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head process
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  头突
     By 13 days 5 minutes after coitus, the head process invaginating in the primitive pit move straight forward in cephalic derection to form the notochordal cord.
     交配后13时5分,原窝底部的头突向前延伸形成管索管。
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  冒口工艺
     To Produce Hydraulic Test Platform with Equalizing Coagulation Principle and Pressure-pad Dead Head Process
     用均衡凝固原理及压边浇冒口工艺生产液压试验平台
短句来源
     A perfect,large hydraulic test platform was made by applying equalizing coagulation principle and adopting pressure-pad dead head process.
     应用均衡凝固原理设计了压边浇冒口工艺,制造出无缺陷的大型液压试验平台铸件。
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  “head process”译为未确定词的双语例句
     In this study the software system is worked out based on the graphic language LabVIEW. The main work includes: acquisition and process of LDGI signals, pulse counting and signal subdiviation, calculation of displacement, positioning control of the XY table, control and data correction of DVD pick-up head, process of the data and some typical application of the system.
     本研究以图形化编程语言LabVIEW为软件平台,开发出纳米三坐标测量机的软件系统,主要工作包括:LDGI信号的采集和处理、周期计数和信号细分、位移计算、X-Y平台定位控制、DVD测头的控制、Z轴位移测量及DVD测头数据修正、测量数据处理以及典型的应用程序开发。
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  相似匹配句对
     m process.
     m工艺到SMIC流片。
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     In the process of the E.
     E.
短句来源
     Process and Utilization Of Kid's Head
     猾子皮头部的加工与利用
短句来源
     Improvement of Cylinder head Casting Process
     柴油机气缸盖铸造工艺改进
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     Hat And Head
     帽子和脑袋
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  head process
Our experiments prove that a piece of the Hensen's node may induce somite formation, even if it is transplanted at the head process stage into posterior parts of the primitive streak which cannot themselves form somites.
      
As for the somite material, its massive invagination begins in the post-nodal region, as soon as the head process appears.
      
Chick embryos have been examined by scanning and transmission electron microscopy from the unincubated to the late head process stages (Hamburger and Hamilton stages 1-5).
      
The right lip of the streak and the node is much more prominent than the left one and contains a cylindrical cell condensation that is connected with the head process.
      
This is true for both the head process and the paraxial mesoderm.
      
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It is well known that the competence of the prospective ectoderm of early amphi-bian gastrulae for neuralization changes with time and region of the embryo. In chickembryo, Woodside (1937) demonstrated also that the neural competence of the epiblastdecreases with increasing age. However, no experimental data bearing on the regionaldifference in competence have been offered. This report represents an attempt to givean analysis of the reactive capacity of the ectoblast of the chick blastoderm with specialreference...

It is well known that the competence of the prospective ectoderm of early amphi-bian gastrulae for neuralization changes with time and region of the embryo. In chickembryo, Woodside (1937) demonstrated also that the neural competence of the epiblastdecreases with increasing age. However, no experimental data bearing on the regionaldifference in competence have been offered. This report represents an attempt to givean analysis of the reactive capacity of the ectoblast of the chick blastoderm with specialreference to time and space. The grafts of Hensen's node at the primitive streak stage, ranging in size from0.3--0.4 mm square were transplanted to the host blastoderms of different ages, varyingfrom the early head process stage up to 4 somites stage (i. e. corresponding to the deve-lopmental stages of 5, 6, 7 and 8 of Hamburger and Hamilton). The grafts were placed underncath the ectoderm at various levels (i.c. antero-latcral to the node or lateral to thenode and streak) of the host. They were then removed at various intervals from 6--30hours after operation, preserved in Bouin's fixatives and stained with dilute Delafieldhematoxylin. It was observed that neural formation, e.g. neural epithelium, neural plate or neuralfold could be induced in the whole epiblast of host blastoderms of stages 5 and 6. Thereactivity changed quickly during the neural fold formation stage (stage 7), the epiblast atthis stage produced only placodal thickenings, except in a few cases the neural formationwas induced in the anterior epiblast of the blastoderm. The placodal thickening couldalso be called forth in the anterior epiblast of host blastoderm of stage 8 (2--4 somitesstage), but the posterior epiblast was incapable of any response to inductors. Ifl otherwords, the competence for neuralization vanished shortly after the late head fold stage(stage 6--7), and the capacity for placodal thickening response vanished in the 4-somitesstage (stage 8). These results clearly demonstrated that the reactive capacity of the epi-blast to inductors decreased with increasing age of the host at the time of transplanta-tion. The results presented here together with those obtained in our previous findingsshowed that there was no regional difference in neural competence in the epiblast of theprimitive streak stage, but such difference did develop gradually with increasing age ofthe blastoderms. Our data indicated that the frequencies of neural response to inductorsof the epiblast were higher at regions anterior and lateral to the Hensen's node andlower at the posterior region in the blastoderm of stages 5 and 6. The frequenciestended to decrease along a gradient axis in a cephalocaudal direction, and appeared tobe no difference in capacity in the epiblast between the left and right side of the blasto-derm. Finally, we also observed in some instances that when a node graft was transplantedto the posterior border of the pellucida area of the blastoderm, a gut-like epitheliumcould be induced from host germ wall endoderm which had been in contact with thechordal mesoderm of the graft. The possible role of endoderm differentiation uponchordal mesoderm and the significance of their relationship are discussed.

