定向的

Methods and Results— We generated a gene-targeted mouse in which the active CathA was replaced with a mutant enzyme carrying a Ser190Ala substitution in the active site.

方法和结果——我们用在活性部位Ser190Ala替代的突变酶取代有活性的CathA，培养了基因定向小鼠。

Then, the proliferative ability of OPCs in vitro was also investigated with the MTT assay.4. The contusive injury of spinal cord in a rat model was produced by the means of the weight-drop impact of Allen's method. The experimental animals were randomly divided into 4 groups, i.e. OPCs transplant group, transplant control group, plain injury group and sham operation group.

OPCs在体外化学条件培养基中继续生长，通过相差显微镜连续观察和免疫细胞化学技术检测研究分析体外条件下OPCs的定向分化规律和分化成熟情况，并采用MTT检测法研究分析OPCs在体外条件下的分裂增殖能力。4。

Experiments are performed to confirm the chemical etching method for defining the crystallographic orientation of silicon single crystals.

通过实验肯定了硅单晶的化学侵蚀定向方法，找出抛光液的最佳配比及抛光时间。

ABSTRACT With a Ni-base single crystal superalloy, DD8, a series of SC samples solidified with various solid-liquid interface morphologies planar, cellular, dendritical cellular, coarsely dendritic and fine dendritic ctc.

选用镍基单晶高温合金DD8为研究对象，利用籽晶法控制单晶的三维晶体取向，在自制高温高梯度LMC定向凝固装置上制取不同界面形态的单晶试样，首次系。。。

Objective To study the method of inducing human marrow mesenchymal stem cells into osteoblasts directionally and to identify osteogenesis characteristics.

目的：探讨将成人骨髓间充质干细胞定向诱导分化为成骨细胞的方法，并对所诱导细胞的成骨特性进行鉴定。

These motors can efficiently convert the chemical energy of ATP into mechanical energy and move directionally.

这些分子马达可以高效率地将储存在ATP分子中的化学能转化为机械能，产生协调的定向运动而做功。

The linear plasmid and the designed fragment were directively ligated with T4 DNA ligase,and the plant expression vector of carrot afp was constructed.

将目的片段与线性质粒在T4 DNA连接酶的作用下进行定向连接，构建成胡萝卜afp的植物表达载体pBAF。

Objective To explore the clinical value and technique of CT-guided stereotactic system assisted micro-surgery for epileptogenic cavernous angiomas of brain.

目的探讨利用立体定向技术，辅助皮层电极监测，开放显微手术切除导致顽固性癫痫的脑内海绵状血管瘤，提高微创手术的治疗效果。

The microstructure of supercooling solidification is made up by four characteristic regions, from the sample bottom to top are: fine equiaxial dendrites, transition from fine equiaxial dendrites to columnar dendrites, columnar dendrites and coarse equiaxial dendrites.

5深过冷定向凝固的微观组织由四个特征区域组成，从试样底部到顶部依次为：细等轴晶区，细等轴晶→柱状枝晶的过渡区，柱状枝晶区和粗等轴晶区。

Recently, many investigations have demonstrated that transcription factors are more crucial in the process of erythroid development.

迄今，有证据表明在红系的定向分化过程中，转录因子起着更为重要的作用。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。