卵发生的
- 与 卵发生的 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 snail was found to have an indirect developmental type in the early development. The fertilized eggs were oval-shaped and discoidal cleavage. Embryonic development stages were divided into cleavage, blastula, gastrulae, trochophore, and intra-membrane veliger. Larval development stages included veliger, late veliger and crawling larvae metamorphosed to juvenile.
结果表明:黄口荔枝螺卵囊高度平均为7.33 mm,卵粒数量平均为165粒;黄口荔枝螺的早期发育属间接发生型,受精卵呈椭圆形,卵裂为盘状卵裂;在卵囊内,胚胎发育包括卵裂期、囊胚期、原肠胚、膜内担轮幼虫、膜内面盘幼虫;幼虫发育包括面盘幼虫、后期面盘幼虫和匍匐幼虫。
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Under light microscope, the egg is an oblated and agglutinated demersal with a narrow perivitelline space; eggs ranged in diameter from 1.95 to 2.38 mm with a mean of 2.18 ± 0.03 mm; their membrane are smooth and they have 5 to 7 cannular keratose egg-filaments; the oil globules are multiple, ranged in diameter from 0.05 to 0.50 mm and in number from 7 to 145 with a mean of 28±2, the position of them migrate during embryonic development; the yolks are ivory-white with no segments, ranged in diameter from 1.00 to 2.30 mm with a mean of 1.90 ± 0.03 mm; the development phases of the embryo are variable. So they were identified as the eggs of one Beloniformes.
在光学显微镜下:卵呈微扁圆形,卵径1.95~2.38mm,粘着沉性;卵黄间隙较窄,卵黄囊呈乳白色,无龟裂;卵膜平滑,在其表面有5~7根细长角质管状卵膜丝;多油球数不定(4~145),油球径0.05~0.50mm,油球在卵黄囊中的位置随不同的发育时期而不断发生变化;胚体处在不同的发育阶段,其特征符合颌针鱼目鱼卵的特征。
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According to the size and shape of oocyte, the morphology of nucleolus, the growth of yolk and the structure of follicle, oogenesis of H. d. supertexta can be divided into three stages as follows: oogonium, previtellogenic oocyte and vitellogenic oocyte. The ovary wall is composed of tunica adventitia and germinal epithelium which will produce oogonia and follicle cells. The follicle is the structure unit of ovary.
根据卵细胞的大小、形状,核仁的形态,卵黄颗粒的积累情况,滤泡的结构等,将九孔鲍卵子的发生分为卵原细胞、卵黄发生前的卵母细胞和卵黄发生期的卵母细胞3个时期;卵巢壁由外膜及内生殖上皮构成,生殖上皮分化产生卵原细胞和滤泡细胞;卵巢的结构单位是滤泡。
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The oogenesis of P. esculenta can be divided into the following phases in morphological characteristics of oogonium and oocyte development: the proliferative phase of oogonium (0μm in diameter), the initial growth phase of oocyte (10—20μm in diameter), the grand growth phase-Ⅰof oocyte (20—60μm in diameter), the grand growth phase-II of oocyte (60μm×70μm to 120μm×145μm in size), the mature phase of oocyte, and the declining phase, showing a dynamic changes in oogenesis of P. esculenta .
以卵原细胞与卵母细胞发育的形态学特征为依据,将可口革囊星虫的卵子发生过程划分为:卵原细胞增殖期(卵径0μm)、卵母细胞小生长期(卵径10—20μm)、卵母细胞大生长期Ⅰ(卵径20—60μm)、卵母细胞大生长期Ⅱ[大小为(60μm×70μm)—(120μm×145μm)]、卵母细胞成熟期及退化期6 个阶段,反映了可口革囊星虫卵子发生过程的动态变化。
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Antheridia occurred in the cushion on the dorsal and ventral surfaces of gametophytes while archegonia were observed on the ventral surface only. On hermaphroditic gametophytes, antheridia and archegonia were usually intermingled. Both types of gametangia were eusporangiate.
藏精器与藏卵器分别在孢子洒播10及12月后发生;藏精器长在中肋的背面及腹面,藏卵器只在腹面发生;两性配子体的藏精器与藏卵器混生一起,两者均属厚囊蕨型。
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The results showed that : 1 During nonbreeding season, the giant panda′s ovary was still rich with large and small follicular oocytes, and the large follicular oocytes could be matured in vitro; 2 The mean diameter of the oocytes was (141±6.7)μm and lots of cortical granules contained in the cytoplasm of oo...
