核仁

Compared with the corresponding BEAS-2B cells, the shapes of cells and nuclears, the shapes and quantity of cell organs were not significantly changed in the 1st, 2nd, 5th passage BEAS-2BNNK cells. The 10th, 15th passage BEAS-2BNNK cells, which had swelled cell and cell organs and abnormal nuclear and enlarged the nucleoli gradually and increased the quantity of the cell organs and activated their function, showed the characteristic of transformation cells. The 20th, 25th passage BEAS- 2BNNKcells, which had obvious aberration of the cell and nucleoli and had cataclasm of nucleoli and decreased cell organs, showed the characteristic of tumor cells.

与BEAS-2B相比较BEAS-2BNNK第1、2、5代细胞及胞核形态、细胞器形态及数量无明显差别；第10、15代细胞出现肿胀，细胞核逐渐变形，出现核畸形，核仁明显增大，边集，细胞器肿胀，数量明显增多，功能活跃具明显的转化细胞特征；第20、25代细胞及胞核明显畸变，出现明显的核碎裂及多个核仁，细胞器明显减少，具明显的肿瘤细胞特征。

Nucleolus disappeared, but some plants in the early diakinesis nucleolus remains high.

核仁消失，但有的植物在终变期的早期核仁仍然很大。

At 400μg/mL, the micronucleus ratio was 36.0l‰ and karyokinesis index was only 1.90%. The multi-nucleolus ratio was significantly enhanced at the concentration 200~400μg/mL, and the ratio at 400μg/mL was 26.10‰.

当细交链孢菌酮酸浓度为12.5~100μg/mL时，与对照相比，蚕豆根尖细胞多核仁率无显著差异，多核仁率低于3‰；浓度升高到200~400μg/mL时，细胞多核仁率显著升高，400μg/mL时，多核仁率高达26.10‰。

Ultrastructure of nucleolus; the functionS of nucleolus; nucleolar cycle.

四 核仁的超微结构；核仁的功能；核仁周期。

Further observations upon the nucleolus revealed that the density of the gold particles in the dense fibrillar component of the nucleolus was much higher than that of the fibrillar center,demonstrating that the protein was largely situated in the DFC rather than FC.

对核仁的进一步观察指出，在核仁中金颗粒主要分布在DFC，FC中的金颗粒很少，说明在核仁中SC35类蛋白主要存在于DFC组分中。

About nucleoli in mature monocytes. In normal condition, mature monocytes do not have nucleoli or very small.

关于成熟单核细胞的核仁，在正常情况下，成熟的单核细胞没有核仁或者核仁非常小。

The mature egg cell was an inactive cell with only a few polysomes. At the early zygote stage, a large number of ribosomal precursors were produced by the nucleolus, and many polysomes appeared in the cytoplasm, which suggests a high level of metabolism. Zygote at the dormancy stage had a small nucleolus and marked decrease in ribosomes, as shown by a few polysomes, which suggests decreased metabolism. Zygotes in the prophase of mitosis and two-celled proembryo became active again in metabolism, for a prominent nucleolus, high density of ribosomes and increased number of polysomes in the cytoplasm.

结果如下：在成熟卵细胞中多聚核糖体数量不多，且细胞代谢活性较弱；初期合子内，核仁大量合成核糖体前体物质，胞质中多聚核糖体数目众多，细胞代谢活性较强；休眠期合子的核仁变小，胞质中核糖体数量急剧减少，仅有少量多聚核糖体，细胞代谢活性较弱；合子分裂前期和二细胞原胚期，核仁显著，胞质中核糖体的密度增加，出现大量多聚核糖体，细胞代谢活性较强。

RDNA in different positions existed in either condensed or uncondensed forms. Nucleolus-associal-ed chromatin outside nucleolus extended in the periphery of FC via channels in the nucleolus.

不同位置的rDNA成分都具有集缩和解集缩两种形态结构，核仁外的核仁伴随染色质经过核仁通道进入核仁，沿FC周边排列，与其中的DNA相连。

The incompatible results have been reported even with the same methods But these studies were carried out on the basis that the structure of nucleolus is regarded as a static state. However, the nucleolus is a highly dynamic structure during the cell cycle. It disassembles in the late prophase and reassembles at the end of mitosis.

不过以前对核仁结构和功能的研究大多只是对细胞间期中某个时期细胞的核仁进行静态研究，然而核仁是一个高度动态变化的结构，在细胞分裂前期解体，在细胞分裂末期又开始重建。

Results of study on the behaviour of pine nucleolus during the cell cycle suggested that part of the nucleolar substance, at least, entered the chromosome or attached to the chromosome surface during metaphase and was librated from chromosome to form a new nucleolus during anaphase in higher plants.

对松核仁细胞周期中变化的研究发现，在有丝分裂中期，至少部分核仁成分进入染色体内部或附着在染色体的表面，而在后期从染色体中出来形成新的核仁。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。