Abstract
Cultures of Cellulomonas uda were monitored under both aerobic and anaerobic conditions using three commercially available celluloses with varying degrees of crystallinity. In all cases, a high level of cellulose was metabolized and the same maximum carboxymethylcellulase activity (2.6 IU/mg of cellular protein) was observed. Measurement of the crystalline index of celluloses during cellulose growth revealed that the amorphous and crystalline regions were solubilized simultaneously. Investigation of the solubilization rate showed that a decline occurred when a considerable amount of cellulose still remained in the medium. Hypotheses were suggested to explain the biphasic pattern of the kinetics obtained.
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