Physical simulation was carried out with 30% NH4Cl aqueous solution. The original position of nucleation in liquid metal excited by vibration was discussed. The results show that the crystallittes are formed on the interface between crystal nucleus projector and NH4Cl aqueous solution. Vibration and cooling promote the formation of crystalline rain. The temperature of the crystal nucleus projector surface should be between the liquidus and solidus in order to make the crystalline nucleus leave and prevent growing up of solidified shell on the surface of crystal nucleus projector by controlling the vibration and cooling.
采用30%氯化铵水溶液进行了物理模拟实验，探讨了振动激发金属液形核过程机理，结果表明：振动激发形核过程中产生的晶粒始于晶核发射器棒体与氯化铵水溶液之间的接触界面；振动和冷却促进了溶液表面结晶雨的形成；为了防止凝固坯壳在棒体表面快速长大，应通过对振动和冷却工艺进行控制，确保棒体表面的温度介于溶液的固、液相线温度之间，从而促进晶体的游离。
The common characteristics are: 1 The mechanism of the crystalline growth of the film is the same; 2 The shape of the crystalline nucleuses is integrated at the beginning of the formation of the nucleuses; 3 The places where these crystalline nucleus and granules pile up and grow are those of the defects such as the fold, nick, disfigurement, and cave and convex inequality at the substrate; 4 The quantity and the size of the crystalline granules increase with the preparation time, the crystalline granules are dispersed gradually from sparseness to all over of the substrate; and 5 The {111} faces of SrMoO4 crystals always appear during the growth.
其共性特征是：1成膜机制相同；2薄膜生长初期就有比较完整的晶核生成；3晶核和晶粒优先选择在金属基体缺陷（折叠、划痕、缺陷、凹凸不平等）处堆砌和生长；4基体上晶粒的数量随着制备时间的增加而增加，晶粒的尺寸也随着时间的增加而长大，晶粒逐渐从稀疏分布到布满整个基体；5在具有白钨矿结构的钼酸盐晶态薄膜的生长过程中，晶体的{111}面总是显露的。
Cervical disease is due to cervical vertebral body and intervertebral disc degeneration (cervical spine or bone spur formation of supernumerary), neoplastic bone or disc nucleus is not the site of oppression, as a result of clinical types are not the same, the resulting clinical manifestations are not the same as.
颈椎病是由于颈椎椎体和椎间盘的退行性变，赘生骨或髓核压迫的部位不一样，导致的临床类型也不一样，产生的临床表现也不一样。
ConclusionThe formation and diminishment of the manchette is in step with the condensation and elongation of the nucleus of the spermatid. Both the structural and positional changes of the manchette coincide with the changes of the nucleus. These results imply that manchette might play an important role in mouse spermiogenesis.
Manchette结构的形成和消失与精子细胞核的浓缩及延伸同步，其形态变化和位置改变与精子细胞核的形态学变化相吻合，在小鼠精子细胞变态成形过程中具有重要意义。
First the nucleus of spermatid deviated and a cytoplasmic process arose to form a zone of differentiation. Then the formation of the central process and two lateral processes were noticed. The nucleus of the spermatid became elongate, and showed as a twisted thread-like structure.
精子的形成首先由精细胞疼痛核向细胞疼痛的游离端移动，然后出现细胞疼痛突起，在突起内可见中心粒和基体，此为分化区，继之胞质突起延伸形成中央突起，并在其两侧出现两个侧突起。
Rhomboid fossa; vagal triangle; solitary tract nucleus; taste perception; conditioned taste avoidance; reticular formation; vomiting center; chemoreception; chemoreceptors; hypercapnia
菱形窝；迷走神经的三角形；孤束核；味觉感受；有条件的味觉回避；网状结构；呕吐中枢化学感应；化学接受体；高碳酸血
The direct method of cell division characterized by simple division of the nucleus without formation of chromosomes.
一种直接的细胞分裂方式，以简单的、不形成染色体的核子分裂为特点。
Starbursts usually occur in the central regions of galaxies, but NGC 4449 has a more widespread star formation activity, since the very youngest stars are observed both in the nucleus and in streams surrounding the galaxy.
星暴通常出现在星系的中心区域，但是 NGC4449 有着更广泛的恒星形成活动，因为在核球和环绕星系的星流中都能观测到非常年轻的恒星。
In order to reveal the molecular mechanisms of extinction contributing to such differences, we used western blot analysis to examine the activation of the extracellular signal-regulated kinase, which is critically involved in memory formation in the medial prefrontal cortex, insular cortex, central nucleus of amygdala, and basolateral nucleus of amygdala after the first extinction trial.
为了厘清造成这两类行为差异的分子机制，我们利用西方点墨法分析第一次「消除」训练后内侧前额叶皮质、岛叶皮质、中央杏仁核与基侧杏仁核（basolateral nucleus of amygdala）等脑区中 extracellular signal-regulated kinase的活性，因为 ERK 是在记忆形成过程中不可或缺的蛋白酶。
The effects of the decarburization of the base metal on bubble formation in enamel coating, the relationship between hardness and firing temperature and time, the effect of crystal nucleus addition and influence of adding adhesive agent.
研究了搪瓷层的硬度与烧结时间和温度的关系，并分析了添加晶核形成剂对搪瓷层硬度的影响，以及搪瓷原料组成中的密着剂对搪瓷层和金属基板密着性能的影响。
It`s shown the inclusion of aromatic nucleus in the branch influenced the micelle formation and aggregation properties.
结果表明，在疏水支链上引入芳环对其胶束的形成及聚集性质有重要影响。
Cantenin is a multifunctional protein that plays an important role in cellular development, cell adhesion, repair and injury, cell cycle regulation and tumor formation. It is not only associated with E-cadherin to maintain strong cell-cell adhesion and tissue integrity in epithelium, but also a key component in Wnt signaling to regulate the expression of a variety of genes by its translocation to the nucleus and interaction with transcription factor TCF/LEF (T cell factor/lymphoid enhancer factor).
连环素是一种多功能蛋白，既可作为细胞骨架蛋白与E-钙粘附素结合，参与组成中间连接，维持上皮细胞的极性和组织结构的完整性；又是Wnt信号途径的重要成员，可与TCF/LEF(T cell factor/lymphoid enhancer factor)结合形成转录因子复合体，调节多种基因的表达，参与细胞和组织的发育分化、损伤修复以及肿瘤的发生发展等生物学过程。
Embedding test in vivo results suggested that one week after PVA-collagen implantation, foreign body reaction occurred, and the interface between material and tissue was clear. Four weeks later, only rare lymphocyte infiltration was observed, and a great amount of fibroblast hyperplasia formed collagen fibrils and false simple cuboidal epithelium coating material. In 8 weeks, no lymphocyte infiltration, neutrophilic granulocyte infiltration or foreign body giant cell were found; dense capsule wall and capsule coating material generated from a great amount of fibroblasts were observed. In 16 weeks, extending collagen fibrils were found arranged regularly with shrank nucleus, showing long ovoid or long fusiform in shape; no new formation small vessels, lymphocyte, neutrophilic granulocyte infiltration or foreign body giant cell infiltration were observed.
体内埋植试验结果：聚乙烯醇-胶原植入1周后，产生了正常的异物反应，材料与组织界限分明。4周后，只见极少量淋巴细胞浸润，大量的纤维母细胞增生形成胶原纤维和假单层立方上皮细胞包裹材料。8周未见淋巴细胞浸润、中性粒细胞和异物巨细胞，囊壁致密，大量的纤维母细胞增生形成包膜包裹材料。16周可见囊壁致密，胶原纤维变长，捧列规则，核变小，呈长卵圆形或长梭形，无新生小血管，无淋巴细胞、中性粒细胞和异物巨细胞浸润，囊壁稳定、变薄。
In our studies, it was found that zeolite Beta can be synthesized in the non-nucleation region in the presence of a certain amount of mother liquid. Basing on the result, the structure directing agent for synthesis of zeolite Beta was found for the first time, only small amount of TEAOH was required in the synthesis of zeolite Beta. There are many advantages for the synthesis of zeolite Beta by using the structural directing agent, including the simple preparation and long life time of structural directing agent, small amount of TEAOH used in the synthesis of zeolite Beta, the short crystallization time. The micro-crystal nucleus of zeolite Beta was determined in the structural directing agent. It is considered that the micro-crystal nucleus play an important role in the crystallization of zeolite Beta. The results of physical chemical analysis suggests that the tetrahedron chemical group consisted of hydrated Na〓 and TEAOH may have the templating effect for the formation of the micro-crystal nucleus of zeolite Beta. Further, the presence of other organic molecules in the synthetic system has large effect on the formation of zeolite Beta.
