目的获得12个Y染色体短串联重复序列（Y chromosome short tandem repeat，Y-STR）位点（DYSl9、DYS389I、DYS389II、DYS390、DYS391、DYS392、DYS393、DYS385a、DYS385b、DYS437、DYS438、DYS439）在宁夏回族群体的多态性分布。方法应用PowerPlex Y荧光标记复合扩增试剂盒，对宁夏回族群体150名无关健康男性个体基因组DNA进行复合扩增，用ABl377测序仪对扩增产物进行检测，统计12个Y-STRs位点群体遗传学参数。结果12个基因座共检测出75个等位基因，频率分布在0．0067～0．7067之间，基因多样性（gene diversity，GD）分布在0．4446～0．8877之间。在150名无关个体中，共有148种不同的单倍型，其中只有两种单倍型分别为两名个体共有，12个Y-STRs位点联合构成的单倍型多样性为0．9864。结论12个Y-STRs基因座在宁夏回族群体具有较强的个体识别能力，可应用于群体遗传学及法医学研究。
MgAl type layered double hydroxide(LDH) obtained by co-precipitation,has been used as precursors to intercalate an antineoplastic agent fluorouracil to prepare an intercalation compound LDH-FLU with ion exchange reaction.The transformation in structure and crystalline state property from LDH to LDH-FLU has been investigated via XRD,FT-IR,TEM,TG-DSC,and BET-N2 surface area characterizations.The results show that the structure of the intercalation compound is homologous to a monolayer parallel pillar-layer interaction model.Compared with LDH,the crystallinity of this compound is enhanced,the proportion of the inter-lamellar constitution H2O is increased,the thermal decomposition of intermediate crystalline phase complicated,the stack order of grains intensified in c axial,the absorbability of micro-pore decreased,and the pore volume of inter-laminar are reduced evidently.
