[Gibb's free energy as a index of the assimilation of carbohydrate sources by bacteria]

The author presents substantiation of the use of thermodynamic function--of free Gibbs' energy (--deltaG) for energy characteristics of enterobacteria periodic cultures on synthetic media. Examination of strains of E. coli K12P4X Hfr, E. coli PA-309, and Sh. newcastle 762S showed the --detlaG = f (N) curves to characterise the energy value of various carbohydrate sources more completely, and also permitted the choice of their optimal concentrations in synthetic media for each of the enterobacteria strain.