目的比较DNATyperTM15和IdentifilerTM试剂盒的遗传学调查应用结果,以评价DNATyperTM15试剂盒的指标和性能。方法用DNATyperTM15和IdentifilerTM试剂盒同时对290份北方汉族群体的血样本进行扩增检测,比较遗传学统计数据。结果DNATyperT...目的比较DNATyperTM15和IdentifilerTM试剂盒的遗传学调查应用结果,以评价DNATyperTM15试剂盒的指标和性能。方法用DNATyperTM15和IdentifilerTM试剂盒同时对290份北方汉族群体的血样本进行扩增检测,比较遗传学统计数据。结果DNATyperTM15和IdentifilerTM荧光检测试剂盒中各基因座在汉族群体中的基因型分布均符合Hardy-W e inberg平衡,累积个人识别率和累计非父排除率:DNATyperTM15试剂盒分别为2.66×10-18和0.9999997;IdentifilerTM试剂盒分别为1.28×10-17和0.9999984。且两个试剂盒对相同基因座的频率调查数据一致。结论DNATyperTM15具有较高的个体识别和亲权鉴定能力,对法医学检案和DNA数据库建设具有应用价值。展开更多
A new jatrophane diterpenoid ester （2S, 3S, 4R, 5R, 7S, 8R, 13R, 15R） - 3, 5, 7, 8, 15- pentaacetoxy-9, 14-dioxojatropha-6（17）, 11E-diene was isolated from the whole plant of Euphorbia turczaninowii Kar. ＆ Kit.. ...A new jatrophane diterpenoid ester （2S, 3S, 4R, 5R, 7S, 8R, 13R, 15R） - 3, 5, 7, 8, 15- pentaacetoxy-9, 14-dioxojatropha-6（17）, 11E-diene was isolated from the whole plant of Euphorbia turczaninowii Kar. ＆ Kit.. Its structure was characterized by spectral analysis and confurmed by X-ray crystallographic analysis.展开更多
We describe the optimization and validation of the DNATyper^(TM)15 multiplex polymerase chain reaction(PCR)genotyping system for autosomal short tandem repeat(STR)amplification at 14 autosomal loci(D6S1043,D21S11,D7S8...We describe the optimization and validation of the DNATyper^(TM)15 multiplex polymerase chain reaction(PCR)genotyping system for autosomal short tandem repeat(STR)amplification at 14 autosomal loci(D6S1043,D21S11,D7S820,CSF1PO,D2S1338,D3S1358,D13S317,D8S1179,D16S539,Penta E,D5S818,vWA,D18S51,and FGA)and amelogenin,a sex‑determining locus.Several DNATyper^(TM)15 assay variables were optimized,including hot start Taq polymerase concentration,Taq polymerase activation time,magnesium concentration,primer concentration,annealing temperature,reaction volume,and cycle number.The performance of the assay was validated with respect to species specificity,sensitivity to template concentration,stability,accuracy,influence of the DNA extraction methods,and the ability to genotype the mixture samples.The performance of the DNATyper^(TM)15 system on casework samples was compared with that of two widely used STR amplification kits,Identifiler^(TM)(Applied Biosystems,Carlsbad,CA,USA)and PowerPlex 16®(Promega,Madison,WI,USA).The conditions for PCR‑based DNATyper^(TM)15 genotyping were optimized.Contamination from forensically relevant nonhuman DNA was not found to impact genotyping results,and full profiles were generated for all the reactions containing≥0.125 ng of DNA template.No significant difference in performance was observed even after the DNATyper^(TM)15 assay components were subjected to 20 freeze‑thaw cycles.The performances of DNATyper^(TM)15,Identifiler^(TM),and PowerPlex 16®were comparable in terms of sensitivity and the ability to genotype the mixed samples and case‑type samples,with the assays giving the same genotyping results for all the shared loci.The DNA extraction methods did not affect the performance of any of the systems.Our results demonstrate that the DNATyper^(TM)15 system is suitable for genotyping in both forensic DNA database work and case‑type samples.展开更多
