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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - JOUR AU - Balázs, Viktória Lilla AU - Filep, Rita AU - Répás, Fanni AU - Kerekes, Erika Beáta AU - Szabó, Péter AU - Kocsis, Béla AU - Böszörményi, Andrea AU - Krisch, Judit AU - Horváth, Györgyi TI - Immortelle (Helichrysum italicum (Roth) G. Don) Essential Oil Showed Antibacterial and Biofilm Inhibitory Activity against Respiratory Tract Pathogens JF - MOLECULES J2 - MOLECULES VL - 27 PY - 2022 IS - 17 PG - 13 SN - 1420-3049 DO - 10.3390/molecules27175518 UR - https://m2.mtmt.hu/api/publication/33080544 ID - 33080544 AB - The biofilm formation of bacteria in different parts of the human body can influence the success of antibiotic therapy. Essential oils (EOs) and their components are becoming increasingly popular in point of view of medicinal applications, because of their antibacterial efficacy. The immortelle EO has been used traditionally as an expectorant; however, there are no studies summarizing its antibacterial effect against respiratory tract bacteria. Our aim was to investigate the antibacterial and biofilm inhibitory activity of immortelle (Helichrysum italicum) EO against respiratory tract pathogens such as Haemophilus influenzae, H. parainfluenzae, Pseudomonas aeruginosa and Streptococcus pneumoniae. In order to prove the antibacterial effect of the immortelle EO, broth microdilution and biofilm inhibition tests, and membrane damage assay were investigated. Scanning electron microscopy was used to identify the structural modifications in bacterial cells. Our results showed that immortelle EO has antibacterial and anti-biofilm effects against respiratory tract bacteria used in this study. H. parainfluenzae was the most sensitive to each treatment, however, P. aeruginosa was the most resistant bacteria. In conclusion, the studied EO may have a role in the treatment of respiratory tract infections due to their antibacterial and anti-biofilm activity. LA - English DB - MTMT ER - TY - JOUR AU - Farkas, Ágnes AU - Balázs, Viktória Lilla AU - Kőszegi, Tamás AU - Jakabfi-Csepregi, Rita AU - Kerekes, Erika Beáta AU - Horváth, Györgyi AU - Szabó, Péter AU - Gaál, Krisztián AU - Kocsis, Marianna TI - Antibacterial and Biofilm Degradation Effects of Hungarian Honeys Linked With Botanical Origin, Antioxidant Capacity and Mineral Content JF - FRONTIERS IN NUTRITION J2 - FRONT NUTR VL - 9 PY - 2022 PG - 13 SN - 2296-861X DO - 10.3389/fnut.2022.953470 UR - https://m2.mtmt.hu/api/publication/32940530 ID - 32940530 N1 - * Megosztott szerzőség AB - The aim of the study was to assess the impact of four unifloral honeys on the food-borne pathogens Pseudomonas aeruginosa and Staphylococcus aureus, by analyzing the honeys' antibacterial and biofilm degradation effects, as well as their antioxidant activity and element content. Linden and milkweed honeys represented light colored honeys, while goldenrod and chestnut honeys the darker ones. The botanical origin of the honeys and the relative frequency of their pollen types were established with melissopalynological analysis. The antioxidant capacities were calculated by two single electron transfer based methods (TRC - Total Reducing Capacity and TEAC - Trolox Equivalent Antioxidant Capacity) and a hydrogen atom transfer based assay (ORAC - Oxygen Radical Absorbance). The amount of four main macro- and two microelements was quantified. The antibacterial activity was determined by minimum inhibitory concentration (MIC) and membrane degradation assays. Furthermore, the biofilm degradation power of the samples was studied as well. The light colored linden honey with the lowest TRC and TEAC, but with the highest ORAC antioxidant activity and high element content showed the best antibacterial and biofilm degradation effects. Meanwhile, the dark colored chestnut honey with significantly higher single electron transfer based antioxidant capacities, with high element content, but lower ORAC showed significantly higher MIC and lower membrane degradation activity than linden honey. In case of biofilm degradation, both honey types gave similarly high inhibitory effect. Goldenrod honey was similarly effective regarding its MIC properties like chestnut honey, but had significantly lower antioxidant potential and ability to disrupt bacterial membranes and biofilms. Milkweed honey was the honey type with the lowest bioactivity and element content. The honeys, unequivocally characterized by their antioxidant characters and element content, displayed