VERFAHREN ZUR HERSTELLUNG VON EXOZELLULAEREN BIOPOLYMEREN MIT VERDICKUNGSWIRKUNG FUER WAESSRIGE MEDIEN.

摘要

Prodn. of exocellular biopolymers (I) capable of thickening aq. media is effected by culturing (I)-producing microorganisms under aerobic conditions in an aq. nutrient medium present as the disperse phase of a w/o emulsion. The emulsion contains less than 50 vol.% of oil phase and is stabilised with a fatty acid dialkanolamide (II) as w/o emulsifier. The microorganism is a Xanthomonas sp. (II) is derived from a mono- or polyunsatd. fatty acid and is used in an amt. of 0.5-2 (esp. 0.7-1.2) wt.%. The oil phase is a liq. isoparaffin or a triglyceride oil, esp. an edible oil, and is present in an amt. of 30-40 vol.%. Fermentation is continued until the concn. of (I) is at least 5 wt.%.