화학공학소재연구정보센터
Journal of Bioscience and Bioengineering, Vol.89, No.3, 258-261, 2000
Fluid viscosity of Aureobasidium pullulans cultures obtained at two different initial pH values
Aureobasidium pullulans IAM 5060 grown in media with initial pHs of 6 and 7 differed in its production of exopolysaccharides (EPS). Under the latter condition, EPS of a high molecular weight was produced in an especially large amount. The viscosity of the culture broths and the EPS solutions obtained by removing the microbial cells exhibited a marked non-Newtonian and complex behavior depending on the measurement method. The nature of the viscosity of the fluids is explained by means of several structural models of their constitutive particles.