结果表明∶(1)在非繁殖季节,大熊猫卵巢中小腔及大腔卵泡卵母细胞仍较丰富,其大腔卵泡卵母细胞可在体外培养成熟;(2)大熊猫的卵母细胞平均直径为(141±6.7)μm ,其胞质富含卵黄颗粒;(3)自配 PandaI I号获能液(含丙酮酸钠、肾上腺素等)可使大熊猫精子有效获能;(4)大熊猫卵母细胞体外受精后,经培养可观察到第2 极体,有的受精卵开始发生卵裂。
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Following chemical activation, blastocysts rate of the treated oocytes was similar to untreated oocytes.8 Following fertilization, however, few oocytes inhibited with CHX developed into morulae/blastocysts, due to a high incidence of polyspermy.9 Cortical granule migration occurred during inhibition, but CHX inhibition impaired CG migration, significantly no oocytes inhibited by CHX completed CG migration after maturation.10 CHX inhibition had no effects onα-microtubles and microfilaments of goat oocytes.
抑制24h转为正常培养24h,不影响卵母细胞的成熟和孤雌激活能力,并且CHX抑制后再成熟的卵母细胞经孤雌激活发育到囊胚的比例与对照组卵母细胞相似。8、体外受精后,CHX抑制后再成熟卵母细胞的多精受精现象显著增加,发育到桑椹胚/囊胚的比例显著低于对照组。9、CHX抑制过程中皮质颗粒仍能发生迁移,但是CHX抑制会对皮质颗粒的迁移造成不可恢复的损伤,使再成熟的卵母细胞内皮质颗粒不能完全迁移。10、CHX抑制对山羊卵母细胞α-微管和微丝都没有影响,无论是抑制后处于生发泡期的卵母细胞,还是抑制后再成熟的卵母细胞,微管和微丝的分布都与对照卵母细胞相似。
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The results were as follows: nanos 1 mRNA uniformly dispersed throughout the cytoplasm of oocytes at all stages. Strong expression of nanos1 mRNA was observed in oogonia and stageⅠ、Ⅱ oocytes, but the signal became weaker in later stage oocytes.
结果表明:在斑马鱼卵子发生中,nanos1 mRNA均匀分布于卵原细胞和各时期卵母细胞的胞质中;在卵原细胞和Ⅰ、Ⅱ期卵母细胞中,nanos1 mRNA的杂交信号十分强烈,而较晚期卵母细胞中信号明显减弱。
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Pig oocytes cultured in vitro for some time were inseminated by frozen–thawed ejaculated sperm. At specified times after insemination, sperm penetration, cell cycle progression and mitogen-activated protein kinase phosphorylation were evaluated. It was shown that:(1) oocytes at various maturational stages could be penetrated by sperm;(2) sperm penetration did not affect meiotic cell cycle progression;(3) sperm penetration of germinal vesicle oocytes and maturing oocytes did not alter MAPK phosphorylation; and (4) when premetaphase I and metaphase I oocytes, in which MAPK was activated, were fertilised, no evident MAPK dephosphorylation was detected as in metaphase II oocytes.
不同成熟阶段的猪卵与精子融合后体外培养发现:(1)不同成熟阶段的猪卵母细胞都可被精子穿透;(2)精子穿透不影响减数分裂细胞周期进程;(3)精子穿透GV期卵母细胞和正在成熟的卵母细胞不改变MAPK磷酸化:(4)已受精的前中期I和中期I卵母细胞的MAPK有活性,MAPK不像MII卵母细胞那样受精后发生磷酸化。
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Japonicus.Nerve extraction substance of sea star and dithiothreitol has been reported to be effectively to induce oocyte maturation in sea cucumbers. In this study we tested their effects on oocyte maturation induction in sea cucumber A. japonicus. The results are as follows, oocyte of A. japonicus does not get mature spontaneously. Neither NES alone nor NES with follicle suspension can induce oocyte maturation. While DTT can prominently increase the percentages of germinal vesicle break down. When the concentration of DTT is between10-1 mol/L and 10-3 mol/L, the effect of maturation induction is more sufficient. When the concentration is about 10-2 mol/L, the percentage of GVBD can reach up to more than 90%.
分别利用在海参中有诱导作用的海星神经提取液和二硫苏糖醇对从成熟卵巢解剖出的刺参卵母细胞进行诱导成熟试验,结果显示,刺参的卵母细胞在海水中不会发生自发成熟,海星神经提取液以及神经提取液加滤泡悬浮液对卵母细胞没有诱导成熟的作用,而二硫苏糖醇处理可以诱导卵母细胞生发泡破裂,当DTT溶液的浓度处于10-1 mol/L到10-3 mol/L之间时,对刺参卵母细胞的促熟作用较为明显,在10-2 mol/L左右时,卵母细胞的诱导成熟率可以达到90%以上。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。