The Chemical Engineering Journal and the Biochemical Engineering Journal最新文献_第2页

Cell surface area as a major parameter in the uptake of cadmium by unicellular green microalgae 细胞表面积是单细胞绿微藻吸收镉的主要参数

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1997-01-15 DOI: 10.1016/S0923-0467(96)03091-6

A. Khoshmanesh, F. Lawson, I.G. Prince

引用次数: 45

A new approach to evaluate kinetic parameters and mass transfer coefficients in continuous stirred tank reactors. Application to antibiotic separation 一种评估连续搅拌槽式反应器动力学参数和传质系数的新方法。抗生素分离的应用

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1997-01-15 DOI: 10.1016/S0923-0467(96)03158-2

Sunil Nath, Vivek Shukla

{"title":"A new approach to evaluate kinetic parameters and mass transfer coefficients in continuous stirred tank reactors. Application to antibiotic separation","authors":"Sunil Nath, Vivek Shukla","doi":"10.1016/S0923-0467(96)03158-2","DOIUrl":"10.1016/S0923-0467(96)03158-2","url":null,"abstract":"<div><p>A new method is proposed to evaluate kinetic parameters and mass transfer coefficients for adsorption processes carried out in continuous stirred tank reactors. This method, employing a biphasic model, does not linearize <em>nonlinear</em> solute concentration versus time data, nor does it assume the existence of equilibrium in a typical <em>nonequilibrium</em> situation as is currently done. For a nonlinear adsorption isotherm, the coupled differential equations need to be solved numerically, but using an elegant analytical solution it is possible to determine rate constants and mass transfer coefficients in the case of nonlinear kinetics with a linear adsorption isotherm. This solution (biphasic model, linear isotherm) is obtained and compared with solutions incorporating (i) a linear model (linear isotherm) and (ii) a numerical solution (nonlinear isotherm) for recovery of the antibiotic novobicoin in stirred tank reactors. For novobiocin adsorption versus time data, use of the biphasic model results in a lower mean percentage error than either the linear model or the numerical simulation; further, it provides a far superior fit of short-time adsorption behavior. Hence, we strongly advocate that the biphasic model be routinely employed along with linear models and numerical simulations of Langmuir/Freundlich isotherms for interpretation of adsorption data.</p></div>","PeriodicalId":101226,"journal":{"name":"The Chemical Engineering Journal and the Biochemical Engineering Journal","volume":"65 1","pages":"Pages 63-69"},"PeriodicalIF":0.0,"publicationDate":"1997-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0923-0467(96)03158-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56188188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Analysis and comparison of biofilter models 生物滤池模型的分析与比较

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1997-01-15 DOI: 10.1016/S0923-0467(96)03101-6

S.M. Zarook, A.A. Shaikh

引用次数: 44

Enzymatic transformation of sinapine using polyphenol oxidase from Trametes versicolor. Effect of pH and temperature and model development 用墨苔多酚氧化酶转化皂素。pH和温度的影响及模型发育

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1997-01-15 DOI: 10.1016/S0923-0467(96)03157-0

K. Lacki, Z. Duvnjak

{"title":"Enzymatic transformation of sinapine using polyphenol oxidase from Trametes versicolor. Effect of pH and temperature and model development","authors":"K. Lacki, Z. Duvnjak","doi":"10.1016/S0923-0467(96)03157-0","DOIUrl":"https://doi.org/10.1016/S0923-0467(96)03157-0","url":null,"abstract":"<div><p>Sinapine, a choline ester of sinapic acid and a main component of the phenolic fraction of rapeseed meals, was enzymatically transformed by an enzyme secreted by a white rot fungus <em>Trametes versicolor</em>. A model based on the Theorell-Chance Bi-Bi mechanism that describes the effect of pH, temperature, substrates and enzyme concentrations on the initial reaction rate was developed. The model parameters were estimated from the data regarding the effect of pH and temperature on initial reaction rates using a two-step estimation procedure that was developed in this work. The model predicts experimental data fairly well, and is valid for any pH and temperatures ranges. The optimum pH and temperature of reaction determined experimentally and confirmed by the model are 4.24 and 50 °C, respectively. However, when the effect of temperature on the oxygen solubility is not considered, i.e. oxygen is not the limiting substrate, the model shows that the optimum temperature of reaction is 60 °C. A relation between the temperature and the optimum pH of reaction was proposed. The developed model was used to predict the dynamics of sinapine transformation. The results showed that the investigated enzymatic system includes additional enzymatic reactions between oxygen and the products of sinapine transformation.</p></div>","PeriodicalId":101226,"journal":{"name":"The Chemical Engineering Journal and the Biochemical Engineering Journal","volume":"65 1","pages":"Pages 27-36"},"PeriodicalIF":0.0,"publicationDate":"1997-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0923-0467(96)03157-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91755783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Modified PMMA monosize microbeads for glucose oxidase immobilization 用于葡萄糖氧化酶固定化的改性PMMA单粒微珠

