To obtain a reticulate cellulose product by cultivating a microorganism belonging to the genus Acetobacter and capable of producing cellulose in a liquid culture medium under conditions of cultivation under stirring at a specified average volumetric productivity to produce the cellulose product with a frequency of change from the cellulose producing form to the cellulose nonproducing form below a specified number.
A microorganism belonging to the genus Acetobacter of an aerobic bacterium is cultivated in a liquid culture medium under conditions of cultivation under stirring at an average volumetric productivity of at least 0.1 g/l/hr for at least 70 hr to produce a reticulate cellulose. A citric acid salt is added to the culture medium to keep the pH at 4 to 6, while a monosaccharide or disaccharide is used as a carbon source. The microorganism exhibits a frequency of change from the cellulose producing form to the cellulose nonproducing form of below 0.5% over 42 to 45 generations under conditions of cultivation under stirring. This cellulose product is produced in pellet form, not in continuous thin film form, has a three-dimensional network structure, and consists of filaments arranged in a width of 0.1-0.2 μm and connected to one another.
WONG HARRY (US)
BRUNER ROBERT (US)
JOHNSON DONALD CURTIS (US)
SHOEMAKER SHARON PAYNE (US)
NAOGI AMAR NATH (US)
ALONI YEHOSHUA (IL)
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