细胞

The primary sporogenous cells divided into the second sporogenous cells which would turn into microspore mother cells in a microsporangium. The cytokinesis in meiosis of the microspore mother cells was of modified simultaneous type, forming the decussate, isobilateral or T-shaped tetrads.

初生造孢细胞分裂形成次生造孢细胞，次生造孢细胞再转化为小孢子母细胞，小孢子母细胞减数分裂的胞质分裂为修饰性同时型，四分体排列方式为交叉型、对称型或"T"型，成熟花粉粒二细胞型，开花时散出。

By the test of clonal growth in soft agar medium , we compared the ability of cloning and proliferating among these three kinds of cells. The cell cycle was analyzed by FCM and morphosis of cells was observed under transmission eletron microscope.

通过细胞生长曲线，比较卵巢癌细胞系HO－8910与8910－p93、8910一pCDNA3.1（转染空载体ncDNA3.l）的增殖情况；通过软琼脂克隆形成试验比较这3种细胞的克隆形成能力和增殖能力；利用流式细胞仪检测这3种细胞的细胞周期的改变情况：利用透射电镜观察转染p93基因的细胞的超微结构变化；利用裸鼠移植瘤实验比较HO七与8910个93在动物体内生长状况。

There are significantly differences on H_2O_2 levels between embryos in vivo and cultured in vitro on the early 2-cell stage and late 2-cell stage, but there are no significantly differences among embryos those on the 4-cell stage, morula and blastula using SPSS statistics software.

我们测量的结果是体内2-细胞早期、2-细胞晚期、4-细胞期、桑椹胚、囊胚胚胎的EB荧光密度分别是52.92，50.77，48.84，39.96和30.36；体外2-细胞早期、2-细胞晚期、4-细胞期、桑椹胚、囊胚胚胎的EB荧光密度分别是74.85，82.62，82.98，81.28和54.09。

The results indicated that in the FNAC smears of mediastinal tumor, neutropilic myelocyte, neutropilic metamyelocyte, neutropilic stab granulocyte and neutropilic segmented granulocyte were observed in granulocytic series; early normoblast, polychromatic normoblast and orthochromatic normoblast were observed in erythrocytic series; and granular megakaryocyte, thromocytogenic megakaryocyte, scattered platelet and matured lymphocyte also were observed. Cell morphology and distribution in different stages were are similar to that in bone marrow smear, and these cells belong to the extra-medullary hemopoietic tissue.

结果表明：纵隔肿块的细针抽吸活组织的细胞学涂片显示粒系细胞中可见中性中幼粒细胞、中性晚幼粒细胞、中性杆状粒细胞、中性分叶核粒细胞；红系细胞中可见早幼红细胞、中幼红细胞、晚幼红细胞；并可见颗粒巨核细胞、产血小板的巨核细胞、散在血小板及成熟淋巴细胞；细胞形态及各期细胞分布与骨髓片相似，为髓外造血组织。

Neuroectoderm; neural crest; neural plate; floor plate; neural tube; neuraxis; neuroblasts; neural stem cells; neuroprogenitor cells; stem cells; differentiation; ontogeny; morphogenesis; histogenesis; organogenesis; synaptogenesis; gangliogenesis; embryogenesis; axonogenesis; retinogenesis; gliogenesis; glial progenitor cells; oligodendrocyte progenitor cells; retinal progenitor cells; nerve growth factor; neurotrophic factors; trophic factors; growth factors; neural tube defects; anencephaly; spina bifida; cell migration; neurogenesis; development; developmental stages

神经外胚层；神经脊；神经板；底板；神经管；轴索；成神经细胞；神经干细胞；神经母细胞；干细胞；分化；个体发生；形态发生；组织发生；器官发生；突触发生；神经节发生；胚胎发生；轴突发生；视网膜发生；神经胶质发生；神经胶质祖细胞；少突神经胶质细胞祖细胞；视网膜祖细胞；神经生长因子；神经营养因子；营养因子；生长因素；神经管缺陷；无脑；脊柱裂；细胞迁移；神经发生；发展；发育阶段