Mammalian follicles are composed of oocytes,granulosa cells,and theca cells.Theca cells form in the secondary follicles,maintaining follicular structural integrity and secreting steroid hormones.Two main sources of th...Mammalian follicles are composed of oocytes,granulosa cells,and theca cells.Theca cells form in the secondary follicles,maintaining follicular structural integrity and secreting steroid hormones.Two main sources of theca cells exist:Wilms tumor 1 positive(Wt1+)cells native to the ovary and Gli1+mesenchymal cells migrated from the mesonephros.Normal folliculogenesis is a process where oocytes,granulosa cells,and theca cells constantly interact with and support each other through autocrine and paracrine mechanisms.The proliferation and differentiation of theca cells are regulated by oocyte-derived factors,including growth development factor 9 and bone morphogenetic protein 15,and granulosa cell-derived factors,including desert hedgehog,Indian hedgehog,kit ligand,insulin-like growth factor 1,as well as hormones such as insulin and growth hormones.Current research on the origin of theca cells is limited.Identifying the origin of theca cells will help us to systematically elaborate the mechanisms of follicular formation and development.展开更多
Highly ordered 2D and 3D-Co3O4 catalysts were prepared using SBA-15 and KIT-6 as templates. Na- no-Co304 catalyst was obtained by calcination of cobalt nitrate as a comparison. The BET surface area of nano- CO304, 2D-...Highly ordered 2D and 3D-Co3O4 catalysts were prepared using SBA-15 and KIT-6 as templates. Na- no-Co304 catalyst was obtained by calcination of cobalt nitrate as a comparison. The BET surface area of nano- CO304, 2D-Co3O4 and 3D-Co3O4 catalysts was 16.2, 63.9 and 75.1 mE/g, respectively. All the catalysts were tested for the total combustion of methane and their catalytic performance was in the order of 3D-Co3O4（T90=355℃）〉 2D-CoaO4（T90=383℃）〉nano-Co3O4（T90=455℃）. It was also found that the order of the areal specific reaction rates for the combustion of methane followed the same order of total activity. The characterization result demonstrates that enhanced catalytic performance of methane of the 2D-Co3O4 and 3D-Co3O4 catalysts is due to their pronounced reducibility and abundant active Co3O4 species, which was caused by the preferential exposure of {220} crystal planes in 3D-Co3O4 and 2D-Co3O4 catalysts compared to the nano-Co3O4.展开更多
文摘目的比较DNATyperTM15和IdentifilerTM试剂盒的遗传学调查应用结果,以评价DNATyperTM15试剂盒的指标和性能。方法用DNATyperTM15和IdentifilerTM试剂盒同时对290份北方汉族群体的血样本进行扩增检测,比较遗传学统计数据。结果DNATyperTM15和IdentifilerTM荧光检测试剂盒中各基因座在汉族群体中的基因型分布均符合Hardy-W e inberg平衡,累积个人识别率和累计非父排除率:DNATyperTM15试剂盒分别为2.66×10-18和0.9999997;IdentifilerTM试剂盒分别为1.28×10-17和0.9999984。且两个试剂盒对相同基因座的频率调查数据一致。结论DNATyperTM15具有较高的个体识别和亲权鉴定能力,对法医学检案和DNA数据库建设具有应用价值。
文摘A new jatrophane diterpenoid ester （2S, 3S, 4R, 5R, 7S, 8R, 13R, 15R） - 3, 5, 7, 8, 15- pentaacetoxy-9, 14-dioxojatropha-6（17）, 11E-diene was isolated from the whole plant of Euphorbia turczaninowii Kar. ＆ Kit.. Its structure was characterized by spectral analysis and confurmed by X-ray crystallographic analysis.
