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- W2000514185 abstract "The effect of the addition of detergents Tween 40, Tween 80, Chaps, and Triton X-100 on xanthan fermentation was evaluated in shake flasks. All assessed surfactants, when added after 24 h of culture, improved final xanthan gum concentration compared with the control which contained no detergent. Triton had the most important effect, producing 1.45-fold the gum produced in the absence of detergent. A time course of cultures developed in a 2-1 fermentor revealed that the use of Triton led to higher oxygen concentrations during fermentation compared with the culture with no detergent. Observations under the microscope revealed that the bacterial cells were smaller than those seen in the absence of the detergent. Compared at the same xanthan concentration and ionic strength, the diluted broths of fermentations containing Triton were more viscous than those of a control fermentation. This suggested that the use of Triton affected factors determining the rheological quality of the polymer such as the molecular weight. The detergent, when added a posteriori to xanthan broths, did not significantly affect the viscosity profiles. Since no severe foaming was observed as a result of detergent addition, the use of small amounts of this surfactant is a promising way for improving xanthan fermentation, thereby allowing higher xanthan titers and a high quality xanthan gum to be obtained." @default.
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- W2000514185 title "Detergents improve xanthan yield and polymer quality in cultures of Xanthomonas campestris" @default.
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- W2000514185 doi "https://doi.org/10.1016/0141-0229(95)00215-4" @default.
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