2. Materials and methods
2.1. Microorganisms
Pure cultures of the yeasts P. angusta VKM Y-2518, P. angusta VKM Y-1397, A. adeninivorans VKM Y-2677, D. hansenii VKM Y-2482, C. boidinii VKM Y-2356, as well as of the bacteria G. oxydans subsp. industries VKM B-1280 were used to form co-cultures. The cultures were obtained from the All-Russian Collection of Microorganisms, FSBIS G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences.