结晶

Calcium carbonate mostly occurs in two forms: metastable aragonite and stable calcite.

贝类的壳含两种碳酸钙结晶，一是亚稳态的霰石结晶，另一是稳定的方解石结晶。

The reason of white band formation in the solidified shell in the mold has been studied by means of water modeling test and the analysis of the solidified microstructure of practical CC slab an.

为了定量把握结晶器中的钢水流动、钢水过热度及结晶器传热阻力对初期凝固坯壳的凝固不均一的影响，利用水冷铜板的浸渍实验，测定了各种铸造条件下的凝固坯壳厚度、凝固不均一度及树枝晶偏角；利用水力模型实验，并对实机铸坯的凝固组织分析，EPMA对负偏析带的线分析，得出了在结晶器中凝固坯壳上负偏析带的产生原因。

The comonomer in the copolymer by cat247 is trend to isolated. A few amount of comonomer could make the melting point remarkably decreased and maintain the crystalline at a relative high level. This catalyst can be use to produce the material with low melting point and high intensity such as packing film with low hotsealing temperature. The copolymer by cat24 is characteristic of uniform comonomer distribution and low melting temperature and crystallinity. Therefore, this catalyst could be used to produce LLDPE and POE according the comonomer content; cat246 has a strong copolymerization ability, and the resultant polymer has relatively high blockiness. If this trend is strengthened by adjustment of polymerization condition, the polymer can be used as thermal plastic elastomer with random and crystalline blocks.

由于各个催化剂所产生的聚合物各具特点，所以其潜在的工业用途不同。cat247的产物中共单体趋于孤立分布，极少的共单体即可使熔点明显降低而结晶度仍保持较高水平，有利于制备低熔点、高强度的材料（如低热封温度的包装膜等）。cat24的催化聚合产物无规程度比较高，对降低熔点和结晶度都十分有效，通过控制产物中共单体含量的多少，可以生产LLDPE和POE；cat246共聚合能力强，且产物有嵌段倾向，通过调整聚合条件强化这一倾向后，可以用来生产具有无规-结晶嵌段结构的热塑性弹性体。

The rate of crystallization can be up to over 88% if the crystallization temperature/time is constant and the boric acid concentration is controlled within

在相同的结晶温度和结晶时间的条件下，硼酸的质量分数控制在28.5%~31.0%，结晶率可达88%以上。

Based on an analysis of the sodium chlorate crystallization process currently practised in China,this article analyses and points out technical problems existing in the crystallization process and suggests that crystallization of sodium chlorate with vacuum and cooling be more economic and reasonable and the main direction for future development.

在分析我国目前氯酸钠生产结晶工艺的基础上，指出和分析了当前生产中结晶存在的技术问题，提出采用真空冷却结晶工艺较为经济合理，是今后发展的主要方向

The eels were exposed to crystal violet bath water of 0.1 mg/L for 24 h at a water temperature varying between 18～21℃.

在水温18~21℃，结晶紫浓度为0.1mg/L的条件下，对鳗鲡进行24h药浴后，采用高效液相色谱-串联质谱仪，对鳗鲡肌肉组织中的结晶紫和隐色结晶紫含量进行连续56d的监测。

The better the compatibility of the system is, the lower the crystalline ability and the integrity of the crystallite are.

随体系相容性提高，共混物的结晶能力和结晶完整性降低，表现出结晶度和熔点都降低。

Common strategies and examples of protein engineering in improving protein solubility, homogeneity, and crystallizability are presented.

近年来分子生物学尤其是蛋白质工程的应用有效地提高蛋白质的溶解度、均一性及可结晶性等内在特性，促进蛋白质的结晶，成为提高蛋白质结晶能力和蛋白质晶体分辨率的有效途径。

The longer the soft segments the better the mobility of the softsegments, and the better the crystallizability of the soft segments.

当软链段分子量超过6000后，软链段结晶的完善程度虽然比均聚物差，但结晶能力对硬链段含量的变化已不敏感，其结晶所需过冷度、熔点和熔融热焓在所考察的硬链段含量范围内基本保持不变。

It is found unexpectedly that for any composition of theEOBT segmented copolymers, when ζ=0.22, the hard segments can start to crystallizeand the crystallizability of the hard segments increases with ζ. Although the definite valuehas no universal significance for all kind of segmented copolymers.

考虑到硬链段受限的程度与软硬链段的长度都相关，用硬链段和软链段的长度比ζ=〓来表征硬链段在这种受限条件下的结晶能力，则发现对于任何分子量的EOBT多嵌段共聚物，只要ζ＞0.22，硬链段就能结晶，此后，硬链段的结晶能力随ζ的增大而增加。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。