将4期原结或原条小块(平均为0.3—0.4平方毫米)分别作卵内移植至5、6、7、8期胚盘的原结前区(预定头区),原结区及原条区(预定躯干区)等不同平面的左侧或右侧外胚层下,在手术后6—30小时内的不同间隔时间取材观察,分析外胚层反应能力的区域性差异及其与胚龄的关系。所得结果简述如下: 1.鸡胚5、6、7、8期胚盘外胚层对原结或原条移植块的诱导呈现不同的反应状态。5—6期胚盘均有神经反应能力,形成分化程度不同的神经组织。7期胚盘除个别标本外,几乎完全丧失神经反应能力,8期胚盘已完全丧失神经反应能力,只出现外胚层板状增厚反应。表明随宿主胚龄的增高,外胚层的反应能力相应下降以至于全部丧失。 2.神经反应能力终止于第6期末期或第6—7期之间。6期胚盘的前后区均仍有不同程度的神经反应能力,7期胚盘除原结前区(预定头区)外胚层似仍有微弱的反应外,已基本丧失神经反应能力。到8期早期,外胚层板状增厚反应能力亦告消失。 3.胚盘外胚层对诱导的神经反应能力,随胚龄的增高而逐渐出现了区域性差异,5—6期胚盘预定头区外胚层的神经反应能力较高,向后有沿头—尾轴逐渐成梯度递减的趋向。胚盘左右侧外胚层的反应能力无显著差别。 4.本文还就胚...

将4期原结或原条小块(平均为0.3—0.4平方毫米)分别作卵内移植至5、6、7、8期胚盘的原结前区(预定头区),原结区及原条区(预定躯干区)等不同平面的左侧或右侧外胚层下,在手术后6—30小时内的不同间隔时间取材观察,分析外胚层反应能力的区域性差异及其与胚龄的关系。所得结果简述如下: 1.鸡胚5、6、7、8期胚盘外胚层对原结或原条移植块的诱导呈现不同的反应状态。5—6期胚盘均有神经反应能力,形成分化程度不同的神经组织。7期胚盘除个别标本外,几乎完全丧失神经反应能力,8期胚盘已完全丧失神经反应能力,只出现外胚层板状增厚反应。表明随宿主胚龄的增高,外胚层的反应能力相应下降以至于全部丧失。 2.神经反应能力终止于第6期末期或第6—7期之间。6期胚盘的前后区均仍有不同程度的神经反应能力,7期胚盘除原结前区(预定头区)外胚层似仍有微弱的反应外,已基本丧失神经反应能力。到8期早期,外胚层板状增厚反应能力亦告消失。 3.胚盘外胚层对诱导的神经反应能力,随胚龄的增高而逐渐出现了区域性差异,5—6期胚盘预定头区外胚层的神经反应能力较高,向后有沿头—尾轴逐渐成梯度递减的趋向。胚盘左右侧外胚层的反应能力无显著差别。 4.本文还就胚壁内胚层对原结诱导的可能反应予以讨论。

The formation of the embryo—axis of Mongolian sheep embryos act on determining the developmental derection of the organic systems. The primitive streak initially developes at about 12days 23hours 47min utes after coitus, at the begining from the caudal node of the embryonic disc, the midline ectodermal surface thickenes and begin to migrate forward in Cephalic end to form the primitive streak, subsequently the primitive node. primitive groove、primitive pit, head process and neural plate appear in turn....

