gastrula

1. The process in which a gastrula develops from a blastula by the inward migration of cells.
   由于细胞向内移动囊胚形成胚囊或肠胚的过程。
2. The results showed: At gastrula stage, the cells in front of the embryonic area gradually cleave to form optic disc rudiment.
   在原肠期，胚区前端的外胚层细胞增殖形成视叶原基。
3. Due to the shortage of trustworthy evidence of gastrula and hatching, their phylogenetic affinity remains a problem of long controversy.
   但是，由于至今未发现可靠的囊胚期到原肠胚期和幼体孵化的化石证据，此类化石的动、植物之争一直没有停止。
4. The incubation period is 66 hours from 18 to 22 ℃. The embryonic development process can be divided into 6 stages, including fertilized egg, cell cleavage, blastula, gastrula, neural stage and organ formation, and there are thirty-one developmental phases observed noticeably.
   在水温18~22℃条件下，胚胎从受精到孵化出膜历时66h，经过了胚盘形成期、卵裂期、囊胚期、原肠胚期、神经胚期、器官分化期6个主要阶段。
5. Embryonic development period including 4 stages: gastrula stage, early trochophore stage in egg membrane, late trochophore stage in egg membrane and at the moment of hatching stage;
   胚胎发育阶段有4个时期：原肠期、担轮幼体早期、担轮幼体晚期和担轮幼体孵化瞬期。
6. Embryos at 4~ 8 cell stage showed higher survival rate and lower abnormal embryo rate than embryos at multicellular stage or early gastrula stage when radiated at the same dose and dose rate.
   在相同剂量和剂量率下，处于4~8细胞期的胚胎存活率比多细胞期和囊胚早期高，而畸形率低。
7. The distribution of NSE and POD were relatively even in the embryo from the oocyte to the gastrula and the embryo showed very strong positive NSE and positive POD.
   从卵细胞到原肠胚均呈比较均一的NSE强阳性或POD阳性。
8. The cell cycle and competence of ectodermal cells of early gastrula of Cynops orientalis& ⅰ. the cell cycle and synchronization
   东方蝾螈早期原肠胚外胚层细胞的细胞周期与反应能力&Ⅰ.外胚层细胞的细胞周期和细胞同步化
9. Suppression subtractive hybridization ( SSH) cDNA plasmid libraries were constructed between gastrula embryos and tail bud embryos in gynogenetic gibel carp ( Carassius auratus gibelio).
   构建了雌核发育银鲫原肠期胚胎和尾芽期胚胎间的抑制性差减杂交cDNA质粒文库。
10. Two-dimensional polyacrylamide gel electrophoresis of newt gastrula ectoderm treated by inducing agents
    蝾螈原肠胚外胚层诱导处理后蛋白质的双向电泳
11. However, the embryos at gastrula or heart beating stage were very sensitive to UV irradiation, showing just damage effect, which was very strong even at very low amount of the UV irradiation.
    而处于原肠期和心脏搏动期的胚胎对UV辐射非常敏感，而且只表现出损伤效应，既使是较低的剂量，损伤作用也很强。
12. 739 and 816 PCR positive clones were respectively selected to perform dot blot, and 72 dot blot positive clones and 98 dot blot positive clones were obtained from the SSH plasmid libraries specific for gastrula embryos and tail bud embryos.
    对原肠期739个和尾芽期816个PCR阳性克隆进行斑点杂交，得到72个原肠期和98个尾芽期斑点杂交阳性克隆。
13. After artificial fertilization, the first and second polar body was released from the egg. The blastula was formed by spiral cleavage. The gastrula, which was formed by invagination, was hatched at 24h pf ( post-fertilization).
    单环刺螠虫受精后卵子先后排放第一、二极体，经螺旋型卵裂后生成腔囊胚，囊胚经内陷形成原肠胚，胚体于受精后24h孵化，形成担轮幼虫。
14. But the development of the CNS is almost mormal when embryos were treated with RA after the gastrula stage, then it did not inhibit the gastrulation and consequently neural induction.
    但在原肠中期以后处理的胚胎，神经系统发育基本正常，因此说明视黄酸并不抑制原肠作用和随后的神经诱导。
15. The result shows that the best chromosomal figure obtained from late gastrula larva.
    结果表明采用刺参的原肠后期幼虫制片效果最佳。
16. In the PA treatment of pregnant crabs with fertilized eggs, the experiment results are as follows: the highest induction rate are 80.18% in gastrula and 27.29% in zoea.
    将抱卵蟹浸入PA液进行处理，受处理卵培育至蚤状幼体检测，最高诱导率2729%。
17. When the cleavage furrow of the two cell stage was irradiated with an energy density of 623 μ J/ μ m~ 2, most of the embryos died in the gastrula stage.
    用623μJμm~2能量密度照射二细胞期卵裂沟的卵，多数只能发育至原肠胚，少数发育成为头部分化不全的蝌蚪而死亡。
18. When exposed to 2~ 8 ℃ for 3 days, the hatching rate of embryo at its cleavage, early blastula, and mid gastrula stages was lower than 30%.
    卵裂期、囊胚早期、原肠中期胚胎在2~8℃水温下，处理3d后孵化率低于30%；
19. The results showed that, the digestive canal initiated from the gastrocoele, which was formed by invagination at gastrula stage.
    结果表明，单环刺消化道起源于原肠胚期内陷而成的原肠腔；
20. The stages of gastrula and hatching are sensitive especially to dissolved oxygen content in water.
    其中原肠期和出膜期是对水中溶氧量特别敏感的时期。
21. The results showed that water content decreased first, then increased in the gastrula stage of embryonic development, reached the highest content at the second phrase larvae stage and then began to decrease from the third phase larva stage.
    结果显示，黑斑口虾蛄在胚胎和幼体的发育过程中，水的体积分数先降低，至原肠胚期开始升高，到第二相幼体期达到最高，之后又有所回落；
22. The pistil shape and the development course of gastrula are not the restriction factor which cause the difference of compatibility intensity in almond.
    雌蕊形态和胚囊的发育过程不是扁桃亲和性强度存在差异的制约因子。
23. Agat transcripts first appeared in the yolk syncytial layer ( YSL) at gastrula stage.
    原肠期开始，agat开始出现在卵黄合胞体层（YSL）。
24. The putative PGCs with Cf-vasa expression form in gastrula stage, and are located symmetrically at both sides of the stomodeum in trochophore. These cells subsequently migrate to the posterior pole of D-shaped larva and then migrate towards abdomen.
    表达Cf-vasa的原生殖细胞形成于原肠胚时期，在担轮幼虫中对称分布于口凹两侧，并随幼虫发育迁移至D型幼虫末端后，继续沿边缘向腹面迁移。
25. From fertilized eggs to newly hatched larvae, can be divided into 4 main stages; including cleavage stage, blastula stage, gastrula stage and formation of embryo stage, total 22 embryonic development stages.
    从受精卵到仔鱼出膜可分为卵裂期、囊胚期、原肠期、胚体形成期4个主要阶段，22个发育时期。
26. The ECs derived from the zebrafish at gastrula stage were isolated and sub-cultured with the trypsin digestion.
    采用胰蛋白酶消化法从原肠期斑马鱼分离出ECs，并进行原代和继代培养。

noun

1. double-walled stage of the embryo resulting from invagination of the blastula