title: [Intensification of surfactants synthesis by Nocardia vaccinii K-8 on crude glycerol].
abstract: The authors studied the effect of components of crude glycerol (potassium and sodium salts, ethanol, methanol) - the by-products of biodiesel production on formation of surfactants (surface-active substances, SAS) by Nocardia vaccinii K-8, as well as possibility to intensify the SAS synthesis by the strain K-8 on crude glycerol in the presence ofbiosynthesis precursors (glucose, sun-flower oil, organic substances). It has been established that the introduction of potassium (sodium) chloride in concentration 2.5 % and ethanol (methanol) in concentration 0.3 % into the medium with refined glycerol (1 %) was accompanied by the 14-1.7-fold increase of conditional SAS concentration as compared with indices on the medium without adding salts and alcohols. Under cultivation conditions of strain K-8 on the medium with crude glycerol the conditional SAS concentration was 3-fold higher than on the medium with refined substrate. Introduction of glucose (0.05 %), sun-flower oil (0.05 %), fumarate and citrate (0.1 %) during the stationary growth phase of N. vaccinii K-8 into the medium with crude glycerol (2.2%) was accompanied by the increase in the amount of synthesized SAS h by 17-44 % compared with cultivation of bacteria on the medium without precursors.
authors.forename: T P
authors.initials: TP
authors.lastname: Pirog
authors.forename: K A
authors.initials: KA
authors.lastname: Pokora
authors.forename: O Iu
authors.initials: OIu
authors.lastname: Mashchenko
authors.forename: T A
authors.initials: TA
authors.lastname: Shevchuk
mesh_terms: D002951:Citrates; D003470:Culture Media / Q000737:chemistry; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005650:Fumarates; D005947:Glucose / Q000378:metabolism; D005990:Glycerol / Q000378:metabolism*; D000432:Methanol / Q000378:metabolism; D009615:Nocardia / Q000378:metabolism*; D010938:Plant Oils / Q000378:metabolism; D011189:Potassium Chloride; D012965:Sodium Chloride; D000074242:Sunflower Oil; D013501:Surface-Active Agents / Q000378:metabolism*
chemical_list: D002951:Citrates; D003470:Culture Media; D005650:Fumarates; D010938:Plant Oils; D000074242:Sunflower Oil; D013501:Surface-Active Agents; D000431:Ethanol; D012965:Sodium Chloride; D011189:Potassium Chloride; D005947:Glucose; D005990:Glycerol; D000432:Methanol