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 - Waluyo, G AU - Laksono, Fx Anjar Tri AU - Zaenurrohman, J A AU - Mishra, M AU - Piranti, A S AU - Kovács, János TI - Sediment dredging assessment of the Mrica Banjarnegara hydroelectric reservoir based on technical and economic aspects JF - LAKE AND RESERVOIR MANAGEMENT J2 - LAKE RESERV MANAGE PY - 2024 SN - 1040-2381 DO - 10.1080/10402381.2024.2319590 UR - https://m2.mtmt.hu/api/publication/34766498 ID - 34766498 LA - English DB - MTMT ER - TY - JOUR AU - Gammoudi, Nadia AU - Kovács, János AU - Gresina, Fruzsina AU - Varga, György TI - Combined use of HYSPLIT model and MODIS aerosols optical depth to study the spatiotemporal circulation patterns of Saharan dust events over Central Europe JF - AEOLIAN RESEARCH J2 - AEOLIAN RES VL - 67-69 PY - 2024 PG - 23 SN - 1875-9637 DO - 10.1016/j.aeolia.2024.100899 UR - https://m2.mtmt.hu/api/publication/34734182 ID - 34734182 LA - English DB - MTMT ER - TY - JOUR AU - Laksono, Fx Anjar Tri AU - Mishra, Manoranjan AU - Mulyana, Budi AU - Kovács, János TI - Exploring the Mediterranean tsunami research landscape: scientometric insights and future prospects JF - GEOENVIRONMENTAL DISASTERS J2 - GEOENVIRONMENTAL DISASTERS VL - 11 PY - 2024 IS - 1 PG - 25 SN - 2197-8670 DO - 10.1186/s40677-024-00269-6 UR - https://m2.mtmt.hu/api/publication/34576792 ID - 34576792 LA - English DB - MTMT ER - TY - JOUR AU - Bácsi, Attila AU - Ágics, Beatrix AU - Pázmándi, Kitti Linda AU - Kocsis, Béla AU - Sándor, Viktor AU - Bertók, Lóránd AU - Bruckner, Geza AU - Sipka, Sándor TI - Radiation-Detoxified Form of Endotoxin Effectively Activates Th1 Responses and Attenuates Ragweed-Induced Th2-Type Airway Inflammation in Mice JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 25 PY - 2024 IS - 3 PG - 22 SN - 1661-6596 DO - 10.3390/ijms25031581 UR - https://m2.mtmt.hu/api/publication/34574199 ID - 34574199 N1 - * Megosztott szerzőség AB - Urbanization with reduced microbial exposure is associated with an increased burden of asthma and atopic symptoms. Conversely, environmental exposure to endotoxins in childhood can protect against the development of allergies. Our study aimed to investigate whether the renaturation of the indoor environment with aerosolized radiation-detoxified lipopolysaccharide (RD-LPS) has a preventative effect against the development of ragweed-induced Th2-type airway inflammation. To explore this, cages of six-week-old BALB/c mice were treated daily with aerosolized native LPS (N-LPS) or RD-LPS. After a 10-week treatment period, mice were sensitized and challenged with ragweed pollen extract, and inflammatory cell infiltration into the airways was observed. As dendritic cells (DCs) play a crucial role in the polarization of T-cell responses, in our in vitro experiments, the effects of N-LPS and RD-LPS were compared on human monocyte-derived DCs (moDCs). Mice in RD-LPS-rich milieu developed significantly less allergic airway inflammation than mice in N-LPS-rich or common environments. The results of our in vitro experiments demonstrate that RD-LPS-exposed moDCs have a higher Th1-polarizing capacity than moDCs exposed to N-LPS. Consequently, we suppose that the aerosolized, non-toxic RD-LPS applied in early life for the renaturation of urban indoors may be suitable for the prevention of Th2-mediated allergies in childhood. LA - English DB - MTMT ER - TY - JOUR AU - Rédei, Csanád AU - Buratti, Alessandro AU - Catani, Martina AU - Felinger, Attila TI - Exploring the application limits of different hold-up time markers in supercritical fluid chromatography JF - ANALYTICAL AND BIOANALYTICAL CHEMISTRY J2 - ANAL BIOANAL CHEM VL - 416 PY - 2024 IS - 6 SP - 1485 EP - 1492 PG - 8 SN - 1618-2642 DO - 10.1007/s00216-024-05152-9 UR - https://m2.mtmt.hu/api/publication/34541558 ID - 34541558 AB - The study focuses on the application range of nitrous oxide as a hold-up time marker in supercritical fluid chromatography (SFC). This compound has been suggested a decade ago to be used as unretained marker, something that the field of SFC was missing for a long time, since its beneficial properties make it an ideal candidate as hold-up time marker. Determination of the hold-up volume and actual volumetric flow rates have always been problematic in SFC due to the compressibility of carbon dioxide and one part of this is the difficulty of hold-up time measurements. Depending on the mobile phase, different methods have been used to measure the hold-up time with varying results. Nitrous oxide and other molecules have been compared in different conditions, mobile phases and stationary phases. In all cases, nitrous oxide gave the lowest elution times. However, detection was difficult in mobile phases containing 10% or more of organic modifier, because most solvents mask the signal of nitrous oxide. Interestingly, the choice of stationary phase also had a