Abstract
AbstractPolysaccharide gum was made by fermentation with Xanthomonas campestris NRRL B‐1459 in a medium of glucose, minerals, and distillers' solubles. The effect of distillers' solubles on growth rate can be described by the familiar saturation equation. Although a quasistoichiometric relationship was observed between nitrogen utilization and growth, total nitrogen supply was not growth limiting, nor was polymer formation growth associated. Cell growth primarily took place in the early part of the fermentation; polysaccharide biosynthesis occurred throughout the fermentation. Glucose was converted to polysaccharide at a fairly constant yield, which was 70–80% of glucose consumed, under optimum conditions. The kinetic patterns observed indicate that multistage continuous fermentation will be suitable for polysaccharide production.
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