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Rate and yield relationships in the production of xanthan gum by batch fermentations using complex and chemically defined growth media
Author(s) -
Pinches Anthony,
Pallent Leslie J.
Publication year - 1986
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260281006
Subject(s) - yield (engineering) , xanthan gum , nitrogen , chemistry , fermentation , biomass (ecology) , food science , growth rate , organic chemistry , mathematics , thermodynamics , biology , agronomy , geometry , rheology , physics
Rate and yield information relating to biomass and product formation and to nitrogen, glucose and oxygen consumption are described for xanthan gum batch fermentations in which both chemically defined (glutamate nitrogen) and complex (peptone nitrogen) media are employed. Simple growth and product models are used for data interpretation. For nitrogen sources, rate and yield parameter estimates are shown to be independent of initial nitrogen concentrations. For stationary phases, specific rates of gum production are shown to be independent of nitrogen source but dependent on initial nitrogen concentration. The latter is modeled empirically and suggests caution in applying simple product models to xanthan gum fermentations.