Surface-active substances synthesized by Rhodococcus erythropolis ІMВ Ас-5017 during co-cultivation with inducing bacteria either Bacillus subtilis BT-2 or Escherichia coli ІЕM-1 (SASI) had the higher antimicrobial and antiadhesive activities in comparison with surface-active substances synthesized in the medium without cells of inducing bacteria (SAS). Minimum inhibitory concentrations of SASI ranged from 3 to12 μg/mL and were in 4-32 times lower than the same parameter for SAS. Treatment of abiotic surfaces (ceramic, steel, and glass) with SASI decreased adhesion of bacteria Staphylococcus aureus BMC-1 or yeasts Candida albicans D-6 to the level of 10-32 % in comparison with 32-87 % after treatment of surfaces with SAS. Destruction of bacterial and yeast biofilms treated with SASI was in the range from 40 to 94 %, while it was 32-65 % in the case when SAS was used. Increasing of biological activity of surface-active substances synthesized by R. erythropolis in co-culture with inducing bacteria E. coli or B. subtilis was shown for the first time.
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http://dx.doi.org/10.1016/j.enzmictec.2020.109677 | DOI Listing |
Adv Colloid Interface Sci
January 2025
Department of Biotechnology, School of Applied Sciences and Technology, BLDE (Deemed to be University), Bangaramma Sajjan Campus, Vijayapura 586103, India; Department of Basic Sciences, Faculty of Engineering and Technology, CMR University, Bangalore 562149, India. Electronic address:
Biosurfactants are biodegradable, non-toxic, and environmentally beneficial substances that are produced by microorganisms. Due to their chemical characteristics and stability in various environmental circumstances, biosurfactants are low-molecular-weight, surface-active molecules of great industrial importance. The choice of the producer microbe, kind of substrate, and purification technique determine the chemistry of a biosurfactant and its production cost.
View Article and Find Full Text PDFJ Oleo Sci
January 2025
Faculty of Science and Technology, Tokyo University of Science.
J Sci Food Agric
December 2024
School of Food and Science Engineering, Lingnan Normal University, Zhanjiang, China.
Background: Currently, protein-polyphenol complexes have garnered increasing attention as surface-active substances in high internal phase Pickering emulsions (HIPPEs). However, the effects of the oil type and flavonoid structure on the HIPPE-stabilizing ability of protein-polyphenol complexes remain unclear. Notably, very few studies have investigated the impacts and mechanisms of different oils (olive, flaxseed, and coconut oils) and the effects of the addition of flavonoids (catechin and quercetin) on the interfacial behavior of walnut protein hydrolysates (WPHs) and the co-oxidation of protein-lipid in the resulting emulsion during storage.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States.
Modulating microbial motility and physiology can enhance the production of bacterial macromolecules and small molecules. Herein, a platform of water-soluble and amphiphilic peptidomimetic polyurethanes is reported as a means of regulating bacterial surface behavior and the concomitant production of extracellular polymeric substances (EPS). It is demonstrated that carboxyl (-COOH)-containing polyurethanes exhibited 17-fold and 80-fold enhancements in () swarming and twitching areas, respectively.
View Article and Find Full Text PDFAAPS PharmSciTech
November 2024
Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei körút 98, Debrecen, 4032, Hungary.
Nasal medications hold significant importance and are widely utilized due to their numerous advantageous properties, offering a compelling route for both local and systemic therapeutic effects. Nowadays, the development of nasal particles under 1 micrometer is in the focus of much scientific research. In our experiments, the use of innovative nanotechnology to increase the effectiveness of the active substance was of paramount importance.
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