细胞核内的

In addition, spermiogenesis includes chromatin condensation, migration of the cytoplasm and mitochondria to the caudal pole of the nucleus, formation of a moderate axial nuclear fossa containing the proximal centriole and part of the distal centriole and presence of a short cytoplasmic canal separating mitochondria from the flagellum.

另外，精子发生过程中还包括染色质浓缩，细胞质和线粒体向细胞核的尾端迁移，在核的后端中轴位置上形成中等大小的核后凹，近端中心粒和远端中心粒的一部分嵌在核后凹之内，短的胞质内陷管将线粒体与鞭毛分隔开。

Nuclei are quite scattered and have only small, granular clumps of blue heterochromatin.

高倍镜显示平滑肌的胞浆嗜酸性，细胞核散在，核内有细小的颗粒状的蓝色的异染色质。

The typical apoptotic morphological features appeared in MUTZ1 cells treated with 4 mmol/L VPA for 72 hours. Pyknosis of cells and nuclei, disintegration of nuclear chromatin and apoptotic body could be observed by light microscopy. Aggregation and margination of nuclear chromatin, concentration of plasm, increment of density and chromatin mass of irregular size could be observed by transmission electronmicroscope. The flow cytometric analysis indicated that the VPA could induce cell apoptosis, apoptosis rate increased in dosedependent manner, ratio of cells at G0/G1 phase increased and ratio of cells at S phase decreased in dosedependent manner, the cells were arrested at G0/G1 phase.

结果显示： VPA对MUTZ1细胞的生长抑制作用呈现时间和剂量依赖性；经4 mmol/L VPA处理MUTZ1细胞72小时后，细胞呈现典型的凋亡形态特征，光学显微镜下可见凋亡细胞胞体固缩、核固缩、核碎裂及凋亡小体；透射电子显微镜下可见凋亡细胞核染色质边集、胞浆浓缩、密度增加，胞浆内大小不规则的染色质团块；流式细胞术结果表明，细胞凋亡率随着VPA浓度的增加而逐步增高，G0/G1期细胞比例随着VPA浓度的增加而逐渐增多，S期细胞比例逐渐减低，细胞被阻滞在G0/G1期。

The typical apoptotic morphological features appeared in MUTZ-1 cells treated with 4mmol/L VPA for 72hours. Pyknosis of cells and nuclei, disintegration of nuclear chromatin and apoptotic body could be observed by light microscopy. Aggregation and margination of nuclear chromatin, concentration of plasm, increment of density and chromatin mass of irregular size could be observed by transmission electronmicroscope. The flow cytometric analysis indicated that the VPA could induce cell apoptosis, apoptosis rate increased in dose-dependent manner, ratio of cells at G0/G1 phase increased and ratio of cells at S phase decreased in dose-dependent manner, the cells were arrested at G0/G1 phase.

结果显示：VPA对MUTZ-1细胞的生长抑制作用呈现时间和剂量依赖性；经4mmol/LVPA处理MUTZ-1细胞72小时后，细胞呈现典型的凋亡形态特征，光学显微镜下可见凋亡细胞胞体固缩、核固缩、核碎裂及凋亡小体；透射电子显微镜下可见凋亡细胞核染色质边集、胞浆浓缩、密度增加，胞装内大小不规则的染色质团块；流式细胞术结果表明，细胞凋亡率随着VPA浓度的增加而逐步增高，G0/G1期细胞比例随着VPA浓度的增加而逐渐增多，S期细胞比例逐渐减低，细胞被阻滞在G0/G1期。

Histological structures of bursas of Fabricius were observed at the different developmental stages from chicken embryoes to chickens. The results were as follows. The bursa of Fabricius began to develop on the 13th day of post-hatching and its cell aggregated into the nodosity clique underneath the epithelium mucosae. On the 15th day of post-hatching, those cell cliques were surrounded by the flat epithelium and formed the basic structure of folliculus lymphaticus. The number of lymphocytes in the folliculus lymphaticus increased gradually, and the medulla and cortex of a majority of folliculus were not discriminated obviously. Until on the 7th day for chickens, the medulla and cortex of folliculus formed completely and the number of folliculus increased significantly. From 21 to 35 days old, the folliculus lymphaticus transformed from polygon into rectangle. Mucosa epithelial cells increased gradually and their cytoblasts arranged compactly into aline in the basilar part on the 35th day.

本研究观察了从鸡胚到出壳后的不同生长发育阶段法氏囊的组织结构，结果表明：胚胎13日龄时，法氏囊开始发育，粘膜上皮下形成结节状细胞集团；胚胎15日龄，聚集的细胞集团形成初始的淋巴滤泡；胚胎18日龄到出壳后1日龄，滤泡内淋巴细胞数量增多，多数滤泡髓质和皮质界限仍不明显；7日龄雏鸡法氏囊髓质皮质分界清晰，滤泡数量显著增多；21日龄到35日龄，滤泡由多边形逐渐转变成长方形；在35日龄时，粘膜上皮细胞逐渐增多，排列紧密，细胞核紧密排列成直线位于基底部。

Pekinensis . IAA at concentration of 0.4-1. 0 mg/L in solid MS medium incited many adventitious roots on hypocotyl segments. The earliest anatomic changes were observed on cut surface of hypocotyl segments under optical microscope 24 hours after IAA treatment: cytoplasmic and nuclear density became higher in a few of parenchytmatous cells adjacent to phloem in tissue of pericycle, followed by cell divisions.

在生长素诱导24h后，可借助显微切片观察到下胚轴切面附近明显的解剖学变化：首先是中柱鞘内靠近韧皮部的薄壁细胞的细胞质与细胞核变浓，染色加深，部分细胞分裂；随后是分裂的细胞团增大，逐渐形成根原基并分化出根冠。

The nuclei were of low to intermediate nuclear grade with minimal nuclear pleomorphism. Thirteen of 17 cases (76%) were associated with conventional high-grade invasive urothelial carcinoma and 9 cases showed very focal intracytoplasmic vacuoles mimicking signet ring cells.

瘤细胞核的核级为低到中级，伴轻微的多形性。17例中有13例（76%）与常见的高度侵袭性的尿路上皮癌相关；有9例含灶性胞浆内空泡的瘤细胞，类似印戒细胞。

Telophase The final stage in mitosis and meiosis, in which the separated chromatids or homologous chromosomes of bivalents collect at the poles of the spindle and the nuclei of the daughter cells are formed.

细胞分裂的末期：是细胞的有丝分裂和减数分裂的终极阶段。在这个时期内，分离的姐妹染色单体或二价体的同源染色体向纺锤体两极聚拢，同时子代细胞核形成。

The pleural superficial blood vessels were smooth, while the constrictions of smooth muscle cells and round imprints of endothelial nuclei occurred on the surface of the subpleural and parenchymal arteriole and venule.

肺胸膜面浅层微血管的铸型表面光滑，胸膜下和肺实质内微动脉和微静脉的铸型表面可见平滑肌细胞形成的缩窄，以及圆形内皮细胞核的压痕。

All mini-nuclei which have immigrated to one cell fuse into one typical pachynema nucleus.

小核逐渐增大，并与其它的小核融合形成更大的小核，最后整个细胞内所有的小核融为一体，形成完整的粗线期细胞核。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。