The formation of the embryo—axis of Mongolian sheep embryos act on determining the developmental derection of the organic systems. The primitive streak initially developes at about 12days 23hours 47min utes after coitus, at the begining from the caudal node of the embryonic disc, the midline ectodermal surface thickenes and begin to migrate forward in Cephalic end to form the primitive streak, subsequently the primitive node. primitive groove、primitive pit, head process and neural plate appear in turn. The primitive streak is base on developing the embryo—axis. By 13 days 5 minutes after coitus, the head process invaginating in the primitive pit move straight forward in cephalic derection to form the notochordal cord. atabout 14 days 15 hours, the notochordal cord betweenthe entodermal and ectodermal layers becames into the empty notochordal canal. The floor of the notochordal canal fuses with the underlying endoderm and subseguently the partial floor disappears, opens into the yolksac, form the neurenteric canal temporarily. The notochordal cord is the central axis to form vertebral column of the embryos. The first pair of somites arises at about 15 days3hours 20minutes after coitus about 16days 14hcurs 5minutes after coitus, the 6th pair of somites appear. at the stage, the intermediate mesoderm with the lateral plate clearly saw on each side cf the somites. The interembryonic cavities found on each side of the foregut only. Development of the somites are the base of the organic primodium paired off development of the skeletal system muscular system and urinary—genital system etc. The neural plate at the early stage occurs approximately at 14 bays2 hours 20minutes after coitus. During by developing to 16 days 14 hours 3 minutes, the neural folds of the lateral edges of the neural groove gradully approach each other in the dorsimidline, where they fuse into the neural tube. It is the primordium of the fufure central nervous sys tem of the embryonic body. In a 14 days 5 hours to 16 days 14 hours 5 minutes after coitus, the chorion(serosa)shaws long—visicle shape length 35cm. The yolk tube s longitypical canal length 30cm. The amonion follows the embryonic development, it is wider than the embryonic body. The allantois shaws criscentic visicle developing from the kind—gut of the embryo.

蒙古绵羊胚胎胚中轴的形成,对各器官系统的发生起着定向发育的作用。原条最初发生于交配后12天23时47分。从胚盘后结开始外胚层表面的中线加厚並向前延伸形成原条。随后,原结、原沟、原窝、头突及神经板相继出现。原条是胚中轴发生的基础。交配后13时5分,原窝底部的头突向前延伸形成管索管。交配后14天15时,脊索在内外胚层间形成空心的脊索管。脊索管的底部与内胚层融合。进而消失开口于卵黄囊,形成临时性的神经肠管。脊索是胚胎椎柱形成的中轴。胚胎的第1对体节,发生于交配后15天3时20分。交配后15天15时35分为3对体节(图1),交配后16天14时3分,已出现6对体节(图2)。此时,体节两侧的间中胚层及侧扳分界清楚。胚内体腔仅见于前肠两侧。体节的发生是胚胎的骨骼、肌肉、及尿殖系统等对称发育的基础。早期的神经扳,大约发生于交配后14天2时20分。当胎胚发育到16天14时3分,神经沟两侧的神经皱逐渐在背中线吻合,形成神经管。神经管是胚体未来中抠神经系统的原基。交配后14天5时至16天14时5分,绒毛膜呈长囊状,长约35cm。卵黄管呈细长的管状,长约30cm。羊膜随胚体发育,比胚体稍宽大。尿囊呈半月形囊,发生于胚胎的后肠。

A perfect,large hydraulic test platform was made by applying equalizing coagulation principle and adopting pressure-pad dead head process.

应用均衡凝固原理设计了压边浇冒口工艺,制造出无缺陷的大型液压试验平台铸件。

 
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