查询词典 stem

BACKGROUND: Vitamin A has important effects on growth of spermatogonial stem cells. At present, we have not found an inductive substance of promoting growth and differentiation of spermatogonial stem cells during in vitro culture.

摘要背景：维生素A在体内对精原干细胞生长具有重要作用，目前还没有发现在体外培养过程中能够很好促进精原干细胞生长与分化的诱导物质。

The model were validated by experiment data from Nanjing,the result showed that the value of RMSE of leaf length and width,petiole length and width,main stem internodes length and width,sympodial stem intemodes width,cotton boll height and diameter was 0.48cm、0.65cm、0.53cm、0.09cm、0.02cm、0.55cm、0.28cm、0.23cm、0.14cm、0.17cm、0.20cm、0.11cm,respectively,which indicated the model was accurate and the prediction were better.

利用同年南京相应条件下的试验数据对模型进行了检验，检验结果表明，棉花主茎叶片长度、宽度、叶柄长、主茎节间长、主茎节间粗和果枝叶片长度、宽度、叶柄长度、果节长度、果节直径、蕾铃高度和直径的RMSE值范围分别为0.48cm、0.65cm、0.53cm、0.09cm、0.02cm、0.55cm、0.28cm、0.23cm、0.14cm、0.17cm、0.20cm、0.11cm。

The literature on autopsy studies states no apparent tendency toward these venous channels, and brain stem veins and telencephalic veins are equally affected, although there is a clear-cut predominance of lesions in the brain stem.

尽管脑干部位的小静脉的确最容易受累，但以往的研究文献不但没有发现脑干部位的小静脉管腔特别容易受累，反而认为脑干部位的静脉和端脑部位的静脉受累的几率相同。

Objective The process of immune response to neural stem cell allograft has not been fully understood. This study was designed to investigate the lymphocyte infiltration induced by transplantation of neural stem cells into traumatically injured brain.

目的 探讨在外伤性脑损伤的条件下，移植同种异体神经干细胞所诱发的淋巴细胞浸润现象。

The root system in the cortex of the host stem has a few branches and highly simplified stele of original triarch vascular bundles. The haustrium root system, which is from the root system in the cortex of a host stem enters the vascular tissues as finger-like body from the vascular rays and then to become hyphae-like body among the vascular cells.

皮层根有少数分枝，无次生结构，中柱结构高度简化，从胚根的结构可看出其初生木质部原先是三原型的；吸器根从皮层根上发生，进入寄主维管射线中，再进入维管组织内，并形成许多丝状体。

Methods The Epidermal stem cell were isolated by adhering to collagen type IV after obtained by digesting human foreskin with Dispase Ⅱ and Tryp and culture in vitro in K-SFM. The expressions of β1-integrin and keratin 19 (K19) in epidermal stem cell were detected with immunocytochemical methods,and the colony forming efficiency was also studied .

中性蛋白酶和胰蛋白酶两步法从手术切除的人包皮组织中分离表皮层和真皮层，并获得表皮单细胞悬液，采用Ⅳ型胶原铺板选择性粘附、分离和角质形成细胞无血清培养基培养表皮干细胞。

Attenuation The trp operon is also controlled by attenuation A leader sequence in the polycistronic mRNA upsteam of the coding region of the trpE structural gene encodes a 14 amino acid leader peptide including two tryptophan residues The RNA leader sequence can for several possible stem-loop secondary structures,one of which can act as a transcription terminator whilst a different stem-loop can act as an anti-terminator.

弱化作用 trp 操纵子也受到弱化作用的调控。在trpE结构基因编码区上游的多顺反子mRAN上有一段前导序列，可以编码一个含有14个氨基酸的前导肽，此肽中含有两个色氨酸残基。

For solving the problem of raw material shortage of viscose fiber production and making full use of hemp xyloid stem,the structure and properties of hemp xyloid stem based viscose fiber were discussed by using advanced testing instruments such as SEM and X-ray analyzer.

为了解决粘胶纤维生产原料来源不足，充分利用大麻杆芯制备粘胶纤维，以大麻杆芯粘胶纤维为研究对象，采用扫描电镜、X射线等测试方法对其结构与性能进行探讨。

Compared with bamboo culm, hemp stem didn't have the bamboo node-shaped structure, resulting in lower compressive strength than bamboo and higher shrinkage ratio of hemp stem-based charcoals than that of bamboo charcoals.

与毛竹相比，汉麻秆结构中不具有竹节结构，因而其抗压强度远低于毛竹的抗压强度，其炭化产物的收缩率也高于竹炭的，汉麻秆中的木质素含量低于毛竹中的木质素含量，磷酸活化后所得到的汉麻秆活性炭孔道结构发展更充分。

The tests of word-stem completion and word-stem cued recall were performed at the end of the experiment.

在学习结束后进行词干补笔和词干线索回忆两类测验。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