Daphnia Magna Acute Immobilization Test: an Opportunity to Test the Ecotoxicity of Alternative Fuels

Hubai, Katalin

doi:10.33927/hjic-2021-10

Cited by 1 publication

(1 citation statement)

References 37 publications

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“…The growing need for environmental protection has led to the development of alternative biofuels. Hubai et al [ 40 ] conducted studies related to their ecotoxicity by conducting an acute immobilization test on Daphnia magna . The toxic effect of CeO 2 and ZnO nanoparticles of the same size that were stabilized by a capping agent polyvinylpyrrolidone (10 k PVP) was investigated by Briffa et al [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

Sol–Gel Synthesis of Silica–Poly (Vinylpyrrolidone) Hybrids with Prooxidant Activity and Antibacterial Properties

Bachvarova-Nedelcheva,

Kostova,

Yordanova

et al. 2024

Molecules

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The present work deals with the sol–gel synthesis of silica–poly (vinylpyrrolidone) hybrid materials. The nanohybrids (Si-PVP) have been prepared using an acidic catalyst at ambient temperature. Tetramethyl ortosilane (TMOS) was used as a silica precursor. Poly (vinylpyrrolidone) (PVP) was introduced into the reaction mixture as a solution in ethanol with a concentration of 20%. The XRD established that the as-prepared material is amorphous. The IR and 29Si MAS NMR spectra proved the formation of a polymerized silica network as well as the hydrogen bonding interactions between the silica matrix and OH hydrogens of the silanol groups. The TEM showed spherical particle formation along with increased agglomeration tendency. The efficacy of SiO2/PVP nanoparticles as a potential antimicrobial agent against a wide range of bacteria was evaluated as bacteriostatic, using agar diffusion and spot tests. Combined effects of hybrid nanomaterial and antibiotics could significantly reduce the bactericidal concentrations of both the antibiotic and the particles, and they could also eliminate the antibiotic resistance of the pathogen. The registered prooxidant activity of the newly synthesized material was confirmative and explicatory for the antibacterial properties of the tested substance and its synergetic combination with antibiotics. The effect of new hybrid material on Crustacea Daphnia magna was also estimated as harmless under concentration of 0.1 mg/mL.

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Section: Introductionmentioning

confidence: 99%