Neuroectoderm; neural crest; neural plate; floor plate; neural tube; neuraxis; neurulation; neuroblasts; neural stem cells; neuroprogenitor cells; stem cells; differentiation; ontogeny; morphogenesis; histogenesis; organogenesis; synaptogenesis; gangliogenesis; embryogenesis; axonogenesis; retinogenesis; gliogenesis; glial progenitor cells; oligodendrocyte progenitor cells; retinal progenitor cells; nerve growth factor; neurotrophic factors; trophic factors; growth factors; neural tube defects; anencephaly; spina bifida; neuroblastoma cells; neurogenesis; development; developmental stages

神经外胚层；神经脊；神经板；底板；神经管；轴索；神经胚形成；成神经细胞；神经干细胞；神经母细胞；干细胞；分化；个体发生；形态发生；组织发生；器官发生；突触发生；gangliogenesis；胚胎发生；axonogenesis；retinogenesis；gliogenesis；神经胶质祖细胞；少突神经胶质细胞祖细胞；视网膜祖细胞；神经生长因子；神经营养因子；营养因子；生长因素；神经管故障；无脑；脊柱裂；成神经细胞瘤细胞；神经发生；发展；发展进程

Neuroectoderm; neural crest; neural plate; floor plate; neural tube; neuraxis; neurulation; neuroblasts; stem cells; differentiation; ontogeny; morphogenesis; histogenesis; organogenesis; synaptogenesis; gangliogenesis; embryogenesis; axonogenesis; retinogenesis; gliogenesis; glial progenitor cells; oligodendrocyte progenitor cells; retinal progenitor cells; nerve growth factor; neurotrophic factors; trophic factors; growth factors; neural tube defects; anencephaly; spina bifida; neuroblastoma cells; cell migration; neurogenesis; development; developmental stages

神经外胚层；神经脊；神经板；底板；神经管；轴索；神经胚形成；成神经细胞；干细胞；分化；个体发生；形态发生；组织发生；器官发生；突触发生；gangliogenesis；胚胎发生；axonogenesis；retinogenesis；gliogenesis；神经胶质祖细胞；少突神经胶质细胞祖细胞；视网膜祖细胞；神经生长因子；神经营养因子；营养因子；生长因素；神经管故障；无脑；脊柱裂；成神经细胞瘤细胞；细胞迁移；神经发生；发展；发展进程首页上一页下一页末页共有 22 条记录，本页从第 11 到第 20 条。

PC12 cells were exposed to RA with different concentrations for 72 h and the lengh of neurite and max diameter of PC12 cells were observed at 24,48,and 72 h respectively. The expression of MAP2 was detected by immunocytochemistry after PC12 cells were exposed to RA for 72 h.

不同浓度的RA组均诱导PC12细胞72 h，在24 、48 和72 h分别观察细胞的突起长度和细胞最大直径的变化情况；在诱导72 h后利用免疫细胞化学技术，观察不同剂量RA作用后PC12细胞向MAP2阳性细胞分化的情况。

PC12 cells were exposed to NGF with different concentrations for 72 h and the lengh of neurite and max diameter of PC12 cells were observed at 24,48,and 72 h, respectively. The expression of MAP2 was detected by immunocytochemistry after PC12 cells were exposed to NGF for 72 h .

不同浓度的NGF组均诱导PC12细胞72 h，在24、48和72 h分别观察细胞的突起长度和细胞最大直径的变化情况；在诱导72 h后利用免疫细胞化学技术，观察不同剂量NGF作用后PC12细胞向MAP2阳性细胞分化的情况。

Glia; gliogenesis; glioma; glial cells; central nervous system; CNS; glial progenitor cells; glial fibrillary acidic protein; ependymocytes; ependoma; cytokeratins; vimentin; tanycytes; ion transport; lining cells; cerebrospinal fluid; CSF; ventricular system; floor plate; axon guidance; choroidal cells; choroid plexus epithelium; Chiari malformations; congenital aqueductal stenosis; neuroblast migration disorders; gap junctions

神经胶质；gliogenesis；神经胶质瘤；胶质细胞；中枢神经系统；CNS；神经胶质祖细胞；胶质原纤维酸性蛋白；室管膜细胞；ependoma；细胞角蛋白；波形蛋白；tanycytes；离子转运；衬细胞；脑脊髓液；CSF；脑室系统；底板；；脉络膜细胞；脉络丛上皮；恰里畸形；先天性导水管狭窄；成神经细胞迁徙扰乱；缺隙连接点

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