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1997-01-15 DOI: 10.1016/S0923-0467(96)03156-9

Volga Bulmuş, Hakan Ayhan, Erhan Pişkin

{"title":"Modified PMMA monosize microbeads for glucose oxidase immobilization","authors":"Volga Bulmuş, Hakan Ayhan, Erhan Pişkin","doi":"10.1016/S0923-0467(96)03156-9","DOIUrl":"10.1016/S0923-0467(96)03156-9","url":null,"abstract":"<div><p>Glucose oxidase (GOD) was immobilized onto modified polymethylmethacrylate (PMMA) microspheres by covalent bonding. Monosize PMMA microbeads with 1.5 μm diameter were produced by dispersion polymerization of methylmethacrylate by using polyvinyl alcohol as a stabilizer. Hydroxyl groups on the microbeads were first converted to aldehyde groups by periodate oxidation. Three amino compounds, namely ammonium hydroxide, ethylene diamine and hexamethylene diamine were incorporated through the aldehyde groups. Then, GOD molecules were immobilized through the spacer-arms by using glutaraldehyde. The highest amount of immobilization and activity were obtained in which hexamethylene diamine was used as the spacer-arm with 14 atom length, and were 2.1 mg g<sup>−1</sup> polymer and 129 IU g<sup>−1</sup> polymer, respectively. The optimal conditions for GOD immobilization were obtained as follows: pH, 6.0; temperature, 30 °C; immobilization time, 60 min; and GOD initial concentration, 0.10 mg ml<sup>−1</sup>. The optimal conditions for the GOD-immobilized PMMA microbeads were at pH 6.0 and at a temperature of 30 °C. The <em>K</em><sub>m</sub> and <em>V</em><sub>max</sub> values of the GOD-immobilized PMMA microbeads were, 13.79 mM and 26.31 mM min<sup>−1</sup> calculated by non-linear regression, respectively.</p></div>","PeriodicalId":101226,"journal":{"name":"The Chemical Engineering Journal and the Biochemical Engineering Journal","volume":"65 1","pages":"Pages 71-76"},"PeriodicalIF":0.0,"publicationDate":"1997-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0923-0467(96)03156-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56188173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 88

An investigation into the possible effects of proteolysis on IgM enzyme-linked immunosorbent assay titres 蛋白水解对IgM酶联免疫吸附测定效价可能影响的研究

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1997-01-15 DOI: 10.1016/S0923-0467(96)03115-6

Papagudi Sriram, Nicolas Kalogerakis , Leo A. Behie

引用次数: 1

Study of dead zone and spout diameter in shallow spouted beds of cylindrical geometry 圆柱形浅喷流床的死区和直径研究

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1996-12-01 DOI: 10.1016/S0923-0467(97)80006-1

M.J. San José, M. Olazar, R. Llamosas, M.A. Izquierdo, J. Bilbao

引用次数: 18

Applied mathematics and modeling for chemical engineers 化学工程师应用数学与建模

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1996-12-01 DOI: 10.1016/S0923-0467(96)85020-2

R.M. Nedderman

引用次数: 109

Cumulative subject index of volumes 60–64 第60-64卷的累积主题索引

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1996-12-01 DOI: 10.1016/S0923-0467(96)85025-1

引用次数: 0

Advances in multiphase flow 1995 多相流研究进展1995

The Chemical Engineering Journal and the Biochemical Engineering Journal Pub Date : 1996-12-01 DOI: 10.1016/S0923-0467(97)80008-5

P.B. Whalley

引用次数: 6