固定化酵母在使用过程中存在的问题

介绍在使用固定化酵母工艺中存在的易染菌、残糖高、使用周期短等问题.     

形状记忆合金螺旋弹簧的设计方法

介绍了形状记忆合金螺旋弹簧的设计原理,方法及发展现状,对三种常用的设计方法进行了讨论。     

原料颗粒对磷酸钙骨水泥水化硬化过程的影响

系统地研究了原料颗粒对磷酸钙骨水泥（ｃａｌｃｉｕｍｐｈｏｓｐｈａｔｅｃｅｍｅｎｔ,ＣＰＣ）水化硬化过程的影响规律,以等摩尔的磷酸四钙（ｔｅｔｒａｃａｌｃｉｕｍｐｈｏｓｐｈａｔｅ,ＴＥＣＰ）和无水磷酸氢钙（ｄｉｃａｌｃｉｕｍｐｈｏｓｐｈａｔｅａｎｈｙｄｒｏｕｓ,ＤＣＰＡ）的混合物为ＣＰＣ粉末作为研究对象,ｐＨ值变化表明,ＣＰＣ水化控制步骤在于ＤＣＰＡ的溶解,降低ＤＣＰＡ的粒径会国快ＣＰＣ的水化反应速     

Shape selectivity as a function of pore size in epoxidation of alkenes with supported titanium catalysts

Reactant shape selectivity of supported titanium catalysts for epoxidation of cyclohexene and 2-hexene has an excellent correlation with the pore diameter of the catalysts. With titanosilicate the preference to cis isomer epoxidation is small compared to TiO₂-SiO₂ probably because of the restriction of its diffusion imposed by the zeolite micropore structure.     

Belgian Experiences in the Ozonization of Water

After reviewing the uses of ozone in the preparation of drinking water, high purity water for Pharmaceuticals industries, and swimming pools throughout Belgium, a discussion of technological developments made at the Tailfer plant (serving Brussels) concerning the uses of ozone is presented. These subjects include analytical and monitoring techniques developed for ozone, procedures for ozone contacting employed at this plant, treatment of ozone contactor off–gases, and the use of oxygen–enriched process gas to produce supplemental amounts of ozone required periodically. Capital and operating cost data are presented.     

再生纸造纸污水的物理化学法快速净化与循环回用

介绍物理化学法快速净化高浊度工业污水工艺技术和本净水器结构设计原理,重点介绍再生纸造纸污水净化和回用工艺技术的机理及应用实践。证明物化法混凝净化技术与流体力学设计技术的巧妙结合能成功地处理高浊度无机污水和高浓度有机污水,实现工业用水闭路循环。     

Rate of adsorption to and desorption from a langmuir surface: The case of zero activation barrier to adsorption without dissociation

Many rate constants of elementary steps on single crystals have been measured. Their pre-exponential factors can now be compared to those calculated by transition state theory. Such a calculation is presented in this Letter with due attention to microscopic reversibility, standard states, and configurational entropy.     

Synthese du furyl-2 oxiranne en milieu hétérogène solide-liquide faiblement hydrate: Determination du régime de production,expression de la loi cinétique

Optimum conditions for scaling up the synthesis of furyl-2 oxyrane from furfural have been determined. A continuous stirred tank reactor proved the most efficient configuration for the production of the oxirane. The kinetic model makes it possible to predict the yields of epoxide per unit volume and unit time.     

Reactor design from batch data by a direct graphical method

A graphical method for reactor design is presented which uses the plot of concentration vs. time. This method can be used to compare stirred tank, plug flow and recycle reactors as well as various reactor combinations. With Monod Kinetics the concept of wash-out can be illustrated. A brief comparison with other graphical methods is made.     

特殊原生成因煤的特性和分布研究

为实现特殊煤种的合理利用,选择树皮残植煤、角质残植煤、树脂残植煤、孢子残植煤和腐泥煤5种典型的特殊原生成因煤为研究对象,系统研究其性质特殊性,调查5种煤在我国的分布范围及资源量(储量),从能源和工艺2方面讨论了原生成因煤的开发利用价值,并从基础研究—勘查—综合利用等多途径,提出了特殊原生成因煤的合理利用建议。结果表明,特殊原生成因煤具有高挥发分、高氢含量和高H/C原子比等特点,且具有很好的生烃潜力。特殊原生成因煤分布在一定成煤期的部分煤层中。特殊原生成因煤的开发利用潜能很大。应加强基础研究,深入分析特殊原生成因煤的特殊性质,查清资源量,结合我国发展和需求,进行战略性的、持续性的综合利用研究。