On the evaluation of diffusivities in gels using the diffusion cell technique
文献类型：期刊论文
| 作者 | Zhang, W; Furusaki, S |
| 刊名 | biochemical engineering journal
 |
| 出版日期 | 2001-11-01 |
| 卷号 | 9期号:1页码:73-82 |
| 关键词 | diffusion cell alginate gel diffusion immobilized cells the quasi-steady-state method the time-lag method |
| 英文摘要 | modeling of the gel-immobilized cell system requires accurate measurement of diffusion coefficients. three methods of the quasi-steady-state (qss) method, the time-lag (tl) method and a variant quasi-steady-state (vqss) method were critically assessed and compared for the evaluation of diffusivities using the diffusion cell technique. experimental data from our laboratory were used for the analysis of the influence of crucial theoretical assumptions not being fulfilled in each method. the results highlighted a risk in obtaining highly variable diffusion coefficients by not validating the qss and the accuracy of the measurements. in the tl method, the estimation of diffusivities based on the plot intercept that was mostly used in the literature, results in a many fold lower value when compared to that based on the plot slope. the comparison with the qss and vqss methods confirmed similar diffusivity obtained by the tl method based on the plot slope. it thus suggested that the correct estimation of diffusivities by the tl method could be based on the plot slope only. furthermore, the errors associated with the solute mass in the gel, the sample withdrawal and the non-negligible concentration changes in the chambers were also discussed. it is concluded that diffusion cell technique has to be employed cautiously for a correct evaluation of diffusivities. (c) 2001 elsevier science b.v. all rights reserved. |
| WOS标题词 | science & technology ; life sciences & biomedicine ; technology |
| 类目[WOS] | biotechnology & applied microbiology ; engineering, chemical |
| 研究领域[WOS] | biotechnology & applied microbiology ; engineering |
| 关键词[WOS] | calcium alginate membranes ; lactic-acid fermentation ; immobilized cells ; mass-transfer ; malic-acid ; coefficients ; glucose ; model ; layers ; beads |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000172057700010 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/84669]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Flinders Univ S Australia, Sch Med, Bedford Pk, SA 5042, Australia 2.Chinese Acad Sci, Dalian Inst Chem Phys, Marine Bioprod Engn Grp, Dept Biochem Engn, Dalian 116023, Peoples R China 3.Kyushu Univ, Dept Chem Syst & Engn, Fukuoka 8128581, Japan |
| 推荐引用方式 GB/T 7714 | Zhang, W,Furusaki, S. On the evaluation of diffusivities in gels using the diffusion cell technique[J]. biochemical engineering journal,2001,9(1):73-82. |
| APA | Zhang, W,&Furusaki, S.(2001).On the evaluation of diffusivities in gels using the diffusion cell technique.biochemical engineering journal,9(1),73-82. |
| MLA | Zhang, W,et al."On the evaluation of diffusivities in gels using the diffusion cell technique".biochemical engineering journal 9.1(2001):73-82. |
入库方式： OAI收割
来源：大连化学物理研究所
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