端细胞

The Mayo Clinic team led by Lisa Boardman, M.D., a specialist in gastrointestinal malignancies, investigated the structures inside of cells known as telomeres, which are the caps on the ends of chromosomes that keep chromosomes from unraveling.

Mayo临床研究小组由恶性消化系统疾病专家Lisa Boardman博士领导，该小组对细胞内部的端粒酶进行研究，端粒酶是染色体两端的帽状结构，它可以保持染色体结构的完整性。

It was also found that the chromosomes paired well and formed a rod heteromorphic bivalent in the hybrid F1[73(36)9-1×CSDT 1BL]. Whereas 73(36)9-1 produced mainly configuration of 20''+1'+t' when test-crossed with CSDT 1BS. It showed that the translocation occurred on chromosome 1B short arm, and this segment came from rye chromosome 1RL. In the present paper we discussed also the way in which the translocation might be caused, and concluded that it was formed through reunion of two kind telocentrica (1BL and 1RL) after simultaneous misdivision of two univalent chromosomes (a wheat chromosome 1B, and a rye 1R).

同时还发现，73（36）9-1和"中国春"双端体的1BL能很好地配对并形成一个棒状的异形二价体，而它和CSDT 1BS的染色体则主要产生20+1′+t′的构型，从而证明易位发生的可能途径，推断是由于在F1花粉母细胞中的两个单价体（一个是小麦染色体1B，一个是黑麦染色体1R）同时进行错分裂之后产生的两种端着丝点染色体（1BL和1RL）重新并合形成的，因而冬小麦73（36）9-1可能是一个自发产生的易位系。

Be similar to most malignant neoplasms, the immortalization of TCCB cells is close relationship with telomerase and telomere of the end of chromosome.

与多数恶性肿瘤类似，TCCB细胞的永生化和染色体末端的端粒和端粒酶密切相关。

High expression of hTERT mRNA in the fibroblasts of keloid may be related to the telomerase activation.

推测人端粒酶催化亚单位mRNA在瘢痕疙瘩成纤维细胞中的高表达与端粒酶活性密切相关。

Recruitment of the 43 S preinitiation complex by the HCV IRES involves a mechanism distinct from that of eukaryotic mRNAs with 5 capped structure.

其5 '端具有高次构造可以经由内部起始机制进行病毒多蛋白质之直接转译作用C 型肝炎病毒5 '端IRES 可直接结合435 前转译起始复合体有别於一般真核细胞戚NA 含有5 ' cap 之转译起始机制。

NAC4 mmol/L,CAT 80·U〓,NDMS 200μmol/L,and Quin 220μmol/Lcould down-regulate apoptosis as well as P53 expression variously induced by〓.

NAC和CAT不但本身可降低三种细胞的端粒酶活性，并可协同地促进〓对端粒酶的下调作用，而Quin2可抑制这种下调作用。

Meanwhile,the development effect,relative molecular weight and mechanical properties of radiopaque polyurethanes with different iodine content were also studied.

利用X-射线映射对不同封端量聚氨酯的显影效果进行评定；利用DSC和TGA对其热性能进行表征，并评估封端反应对聚氨酯热稳定性的影响；利用噻唑蓝比色法测试了材料的细胞毒性；并对具有不同碘含量聚氨酯材料的显影效果、相对分子量及其分布、力学性能进行了对比研究。

In order to avoid prolin residue inhibiting enterokinase cleavage, 9bp of MGF cDNA 5′ end sequence was truncated by primer, then the obtained truncated MGF des(1-3MGF cDNA (321 bp) was subcloned in pET32a vector to construct a prokaryotic recombination expression plasmid.

通过RT-PCR从拉伸刺激的人成骨细胞中克隆MGF cDNA序列，并去除5'端9 bp的序列，使N端缺少对肠激酶(Enterokinase， EK)具有抑制作用的脯氨酸，将截短型MGF des(1-3 MGF cDNA序列克隆入pET32a质粒，构建重组表达质粒。

Proximal dendrites of hippocampal CAI pyramidal neurons receive mainly the inputs from schaffer collateral/associational commissural pathways, whereas the distal dendrites receive mainly the inputs from entorhinal cortex through TA pathways.

由于近端树突接受海马内部侧枝／联合纤维投射的信息，远端树突通过TA通路接受内嗅皮层投射的信息，由此提示，CA1区锥体细胞对来自海马内部和直接来自皮层的信息输入采用了不同的整合方式。

The epineurial vessels run along the nerves length and gave off branches, distributing along nerve bundle, to enter into endoneurium. The endoneurium contained only capillaries. Arteriolovenular anastomoses were few in trigeminal nerve root. The distribution of microvessels in trigeminal nerve root was uneven. The number of microvessels in the medial portion was less than that of the distant.

神经外膜血管沿神经根径向走行，沿途再发侧支斜行或横行入神经束之间，顺神经根束分布，并发侧支进入神经内膜；半月结内微血管围绕神经节细胞分布；三叉神经根内的微血管配布不均，其近侧端微血管数量较少，远侧端微血管数量较多。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。