其纤维

Methods We reported a case of PXA located in the cerebellum of a young adult in view of its extremely unusual location. Morphologic observation, immunohistochemical staining using DAKO EnVision system , histochemical stains including hematoxylin eosin and Gordon Sweet's reticulin methods were used.

采用免疫组织化学DAKOEnVison法、组织化学网质纤维染色和HE染色及形态学观察的方法，报道 1例极罕见于年轻人小脑的多形性黄色星形细胞瘤，探讨其临床病理特点。

Objective To improve the level of early diagnosis and treatment of acute renal failure caused by retroperitoneal fibrosis.

目的 总结腹膜后纤维化的临床特征，以提高对其的早期诊、治水平。

All this growth is concentrated at the base of the hair fiber, where a-keratin filaments are synthesized inside living epidermal cells and assembled into ropelike structures.

其生长集中在头发纤维的基部， a -角蛋白细丝是在此处的表皮活细胞中合成并装配成的绳状结构的。

This thin web is gathered into a soft mass and pulled into a ropelike strand of fibers about1.9～2.5 cm in diameter, called sliver.

薄薄的纤维层汇聚成一个柔软的棉束并被拉伸成条子，其直径为1.9-2.5厘米，通常被称之为棉条。

Low reaction of fetus to inflammation, different extracellular matrix, component of collagen fiber and cell factors may take part in scarless healing process. Regulation of gene expression may play an important role in the process. But the concrete mechanism of scarless healing is not clear yet and still needs more researches and elucidations.

胎儿对炎症的低反应性、胎儿不同的细胞外基质、胶原纤维的成分、细胞因子可能也参与了无瘢痕愈合过程、基因表达调控在其过程中可能也起重要作用，但无瘢痕愈合的具体机制还不明了，有待进一步研究阐明。

DATA SYNTHESIS: Sixteen experiments discussed the relationship between the fetus and scarless healing on terms of growth environment, inflammation reaction to trauma and regulation of fibroblast in organism, extracellular matrix and nany cellular factors.

资料综合：16个实验从胎儿的生长环境、对创伤的炎症反应、肌体内纤维母细胞及细胞外基质、以及众多细胞因子的调节等等方面寻找其与无瘢痕愈合的关系。

RA inhibits chick scleral fibroblasts proliferation significantly in vitro and causes significant ultrastructural changes.

RA对体外培养的鸡巩膜成纤维细胞的增殖有明显的抑制作用，并引起其超微结构的改变。

The results showed that under the given experimental conditions,the surface layer with richiron and poor copper was formed in the surface worn region of the semimetallic friction material,the depth of organic ingredient pyrolysis caused by friction heat in worn surfaces was atout 0.35mm; the semimetallic friction material containing 15%-20%of Cu had better wear-resistance,and can form a even and continuous transfer film of copper; crack peeling was the importantmechanism of the counterpart.

半金属摩擦材料具有摩擦系数稳定，耐磨性好，对环境污染小和对偶件表面损伤小等优点，但其在摩擦热和界面应力等因素作用下，表层会发生弹性变形，塑性变形，元素扩散，组分转移和摩擦化学反应等现象，因此，利用扫描电子显微镜X射线能量色散谱和差热－热重分析，对铜纤维增强的半金属摩擦材料与灰铸铁滑动摩擦表面层的特性作了分析研究，考察了表面层特性对摩擦损行为的影响。

In vitro cytotoxicity experiments the IC50 value for HeLa,K562 and MCF-7 tumor cells is 0.6 mol/L, 0.8 mol/L and 4 mol/L separatedly, while for the normal human fibroblasts cells, even up to 8 mol/L, no cytotoxic effects were observed.

在体外细胞毒性实验中，对人三种肿瘤细胞HeLa、K562、MCF-7具有抑制作用，其IC50分别为0.6 mol/L、0.8 mol/L和4 mol/L，而对于正常人成纤维细胞在酶浓度达到8 mol/L时仍未见明显细胞毒性。

At the indicated times,the influence of CDB on the circadian gene expression of mPeriod1 was sequently detected by RT-PCR.

于诱导后不同时间点，CDB与小鼠成纤维细胞NIH3T3细胞共孵育，RT-PCR检测其对近日节律核心分子mPeriod1(mPer1)基因表达的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。