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题名: Behavior of microbial growth and metabolism in alginate-chitosan-alginate (ACA) microcapsules
作者: Qi, WT;  Ma, J;  Yu, WT;  Xie, YB;  Wang, W;  Ma, XJ
关键词: ACA microcapsule ;  microencapsulated culture ;  Gompetz model ;  Richards model
刊名: ENZYME AND MICROBIAL TECHNOLOGY
发表日期: 2006-03-02
DOI: 10.1016/j.enzmictec.2005.10.003
卷: 38, 期:5, 页:697-704
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology
研究领域[WOS]: Biotechnology & Applied Microbiology
英文摘要: Cell microencapsulation is one of the promising biotechnological processes for immobilized cell culture. In this work, Escherichia coli and Saccharomyces cerevisiae cells were entrapped in alginate-chitosan-alginate (ACA) microcapsules. The behavior of microencapsulated and nonencapsulated free cells were studied and simulated by mathematical models. The Gompertz and Richards function were modified and compared to describe the growth and metabolism of microencapsulated and free microbial cells for a better understanding of the growth and its optimization. The results showed that both of the modified Gumpertz and Richards model could be used to describe the growth and metabolic process in ACA encapsulated culture as well as in free culture. Particularly, the modified Richards model was more suitable in describing the consumption of the controlling substrate due to the additional parameter, In, which described the shape of the three-parameter functions. The experimental data and the models highlighted that ACA microencapsulated culture could reach a higher maximum biomass concentration and a higher maximum biomass growth rate than in free culture. It is indicated that the ACA microcapsule could be used in immobilized microorganism culture, which offered favorable microenvironment for cell growth. The effects of status of ACA microcapsule cores on the cell growth and metabolism were further investigated. The results showed that there was no significant difference in the growth and metabolism of microencapsulated cells whether the cores of the microcapsules were solid or liquefied. And the optimized initial cell density was 3 x 106 cells mL(-1) of microcapsule based on the models. (c) 2005 Elsevier Inc. All rights reserved.
关键词[WOS]: IN-VITRO ;  ARTIFICIAL CELLS ;  DEGRADATION ;  BIODEGRADATION ;  DELIVERY ;  CULTURE ;  MODELS ;  BEADS ;  BATCH ;  VIVO
语种: 英语
WOS记录号: WOS:000235133500017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139999
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Biomed Mat Engn, Dept Sci & Technol, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Qi, WT,Ma, J,Yu, WT,et al. Behavior of microbial growth and metabolism in alginate-chitosan-alginate (ACA) microcapsules[J]. ENZYME AND MICROBIAL TECHNOLOGY,2006,38(5):697-704.
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