查询词典 stem

The cellulose xanthate was prepared from waste tobacco stem and used for the removal of Cu2+in water.

以废烟梗为原料，制备纤维素黄原酸酯，并将其用于吸附去除水中的Cu2+。

It was found that sodium hydroxide concentration of alkalizing tobacco stem,the amount of carbon disulfide,the reaction time of carbon disulfide,and the amount of magnesium chloride had greater impact on the cellulose xanthate property of Cu2+removal.

实验结果表明，烟梗碱化的NaOH浓度、CS2的加入量、CS2的反应时间、MgCl2的浓度等4个因素对纤维素黄原酸酯去除Cu2+的性能影响较大。

Tobacco stem ; sorbent ; cellulose xanthate ; copper ion

烟梗；吸附剂；纤维素黄原酸酯；铜离子

The discovery and intensive research of neural stem cells may bring new hope for curing the diseases of cental nerve system.

自NSCs被发现以来，建立体外培养体系，用不同的因素刺激NSCs快速增殖，获取大量的NSCs，寻找影响NSCs分化的不同因素，提高神经元在分化中所占的比例，是国内外许多学者一直研究的方向和目标。

Driven by the valve stem to close one to wind the rotatory central point while rotating,the spheroid to the third a bit more separately, relative valve central point at this moment,from the third orbit a bit one cam form partial another,enter valve flat make valve it keep sealing to shut off down wards .

由阀杆带动关闭件绕旋转中心点转动时，球体由另点移至第三点，此时相对阀门中心点，从另点的第三点轨迹为一凸轮状偏心，向下进入阀座使阀门关闭保持密封。

METHODS:Human bone marrow mesenchymal stem cells were isolated by combining density gradient centrifugation with plastic adherence .

方法密度梯度离心和贴壁培养相结合，分离纯化人骨髓间充质干细胞。

The anatomical structures of stem from Cercis chinensis were studied by the method of paraffin sectioning.

通过常规石蜡切片技术，研究了紫荆1a生和多年生茎的横切面形态解剖特征。

Further study the molecular character of tumor stem cells, and explore the mechanism of drug resistance.

深入的研究干细胞的分子特征、初步探索其耐药的机制。4。

The characteristical time-dependent expression of transcriptional factors HNF4α, C/EBPα, and C/EBPβ during the hepatocyte differentiation by bone marrow stem cells demonstrates that the expressions of these transcriptional factors are closely related to the initiation and maintenance of hepatocyte differentiation.

结论在肝细胞分化过程中，转录因子HNF4α、C/EBPα和C/EBPβ呈特征性时序表达，表明骨髓间充质干细胞在向肝细胞分化时，肝细胞相关转录因子的表达与细胞分化的启动和维持密切相关。

BACKGROUND: Early research indicates that chemotactic factors involved in chemotaxis of bone marrow mesenchymal stem cells in vitro.

背景：早期研究表明趋化因子参与骨髓间充质干细胞的体外趋化，确定骨髓间充质干细胞体内迁移的分子机制，对其介导的细胞治疗中枢神经系统损伤和疾病有重要作用。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失