TY - JOUR AU - Kiss, László AU - Szabó, Péter AU - Kunsági-Máté, Sándor TI - Comparison between Electrooxidation of 1-Naphthol and 2-Naphthol in Different Non-Aqueous Solvents and Suppression of Layer Growth of Polymers JF - SURFACES J2 - SURFACES-BASEL VL - 7 PY - 2024 IS - 1 SP - 164 EP - 180 PG - 17 SN - 2571-9637 DO - 10.3390/surfaces7010011 UR - https://m2.mtmt.hu/api/publication/34777126 ID - 34777126 N1 - Funding Agency and Grant Number: Hungarian National Research Development and Innovation Office (NKFI) Funding text: No Statement Available AB - The two naphthol isomers were investigated in different organic solvents by taking cyclic voltammograms, and fouling took place on a platinum electrode surface, except for dimethyl sulfoxide and dimethyl formamide. Studies in allyl alcohol rarely used in electrochemical investigations pointed to the importance of the carbon-carbon double bond as electrode deactivation was remarkably faster compared with its saturated analog solvent. Similarly, the use of the other unsaturated solvent mesityl oxide in the electropolymerization of naphthols resulted in different findings compared with methyl isobutyl ketone. As dimethyl formamide was the best choice concerning the solubility of products, it was successfully tested in electrode renewal after deactivation in an aqueous solution. The increase in dimethyl formamide content led to more and more improved reproducibility of the currents of the outlined aromatic compounds. Naphthol isomers were assessed in the suppression of layer growth originating from the electrooxidation of another monomer phloroglucinol. Its simultaneous electrooxidation with naphthol monomers had a dramatic effect on layer morphology and it was found that instead of a coherent organic layer originating from the homopolymerization of phloroglucinol, the copolymerization with naphthols led to the development of more porous and rougher deposits. The suppressed electropolymerization thus increased sensitivity towards a chosen redox active compound, 4-methoxyphenol. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, Gabriella Ilona AU - Szabó, Péter AU - Túri, Marianna AU - Futó, István AU - Kovács, János AU - Palcsu, László TI - Comparison of different preparation methods for oxygen isotope determination of phosphate in mammal tooth enamel JF - CENTRAL EUROPEAN GEOLOGY J2 - CENT EUR GEOL VL - 65 PY - 2023 IS - 2 SP - 144 EP - 157 PG - 14 SN - 1788-2281 DO - 10.1556/24.2023.00132 UR - https://m2.mtmt.hu/api/publication/34180795 ID - 34180795 N1 - Isotope Climatology and Environmental Research Centre, HUN-REN Institute for Nuclear Research, Debrecen, Hungary Doctoral School of Physics, University of Debrecen, Debrecen, Hungary Institute of Geography and Earth Sciences, University of Pécs, Pécs, Hungary Export Date: 1 January 2024 Correspondence Address: Kiss, G.I.; Isotope Climatology and Environmental Research Centre, Bem tér 18/C, Hungary; email: kiss.gabriella@atomki.hu AB - We tested several sample pre-treatment protocols for the study of oxygen isotope ratios in the phosphate phase of mammalian enamel of ten different fossil samples. We investigated the effect of different pre-treatment methods and the duration of the hydrogen fluoride treatment on enamel samples from skeletal phosphate with known δ 18 O values. The samples had been measured previously, so we could compare the ratios measured in our laboratory with the previous values to choose the best chemical preparation procedure. Four pre-soaking methods and two different time intervals of 2 mol dm −3 hydrogen fluoride treatment were compared during our experiments. In our experimental conditions, the distilled water wash and the 6 h of soaking in hydrogen fluoride gave the closest results to the expected δ -values. The steps of the tested preparation processes were repeated at least three times on each sample, so the reproducibility of the process could be also investigated. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Márton AU - Kocsis, László AU - Szabó, Péter AU - Békési, Zoltán AU - Gulyás, Péter TI - New records and specimens to the Badenian fish fauna of Nyirád (Hungary), including the first report of Galeocerdo cuvier from the Middle Miocene of Europe JF - FRAGMENTA PALAEONTOLOGICA HUNGARICA J2 - FRAGM PALAEONTOL HUNG VL - 38 PY - 2023 SP - 53 EP - 74 PG - 22 SN - 1586-930X DO - 10.17111/FragmPalHung.2023.38.53 UR - https://m2.mtmt.hu/api/publication/34134294 ID - 34134294 AB - The Nyirád I. outcrop is extremely rich in fossils of marine vertebrates, including chondrichthyans, osteichthyans and marine mammals. Rarely, remains of terrestrial vertebrates are also found. The present paper adds important data to the vertebrate faunal list of the two Badenian formations of the outcrop, namely the Pusztamiske and Leitha Limestone Formations. Altogether, remains of 38 chondrichthyan and 13 osteichthyan taxa, cetaceans and two terrestrial tetrapods have been documented from the outcrop so far. The most important new result is the occurrence of teeth most similar to those of the tiger shark Galeocerdo cuvier. Th is data provides the first evidence from the Badenian of the Central Paratethys for the co-existence of two species of the genus Galeocerdo in the same habitat. With 141 figures and 1 table. LA - English DB - MTMT ER - TY - CONF AU - Farkas, Beáta AU - Szabó, Péter AU - Kovács, János AU - Fábián, Szabolcs Ákos ED - Fernández-Fernández, José M. ED - Bonsoms, Josep ED - Garcia-Oteyza, Julia ED - Oliva, Marc TI - Frost weathering intensity in relict sand wedges from Hungary inferred from scanning electron microscopy T2 - 6th European Conference on Permafrost: Book of Abstracts PY - 2023 SP - 434 PG - 1 UR - https://m2.mtmt.hu/api/publication/34034552 ID - 34034552 LA - English DB - MTMT ER - TY - JOUR AU - Bakó, Csongor AU - Balázs, Viktória Lilla AU - Kerekes, Erika Beáta AU - Kocsis, Béla AU - Nagy, Dávid AU - Szabó, Péter AU - Micalizzi, Giuseppe AU - Mondello, Luigi AU - Krisch, Judit AU - Pethő, Dóra AU - Horváth, Györgyi TI - Flowering phenophases influence the antibacterial and anti-biofilm effects of Thymus vulgaris L. essential oil JF - BMC COMPLEMENTARY MEDICINE AND THERAPIES J2 - BMC COMPL MED THERAP VL - 23 PY - 2023 IS - 1 PG - 14 SN - 2662-7671 DO - 10.1186/s12906-023-03966-1 UR - https://m2.mtmt.hu/api/publication/33870275 ID - 33870275 N1 - * Megosztott szerzőség LA - English DB - MTMT ER - TY - JOUR AU - Piasecki, Bartłomiej AU - Balázs, Viktória Lilla AU - Kieltyka-Dadasiewicz, Anna AU - Szabó, Péter AU - Kocsis, Béla AU - Horváth, Györgyi AU - Ludwiczuk, Agnieszka TI - Microbiological Studies on the Influence of Essential Oils from Several Origanum Species on Respiratory Pathogens. JF - MOLECULES J2 - MOLECULES VL - 28 PY - 2023 IS - 7 PG - 15 SN - 1420-3049 DO - 10.3390/molecules28073044 UR - https://m2.mtmt.hu/api/publication/33754867 ID - 33754867 N1 - * Megosztott szerzőség AB - Essential oils (EOs) with established and well-known activities against human pathogens might become new therapeutics in multidrug-resistant bacterial infections, including respiratory tract infections. The aim of this study was to evaluate the antimicrobial activity of EOs obtained from several samples of Origanum vulgare, O. syriacum, and O. majorana cultivated in Poland. EOs were analyzed by GC-MS and tested against four bacterial strains: Staphylococcus aureus (MRSA), Haemophilus influenzae, Haemophilus parainfluenzae, and Pseudomonas aeruginosa. Chemical analyses showed that the Eos were characterized by a high diversity in composition. Based on the chemical data, four chemotypes of Origanum EOs were confirmed. These were