2020
DOI: 10.23939/chcht14.01.026
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Biosynthesis Products of Pseudomonas sp. PS-17 Strain Metabolites. 1. Obtaining and Thermal Characteristics

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. Cellul… Show more

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Cited by 7 publications
(5 citation statements)
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“…Rhamnolipids obtaining was described in [25]. Silver nanoparticles with rhamnolipids were prepared via method described in [26] To obtain humic acids [27], biohumus was treated with 1% potassium hydroxide with stirring (60 min, 50 C).…”
Section: Methodsmentioning
confidence: 99%
“…Rhamnolipids obtaining was described in [25]. Silver nanoparticles with rhamnolipids were prepared via method described in [26] To obtain humic acids [27], biohumus was treated with 1% potassium hydroxide with stirring (60 min, 50 C).…”
Section: Methodsmentioning
confidence: 99%
“…Determination of PHB. To extract PHB from the biomass we used the method presented in [15] which was modified by us. The extraction was performed using chloroform with the PHB:chloroform ratio of 1:100, at the temperature of 308 K, under stirring for 10 h. The weight of dry polymer was determined gravimetrically.…”
Section: Methodsmentioning
confidence: 99%
“…Previously [15] we have synthesized and investigated the cellular biopolymer of the Pseudomonas sp. PS-17 strain -polyhydroxyalkanoate with a medium length C 5 -C 10 chain -(mcl-PHA) [15].…”
Section: Thermal Analyzesmentioning
confidence: 99%
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“…Thiosulphonate-rhamnolipid and thiosulphonaterhamnolipid-glycanic complexes: Complex preparations (liposomes) composed of: chemically pure glucan (Glu)aqueous mycelium extracts of Ganoderma adspersum (Schulzer) Donk (Kovalenko and Wasser 2016); mannan oligosaccharides (Man), obtained from Candida maltosa cells by extraction with 6% CH3COOH (Podgorsky et al 2010); rhamnolipids (RL) -product of the Pseudomonas sp. PS-17 strain isolated from the cell-free culture liquid in the acidic medium and pH 3 (10% HCl) followed by extraction with mixture of chloroform/methanol (2:1, v/v) and vacuum evaporation (Pokynbroda et al 2019, Semeniuk et al 2020; methylthiosulfanilate (MTS)synthetic structural analogue of organic sulfur compounds of the garlic and onions biocides with a wide range of biological activity (Lubenets et al 2013(Lubenets et al , 2019. In this study, liposomal preparations were prepared according to the method mentioned in the previous work (Kovalenko et al 2022).…”
Section: Virus and Plantsmentioning
confidence: 99%