different antibacterial and biofilm degradation effects. In addition, some honey traits were found to be good predictors of the antimicrobial potential of honeys: ORAC assay showed correlation with the MIC values of both bacteria, and strict correlation was found between the mineral content and the antibiofilm activity of the studied honeys. Our studies indicate that unifloral honeys, such as linden and chestnut honeys, are plant-derived products with great potential as antimicrobial agents in food preservation, exhibiting remarkable antibacterial activity against food-borne pathogens. LA - English DB - MTMT ER - TY - JOUR AU - Gurdán, Zsuzsanna AU - Turzó, Kinga Mónika AU - Lőrinc, Laura AU - Szabó, Péter AU - Karádi, Kristóf Kálmán AU - Lukács, András Szilárd AU - Told, Roland AU - Kardos, Kinga AU - Maróti, Péter TI - Mechanical Characterization and Structural Analysis of Latex-Containing and Latex-Free Intermaxillary Orthodontic Elastics JF - POLYMERS J2 - POLYMERS-BASEL VL - 14 PY - 2022 IS - 21 PG - 17 SN - 2073-4360 DO - 10.3390/polym14214488 UR - https://m2.mtmt.hu/api/publication/33194417 ID - 33194417 AB - Class II malocclusion is one of the most common dental anomalies and the use of intermaxillary elastomers is the standard method in its treatment. However, orthodontic elastics cannot exert continuous force over a period of time due to force degradation. Our goal was to mechanically characterize the different types of elastomers during static and cyclic loads, based on uniform methodology and examine the morphological changes after loading. Ten types of latex-containing and four latex-free intermaxillary elastics were examined from six different manufacturers. To determine the mechanical characteristics of the elastomers, tensile tests, cyclical tensile fatigue tests and 24 h relaxation tests were performed, and the elastics were also subjected to scanning electron microscopy (SEM) and Raman spectroscopy. Regardless of the manufacturer, the latex-containing elastomers did not show significant differences in the percentage of elongation at break during the tensile test. Only one type of latex-containing elastomer did not tear during the 24 h cyclical fatigue test. Fatigue was confirmed by electron microscopy images, and the pulling force reduced significantly. During the force relaxation test, only one latex-free ligature was torn; the force degradation was between 7.8% and 20.3% for latex ligatures and between 29.6% and 40.1% for latex-free elastomers. The results showed that dynamic loading was more damaging to ligatures than static loading, latex-containing elastomers were more resistant than latex-free elastics, and which observation could have clinical consequences or a potential effect on patient outcome. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, László AU - Nagymihaly, Zoltan AU - Szabó, Péter AU - Kollár, László AU - Kunsági-Máté, Sándor TI - Anodic Polymerization of Phenylphenols in Methyl Isobutyl Ketone and Mesityl Oxide: Incorporation of a Cavitand into the Layers Formed for Sensing Phenols in Organic Media JF - MOLECULES J2 - MOLECULES VL - 27 PY - 2022 IS - 17 PG - 16 SN - 1420-3049 DO - 10.3390/molecules27175366 UR - https://m2.mtmt.hu/api/publication/33080537 ID - 33080537 AB - The electropolymerization of three phenylphenol isomers was studied in methyl isobutyl ketone and mesityl oxide, and the remarkable differences highlighted the importance of the carbon–carbon double bond in mesityl oxide. In the case of each substrate, a brownish deposit formed during the electrooxidation. The obvious difference between the polymers formed from the two solvents was recognized via voltammetric signal enhancement of 4-methoxyphenol and 4-chlorophenol, and it was only observed in the case of mesityl oxide. The experiments highlighted that incorporation of a cavitand with biphenyl groups on the upper rim of the polymers of phenylphenols improved the results to a small extent. The cavitand was, itself, electroactive without any fouling effect. As 2-phenylphenol is by far the cheapest of the three isomers, a cavitand was incorporated into its polymer, which was exploited to solve analytical problems while mesityl oxide was used as solvent. Useful quantifications were achieved in organic solvents; however, it failed under aqueous conditions due to the high hydrophobicity of the deposit. Application of differential pulse voltammetry for 4-methoxyphenol and 4-chlorophenol gave detection limits of 9.28 and 50.8 μM in acetonitrile, respectively. This