Rheological properties of extracellular polysaccharide, pestan, produced by Pestalotiopsis sp.

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Title
Rheological properties of extracellular polysaccharide, pestan, produced by Pestalotiopsis sp.
Author(s)
Gi Seok Kwon; S H Moon; S D Hong; H M Lee; T I MheenHee Mock Oh; Byung Dae Yoon
Bibliographic Citation
Biotechnology Letters, vol. 18, no. 12, pp. 1465-1470
Publication Year
1996
Abstract
The fluid behaviour of Pestan produced from Pestalotiopsis sp. KCTC 8637P was as a non-Newtonian fluid. The theological behaviour of Pestan solution was examined by Power-law model, Herschel-Bulkley model and Arrhenius equation. As the result, Pestan solution was pseudoplastic behaviour with yield stress. According to increase of Pestan concentration, its flow index was decreased. Thus, low concentrations of Pestan solution were well exposed pseudoplastic property. Apparent viscosity of 0.2% Pestan solution was 268.2 cP at 14.3 sec-1 and was higher about 2.8 times than that of Xanthan gum solution. Apparent viscosity of Pestan solution was stable over a wide pH and was maximum at pH 8. Also, consistency index of Pestan solution was very stable over wide temperature than that of Xanthan gum solution.
ISSN
0141-5492
Publisher
Springer
DOI
http://dx.doi.org/10.1007/BF00129356
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Cell Factory Research Center > 1. Journal Articles
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