结晶化学

The intermediate product was trichloromethyl benzyl alcohols that further reacted with acetic acid to prepare the crystal rose.

结晶玫瑰化学名为醋酸三氯甲基苄酯，是花香型香精优良的定香剂[1]，它广泛应用于人们的生活和生产中。

Based on the theories of rheology, Non-Newtonian Fluid Mechanics, petroleum chemistry, crystallography and pipeline technology etc. and sampling Huabei crudes, experimental indexes and programmes are drew out, integrating the oil properties and parameter analysis; in terms of the macro analysis of continuum mechanics, substantial experiments are conducted with HAAKE RS600 rotational rheometer and the rheological equation as well as the viscosity-temperature equation are further developed with tested rhrogramme and viscosity-temperature curve, respectively. Beased on the researches on thixotropic mechanism and thixotropy fluid property, hysteresis loop curve, structure failure and viscosity build-up curve as well as shear stress decrement curve for one type oil are first present in this paper. According to the theoretical researches and testing results, a novel thixotropy equation with τ=τ_∞e~ pattern, which is of hi-accuracy, few parameter and simplicity, is developed. Considering the influence of various parameters on rheological behaviour, depressant adding condition is optimized and experimental evaluation on BEM-5P is conducted, which further unrip its mechanism on the Huabei crude. A corresponding viable pipe transportion programmel is also recommended.

本文基于原油流变学、非牛顿流体力学、石油化学、结晶学、原油管输工艺学等理论，以华北原油为研究对象，结合原油物性及实验影响因素分析，制定出实验研究的评价指标及实验方案；从连续介质力学宏观分析的角度，利用HAAKE RS600高端旋转流变仪开展了大量的室内实验，并运用微观研究方法，测定了油样的流变曲线和粘温曲线，建立了流变方程和粘温方程；通过对触变性机理和触变性流体特征的研究，首次对华北原油测定出滞回环曲线、结构破坏与恢复粘时曲线、剪切应力裂降过程曲线，并在理论研究和实验结果的基础之上，建立了能定量描述含蜡原油剪切应力裂降过程的新型三参数触变模式τ=τ_∞e~b/(t+c，该模型具有精度高、参数少、实验简便且适用性强的特点；通过对含蜡原油流变性的影响因素理论研究，开展了加剂条件优选及BEM-5P降凝剂室内评价实验，进一步揭示了降凝剂对华北原油作用机理，在此基础之上，提出了华北原油管输的可行性方案。

Based on the theories of rheology, Non-Newtonian Fluid Mechanics, petroleum chemistry, crystallography and pipeline technology etc. and sampling Huabei crudes, experimental indexes and programmes are drew out, integrating the oil properties and parameter analysis; in terms of the macro analysis of continuum mechanics, substantial experiments are conducted with HAAKE RS600 rotational rheometer and the rheological equation as well as the viscosity-temperature equation are further developed with tested rhrogramme and viscosity-temperature curve, respectively. Beased on the researches on thixotropic mechanism and thixotropy fluid property, hysteresis loop curve, structure failure and viscosity build-up curve as well as shear stress decrement curve for one type oil are first present in this paper. According to the theoretical researches and testing results, a novel thixotropy equationwith τ=τ_∞e~ pattern, which is of hi-accuracy, few parameter and simplicity, is developed.Considering the influence of various parameters on rheological behaviour, depressant adding condition is optimized and experimental evaluation on BEM-5P is conducted, which further unrip its mechanism on the Huabei crude. A corresponding viable pipe transportion programmel is also recommended.

本文基于原油流变学、非牛顿流体力学、石油化学、结晶学、原油管输工艺学等理论，以华北原油为研究对象，结合原油物性及实验影响因素分析，制定出实验研究的评价指标及实验方案；从连续介质力学宏观分析的角度，利用HAAKE RS600高端旋转流变仪开展了大量的室内实验，并运用微观研究方法，测定了油样的流变曲线和粘温曲线，建立了流变方程和粘温方程；通过对触变性机理和触变性流体特征的研究，首次对华北原油测定出滞回环曲线、结构破坏与恢复粘时曲线、剪切应力裂降过程曲线，并在理论研究和实验结果的基础之上，建立了能定量描述含蜡原油剪切应力裂降过程的新型三参数触变模式τ=τ_∞e~b/(t+c，该模型具有精度高、参数少、实验简便且适用性强的特点；通过对含蜡原油流变性的影响因素理论研究，开展了加剂条件优选及BEM-5P降凝剂室内评价实验，进一步揭示了降凝剂对华北原油作用机理，在此基础之上，提出了华北原油管输的可行性方案。

At the Scripps Research Institute, Raymond Stevens, PhD, professor of molecular biology and of chemistry, and Vadim Cherezov, PhD, a scientific associate in Stevens' lab, had been working for years to develop a completely automated method of crystallizing a receptor.

在Scripps研究所，分子生物学及化学教授，雷蒙德*斯蒂文斯博士和与斯蒂文斯实验室合作的Vadim Cherezov博士，为开发受体结晶的自动化方法已工作多年。

Vetiveria zizanioides ; structure ; fiber size ; relative crystallinity ; chemical composition

香根草；构造；纤维尺寸；相对结晶度；化学成分

The bio-structure, fiber morphology, relative degree of crystallinity, chemical composition, pH value and buffer capacity and other basic characteristics of Vetiveria zizanioides were studied as industrial raw material for straw-based panel production.

从开发利用香根草作为人造板工业原料的角度，研究其生物构造、纤维形态、相对结晶度、化学组成、pH与缓冲容量等基本特性。

inferior gold potassium of cyaniding ; complex ion ; chemical formula ; electrochemistry ; cyanide ; heavy crystallization

氰化亚金钾，又称亚金氰化钾，化学式为KAu2·2H2O，白色结晶或粉末，无水物的比重为3.45×103mg/m3，熔点200℃，溶于水，微溶于酒精，不溶于乙醚，有剧毒，主要用于纯金的电镀和用作化学试

In order to meet the need of high speed continuous casting,the moulding powder demands lower viscosity,lower crystallization temperature,lower intenerating and melting temperature,high melting rate,optimum basicity and chemical composition.

高速连铸保护渣的物化性能不同于普通连铸，应具有低粘度、低结晶温度、低软化及熔融温度、较快的熔化速度以及合适的碱度和化学成分等特性，以满足高拉速的需要，减少生产事故，提高铸坯质量。

Mondell engineering stone is high-technical decorating surface which is isomerized and polymerized from picked natural rimed stone ( the conpozation of Sio2 is over 99.99 percent). The stone is glittering, hard. It is not easy to fade or change the shape. It is not radiant and acid-fast. It is antibacterial and clean. It has good physical and chemic performance. This series is wildly used for its beautiful decoration in walls, floor, platform and so on. It combines features of natural stone and PMMA solid surface to get the rich and glittery colour.

蒙代尔工程石是采用精选的天然石结晶矿产为原料（石英砂Sio2的含量达到99.99%以上），在全自动生产线的高温高压状态下异构聚合而成的高科技装饰面材，具有晶莹剔透、硬度高、不变形、不退色、无辐射性、耐酸碱、易清洁、抗菌、卫生等优异的物理性能及化学性能，应用空间相当广泛，可应用于地面、外墙、台面等装饰自然美：真正的石材质感、兼顾天然石和亚克力人造石二者之优点，色彩丰富、晶莹剔透。

The crystal structure of two kinds of welds was compared, and the chemical composition of the welds were tested.

利用金相试验方法对两种焊接接头的结晶组织形貌进行了详细的对比和分析，并对焊接接头区域的化学组成进行了测试和分析。

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。