Biosynthesis Products of Pseudomonas sp. PS-17 Strain Metabolites. 1. Obtaining and Thermal Characteristics

2020;
: pp. 26 - 31
1
Department of PhChFF InPOCC NAS of Ukraine
2
Lviv Polytechnic National University
3
Lviv Polytechnic National University
4
Department of PhChFF InPOCC NAS of Ukraine, L.M. Lytvynenko Institute of Physical Organic Chemistry and Coal Chemistry of the NAS of Ukraine
5
Department of PhChFF InPOCC NAS of Ukraine, L.M. Lytvynenko Institute of Physical Organic Chemistry and Coal Chemistry of the NAS of Ukraine
6
Department of PhChFF InPOCC NAS of Ukraine
7
Lviv Polytechnic National University, Department of Information Technology Security

Biogenic surfactants (rhamnolipid biocomplex, dirhamnolipid and exopolysaccharide) and polyhydroxyalkanoate biopolymer which are the new biosynthesis products of Pseudomonas sp. PS-17 strain have been obtained. The thermal transformation of these products has been studied in the air in the temperature range of 293–1273 K. Thermolysis and IR spectroscopy revealed a formation of rhamnolipid biocomplex between rhamnolipids and exopolysaccharide upon acidification of the culture fluid supernatant to pH = 3. Cellular polymer – polyhydroxyalkanoate – was identified by UV-Vis spectroscopy. According to the thermal analysis, the melting point and initial degradation temperature of polyhydroxyalkanoate were determined. Using the Vicat method, the heat resistance of the polymer was determined.

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