Vladimir A. Samoilenko

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The replacement of chemical synthesis by environmentally friendly energy-efficient technologies for production of valuable metabolites is a principal strategy of developing biotechnological industry all over the world. In the present study, we develop a method for α-ketoglutaric acid (KGA) production from rapeseed oil with the use of Yarrowia lipolytica(More)
The process of succinic acid (SA) production represents the combination of microbial synthesis of α-ketoglutaric acid from rapeseed oil by yeast Yarrowia lipolytica VKM Y-2412 and subsequent decarboxylation of α-ketoglutaric acid by hydrogen peroxide to SA that leads to the production of 69.0 g l−1 of SA and 1.36 g l−1 of acetic acid. SA was isolated from(More)
The production of α-ketoglutaric acid by yeast Yarrowia lipolytica VKMY-2412 from ethanol and its subsequent chemical conversion to succinic acid (SA) were investigated. A highly effective and environmentally friendly process of α-ketoglutaric acid production was developed using a special pH-controlling strategy, in which the titration of the culture broth(More)
Production of d S-threo-isocitric acid (ICA) by yeast meets serious difficulties since it is accompanied by a simultaneous production of citric acid (CA) in significant amounts that reduces the yield of desired product. In order to develop an effective process of ICA production, 60 yeast strains of different genera (Candida, Pichia, Saccharomyces,(More)
We studied the biosynthesis of isocitric acid from rapeseed (canola) oil by the yeast Yarrowia lipolytica and its regulation. We determined a fundamental possibility for directed biosynthesis of isocitric acid by Y. lipolytica yeast, with only minimal amounts of citric acid byproduct, when grown on a medium containing canola oil. Wild type strains of Y.(More)
A physical map of plasmid pSM1 has been compiled as a result of restriction analysis of pBSMI isolated from the cells of cyanobacterium Plectonema boryanum 465. A comparative analysis of the restriction sites localization in DNA of plasmid pSM1 with site topology of plasmids pGL3 of P. boryanum and pPF1 of Phormidium foveolarum indicates to high degree of(More)
It was shown in experiments carried out on cyanobacterium P. boryanum, that when cells are incubated in a buffer with low concentrations of nonion detergent (0.1%, Triton X-100) one can observe the DNAse activity release into the medium. The methods of supersound desintegration of cells and following gradient centrifugation of the cell-free extracts were(More)
Three methods of plasmids isolation from the cells of cyanobacteria: Plectonema boryanum 465, P. nostocorum 636, P. nostocorum 638, P. edaphicum 262, Plectonema sp. 456, Phormidium uncinatum 528, Anabaena variabilis 458 and Synechococcus cedrorum 750 have been approved. The method of plasmids isolation by 1 M NaCl salting out was used for plasmid screening.(More)
Changes in the electrophysical and morphometrical parameters of Bacillus thuringiensis cells were studied during their growth and differentiation using the electrophysical procedure with the frequency of an alternating electric field varying within a wide range. The appearing variations were interpreted on the basis of the data about changes in the(More)