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Plotka, Magdalena, 2024, "Comparison of the Antibacterial Activity of Selected Deep Eutectic Solvents (DESs) and Deep Eutectic Solvents Comprising Organic Acids (OA-DESs) Toward Gram-Positive and Gram-Negative Species", https://doi.org/10.18150/WGD28R, RepOD, V1
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Deep eutectic solvents (DESs) have been intensively investigated in recent years for their antibacterial properties, with DESs that comprise organic acids (OA-DESs) showing promising antibacterial action. However a majority of the reports focused only on a limited number strains and techniques, which is not enough to determine the antibacterial potential of a substance. To bridge this gap, the antibacterial activity of classical DESs and OA-DESs is assessed on twelve Gram-negative and Gram-positive bacteria strains, with some of them exhibiting specific resistance toward antibiotics. The investigated formulations of OA-DESs comprise glycolic, malic, malonic, and oxalic acids as representatives of this group. Using a range of microbiological assays as well as physicochemical characterization methods, a major difference of the effectiveness between the two groups is demonstrated, with OA-DESs exhibiting, as expected, greater antibacterial effectiveness than classical DESs. Most interestingly, slight differences in the minimum inhibitory and bactericidal concentration values as well as time-kill kinetics profiles are observed between Gram-positive and Gram-negative strains. Transmission electron microscopy analysis reveals the effect of the treatment of the bacteria with the representatives of both groups of DESs, which allows us to better understand the possible mechanism-of-action of these novel materials.
deep eutectic solvent, antibacterial action, minimum inhibitory concentration, minimum bactericidal concentration, time-kill kinetics, mechanism of action
T. Swebocki, A. M. Kocot, A. Barras, H. Arellano, L. Bonnaud, K. Haddadi, A.-L. Fameau, S. Szunerits, M. Plotka, R. Boukherroub, Comparison of the Antibacterial Activity of Selected Deep Eutectic Solvents (DESs) and Deep Eutectic Solvents Comprising Organic Acids (OA-DESs) Toward Gram-Positive and Gram-Negative Species. Adv. Healthcare Mater. 2024, 2303475. https://doi.org/10.1002/adhm.202303475 https://onlinelibrary.wiley.com/doi/full/10.1002/adhm.202303475 doi: 10.1002/adhm.202303475
CC BY - Creative Commons Attribution 4.0
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