在研究中我们首次发现可以利用合成Beta沸石时的母液为晶化导向物质，在Beta沸石的非成核区合成出Beta沸石在此基础上我们又发现了Beta沸石导向剂，而且Beta沸石导向剂制备简单，在室温下寿命很长(已考察的时间为60天)利用导向剂法合成Beta沸石，合成体系中所含有机模板剂的量很少仅为加入少量导向剂时的带入量，合成体系中(TEA〓O/Al〓O〓＝0.33，大大降低了Beta沸石的合成成本，更适用于互业化生产，在用导向剂法合成Beta沸石过程中，我们发现Beta沸石导向剂中已存在Beta沸石微晶核，是这种微晶核起结构导向作用在非Beta沸石成核区合成出Beta沸石，并进一步证明了Beta沸石属液相成核机理，且提出Beta沸石微晶核形成过程中水合Na〓离子和TEAOH分子的正电四面体模板效应，即由水合Na〓离子和TEAOH分子形成的化学集团在Beta沸石成核过程中起结构导向作用，同时我们还在小分子胺，醇胺和醇的半水体系中成功地合成出Beta沸石。
For double jet method, effects of used solvent, shape of stirrer, adding reactant position, reaction temperature, excessive silver ion concentration in reaction solution and adding rate on the nucleus formation, and growth of silver behenate crystal were systematically studied.
本文分别采用单注沉淀法和双注沉淀法制备了山嵛酸银晶体，通过对两种制备方法的对比及优选，最后确定双注沉淀法更适合制备细粒径的山嵛酸银，通过采用SEM、TEM等对山嵛酸银晶体形貌的表征发现，制备山嵛酸银所使用的溶剂、搅拌方式、加料的位置、反应温度、反应初始液中银离子浓度及加料速度等，均对山嵛酸银的晶体成核与生长有一定的影响。
The formation process of the SPT nanopowders under ultrasonic action goes through two steps. First is the formation of the titanium hydroxide gel through the hydrolysis of TiCl4, and then the Sr2+ and Pb2+ are diffused to the titanium hydroxide gel surface. After this, they are combined with the titanium's hydrous nucleus to form the SPT nanoparticles under the effect of ultrasound.
超声化学法合成SPT纳米粉的反应分两个过程进行：首先TiCl4水解形成富钛凝胶；然后在超声影响下，溶液中的Sr2+和Pb2+扩散到钛凝胶表面，并以其为核生成SPT纳米颗粒。
The grain-refinement mechanism of Mg-Al-C for AZ91 alloy is the formation of nucleus particle A14C3, whose crystal lattice is the same asα-Mg and the lattice disregistry is small. As the addition amount of grain refiner in alloys increases, the grain size becomes smaller, meanwhile, the mechanical properties have been upgraded, the best addition for AZ91 Magnesium alloys is 0.6~0.9% and the grain refining effect is shown obviously. The mechanical properties with refined structures are tested. It proves that both plasticity and the strength are improved.
对Mg-Al系合金AZ91加入Mg-Al-C中间合金细化剂后进行研究，AZ91合金的铸态组织明显得到细化，由320μm左右细化到50μm，通过检测后初步认为是由于Mg-Al-C中间合金中形成有与α-Mg晶格相似的形核质点A14C3物相，研究表明Mg-Al-C细化剂有较长的衰退期，即在730℃下镁合金液中加入Mg-Al-C细化剂保温20分钟后仍具有良好的细化效果。
In this paper, an analysis is made on several thoughts on solidifying theory mainly including two fields: crystal nucleus formation and dentrite morphology and dentritic growth theory.
本文主要对凝固理论研究中的几个问题进行了分析，主要包括晶体形核和枝晶形貌及生长理论研究两个方面。
In this thesis, the reason why ECI can produce samples of high density was discussed by comparing ECI and chemical way on the formation of crystal nucleus and the growth of crystal.
论文中从多个方面研究了所制备产品（包括不同掺铝量及复合掺杂铝和其它金属元素的产品）的性能。
The formation mechanism for the body-centred cubic structure of Li9 cluster is proposed. The curve of the total energy versus the separation R between the nucleus at the centre and nuclei at the apexes of this structure has been calculated by using the method of Gou`s modified arrangement channel quantum mechanics.
本文提出了Li9团簇体心立方结构的形成机理，并对此结构的总能量随中心原子到顶点原子间核间距R的变化用芶氏改进的排列通道量子力学方法进行了计算。