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

Ihor Semeniuk1, Viktoria Kochubei2, Volodymyr Skorokhoda2, Tetyana Pokynbroda1, Halyna Midyana1, Elena Karpenko1, Viktor Melnyk2
Affiliation: 
1 Department of Physical Chemistry of Fossil Fuels, L.M. Lytvynenko Institute of Physical Organic Chemistry and Coal Chemistry of the NAS of Ukraine 3a, Naukova St., 79060 Lviv, Ukraine 2 Lviv Polytechnic National University, 12, Bandery St., 79013 Lviv, Ukraine vskorohoda@yahoo.com
DOI: 
https://doi.org/10.23939/chcht14.01.026
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Keywords:

Abstract: 
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.
References: 

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