论文部分内容阅读
[!--newstext--]
[!--title--]
【摘 要】
：
目的:研究同型半胱氨酸相关酶中亚甲基四氢叶酸还原酶(MTHFR)及蛋氨酸合成酶还原酶(MTRR)基因的多态性与先天神经管缺陷的关系。方法:采用病例对照研究的方法,以64名先天神经
【机 构】
：
解放军208医院妇产科,解放军208医院妇产科,解放军208医院小儿科,北京市妇产医院 吉林长春130062,吉林长春130062
【出 处】
：
中国妇幼保健
【发表日期】
：
2008年13期
其他文献
An elastic-viscoplastic mechanics model is used to investigate asymptotically the mode Ⅲ dynamically propagating crack tip field in elastic-viscoplastic materi
A series of La2O3/MC nylon nanocomposites were prepared via in situ polymerization. The effects of content of nano-La2O3 on the mechanical properties of nanocom
在具体的离散时间不完全市场模型下给出了极小鞅测度的刻划,并以此推导股票期货的无套利定价模型.随后,通过实证对推导出的定价模型加以检验,其结果表明:新定价模型能够较好
基于密度的聚类是聚类分析中的一种,其主要优点是发现任意形状的聚类和对噪音数据不敏感.文章提出了一种新的基于网格密度和空间划分树的CGDSFF(Clustering based on Grid -
Solid lubricants lead to substantial weight savings relative to the use of liquid lubricant, especially in the weight-conscious aerospace industry. A new PTFE-A
Effect of Strain Rate on the Ferrite Grain Refinement in a Low Carbon Nb-Ti Microalloyed Steel durin
Grain refinement is one of the effective methods to develop new generation low carbon microalloyed steels possessing excellent combination of mechanical propert
A novel Enterococcus faecalis strain designated NJ402 was found with high activity of arginine deiminase (ADI). The optimum condition for catalytic activity was
为了得到高维生素C(Vc)含量新品种,克隆和构建了GalUR半乳糖醛酸还原酶基因,并转入了番茄.通过不同转基因突变体GalUR基因表达和Vc含量分析发现:GalUR基因在转GalUR基因番茄
采用反相高效液相色谱法(RP-HPLC),使用YWGC18柱和二极管阵列检测器,以甲醇-水为流动相,检测波长260nm,用外标法测定了福美双·吡虫啉·烯唑醇悬浮种衣剂中3种成分的含量。结
The effects of different contents of rare earth element, and erbium, on the as-cast microstructures of Al-6Zn-2Mg and Al-6Zn-2Mg-1.8Cu alloys were studied by op