procedure resulted in the immobilization of cavitand derivatives onto the electrode’s surface, and the layer formed offered selective sensing of phenols by electrochemical methods. LA - English DB - MTMT ER - TY - JOUR AU - Kolarovszki, Béla AU - Sándor, Alíz AU - Szabó, Péter AU - Heszlerné Kopniczky, Judit AU - Frank, Dorottya AU - Nagy, Ákos Károly AU - Turzó, Kinga Mónika TI - Energy drinks alter the surface morphology and roughness of composites, fissure sealants and titanium: An in vitro study JF - HELIYON J2 - HELIYON VL - 8 PY - 2022 IS - 9 PG - 9 SN - 2405-8440 DO - 10.1016/j.heliyon.2022.e10764 UR - https://m2.mtmt.hu/api/publication/33117585 ID - 33117585 AB - Objectives The influence of energy drinks on dental materials are relatively under addressed. Our aim was to investigate the effect of energy drinks on dental materials used intraorally in young individuals. Commonly used preventive, restorative, and orthodontic materials were tested in vitro. Methods The effect of two commercially available energy drinks (HELL, BURN) was investigated on different dental materials: machined, anodized Titanium (grade 5: Ti6Al4V) and composites (Grandio Seal, VOCO; Filtek Z250, 3M ESPE; Estelite SQ, TOKUYAMA). The roughness (Ra) and morphological changes were examined by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Results AFM and SEM revealed significant differences in the Ra and morphology of the samples. AFM results for the machined and anodized titanium samples showed that the two energy drinks modified the surface roughness differently; BURN changed the roughness of machined samples significantly, while anodized discs were not altered significantly by the two energy drinks. In case of composite samples there was no significant difference for the Estelite SQ, relative low differences for the Filtek Z250 and significant changes in the morphology and surface roughness of Grandio Seal. Significance On all tested materials, changes in the surface roughness and morphology were more or less detected, proving energy drinks do in fact have a harmful effect. It can be concluded that material erosion depends on the material composition and particle arrangement. Where the surface is characterized by a regular, uniform particle arrangement, energy drinks are less able to influence the roughness, while for samples where the surface is rich in aggregates, the material erodes the surface much more easily. LA - English DB - MTMT ER - TY - JOUR AU - Mühl, Attila AU - Szabó, Péter AU - Homokiné Krafcsik, Olga AU - Aigner, Zoltán AU - Heszlerné Kopniczky, Judit AU - Nagy, Ákos Károly AU - Marada, Gyula AU - Turzó, Kinga Mónika TI - Comparison of surface aspects of turned and anodized titanium dental implant, or abutment material for an optimal soft tissue integration JF - HELIYON J2 - HELIYON VL - 8 PY - 2022 IS - 8 PG - 8 SN - 2405-8440 DO - 10.1016/j.heliyon.2022.e10263 UR - https://m2.mtmt.hu/api/publication/33053775 ID - 33053775 AB - Soft tissue integration of dental implants lags behind natural biological integration of teeth mainly because of non-optimal surface features. Peri-implant infections resulting in loss of supporting bone jeopardize the success of implants. Our aim was to compare an anodized surface design with a turned one for a more optimal surface.Morphological and chemical structures of turned and anodized Ti surfaces (grade 5: Ti6Al4V) discs were examined by scanning electron microscopy (SEM-EDS), energy dispersive X-ray spectroscopy (EDS), and atomic force microscopy (AFM). The hydrophilic or hydrophobic features of the surfaces were determined by dynamic contact angle measurement.SEM and AFM revealed significant differences in the morphology and roughness (Ra) of the samples. Anodized discs presented a granular structure, while turned ones had circular grooves. The roughness was significantly higher for the anodized samples compared to the turned ones. XPS and EDS confirmed typical elements for both Ti6Al4V samples. Due to anodization, the amount of Ti (IV) had increased and Ti (III) had decreased in the thicker oxide layer. Anodized samples resulted in a more hydrophilic surface than the turned ones.The results suggest that the tested anodized samples present optimal surface characteristics to be used as abutment material for an optimal soft tissue integration. