微球型壳聚糖胺基吸附剂的制备及性能

以壳聚糖为原料,采用反相悬浮交联的方法制取微球型壳聚糖颗粒,再进行羟丙基氯化及胺基化,制备了一系列新型壳聚糖胺基衍生物微球。衍生物的胺基含量明显提高,碱性增强。并初步考察其吸附牛血清白蛋白（ＢＳＡ）性能。可用作新固定化酶载体及生化分离材料。     

Study of rheological characterization off enugreek gum with modified maxwellmodel

1 INTRODUCTIONFenugreek,i.e.trigonella foenum-graecum,is an an-nual herbaceous plant of leguminosae,which arewidely planted in China.Fenugreek seed consists oftesta,endosperm and plumula cotyledon.Fenugreekgum is taken from endosperm,which contains morethan 60% galactomannans with the ratio of galac-tose to mannose 1:1.2.It is soluble in water,aque-ous acid and alkali,respectively,and insoluble in or-ganic solvents.It is a natural polysaccharide whichis composed of a linear backbone of 1-4 β linkedD-mannose units with 1-6 αlinked D-galactoseunits attached as side chains.Its molecular formulais (C_6H_(10)O_5)_n.H_2O.Its structure can be showed asFig.1.Its molecular weight is about 2.5 x 10~5to l.3 x 10~5 that is determined by measuring theviscosity.In practice,due to possessing the advan-tages of low friction resistance,low damage to the     

Rheological properties of novel viscoelastic micelle systems containing anionic-nonionic dimeric surfactant

The viscoelastic micelle systems formed by novel anionic-nonionic dimeric surfactant and conventional cationic surfactant cetyltrimethylammonium(1631) were studied.The viscoelasticity,thixotropy,flow curves and constitutive equation for the novel viscoelastic micelle systems were investigated.The results show that the micelle systems possess viscoelasticity,thixotropy,and shear thinning property.Some micelle systems possess hysteresis loops showing both viscoelasticity and thixotropy.It is proved that the flow curves are characterized by the co-rotational Jeffreys constitutive equation correctly.     

A THEORETICAL STUDY OF MASS AND HEAT TRANSFER IN FILM FLOW OF NONNEWTONIAN POWER LAW FLUIDS

The exact expressions of concentration and local or average Sherwood number,Sh or Sh for non-Newtonian fluids which obey the famous power law:τ={K|1/2(1/2)~(1/2)|~(n=1)}in which the flow index n takes any positive rational value,have been obtained by solving the differen-tial equation of diffusion together with the velocity distribution in the falling film flow.The use of Fourth-order Runge-Kutta method and Wegstien's iteration method by means of thecomputer yields results which are a series of values of dimensionless concentration O,local and averageSherwood number for n equal to 1/4,1/3,1/2,1/1.4,1/1.2,1,1.25,2.5,and ∞.When the flow indexn=1,i.e.for Newtonian fluids,the result agrees well with the data from the literature.     

淋降塔内非牛顿流体的传质研究

本文研究非牛顿幂律流体传质过程,实验采用淋降塔装置,测定高聚物溶液的传质速率.实验结果表明传质速率随温度和溶液流量增加而增大,还随压力和溶液稠度系数下降而增加.并应用相似论原理分析非牛顿幂律流体传质过程,得到柯尔本因子与雷诺数关系式j_m=BRe~B_1,由实验数据经线性回归得到B=2.2708×10~(-5),B_1=-0.7013相关系数0.99.     

水力旋风

本文系在1959年3月20日上海市化工局所召开的技术经验交流会上发言稿的基础上整理而成。就水力旋风在分级与增稠固-液悬浮液的作用原理、构造特点等作了综合叙述。并根据我们对水力旋风试探性试验中所摸索到的点滴经验,提出了若干看法和建议。最后,对水力旋风在化学工业应用的技术可能性作了探讨;建议将水力旋风作为处理悬浮微粒的新工具加以研究和使用。     

管道输送中最经济流速和界限流速的研究

本文分析了管道费用和流速的关系,获得计算经济流速和界限流速等的数学模型,并用计算机计算了各种情况下水的经济流速和界限流量。     

泡沫分离技术的实验研究——回收废液中的金

泡沫分离是一种新的分离技术,在国外研究工作已取得了不少成果.Jorne和Rubin在研究金属离子泡沫分离的基础上,提出的Goug chapman扩散双电层理论,阐述了利用相反电荷的金属离子与表面活性剂离子之间的静电吸引作用,达到金属离子的泡沫分离.Rubin和Lapp、Charewicz和Grives等人通过对泡沫分离金属离子的研究表明:pH值是一个重要的影响因素.同时,离子强度可以改变表面活性剂的选择性.Bruner和Stephan采用泡沫分离方法脱除洗涤剂厂排放的一级及二级污水中的表面活性剂,试验结果表明:塔式泡沫分离装置比槽式装置有更高的脱除率.     

利用固定化L-天冬酰氨酶进行血液净化治疗白血病的数学模型研究

Plasma was purified in an immobilized L-asparaginase column. The predicted results are in good agreement with experimental data. It is indicated that the mathematical model is suitable for the mass transfer and reaction of blood purification.