段,将其克隆至p ET-30a载体,重组质粒测序并进行同源性分析;以阳性质粒为模板,建立SYBR Green II荧光定量PCR检测方法,并进行敏感性和特异性检测。经测序证实扩增片段与预期目的片段相符,所建立的SYBR Green II荧光定量PCR检测S1的反应在101～108 copies/u L之间具有良好的线性关系,反应的检出下限为10 copies/μL,而H5型禽流感病毒、H9型禽流感病毒、鸡传染性支气管炎病毒、C型鸭肝炎病毒、新城疫病毒、鹅细小病毒、鸭瘟病毒等病毒的检测为阴性,表明该方法敏感、特异。本研究成功建立了SYBR Green II荧光定量PCR检测新型鸭呼肠孤病毒的方法,为新型鸭呼肠孤病毒致病机制和机体免疫保护机制的研究提供了技术平台。
