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Current Issue
2000 Vol.17 Issue.2,
Published 2000-03-15
Article
Article
0
Biomolecular Self-assembling Materials
YUAN Xu bo 1,MIAO Chun xiu 2,YUAN Yan bo 2,SONG Yan qiu 1, SHENG Jing 1,MA Ji tao 1
Research on self assembling biomolecular materials is an exciting new discipline lying at the intersection of molecular biology,the physical sciences and materals engineering.In this paper,the concept and characteristic of biomolecular self assembling materials were described.The development of complex fluids and liquid crystals,surfactant based self assembly,polymers and molecular thin films and their contribution to the control of modern materials synthesis and processes were addressed.
2000 Vol. 17 (2): 0-0 [
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Research on the Simulation of Adsorption Process
LIU Jian ming,GUAN Yi,WANG Ying ye,QIN Yong ning
Computer simulation,a new research method introduced in the research of adsorption process,was briefly described.The adsorption of ammonia on carbon particles was simulated with a Monte Carlo method to make the calculated result more close to the real process.Results consistent with that of the real process was gotten.
2000 Vol. 17 (2): 0-0 [
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1414
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Evaluation of the Heat Transfer Parameters for Fixed Beds The Length Dependence of Heat Transfer Parameters
ZHAO Qing guo 1,LIAO Hui 2,LI Shao fen 2
This paper presents experimental investigations on the heat transfer parameters for fixed beds.Analyses show that the length dependence of heat transfer parameters reflects the failure of two dimensional homogeneous model in predicting the temperature distribution in the thermal inlet section of the bed,and can not be compensated for by introducing axial conductive term into the model or by taking the inlet boundary condition of parabola type.The axial conductive term makes no contribution to the evaluation of heat transfer parameters or to the prediction of temperature profiles in fixed beds.So the PF model is superior to the ADPF model for simplicity in calculation.These conclusions suggest that the reliable heat transfer parameters must be obtained by taking asymptotic values among those under different bed lengths.
2000 Vol. 17 (2): 0-0 [
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1574
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Study on Microbial Electrode for Real Time Monitoring Used in Wastewater Biotreatment Engineering(Ⅰ) ——Choice of Dominat Enzyme and Progresses of Aerobic Biotreatment
WU Jun xia 1,WU Yang 1,WANG Jia qi 1,LU Ming xiang 1,SONG Ya wen 2,JI Min 2
In this paper,a new type microbial electrode by immobilizing the microbiomass,which is used to detect the activity of the microbiomass in wastewater biotreatment,has mainly been studied.Submit an origiral idea,based on which,the activity of the dominant enzyme was used to represent the whole microbia's activity.The existence and species of the dominant enzyme in the microbial living in different kinds of wastewater were certified based on research in areobic microbial film,and it was also found that the activity of the dominant enzyme changed,as soon as its living environment had been changed.The relationship between the volumetic load removal capacity and the acivity of electrode has been investigated.The results show the feasibility of using microbial electrode in wastewater biotreatment engineering.
2000 Vol. 17 (2): 0-0 [
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2498
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Study on the Synthesis of Water Absorbent Polyacrylamide by Inverse Suspension Polymerization
QIU Hai xia 1,LI Jin jie 2
A high water absorbent polyacrylamide was obtained by inverse suspension polymerization using Span60 as dispersion agent.The conditions of alkaline hydrolysis have great effects on water absorbency.The average diameter of the bead products in 290 μm,the deionized water absorbability and mineral absorbability were 220 and 180,respectively.
2000 Vol. 17 (2): 0-0 [
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Influence of Multi-Gas-Inlets in Shallow Spouted Bed on Particles' Coating
XU Xiao ping,ZHU Jun guo,YANG Bing,ZHANG Bing zhong,PAN Jin sheng
A new shllow spouted bed with multi gas inlets used in particles' coating is introduced here.The distribution of gas inlets and reacting gas in the spouted bed is investigated.The uniformity of coating layer and distribution of particles' diameter are increased by controlling reacting zone.
2000 Vol. 17 (2): 0-0 [
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1322
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The Application of Generalized Predictive Control in the Production of Vitamin C
TANG Yan yan,BAO Ying,XUE Lü zhong
According to the process technology of vitamin C production and the requirements of its control,an implicit algorithm of self tuning generalized predictive control and its corresponding set of program were developed and put into use.The time delay characteristic of the production process was taken into accout,the output predictive error weighting matrix was introduced into the cost function,and hence can be solved satisfactorily the control problem of the vitamin C production process which was characteristic of long time delay and slow time varying.
2000 Vol. 17 (2): 0-0 [
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Experiment and Calculation for the Separation of Hexane Methylcyclopentane with Extractive Distillation method
LIN Jun,GU Zheng gui,Si Ling
Separation process of hexane methylcyclopentane with extractive distillation method was simulated by computer,and a tentative experiment was did with the help of the caluclated rdsuts.There is a good agreement between the calculated results and the experimental data.
2000 Vol. 17 (2): 0-0 [
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Synthesis of N,N′-bis(trimethyl silyl)urea
LI Yong gang 1,LIU Dong zhi 1,QU Hong mei 1,MENG Dong yan 2
The synthesis of N,N′ bis(trimethyl silyl)urea from trimethyl chlorosilane was mainly discussed.The reaction parameters including catalysts,temperature and molar ratio were optimized.Under the optimum condition,the yield of N,N′ bis(trimethylsilyl)urea was 57% on the basis of trimethyl chlorosilane.
2000 Vol. 17 (2): 0-0 [
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Study on Stabilization of Monocrotophos Emulsifiable Concentrate Stored in a Thermal Condition
BI Fu chun 1,WU Guo xu 2
The decomposition value of monocrotophos stored in a thermostat at 54℃ is 18 94% when the solvent of monocrotophos formulation consists ethanol.However when the solvent is isopropyl alcohol or non polar solvent the decomposition value of monocrotophos is about 5% in the same condition.
2000 Vol. 17 (2): 0-0 [
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Study and Design on Refined Process of 2,6-Di-tert-Butyl-4-Methylphenol
JIA Shao yi,ZHAO Jin duo,LI Zong tang,SUN Yong li
The refined process of 2,6 di tert butyl 4 methylphenol is studied by means of batch distillation and the design of technological process on the basis of the result is completed.The study and design results are significative of engineering design.
2000 Vol. 17 (2): 0-0 [
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Research Advances in Reversed Micellar Extraction Equipment
ZHOU Lu fang,DONG Xiao yan,BAI Shu,SUN Yan
This article reviews the research advances in the extractors for the reversed micellar separation of proteins.In accordance with the operation modes and contactor configuration,these contractors are categorized into membrane based extractors,centrifuge extractors,mixer settler and column extractors.The advantages and disadvantages of each type of the extractors are discussed.It is pointed out that further fundamental studies on the extractors are necessary,and novel extractors suitable for reversed micellar separation of protein should be developed.
2000 Vol. 17 (2): 0-0 [
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Progress in the Study of GroE assisting the Reactivation of Protein
LIU Xiao guang,DONG Xiao yan,ZHOU Lu fang
The characterization,structure and reactive principle of molecular chaperonin are summarized in thie paper. The recent application of molecular chaperonin in the process of protein reactivation is also reviewed.
2000 Vol. 17 (2): 0-0 [
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