基金the National Science and Technology Supporting Program during the 10th 5‑year plan period(2001BA801B02)。
文摘We describe the optimization and validation of the DNATyper^(TM)15 multiplex polymerase chain reaction(PCR)genotyping system for autosomal short tandem repeat(STR)amplification at 14 autosomal loci(D6S1043,D21S11,D7S820,CSF1PO,D2S1338,D3S1358,D13S317,D8S1179,D16S539,Penta E,D5S818,vWA,D18S51,and FGA)and amelogenin,a sex‑determining locus.Several DNATyper^(TM)15 assay variables were optimized,including hot start Taq polymerase concentration,Taq polymerase activation time,magnesium concentration,primer concentration,annealing temperature,reaction volume,and cycle number.The performance of the assay was validated with respect to species specificity,sensitivity to template concentration,stability,accuracy,influence of the DNA extraction methods,and the ability to genotype the mixture samples.The performance of the DNATyper^(TM)15 system on casework samples was compared with that of two widely used STR amplification kits,Identifiler^(TM)(Applied Biosystems,Carlsbad,CA,USA)and PowerPlex 16®(Promega,Madison,WI,USA).The conditions for PCR‑based DNATyper^(TM)15 genotyping were optimized.Contamination from forensically relevant nonhuman DNA was not found to impact genotyping results,and full profiles were generated for all the reactions containing≥0.125 ng of DNA template.No significant difference in performance was observed even after the DNATyper^(TM)15 assay components were subjected to 20 freeze‑thaw cycles.The performances of DNATyper^(TM)15,Identifiler^(TM),and PowerPlex 16®were comparable in terms of sensitivity and the ability to genotype the mixed samples and case‑type samples,with the assays giving the same genotyping results for all the shared loci.The DNA extraction methods did not affect the performance of any of the systems.Our results demonstrate that the DNATyper^(TM)15 system is suitable for genotyping in both forensic DNA database work and case‑type samples.
基金This work was supported by grants from the National Key Technology R&D Program of China(Nos.2017YFC1002002 and 2018YFC1004001)the National Science Foundation of China(No.81571386)the Special Research Project of Chinese Capital Health Development(No.2018-2-4095).
文摘Mammalian follicles are composed of oocytes,granulosa cells,and theca cells.Theca cells form in the secondary follicles,maintaining follicular structural integrity and secreting steroid hormones.Two main sources of theca cells exist:Wilms tumor 1 positive(Wt1+)cells native to the ovary and Gli1+mesenchymal cells migrated from the mesonephros.Normal folliculogenesis is a process where oocytes,granulosa cells,and theca cells constantly interact with and support each other through autocrine and paracrine mechanisms.The proliferation and differentiation of theca cells are regulated by oocyte-derived factors,including growth development factor 9 and bone morphogenetic protein 15,and granulosa cell-derived factors,including desert hedgehog,Indian hedgehog,kit ligand,insulin-like growth factor 1,as well as hormones such as insulin and growth hormones.Current research on the origin of theca cells is limited.Identifying the origin of theca cells will help us to systematically elaborate the mechanisms of follicular formation and development.
基金Supported by the National Natural Science Foundation of China（No.21373186）.
文摘Highly ordered 2D and 3D-Co3O4 catalysts were prepared using SBA-15 and KIT-6 as templates. Na- no-Co304 catalyst was obtained by calcination of cobalt nitrate as a comparison. The BET surface area of nano- CO304, 2D-Co3O4 and 3D-Co3O4 catalysts was 16.2, 63.9 and 75.1 mE/g, respectively. All the catalysts were tested for the total combustion of methane and their catalytic performance was in the order of 3D-Co3O4（T90=355℃）〉 2D-CoaO4（T90=383℃）〉nano-Co3O4（T90=455℃）. It was also found that the order of the areal specific reaction rates for the combustion of methane followed the same order of total activity. The characterization result demonstrates that enhanced catalytic performance of methane of the 2D-Co3O4 and 3D-Co3O4 catalysts is due to their pronounced reducibility and abundant active Co3O4 species, which was caused by the preferential exposure of {220} crystal planes in 3D-Co3O4 and 2D-Co3O4 catalysts compared to the nano-Co3O4.
