定向的

Objective:To investigate the process of differentiation of adult rat mesenchymal stem cells into neuron-like cells in vitro and the following death.

目的：探索大鼠骨髓间充质干细胞(mesenchymal stem cell，MSCs)在体外定向分化为神经元样细胞的方法并研究其死亡的影响因素。

Methods HBV DNA was extracted from the serum of patient with hepatitis B. The X gene was amplified by PCR using the primers with EcoRI and HindⅢ digestion sites, and then cloned into pronucleus expression vector pMAL-C2X, which was detected by EcoRI and HindⅢ digestion and sequence.

从乙肝病人血清中提取HBV DNA；以带有EcoRI和HindⅢ酶切位点的引物，用PCR方法扩增X基因；而后定向克隆到原核表达载体pMAL-C2X上，经酶切鉴定和序列分析；以IPTG诱导X融合蛋白的表达。

Now targeted disruption of the Jhdm2a gene in mice shows that the enzyme is involved in spermatogenesis and regulation of transition nuclear protein and protamine genes.

现在对小鼠Jhdm2a基因的定向破坏表明，这种酶涉及精子生成和转换核蛋白及鱼精蛋白基因的调控。

At last, b-oriented Silicalite-1 zeolite films are synthesized on glass and quartz glass withseed method.

采用TPABr为模板剂合成定向Silicalite-1沸石膜是一种相对廉价的制作高品质沸石膜的方法，更有工业应用前景和价值。

The DPSK signal's influences on the performance of airborne radio compass including bandwidth, direction finding and beacon recognition, were analyzed in detail.

分析了DPSK调制对现有机载无线电罗盘的工作带宽、定向及台识别等性能指标的影响。

Objective To evaluate the curative effect of stereotactic gamma knife radiosurgery on brain arteriovenous malformations.

目的评估伽玛刀立体定向放射手术治疗脑动静脉畸形的疗效；探讨脑AVM的γ-刀治疗定位方法。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。