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Márton AU - Kocsis, László AU - Tóth, Emőke AU - Szabó, Péter AU - Németh, Tamás AU - Sebe, Krisztina TI - Chondrichthyan (Holocephali, Squalomorphii and Batomorphii) remains from the Badenian of southern Hungary (Tekeres, Mecsek Mountains): the first deepwater cartilaginous fishes from the Middle Miocene of the Central Paratethys JF - PAPERS IN PALAEONTOLOGY J2 - PAP PALAEONTOL VL - 8 PY - 2022 IS - 6 PG - 50 SN - 2056-2799 DO - 10.1002/spp2.1471 UR - https://m2.mtmt.hu/api/publication/33535507 ID - 33535507 LA - English DB - MTMT ER - TY - CONF AU - Szabó, Márton AU - Kocsis, László AU - Tóth, Emőke AU - Szabó, Péter AU - Németh, Tamás AU - Sebe, Krisztina ED - Bosnakoff, Mariann ED - Virág, Attila ED - Szives, Ottilia ED - Főzy, István TI - Különlegesség a középsőparatethysből: hazánk első badeni korú, mélyvízi porcoshal faunája (Tekeres, Mecsek Hg.) T2 - 25. Magyar Őslénytani Vándorgyűlés, Tótvázsony, 2022 Program, előadáskivonatok, kirándulásvezető PB - Magyarhoni Földtani Társulat CY - Budapest SN - 9789638221872 PY - 2022 SP - 33 UR - https://m2.mtmt.hu/api/publication/32892913 ID - 32892913 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Szabó, Péter AU - Kovács, János AU - Kocsis, L AU - Vennemann, T AU - Domingo, L AU - Újvári, Gábor AU - Halmai, Ákos AU - Pirkhoffer, Ervin AU - Codrea, V TI - Pliocene - Early Pleistocene continental climate and vegetation in Europe based on stable isotope compositions of mammal tooth enamel JF - QUATERNARY SCIENCE REVIEWS J2 - QUATERN SCI REV VL - 288 PY - 2022 PG - 19 SN - 0277-3791 DO - 10.1016/j.quascirev.2022.107572 UR - https://m2.mtmt.hu/api/publication/32861079 ID - 32861079 AB - There is an increasing need for paleoclimate records from continental settings to better understand the climatic changes during critical periods such as the Pliocene and Early Pleistocene. Present data indicates a transition from a warmer than present-day climate to a substantially different cooler climate. This study reviews the oxygen and carbon isotope compositions of mammalian tooth enamel for the Pliocene and Early Pleistocene of South and Central Europe to reconstruct the spatial distribution and temporal changes of the vegetation and oxygen isotope composition of precipitation (d18Oppt). In addition to a literature review, this study adds new stable isotope measurements for this period. All d13C values indicate C3 ecosystems and reflect major changes in the water use efficiency and/or in the prevailing humidity. The reconstructed major floral types range from woodland to woodland ‒ mesic grassland in all of the investigated regions. The carbon isotope compositions of fossil mammal teeth demonstrate that the spatial distribution of vegetation was broadly similar to those of the present-day for the Early/Late Pliocene e Early Pleistocene, with the most “closed” vegetation in Central and Northern Italy, while open mesic grassland vegetation covers can be reconstructed for the Iberian Peninsula, Massif Central region (Central France) and the Carpathian Basin. The calculated d18Oppt values give a negative temporal shift of about 1e1.5‰ from the Early Pliocene to Late Pliocene e Early Pleistocene in three regions (Iberian Peninsula, Central Italy, Carpathian Basin), potentially representing a 1.5e3.0 C decrease in mean annual temperatures (MAT) over time. In the Massif Central region and the Carpathian Basin, the d18Oppt values are almost the same for the Late Pliocene and Early Pleistocene, while in Northern Italy the values decreased over that period. The d18Oppt values are in the range of present-day d18Oppt values over the Early Pliocene and somewhat lower than present-day values for the Late Pliocene - Early Pleistocene in most of the regions. Because most other proxies indicate warmer than present-day climate for the Early Pliocene and similar to present-day climate for the Early Pleistocene, the d18Oppt values are generally lower than expected, which can be partially explained by local effects. LA - English DB - MTMT ER - TY - JOUR AU - Told, Roland AU - Ujfalusi, Zoltán AU - Péntek, Attila AU - Kerényi, Mónika AU - Bánfai, Krisztina AU - Vizi, András AU - Szabó, Péter AU - Melegh, Szilvia AU - Bovari-Biri, Judit AU - Pongracz, Judit E. AU - Maróti, Péter TI - A state-of-the-art guide to the sterilization of thermoplastic polymers and resin materials used in the additive manufacturing of medical devices JF - MATERIALS AND DESIGN J2 - MATER DESIGN VL - 224 PY - 2022 PG - 1 SN - 0264-1275 DO - 10.1016/j.matdes.2022.111395 UR - https://m2.mtmt.hu/api/publication/33364773 ID - 33364773 N1 - Corrigendum to: Materials & Design, Volume 223 (2022) 111119 LA - English DB - MTMT ER -