- 更多网络例句与胚前的相关的网络例句 [注：此内容来源于网络，仅供参考]
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The neural stem cells can be isolated from human embryonic cerebral tissue . The ratio of cell clone formation from smaller gestational age is higher than that from elder gestational age .The differentiation of neural stem cells from hindbrain is easier than that from forebrain.
从人胚脑组织的前、后脑中分离出神经干细胞；较小胚龄的脑组织原代培养时细胞克隆的形成比例较高；后脑组织分离的南京医科大学硕士学位论文神经干细胞比前脑组织来源的更容易分化。
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Embryonic stem cell has the capability of immortalization and pleuripotent differentiation.
胚胎干细胞源于着床前的囊胚内细胞团或早期胎儿原始生殖细胞的一类未分化的多能性干细胞，具有无限增殖和多能分化的能力。
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Axial elongation of inner isodiametric cells of the globular somatic embryo followed by the change in the growth axis of the procambium was an important event in heart-shaped or oblong-stage somatic embryo.
球形胚内部等径细胞轴向延长，接着前形成层生长轴发生变化，这些是心形胚或椭圆形体胚中的重要事件。
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Embryonic development: During normal cloaca development process in rats, before gestational days 15, the urorectal septum developed and clearly demarcated the boundaries of the future rectum dorsally and urogenital sinus ventrally.
结果 ①胚胎发育：泄殖腔发育过程中，胎龄15天前的正常鼠胚，尿直肠隔将泄殖腔分为腹侧的尿生殖窦和背侧的直肠两部分，二者共同相通于泄殖腔管。
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Self-pollination was brought as the essential reason for causing emptied seeds by former researchers. Based on those studies, potassium antimonate and electron microscopy were used to study the calcium distribution of pollens in the micropylar canal of self-pollinated and cross-pollinated ovules and morphological changes in certain cells undergoing programmed cell death from pollination to fertilization, and observation of histo-chemical changes during microgametopyte development was performed by paraffin section.
前人研究认为自交是华北落叶松产生空粒的主要原因，本论文在此基础，运用焦锑酸钾沉淀法配合电镜观察研究了传粉后到受精前异交控制和自交辅助授粉胚珠珠孔道内花粉的钙分布情况，及此过程中细胞程序化死亡超微结构的变化，并通过石蜡切片研究了华北落叶松传粉后到受精前雌配子体发育过程及细胞内含物的变化，以研究在受精前胚珠内是否存在花粉识别与选择系统，探讨钙信号传导和花粉与胚珠相互作用及细胞程序化死亡的关系。
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Normal rat embryos and embryos with ARM from gestational days 12.5to 20were sectioned serially and sagittally and stained with HE to observe development of cloaca and anorectum continually and contrastively.
2·结果①胚胎发育：泄殖腔发育过程中，胎龄15天前的正常鼠胚，尿直肠隔将泄殖腔分为腹侧的尿生殖窦和背侧的直肠两部分，二者共同相通于泄殖腔管。
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In a giving stage after pollination,p53 homologue showed high levels in the antipodal cells,integument,immature endosperm,ovary wall,tracheary elements,and aleurone layer,while c-myc homologue showed low levels in these tissues,only before pollination showed high expression in polar nucleus.
结果发现，在授粉后的一定阶段，在反足细胞、珠被、未成熟的胚乳、子房壁、导管组织和糊粉层中，p53同源基因表达强烈，c-myc同源基因的表达相反，在授粉后的这些组织中基本不表达，而在授粉前的中央细胞的极核中表达水平较高。
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Dorsal enclosure go along the blastokinesis anaphase andaccomplishes at the same time at 48th hour; The embryo eats up yolk unenveloped into themidgut before hatching.
背合在胚动的后期进行，在48h胚动与背合同时完成；在桔小实蝇卵孵化前，胚胎的发育主要是通过未包入中肠的卵黄供给营养。
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The results showed that the expression of calm3 and trm112l genes had no remarkable differences in oocytes and 8-cells stage embryos, but were significantly different in blastocysts. It was supposed that these two genes were possibly maternal genes, and they might be involved in oocyte maturation and zygotic genome activation.
