TY - JOUR AU - Kus, J. AU - Dolezych, M. AU - Schneider, W. AU - Hower, J.C. AU - Hofmann, Tamás AU - Visiné Rajczi, Eszter AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Sachsenhofer, R.F. AU - Bechtel, A. AU - Stojanović, K. AU - Životić, D. AU - Kojić, I. AU - Mastalerz, M. AU - Graupner, T. AU - Lukens, W.E. AU - Donaldson, L. TI - High-cellulose content of in-situ Miocene fossil tree stumps and trunks from Lusatia lignite mining district, Federal Republic of Germany JF - INTERNATIONAL JOURNAL OF COAL GEOLOGY J2 - INT J COAL GEOL VL - 286 PY - 2024 PG - 41 SN - 0166-5162 DO - 10.1016/j.coal.2024.104494 UR - https://m2.mtmt.hu/api/publication/34754866 ID - 34754866 AB - Second Miocene Seam Complex (2nd MFK; germ.: 2. Miozäner Flözkomplex) holds many in-situ, not permineralised fossil tree stumps and trunks with high-cellulose contents. The state of preservation of a set of in-situ fossil trees (Taxodioxylon cryptomerioides, Sciadopityoxylon wettsteinii, and Quasisequoioxylon piskowitzense) collected from three open-cast mines (Welzow-Süd, Meuro, and Piskowitz) in Lusatia lignite mining district, Federal Republic of Germany was investigated using a multi-method research schema. Examination of preservation state of thermally immature fossil woods revealed: (1) well-preserved (non-deformed, non-degraded, and non-flattened) textinite, (2) a retained structural integrity represented by multilayered (multi-zoned) cells with primary, secondary cell wall, and middle lamella, (3) microfracturing restricted to secondary walls only, (4) preservation of polyphenolic parenchyma cells (PP cells), (5) excellent preservation of pits in ray tracheids, (6) presence of amorphous silica (opal-A) coating, and (7) crystalline silica (opal-CT) fillings of small-bladed crystals. Thermogravimetric analysis results showed dissimilar gelification status of fossil samples, supporting chlorite holocellulose assay results. The latter indicated anomalously high-cellulose values (15.6–37.6% holocellulose). The micro-FTIR data obtained revealed an excellent preservation of both hemicellulose (bands at 1740 and 1245 cm−1) and cellulose (bands at 1110 and 1040 cm−1). Micro-FTIR spectrometry indicated lack of preferential hydrolytic removal of polysaccharides in examined samples. Biomarker patterns in lignite revealed forested and prevailing reed-mire vegetation. The results indicated lower contribution of Cupressaceae and emergent macrophyta to precursor organic matter of Welzow-Süd in comparison to Piskowitz lignite. Piskowitz lignite formed in permanent mire with stable water table under reducing, mesotrophic conditions. In contrast, more pronounced water level fluctuations (reducing to slightly oxic settings) and/or post-depositional events are postulated for Welzow-Süd samples. Biomarker assemblages obtained from fossil wood show a distinct dominance of diterpenoids and δ13C values (−24.6 ‰ to −20.3 ‰) that clearly confirm gymnosperm sources. Distributions of diteprenoids and sesquiterpenoids, as well as fatty acids indicate the higher amount of saturated diterpenoids (pimarane, abietane) in fossil than in modern wood. This indicates reducing conditions promoting hydrogenation reactions. In addition to low Eh, preservation of cellulose in fossil wood was also favored by acidic conditions, very low degrees of aerobic fungal degradation, and protection of wood by Cupressaceae-derived resins. While δ13C values of fossil wood are generally consistent with stratigraphic trends and chemotaxonomical classification, slightly elevated δ13C values recorded in T. cryptomerioides and S. wettsteinii in Welzow-Süd and Meuro open-cast mines, respectively, compared to published δ13C data of fossil gymnosperm wood are also indicative for good cellulose preservation. Both preservation of in-situ Miocene fossil stumps and trunks and retention of high-cellulose contents are suggested to be related to high-amplitude temporal fluctuations associated with repeated