carvacrol, terpineol/sabinene hydrate, caryophyllene oxide, and thymol chemotypes. Thin-layer chromatography-bioautography confirmed the presence of biologically active antibacterial components in all tested EOs. The highest number of active spots were found among EOs with cis-sabinene hydrate as the major compound. On the other hand, the largest spots of inhibition were characteristic to EOs of the carvacrol chemotype. Minimal inhibitory concentrations (MICs) were evaluated for the most active EOs: O. vulgare 'Hirtum', O. vulgare 'Margarita', O. vulgare 'Hot & Spicy', O. majorana, and O. syriacum (I) and (II); it was shown that both Haemophilus strains were the most sensitive with an MIC value of 0.15 mg/mL for all EOs. O. majorana EO was also the most active in the MIC assay and had the highest inhibitory rate in the anti-biofilm assay against all strains. The most characteristic components present in this EO were the trans-sabinene hydrate and terpinen-4-ol. The strain with the least sensitivity was the MRSA with an MIC of 0.6 mg/mL for all EOs except for O. majorana, where the MIC value reached 0.3 mg/mL. Scanning electron microscopy performed on the Haemophilus influenzae and Haemophilus parainfluenzae biofilms showed a visible decrease in the appearance of bacterial clusters under the influence of O. majorana EO. LA - English DB - MTMT ER - TY - JOUR AU - Schneider, György AU - Pásztor, Dorina AU - Szabó, Péter AU - Kőrösi, László AU - Kishan, Nandyala Siva AU - Raju, Penmetsa Appala Rama Krishna AU - Calay, Rajnish Kaur TI - Isolation and Characterisation of Electrogenic Bacteria from Mud Samples JF - MICROORGANISMS J2 - MICROORGANISMS VL - 11 PY - 2023 IS - 3 PG - 15 SN - 2076-2607 DO - 10.3390/microorganisms11030781 UR - https://m2.mtmt.hu/api/publication/33728530 ID - 33728530 AB - To develop efficient microbial fuel cell systems for green energy production using different waste products, establishing characterised bacterial consortia is necessary. In this study, bacteria with electrogenic potentials were isolated from mud samples and examined to determine biofilm-formation capacities and macromolecule degradation. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry identifications have revealed that isolates represented 18 known and 4 unknown genuses. They all had the capacities to reduce the Reactive Black 5 stain in the agar medium, and 48 of them were positive in the wolfram nanorod reduction assay. The isolates formed biofilm to different extents on the surfaces of both adhesive and non-adhesive 96-well polystyrene plates and glass. Scanning electron microscopy images revealed the different adhesion potentials of isolates to the surface of carbon tissue fibres. Eight of them (15%) were able to form massive amounts of biofilm in three days at 23 °C. A total of 70% of the isolates produced proteases, while lipase and amylase production was lower, at 38% and 27% respectively. All of the macromolecule-degrading enzymes were produced by 11 isolates, and two isolates of them had the capacity to form a strong biofilm on the carbon tissue one of the most used anodic materials in MFC systems. This study discusses the potential of the isolates for future MFC development applications. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, László AU - Nagymihaly, Zoltan AU - Szabó, Péter AU - Kollár, László AU - Kunsági-Máté, Sándor TI - Detection of Residual 2-Phenylphenol on Lemon Rind by Electrochemically Deposited Poly(hydroxybenzaldehyde) and Poly(hydroxybenzoic acid) Polymeric Stackings as Electrode Modifiers JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 1 PG - 12 SN - 1996-1944 DO - 10.3390/ma16010357 UR - https://m2.mtmt.hu/api/publication/33550179 ID - 33550179 AB - This study explores the characteristics of electrodeposition of the three hydroxybenzaldehyde isomers and selected