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The cultural conditions for bacterial exopolysaccharide production by Agrobacterium radiobacter were optimised by response surface methodology (RSM) to maximise the viscosity of the broth and the yield of the polysaccharide. A study of complex interactions among sucrose concentration (0.5-5.5 g%), inoculum concentration (1-15%, v/v) and pH (4-8) was carried out using central composite design of experiments...
Xanthomonas campestris cells present in xanthan fermentation broth were lysed by enzymes secreted by Trichoderma koningii. Protease which appeared responsible for cell lysis was produced by the fungus in solid-state fermentation of wheat bran optimally at pH 7 and 30 o C in 72 h. The culture filtrate, having protease in addition to other extracellular enzymes, was used as such to clarify xanthan...
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