Journal of Chemical Technology & Biotechnology最新文献_第8页

A kinetic model for partial oxidation of ethane to acetic acid on promoted VPO catalyst 促进型VPO催化剂上乙烷部分氧化制乙酸的动力学模型

Journal of Chemical Technology & Biotechnology Pub Date : 2000-12-01 DOI: 10.1002/1097-4660(200012)75:12<1160::AID-JCTB330>3.0.CO;2-#

A. Fakeeha, Y. Fahmy, M. Soliman, Saeed M. Alwahabi

引用次数: 7

Fast detection of high molecular weight substances in wastewater based on an enzymatic hydrolysis combined with the Arxula BOD sensor system 基于酶解结合Arxula BOD传感器系统的废水中高分子量物质的快速检测

Journal of Chemical Technology & Biotechnology Pub Date : 2000-11-01 DOI: 10.1002/1097-4660(200011)75:11<1080::AID-JCTB311>3.0.CO;2-#

K. Tag, Alex W. K. Kwong, M. Lehmann, Chiyui Chan, R. Renneberg, K. Riedel, G. Kunze

引用次数: 13

Secretion of heterologous and native proteins, growth and morphology in batch cultures of Aspergillus niger B1‐D at varying agitation rates 不同搅拌速率下黑曲霉B1 - D分批培养中外源和原生蛋白的分泌、生长和形态

Journal of Chemical Technology & Biotechnology Pub Date : 1999-08-01 DOI: 10.1002/(SICI)1097-4660(199908)74:8<821::AID-JCTB114>3.0.CO;2-#

A. Wongwicharn, L. Harvey, B. McNeil

{"title":"Secretion of heterologous and native proteins, growth and morphology in batch cultures of Aspergillus niger B1‐D at varying agitation rates","authors":"A. Wongwicharn, L. Harvey, B. McNeil","doi":"10.1002/(SICI)1097-4660(199908)74:8<821::AID-JCTB114>3.0.CO;2-#","DOIUrl":"https://doi.org/10.1002/(SICI)1097-4660(199908)74:8<821::AID-JCTB114>3.0.CO;2-#","url":null,"abstract":"The influence of bioreactor operational conditions on the micromorphology of batch cultures of Aspergillus niger B1-D, containing a hen egg white lysozome (HEWL) marker protein, was examined using computerised image analysis. Significant differences in micromorphology were observed with increased stirrer speed, with shorter organisms with shorter hyphal elements occurring as agitation speed increased, even though mean tip numbers were similar. This may explain the observed increase in the total extracellular protein, since the ratio of synthetic (tip) to non-synthetic zones became increasingly favourable. HEWL concentrations fell above 500rpm, probably due to the effects of DOT (dissolved oxygen tension) on the glucoamylase HEWL fusion. HEWL was susceptible to proteolytic degradation, by native proteases, during the autolytic phase. Such insights may indicate why a gene from one mould expressed in a close relative can give production levels equivalent to levels of native enzymes, while secretion of a gene from a 'distant' source, eg a higher eukaryotic gene, occurs at much lower levels.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"67 1","pages":"821-828"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86872587","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: 20

Combined biological and chemical oxidation of ferrous sulfate using immobilised Thiobacillus ferrooxidans 固定化氧化亚铁硫杆菌生物化学联合氧化硫酸亚铁的研究

Journal of Chemical Technology & Biotechnology Pub Date : 1999-06-01 DOI: 10.1002/(SICI)1097-4660(199906)74:6<562::AID-JCTB75>3.0.CO;2-#

M. Nemati, C. Webb

引用次数: 19

Removal of toxic metals from aqueous mixtures. Part 1: Biosorption 从含水混合物中去除有毒金属。第一部分:生物吸附

Journal of Chemical Technology & Biotechnology Pub Date : 1999-05-01 DOI: 10.1002/(SICI)1097-4660(199905)74:5<429::AID-JCTB62>3.0.CO;2-#

A. Zouboulis, E. Rousou, K. A. Matis, I. Hancock

引用次数: 87

Simulation and optimisation of integrated bioprocesses: a case study 综合生物过程的模拟和优化:一个案例研究

Journal of Chemical Technology & Biotechnology Pub Date : 1999-03-01 DOI: 10.1002/(SICI)1097-4660(199903)74:3<289::AID-JCTB26>3.0.CO;2-#

Yuhong Zhou, N. Titchener-Hooker

引用次数: 13

Simultaneous oxidative conversion and CO2 or steam reforming of methane to syngas over CoO–NiO–MgO catalyst 甲烷在co - nio - mgo催化剂上的同步氧化转化和CO2或蒸汽重整制合成气

Journal of Chemical Technology & Biotechnology Pub Date : 1998-12-01 DOI: 10.1002/(SICI)1097-4660(199812)73:4<345::AID-JCTB961>3.0.CO;2-#