hydroxybenzoic acids (4-hydroxybenzoic acid, salicylic acid, 3,5-dihydroxybenzoic acid) from mesityl oxide solvent. Similar to recent advances of this solvent, used by electrochemical studies, the carbon–carbon double bond had significant influence on the formation of polymers from the outlined molecules. In case of most substrates the peak currents increased to a steady-state but electropolymerization of some substrates caused significant deactivation. Scanning electron microscopic and complementary voltammetric studies facilitated that the electrochemically formed polymers are present on the electrode surface in stackings. In viewpoint of analysis of 2-phenylphenol, the modifying deposit formed from 4-hydroxybenzaldehyde was the best with 5 µM detection limit obtained with differential pulse voltammetry. Furthermore, a new procedure was chosen for the involvement of a cavitand derivative into the organic layers with the purpose to improve the layer selectivity (subsequent electrochemical polymerization in an other solution). Further studies showed that in this way the sensitivities of as-modified electrodes were a little worse than without this step, thus indicating that application of this step is disadvantageous. Recovery studies of 2-phenylphenol were carried out on lemon rind without any treatment, and it was compared with the case when the outer yellow layer was removed by rasping. The inner tissues showed very high adsorption affinity towards 2-phenylphenol. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Márton AU - Szabó, Péter AU - Kóbor, Péter AU - Ősi, Attila TI - Alienopterix santonicus sp. n., a metallic cockroach from the Late Cretaceous ajkaite amber (Bakony Mts, western Hungary) documents Alienopteridae within the Mesozoic Laurasia JF - BIOLOGIA (BRATISLAVA) J2 - BIOLOGIA VL - 78 PY - 2023 IS - 6 SP - 1701 EP - 1712 PG - 12 SN - 0006-3088 DO - 10.1007/s11756-022-01265-7 UR - https://m2.mtmt.hu/api/publication/33538471 ID - 33538471 N1 - Export Date: 3 January 2023 Correspondence Address: Szabó, M.; Department of Paleontology and Geology, Ludovika Tér 2, Hungary; email: szaboomaarton@ttk.elte.hu AB - Cockroaches (Blattaria s. str.) were documented from numerous amber localities around the world, representing both extinct and extant families. Alienopteridae is an extinct cockroach family known only from the Cretaceous of Gondwana (Brazil, Botswana, Myanmar amber) and the Cenozoic of North America. Alienopterix santonicus sp. n. from the Late Cretaceous amber of the Ajka Coal Formation (Bakony Mts, western Hungary) extends the rich geographical distribution of the family into Laurasia during the Mesozoic. As a member of the presumably pollinator cohort Alienopteridae, this species could have played an important role in the Ajka Coal ecosystem during the Santonian. The microrectangular structures of the forewing suggest that the new species likely possessed a metallic colouration already known from the group. Combined with the disruptive body pattern this could have served as an advanced camouflage. The microrectangular structures of the forewing were compared to integument microstructures of extant insects with metallic colouration. Various arthropod taxa are already known from ajkaite, and the new discovery further emphasizes the importance of this amber. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, László AU - Kunsági-Máté, Sándor AU - Szabó, Péter TI - Studies of Phenol Electrooxidation Performed on Platinum Electrode in Dimethyl Sulphoxide Medium. Determination of Unreacted Phenol by the Effect of 4-vinylbenzenesulphonate on the Electrooxidation Process JF - ELECTROANALYSIS J2 - ELECTROANAL VL - 35 PY - 2023 IS - 4 PG - 9 SN - 1040-0397 DO - 10.1002/elan.202200268 UR - https://m2.mtmt.hu/api/publication/33204828 ID - 33204828 LA - English DB - MTMT ER -