热力学

ABSTRACT The decomposition temperature and heat of cefazolin sodium pentahydrate were measured by the differential scanning calorimetry technique. Its solubility data in various mixed solvents of water ethanol, water acetone, and water 2 propanol were obtained by the laser method and fitted by the exponential model.

在溶液结晶过程中结晶物系的物理化学性质(如溶解度、熔解热、介稳区等)对结晶操作、结晶收率、产品纯度和产品的粒度分布均有较大影响，结晶物系的热力学性质是结晶动力学和结晶工艺研究的基础。

ABSTRACT The decomposition temperature and heat of cefazolin sodium pentahydrate were measured by the differential scanning calorimetry technique. Its solubility data in various mixed solvents of waterethanol, wateracetone, and water2propanol were obtained by the laser method and fitted by the exponential model.

在溶液结晶过程中结晶物系的物理化学性质(如溶解度、熔解热、介稳区等)对结晶操作、结晶收率、产品纯度和产品的粒度分布均有较大影响，结晶物系的热力学性质是结晶动力学和结晶工艺研究的基础。

Finally,the crystallization metastable zone of cefazolin sodium pentahydrate in water and the mixture of water and 2propanol at different temperatures was determined by the laser method.Valuable thermodynamics data for the industrial manufacture of cefazolin sodium pentahydrate were obtained.KEY WORDS Cefazolin sodium pentahydrate;Crystallization;Thermodynamics;Metastable zone

本文测定了5~35℃范围内头孢唑林钠在不同配比的水乙醇、水丙酮、水异丙醇混合溶剂中的溶解度数据，采用热分析仪测定了头孢唑林钠的差热分析数据，推导了头孢唑林钠溶解度模型，为头孢唑林钠的结晶分离提供了热力学数据。

Crystallization thermodynamics of cefazolin sodium pentahydrate ABSTRACT The decomposition temperature and heat of cefazolin sodium pentahydrate were measured by the differential scanning calorimetry technique.

在溶液结晶过程中结晶物系的物理化学性质(如溶解度、熔解热、介稳区等)对结晶操作、结晶收率、产品纯度和产品的粒度分布均有较大影响，结晶物系的热力学性质是结晶动力学和结晶工艺研究的基础。

Valuable thermodynamics data for the industrial manufacture of cefazolin sodium pentahydrate were obtained.KEY WORDS Cefazolin sodium pentahydrate; Crystallization; Thermodynamics; Metastable zone

本文测定了5～35℃范围内头孢唑林钠在不同配比的水乙醇、水丙酮、水异丙醇混合溶剂中的溶解度数据，采用热分析仪测定了头孢唑林钠的差热分析数据，推导了头孢唑林钠溶解度模型，为头孢唑林钠的结晶分离提供了热力学数据。

This thesis, basing on the finite temperature field theory and its effec tive perturbative method, has done some research in the influences from collective effect of QGP to its thermodynamic potential and certain important related problems.

本文在有限温度场论和其有效微扰方法的基础上，研究了夸克胶子等离子体的集体效应对系统热力学势的影响及其相关的若干重要问题。

The scale inhibition mechanism of PESA was proposed on the basis of characterization of transformation of calcium carbonate crystal by means of X-ray Diffraction and scanning electron microscopy. The effect of temperature on corrosion inhibition efficiency of PESA was investigated and the Bockris substitution model is proposed to study the thermodynamics of inhibiting process of PESA. The calculation results show the adsorption of PESA on carbon steel is a spontaneous exothermic process with the increase of entropy.

通过X射线衍射和扫描电镜分析手段研究了聚环氧琥珀酸加入前后碳酸钙垢晶型的变化，在此基础上探讨了聚环氧琥珀酸的阻垢机理；考察了温度对聚环氧琥珀酸缓蚀性能的影响，根据Bockris置换模型，计算出中性水质中聚环氧琥珀酸在碳钢表面吸附的热力学函数，计算结果表明：聚环氧琥珀酸在碳钢表面的吸附是一个放热、熵增、自动发生的过程。

The occurrence of deleterious alkali-carbonate reaction and performance of certain aggregates were determined by detailed petrographic examination of the aggregates in destructive concrete'structures.

在对材料制备过程的研究中，通过对溶胶—凝胶过程及干凝胶不同烧成温度的物相变化的研究，结合热力学函数方法的计算结果，提出了多组份溶胶的形成过程、溶胶的干燥过程、凝胶的烧成过程中的主要物相的生成反应。

Based on physicochemistry,work and heat in the processes of irreversible cell were discussed by thermodynamical method.

在基础物理化学的基础上，用热力学方法讨论了不可逆电池过程的功和热，给出了计算公式，并推广到无副反应的电解过程。

In this paper the process equation of Van der Waals polytropic process is derived and energy transformation of Van der Waald Gas in the Thermodymic procss is discussed.

导出了范氏气体多方过程的过程方程，并讨论了范氏气体的热容量，多方指数及在各热力学过程中的能量转化情况。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。