slight effect on detection, while different pressure and temperature settings affected each compound in a different manner. LA - English DB - MTMT ER - TY - JOUR AU - Dembek, Mikołaj AU - Bacskay, Ivett Orsolya AU - Buratti, Alessandro AU - Catani, Martina AU - Felinger, Attila AU - Buszewski, Bogusław AU - Bocian, Szymon TI - Retention mechanism on phosphodiester stationary phases in hydrophilic interaction liquid chromatography and purely aqueous mobile phase part II: Overloading with limited soluble samples JF - JOURNAL OF CHROMATOGRAPHY A J2 - J CHROMATOGR A VL - 1715 PY - 2024 PG - 12 SN - 0021-9673 DO - 10.1016/j.chroma.2023.464596 UR - https://m2.mtmt.hu/api/publication/34453833 ID - 34453833 N1 - * Megosztott szerzőség LA - English DB - MTMT ER - TY - JOUR AU - Słowik, Marcin AU - Dezső, József AU - Salem, Ali AU - Puhl-Rezsek, Marietta AU - Gałka, Mariusz AU - Kovács, János TI - The evolution of meandering rivers in sedimentary basins: Insights from the lower Drava (Hungary/Croatia) JF - EARTH SURFACE PROCESSES AND LANDFORMS J2 - EARTH SURF PROCESS LANDF VL - 49 PY - 2024 IS - 2 SP - 642 EP - 663 PG - 22 SN - 0197-9337 DO - 10.1002/esp.5726 UR - https://m2.mtmt.hu/api/publication/34206012 ID - 34206012 AB - Rivers flowing through sedimentary basins are subjected to a variety of controls. The main goal of our study was to identify the effect of external (e.g. climate changes, tectonics) and internal controls (e.g. sediment transport, deposition, vegetation cover) on the evolution of meandering rivers flowing through sedimentary basins using the example of the lower Drava River (Europe, Hungary/Croatia). Field research was conducted along a 50‐km‐long section of the valley. Sedimentary data from boreholes and corings, 35 km of ground‐penetrating radar surveys and analyses of digital maps were conducted to reconstruct channel planform changes. Traces of four meander belts were identified, and 39 AMS radiocarbon dates were used to distinguish the chronology of the fluvial events. The evolution of the lower Drava River comprised alternating periods of deposition (formation of aggrading meander belt) and avulsions. The channel belts were formed owing to upstream sediment delivery and floodplain storage. Changes in climate humidity and the occurrence of high flows influenced the planform of the meanders within particular channel belts. The oldest channel was active at least ~40 000 cal. BP before being reworked by subsequent meanders active between the Late Pleniglacial (30 000–14 700 cal. BP) and Late Glacial (~11 000 cal. BP) periods. The channel belts shifted to the south in the Holocene, between ~11 000 and 250 cal. BP due to the presence of a thrust fault situated diagonally to the Drava Valley. Results show channel width, channel belt width and the surface area of point bar deposits increased in the succeeding generations of meanders and that the style and sedimentary architecture of the channel belts were dominantly dependent on autogenic controls, that is, sediment delivery, aggradation and erosional events (e.g. formation of chute cut‐offs). LA - English DB - MTMT ER - TY - JOUR AU - Pukleš, Iva AU - Páger, Csilla AU - Sakač, Nikola AU - Šarkanj, Bojan AU - Matasović, Brunislav AU - Samardžić, Mirela AU - Budetić, Mateja AU - Marković, Dean AU - Jozanović, Marija TI - Electrophoretic Determination of L-Carnosine in Health Supplements Using an Integrated Lab-on-a-Chip Platform with Contactless Conductivity Detection JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 19 PG - 18 SN - 1661-6596 DO - 10.3390/ijms241914705 UR - https://m2.mtmt.hu/api/publication/34188002 ID - 34188002 N1 - ISSN:1422-0067 AB - The health supplement industry is one of the fastest growing industries in the world, but there is a lack of suitable analytical methods for the determination of active compounds in health supplements such as peptides. The present work describes an implementation of contactless conductivity detection on microchip technology as a new strategy for the electrophoretic determination of L-carnosine in complex health supplement formulations without pre-concentration and derivatization steps. The best results were obtained in the case of +1.00 kV applied for 20 s for injection and +2.75 kV applied for 260 s for the separation step. Under the selected conditions, a linear detector response of 5 × 10−6 to 5 × 10−5 M was achieved. L-carnosine retention time was 61 s. The excellent reproducibility of both migration time and detector response confirmed the high precision of the method. The applicability of the method was demonstrated by the determination of L-carnosine in three different samples of health supplements. The recoveries ranged from 91 to 105%. Subsequent analysis of the samples by CE-UV-VIS and HPLC-DAD confirmed the accuracy of the obtained results. 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 -