V. Choudhary, A. S. Mamman

{"title":"Simultaneous oxidative conversion and CO2 or steam reforming of methane to syngas over CoO–NiO–MgO catalyst","authors":"V. Choudhary, A. S. Mamman","doi":"10.1002/(SICI)1097-4660(199812)73:4<345::AID-JCTB961>3.0.CO;2-#","DOIUrl":"https://doi.org/10.1002/(SICI)1097-4660(199812)73:4<345::AID-JCTB961>3.0.CO;2-#","url":null,"abstract":"CO2 reforming, oxidative conversion and simultaneous oxidative conversion and CO2 or steam reforming of methane to syngas (CO and H2) over NiO–CoO–MgO (Co: Ni: Mg=0·5: 0·5:1·0) solid solution at 700–850°C and high space velocity (5·1×105 cm3 g−1 h−1 for oxidative conversion and 4·5×104 cm3 g−1 h−1 for oxy-steam or oxy-CO2 reforming) for different CH4/O2 (1·8–8·0) and CH4/CO2 or H2O (1·5–8·4) ratios have been thoroughly investigated. Because of the replacement of 50 mol% of the NiO by CoO in NiO–MgO (Ni/Mg=1·0), the performance of the catalyst in the methane to syngas conversion process is improved; the carbon formation on the catalyst is drastically reduced. The CoO–NiO–MgO catalyst shows high methane conversion activity (methane conversion >80%) and high selectivity for both CO and H2 in the oxy-CO2 reforming and oxy-steam reforming processes at ⩾800°C. The oxy-steam or CO2 reforming process involves the coupling of the exothermic oxidative conversion and endothermic CO2 or steam reforming reactions, making these processes highly energy efficient and also safe to operate. These processes can be made thermoneutral or mildly exothermic or mildly endothermic by manipulating the process conditions (viz. temperature and/or CH4/O2 ratio in the feed). © 1998 Society of Chemistry Industry","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"17 1","pages":"345-350"},"PeriodicalIF":0.0,"publicationDate":"1998-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81392331","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: 52

Enzyme flow microcalorimetry—a useful tool for screening of immobilized penicillin G acylase 酶流动微量热法——一种筛选固定化青霉素G酰化酶的有效工具

Journal of Chemical Technology & Biotechnology Pub Date : 1998-09-01 DOI: 10.1002/(SICI)1097-4660(199809)73:1<31::AID-JCTB930>3.0.CO;2-#

A. Vikartovská-Welwardová, E. Michálková, P. Gemeiner

引用次数: 2

Stabilisation of β-glucosidase entrapped in alginate and polyacrylamide gels towards thermal and proteolytic deactivation 海藻酸盐和聚丙烯酰胺凝胶包裹的β-葡萄糖苷酶在热和蛋白水解失活方面的稳定性

Journal of Chemical Technology & Biotechnology Pub Date : 1998-09-01 DOI: 10.1002/(SICI)1097-4660(199809)73:1<7::AID-JCTB921>3.0.CO;2-#

N. Ortega, M. D. Busto, M. Perez-Mateos

引用次数: 23

A novel synthesis of high‐area alumina via H2O2‐precipitated boehmite from sodium aluminate solutions 用H2O2沉淀薄水铝石从铝酸钠溶液中合成高面积氧化铝的新方法

Journal of Chemical Technology & Biotechnology Pub Date : 1998-08-01 DOI: 10.1002/(SICI)1097-4660(199808)72:4<320::AID-JCTB911>3.0.CO;2-#

E. A. El-Katatny, S. Halawy, M. A. Mohamed, M. Zaki

{"title":"A novel synthesis of high‐area alumina via H2O2‐precipitated boehmite from sodium aluminate solutions","authors":"E. A. El-Katatny, S. Halawy, M. A. Mohamed, M. Zaki","doi":"10.1002/(SICI)1097-4660(199808)72:4<320::AID-JCTB911>3.0.CO;2-#","DOIUrl":"https://doi.org/10.1002/(SICI)1097-4660(199808)72:4<320::AID-JCTB911>3.0.CO;2-#","url":null,"abstract":"A novel procedure was devised, whereby crystalline boehmite, γ-AlO(OH), was efficiently precipitated from sodium aluminate solutions, NaAlO 2 (aq), following controlled addition of H 2 O 2 aqueous solution. The effects of the aluminate solution variables (viz. concentration, volume, caustic ratio, pH and temperature), as well as the H 2 O 2 /Al 2 O 3 molar ratio, on the amount and composition of the yield, were examined. Accordingly, optimal conditions for 98% recovery of the aluminium content of the parent aluminate solution were realized. The remaining NaOH can be recycled and used to extract further amounts of aluminium from bauxite (Bayer process). Thermal stability of the resulting boehmite was explored by thermogravimetry and differential thermal analysis. Accordingly, various calcination products of the boehmite were obtained at some selected temperatures in the range 400-1100°C and characterized by chemical analysis, X-ray powder diffractometry, and surface charge and specific area measurements. The results obtained indicated the synthesis of relatively high surface area transitional aluminas of industrial and catalytic merits.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"83 1","pages":"320-328"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89036375","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: 26