结晶化学

Character: White or almost white crystalline powder, smell-less;Assay:≥98.5%;Solubility:Soluble in water, Slightly soluble in acetone and ethanol;IR:Complies with the working standard;Chemical identification:Red;Na Salt indentification:Complies with the standard;Relative substance:Complies with the working standard;pH:8.0-9.5;Loss on drying:≤0.5%; Heavy metal:≤ 20ppm

特征及特性：应为白色或类白色结晶性粉末；无臭，无味；含奥扎格雷钠(C13H11N2NaO2)≥98.5%；在水中溶解，在乙醇和丙酮中微溶；IR图谱与对照品一致；化学鉴别应显红色；溶液主斑点与对照品溶液主斑点的位置相同；钠盐鉴别符合规定；有关物质鉴别符合规定；pH：8.0～9.5；；干燥失重≤0.5%；重金属≤20ppm

In this paper, the solubility of 7-ADCA in pure water under different temperature and pH was measured.

文中首先测定了不同温度及不同pH值时7-ADCA在水溶液中的溶解度，并通过溶液化学的方法确定结晶过饱和度。

A sweet-tasting crystalline nonessential amino acid, C2H5NO2, that is the principal amino acid occurring in sugar cane.

甘氨酸一种甜的结晶状氨基酸，c2h5no2，是甘蔗中基本的氨基酸，由明胶的碱性水解获得，用于生物化学研究和医学

Starting from the crystallographic data of lithium niobate and lithium tantalate crystals, structural characteristics and chemical bonding behaviors of both crystals are studied.

从铌酸锂和钽酸锂晶体的结晶学数据出发，分析其结构特征和组成化学键的结合情况。

This paper introduced physical and chemical properties of polyvinylidene fluoride,with good thermoplasticity,which provided diversitied usages.

主要介绍聚偏二氟乙烯———一种具有多种用途的热塑性氟塑料，由于独特的结晶形态和介电性能而具有良好的耐化学腐蚀性。

So even if the bugs and their secreted proteases do not chop your sample into bits, they can degrade reagents, alter the pH of the solution, or generate chemical species which can influence crystallization and even make reproducing conditions a pain in the tush.

就算这些可恶的家伙们没有将你的样品"嚼碎"，它们也可能影响你的试剂，改变溶液的pH，产生可能干扰结晶的化学物质，使得你的实验很难重复出来。

Furthermore, the experimental k values were used to determine the associated activation energy, Ea, for the formation of La2/3TiO3-type phase using the Arrhenius plot and the following least-square equation, ln =-Ea/RT + A, where T is the annealing temperature, R is the universal gas constant, and A is a constant, resulting in Ea ~ 607 ?

第二部分则是以微观的方式来解析Pb2+离子与La4Ti9O24陶瓷以及La2/3TiO3-type相晶格之间的关系；利用化学共沉法来合成不同Pb2+离子添加量的La4Ti9O24陶瓷起始粉体，再以900 oC /1h的条件热处理；藉由选区电子绕射图谱以及X-ray绕射分析所生成之La2/3TiO3-type相结构；结果显示La2/3TiO3-type相之结晶结构为斜方晶之钙钛矿结构，符合空间群IbmmNo。

In this paper, we adopted rapid thermal chemical vapor deposition and zone melting recrystallization methods to deposit polycrystalline silicon thin films and studied the preparation technologies of the solar cells on SiSiC and Al_2O_3 ceramic substrates by high temperature method.

本文采用快速热化学气相沉积和区熔再结晶相结合的方法，在SiSiC和Al_2O_3等陶瓷衬底上制备多晶硅薄膜，并初步探索了高温路线制备多晶硅薄膜太阳电池的相关工艺。

This paper gives the principle, range,characteristic and recent progress of ultrasonic applications in the cleaning, extraction, crystallization/decrystallization, emulsi-fication/demulsification, sonochemistry and oil extraction and so on.

本文主要对超声波在清洗、萃取、结晶粉碎、乳化破乳、超声化学、采油等化工领域中的应用原理、范围、特点和现状进行评述。

But after much tinkering with different combinations of detergent, ions, and chemical additives, Strynadka's team was able to crystallize the enzyme so that it would diffract x-rays into a pattern that would ultimately reveal its natural structure.

但是在多次与不同结合物去污剂、离子和化学添加剂等组合后， Strynadka 小组终于能够使该酶结晶，以至能经过 x 光衍射成图像，最终显示它的本来结构。

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。