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KMID : 0903519960390030165
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1996 Volume.39 No. 3 p.165 ~ p.171
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Studies on the Rheology of the Biopolymer produced by Bacillus sp . K - 1 Strain and its Mutants
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Abstract
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The rheological properties of biopolymers produced by Bacillus sp. K-1 and its mutant strains(KM-21, KM-83) were studied. Apparent viscosity of biopolymers decreased as rising the temperature. The biopolymer produced by KM-21 strain showed 1.7 times low viscosity, 2.7 times low viscosity by K-1 and 1.9 times low viscosity try KM-83 at 80℃ compared with at 20℃ respectively. The viscosity of biopolymer solution also increased with increasing the polymer concentration and showed pseudoplastic characteristics which is high temperature dependency in all concentration. The change of the biopolymer viscosity on the pH showed the highest value at the pH 7.0 and it showed lower at acidic condition than at alkaline condition comparatively.
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