Embryonic stem cells ( ESCs ) are pluripotent cell lines of earlier embryonic origin cultivated in vitro with anti-differentiation factors . When cultured in vitro ESCs can keep undifferentiation state and passage to the future generation .

胚胎干细胞（ESCs）是早期胚胎经体外分化建立的多能性细胞系，体外培养时保持 未 分化状态，可以传代增殖。

There is a significant variation ( P < 0 05 ) between the positive rates in expressions of both proteins in undifferentiation carcinoma and well-differentiation adenocarcinoma .

未 分化癌与高分化腺癌之间二种蛋白表达的阳性率均有显著性差异（P<005）。

These results indicate that feeder layer has certain action in suppressing ES cell differentiation in culture while exogenous LIF play predominant role in maintaining ES cells undifferentiation . 4 .

说明饲养层细胞在ES细胞的分化抑制中有一定作用，而起主导作用的是外源 LIF。

Small molecules in maintaining embryonic stem cell undifferentiation

小分子物质对维持胚胎干细胞 未 分化 状态 的 调控 作用

Principle Uncontrolled growth the characteristic of tumor histology consist of excess proliferation and undifferentiation with embryonic characters .

1基本原理肿瘤的组织学特点是 细胞生长失控、过度增殖、 分化 停止并 呈现 某些胚胎性状。

When isolated EG cells were examined by morphology observation AKP strain and in vitro differentiation ability they were convinced to have a series of characters of mice EG cells including cloning grow way undifferentiation state and pluripotency of cells .

对所分离EG细胞经形态观察、AKP染色和体外分化能力检测，证实其 符合小鼠EG细胞的集落 状生长、细胞 未 分化特性及细胞多能性等特征。

Histological studies showed : apical meristems undifferentiation of some abnomal embryos was one of factors which affect production of complete plant .

对 成熟处理过的体细胞胚的组织学研究表明，形态学上 苗 端 未 分化是形态不正常胚不能形成完整植株的原因之一。

EDAG gene has the activity of malignant transformation and is relative to maintaining undifferentiation of cells .

研究表明 EDAG具有恶性转化活性，与维持细胞的 未 分化 状态有关。

Among 0 % 2.5 % 5 % and 10 % groups 2.5 % FBS had profit on spermatogonial cells to grow and form more cell colonies and profited to keep their undifferentiation state .

0%、2.5%、5%和10%四组中，2.5%血清有利于精原细胞生长并形成较多的集落，同时有利于维持精原细胞的 未 分化状态。

Identification of undifferentiation markers on human corneal and limbal epithelia

人角膜及角膜缘上皮细胞 分化标记的检测

No cell surface markers were detected in eight cases defined as acute undifferentiation leukemia .

有8例未测到任何标记抗原， 归属 于急性 未 分化 型白血病。

Conclusion It is very important for special culture medium to keep undifferentiation state in MSC culture .

结论专用培养基对MSC体外培养中保持 未 分化状态很关键。

Overexpression of the BCL 2 proto oncogene in esophageal small cell undifferentiation carcinoma

BCL-2癌基因蛋白在食管小细胞 未 分化癌表达的研究

The alkaline - phosphatase - positive cells can be maintained growth well and undifferentiation until 6 passages .

AKP染色阳性细胞在上述 培养基中传至6代仍生长良好和保持 未 分化 状态。

The main resons are as follows : 1 . The process of Apricot flower buds morphological differentiation can be divided into six stages : undifferentiation period differentiation period calyx differentiation period petal differentiation period stamen differentiation period and pistil differentiation period .

结果如下：（1）杏花芽形态分化过程分为： 未 分化期、分化初期、萼片原基分化期、花瓣原基分化期、雄蕊原基分化期和雌蕊原基分化期六个阶段。

Genes regulating development and differentiation participate in the embryo development and differentiation of inner cell mass and trophectoderm which controls the transition from undifferentiation to differentiation stage .

调节发育和分化的基因参与胚胎的发育和内细胞团、滋养外胚层细胞的分化，调节胚胎由 未 分化 状态向分化状态过渡。

In the junior high pupil the bipolar type occupies majority next is the undifferentiation type last is the virilized type what occupies the proportion to be least is the feminization type .

在初中生中，双性化类型占大多数，其次是 未 分化类型，再次是男性化类型，所占比重最少的是女性化类型。

Effect of Feeder Layer Culture System and Leukemia Inhibitory Factor on Keeping Mouse Embryonic Stem Cells in Undifferentiation

饲养层细胞体系及白血病抑制因子对维持小鼠胚胎干细胞 未 分化 状态的作用

Under transmission electron microscopy undifferentiation P19 cells had a large nucleus and plenty of cell organ which distributed around nucleus and there were abundance hepatin granule .

透射电镜观察未经诱导的 P19细胞胞核较大，细胞器丰富分布于细胞核周围，胞质中可见大量糖原颗粒。

The PNI positive rate were significantly higher in the undifferentiation vascular infiltration and lymphatic metastasis patients than those of others ( P < 0.05 ) .

神经束膜浸润阳性率在 未 分化 肿瘤、血管浸润、淋巴结转移的患者中明显增高（P<0.05）。

RH-CM can be used as supplement of ES cell media . ES cells which are cultured in media containing 70 % RH-CM and on PMEF feeder can maintain their undifferentiation state and diploid karyotype .

RH-CM也可作为小鼠ES细胞培养基的添加物，用含70%RH-CM的ES细胞培养基和小鼠胚胎原代成纤维细胞饲养层（PMEF）培养ES细胞，可长期有效地维持其 未 分化状态和二倍体核型。

The process could be divided into five phases : undifferentiation stage outer petal differentiation stage inner petal differentiation stage stamen differentiation stage and pistil differentiation stage .

其过程可分为 未 分化期、外轮花瓣分化期，内轮花瓣分化期，雄蕊分化期，雌蕊分化期五个时期。