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Antibacterial effects of silver nanoparticles on gram-negative bacteria: influence on the growth and biofilms formation, mechanisms of action.
Silver nanoparticles of 8.3 nm in diameter stabilized by hydrolyzed casein peptides strongly inhibited biofilms formation of Escherichia coli AB1157, Pseudomonas aeruginosa PAO1 and Serratia proteamaculans 94 in concentrations of 4-5 μg/ml, 10μm, and 10-20 μg/ ml, respectively. Expand
Evidence for the mechanism of photocatalytic degradation of the bacterial wall membrane at the TiO2 interface by ATR-FTIR and laser kinetic spectroscopy.
The photocatalytic peroxidation of E. coli cell, lipo-polysaccharide (LPS), phosphatidyl-ethanolcholine (PE), and peptidoglycan (PGN) and the PGN was observed to be the most resistant membrane wall component by ATR-FTIR spectroscopy. Expand
Mechanism and Kinetics of the OH-Radical Intervention during Fenton Oxidation in the Presence of a Significant Amount of Radical Scavenger (Cl-)
Orange II, the 4-(2-hydroxy-1-naphthylazo)benzenesulfonic acid Na-salt, was taken as a model for the oxidation of organic compounds in photoassisted Fenton process in the presence of Cl--anion inExpand
Dynamics of E. coli membrane cell peroxidation during TiO2 photocatalysis studied by ATR-FTIR spectroscopy and AFM microscopy
Abstract Escherichia coli (E. coli) photokilling due to the TiO2 under light irradiation in a batch reactor was studied by using of attenuated total reflection Fourier transform infrared spectroscopyExpand
New Evidence for TiO2 Photocatalysis during Bilayer Lipid Peroxidation
The photocatalytic peroxidation of the bovine brain l-α-phosphatidyl-ethanolamine (PE) vesicle was measured and used as a model for phospholipid peroxidation. Synthetic phosphatidyl-ethanolamine, E.Expand
Photochemical Decoloration of Remazol Brilliant Blue and Uniblue A in the Presence of Fe3+ and H2O2
The primary fast kinetic steps of the decoloration of the nonbiodegradable textile dyes Remazol Brilliant Blue R and its close analogue, Uniblue A, were studied in the presence of the Fe3+/H2O2 underExpand
Photolysis of FeOH2+ and FeCl2+ in Aqueous Solution. Photodissociation Kinetics and Quantum Yields
Photodissociation of FeOH2+ and FeCl2+ complexes has been studied by pulsed laser spectroscopy (λ = 347 nm) techniques. Transient bleaching of FeOH2+ was observed due to the dissociation FeOH+ → Fe2+Expand
Primary electron transfer processes in photosynthetic reaction centers from oxygenic organisms
The results suggest that the sequence of the primary electron transfer reactions is P680-→ ChlD1 → PheD1–→ QA →-QA (PS II) and P700-→-A0A/A0B →–A1 a/A1B (PS I), however, alternate routes of charge separation in PS II, under different excitation conditions, are not ruled out. Expand
Femtosecond primary charge separation in Synechocystis sp. PCC 6803 photosystem I.
The main events in RCs of PS I under experimental conditions include very fast (<100 fs) charge separation with the formation of the P700+A0-A1 state in approximately one half of the RCs, the approximately 5-ps energy transfer from antenna Chl* to P700A0A1 in the remainingRCs, and approximately 25-psformation of the secondary radical pair P700+. Expand
Preparation, testing and characterization of doped TiO2 active in the peroxidation of biomolecules under visible light.
Doped TiO2 samples using different preparative procedures were synthesized using either urea or thiourea leading to N- or S-doped TiO2. Photocatalytic peroxidation and oxidation (mineralization) ofExpand