结果显示，在卵母细胞和8细胞期胚胎，基因calm3和trm112l的表达量无显著性差异，而在囊胚期的表达量与前两个时期的表达量存在显著性差异，推测这两个基因在牛胚胎发育过程中的表达可能属于母型调控，提示该基因在卵母细胞成熟和合子基因激活中起一定作用。
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The receptors were obviously densest at the filiform apparatus of the synergids.
麦芽凝集素受体在受精前的中央细胞和卵细胞膜表面均匀分布，而在受精后的合子和初生胚乳细胞膜表面缺失。
- 更多网络解释与胚前的相关的网络解释 [注：此内容来源于网络，仅供参考]
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blastocyst：(囊)胚泡[见于哺乳动物着床前的胚囊]
blastocoel 囊胚腔 | blastocyst (囊)胚泡[见于哺乳动物着床前的胚囊] | blastoderm 胚层;胚盘
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blastoderm：胚层;胚盘
blastocyst (囊)胚泡[见于哺乳动物着床前的胚囊] | blastoderm 胚层;胚盘 | blastogenesis 芽基发育[见于无脊椎动物]
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epiblast：外胚叶
它通常呈鞘状与外胚叶(epiblast)分离开来,单纯成为幼根的保护器官. 但在水稻等植物中它与外胚叶的区别并不明显,因此,莫如把这部分看作是胚的器官中尤其是幼根出生时前胚组织的残留部分较为妥当.
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pronephros：前肾
1.前肾 前肾(pronephros)发生最早,人胚第4周初,位于颈部第7~14体节的外侧,生肾索的头端部分形成数条横行细胞索(前肾小管),其内侧端开口于胚内体腔,外侧端均向尾部延伸,并互相连接成一条纵行的前肾管(pronephric duct).
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wheat germ：小麦胚芽
还记得上回说过加入"小麦胚芽(Wheat Germ)的土司失败,变成有点像发糕一样吗??小婶前两天做了一次加入少量小麦胚芽的土司有成功,所以这一次我也不死心的又想再试试看,只不过这次学聪明了,没有把小麦胚芽加入全部的面团当中,
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nephrotome：生肾节
论述脊椎动物前肾,中肾和后肾的~与功能 专家指导: 一、肾脏的几种类型 肾脏是由中胚层的中节(mesomere)形成的生肾节(nephrotome)组成的. 在无羊膜动物,肾脏的发生要连续经过前肾(胚胎期)和背肾(成体)两个阶段;在羊膜动物则需经历3个阶段,即前肾、中肾
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postembryonic development：胚后发育
加之胚胎发育又在卵中进行,所以在讨论昆虫个体发育过程时,常以胚胎发育(embryonic development)为基点,把胚胎发育前的精、卵形成期叫昆虫的胚前发育(preembryonic development),把胚胎完成后到性成熟的过程叫胚后发育(postembryonic development).
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proembryo：原胚
胚在没有出现分化前的阶段,称原胚(proembryo). 由原胚发展为胚的过程,在双子叶植物和单子叶植物间是有差异的. 1.双子叶植物胚的发育 双子叶植物胚的发育,可以荠菜为例说明,合子经短暂休眠后、不均等地横向油裂为基细胞和顶端细胞.
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pronephric duct：前肾管
1.前肾 前肾(pronephros)发生最早,人胚第4周初,位于颈部第7~14体节的外侧,生肾索的头端部分形成数条横行细胞索(前肾小管),其内侧端开口于胚内体腔,外侧端均向尾部延伸,并互相连接成一条纵行的前肾管(pronephric duct).
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prothoracic gland：前胸腺
四,前胸腺 前胸腺(prothoracic gland)又叫脱皮腺或胸腺,位于头部或前胸两侧,是 1 对透明,带状的细胞群体. 前胸腺在胚后发育过程中,腺细胞在每一个龄期都有明显的分泌活动周期, 它是在脑神经分泌细胞分泌活化激素的刺激下进行的.前胸腺在无翅亚纲中 终生存在,