查询词典 stem

OBJECTIVE: To construct human immortalized precartilaginous stem cells using human precartilaginous stem cells induced by SV40LTAg gene.

目的：以SV40Tag转染的人前软骨干细胞构建永生化人前软骨干细胞株。

［Objective］To construct eukaryotic expression vector containing Sox9 derived from immortalized precartilaginous stem cells and to probe its inductive effect on marrow stroma cells differentiating into precartilaginous stem cells.

［目的］从永生化骨骺干细胞中克隆Sox9基因并构建真核表达载体，并探讨Sox9诱导骨髓基质细胞向骨骺干细胞分化的可能性。

To study the biologicaleffect of pulsed electromagnetic fieldson the proliferation of Immunomagneticseparated human precartilaginous stem cellsin vitro.To establish immortalizedhuman precartilaginous stem cellsstrain and provided stable cell resource to studythe molecular mechanism of gene targeting on differentiation of PSCs.①The cells from the aborted fetus\'s metaphysis were digested by collagenase,the PSCs were isolated by magnetic-activated cell sorting,then were subculturedand amplified.

探讨体外分离、培养人前软骨干细胞的可行性，分析其表型特点；研究脉冲电磁场对免疫磁性细胞分选的人前软骨干细胞增殖的生物学影响；构建猿肾病毒40大T抗原基因(SV40Tag)介导的永生化人前软骨干细胞株，为下一步基因打靶研究其分化分子机制提供稳定的细胞来源。

Among its many biological activities, the major function of GM-CSF is to stimulate hematogenie stem cells prolification from silent stage to S phage, so that the stem cells can differentiate into granulocyte-macrophage cells.

有4个外显子和3个内含子，基因定位于5号染色体长臂5q21-5q32区，大多数器官均能产生GM-CSF，GM-CSF有多种生物活性，作用于多种细胞谱系，其主要作用是刺激造血祖细胞增殖即从静止期进入S期，并分化为粒细胞---单核巨噬细胞。

The 1〓 generation of which is transfusion with mature cells, such as the whole blood and blood ingredient: the representative of the second generation is hematopoietic stem/progenitor cells transplantation, which can regraft normal hematopoiesis and immunity in a body with destroyed immunity and hematopoiesis by the self-renewal and multiple differentiation capacity of stem cells.

第一代细胞疗法是成熟血细胞的输注，如全血输注及成分输血等，对于纠正各种血细胞减少有明显疗效；第二代细胞疗法的代表是干细胞移植，指利用干细胞能够在体内自我更新和多向分化的能力在病态免疫和造血功能被摧毁的机体内重建正常的造血和免疫功能。

The critical nitrogen content in heading period was used to calculate the biggest accumulation quantity of nitrogen. The latent distribution index of leaf and stem, which was the variety heredity parameter, were used to distinguish the difference in nitrogen assignment in different varieties. The dynamic content of the nitrogen accumulation before anthesis could be described with a Richards model. The dynamic content of the nitrogen remobilization in leaf with leaf area index could be described with a power model, and the nitrogen absorption of grain from soil with dry weight could be described with a power model. The dynamic content of nitrogen density in stem and spike with physiological development time could be described with a nonlinear model.

模型利用抽穗期植株临界含氮量来表达氮素最大积累量，引入叶片潜在分配指数和茎鞘潜在分配指数2个品种遗传参数来区别不同品种在器官间的氮素分配差异，采用Richards方程来描述大麦花前氮素积累动态变化；采用指数函数方程来描述叶片氮的转移量随叶面积指数的动态变化以及籽粒从土壤中吸收的氮量随干物重的动态变化；采用非线性函数方程描述茎鞘和穗部的氮浓度随生理发育时间的动态变化。

Twenty-four mice were randomly divided into a liver repopulation model + stem cell transplantation group and a liver resection + stem cell transplantation group, with 12 mice in each group.

将24只小鼠随机分为2组：肝再生模型+干细胞移植组和肝切除+干细胞移植组，每组12只。

OBJECTIVE: To study the intrahepatic transplantation of embryonic stem cells-derived hepatic stem cells in therapeutic liver repopulation models, and to investigate the liver tissue replacement, growth and differentiation in vivo, and neoplastic formation.

目的：应用治疗性肝再生模型进行胚胎干细胞源性肝干细胞肝内移植，观察其在肝组织替代、体内的生长分化及成瘤性情况。

Straight stem; dark brown bark, long slit and long schistic spalling; wood with straight texture and thick structure; resin in the stem; tolerating wet condition.

马尾松树干较直；树皮深褐色，长纵裂，长片状剥落；木材纹理直，结构粗；含树脂，耐水湿。

We took young embryos, mature embryos, stem segments of tissue-cultured shoots, tender leaves and stem segments of adult trees as explants, two high effective in vitro culture systems of Sorbus pohuashanesis plants were established through adventitious shoot and axillary bud regeneration approaches for the first time.

我们以幼胚、成熟胚、无菌茎丛的茎段、成年树的嫩叶和茎段等为外植体，首次通过不定芽和腋芽增殖途径建立了两套高效、可靠的组培再生系统。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。