eustatically-controlled wet-dry cycling inducing: (1) weathering of tuff- and rhyolite-dominated acidic volcanics and Lausitz granodiorite, (2) associated erosion of saprolites, and (3) peat-sourced circulation of humic acid- and fulvic acid-rich waters. The latter led to the formation of Middle Miocene kaolinite deposits, as well as to the release of silicic acid and its subsequent precipitation in form of opal-A. The latter influenced preservation of high-cellulose contents in fossil wood. LA - English DB - MTMT ER - TY - JOUR AU - Hasan, K M Faridul AU - Hasan, KM. Noman Al AU - Horváth, Péter György AU - Bolodár-Varga, Bernadett AU - Kóczán, Zsófia AU - Bejó, László AU - Bak, Miklós AU - Alpár, Tibor László TI - Synergizing mechanical properties and vibrant aesthetics: Nanosilver-treated flax woven fabric reinforcement for polymeric composites JF - RESULTS IN CHEMISTRY J2 - RESULT CHEM VL - 6 PY - 2023 PG - 8 SN - 2211-7156 DO - 10.1016/j.rechem.2023.101066 UR - https://m2.mtmt.hu/api/publication/34105475 ID - 34105475 AB - Innovation and research in the field of natural fiber-reinforced composites have garnered significant attention in recent times due to the pursuit of sustainable materials for diverse applications in the automotive, building and construction, marine, defense, and aviation industries. Woven fabric lamination has emerged as a crucial reinforcement technique for fabricating structural composites using thermosetting polymers. Advanced characteristics of nanoparticles renders them instrumental in enhancing the thermomechanical and physical properties of composites. Researches are actively going on to explore alternative approaches to develop AgNPs that are safe, environmentally friendly, and conducive to their integration into composites. In this study, hornbeam leaves (Carpinus betulus), abundant in central European countries like Hungary, were employed as a stabilizing and reducing agent to in situ synthesize AgNPs onto flax woven fabrics at varying concentrations. The resulting nanosilver-coated and uncoated fabrics were then laminated with MUF (melamine urea formaldehyde) resin using five layers of flax, thereby producing nanocomposites. Extensive analyses were conducted on the compositted products, encompassing inductively coupled plasma optical emission spectroscopy (iCP-OES), morphological examinations of both fractured and intact samples, assessment of mechanical properties, evaluation of physical characteristics (including water absorption, moisture content, and thickness swelling), thermal stability using TGA (Thermogravimetric analysis)/DTG (Derivative thermogravimetry) study, FTIR (Fourier transform infrared spectroscopy), and colorimetric data. The nanocomposites treated with AgNPs exhibited vibrant colors and uniform dispersion of nanoparticles across the surface compared to the control samples. These results suggest that AgNPs were successfully incorporated into flax-woven fabrics, facilitating the production of sustainable composite production. LA - English DB - MTMT ER - TY - CHAP AU - Fodor, Fanni AU - Bak, Miklós AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Németh, Róbert ED - Németh, Róbert ED - Christian, Hansmann ED - Rademacher, Peter ED - Bak, Miklós ED - Báder, Mátyás TI - Can acetylation make hornbeam wood last? Results of 6-year-long field stake test T2 - 10TH HARDWOOD CONFERENCE PROCEEDINGS PB - Soproni Egyetemi Kiadó CY - Sopron SN - 9789633344460 T3 - Hardwood conference proceedings, ISSN 2631-004X ; 10. PY - 2022 SP - 194 EP - 202 PG - 9 UR - https://m2.mtmt.hu/api/publication/33145253 ID - 33145253 LA - English DB - MTMT ER - TY - JOUR AU - Fodor, Fanni AU - Bak, Miklós AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Németh, Róbert TI - Biological Durability of Acetylated Hornbeam Wood with Soil Contact in Hungary JF - FORESTS J2 - FORESTS VL - 13 PY - 2022 IS - 7 PG - 15 SN - 1999-4907 DO - 10.3390/f13071003 UR - https://m2.mtmt.hu/api/publication/32914945 ID - 32914945 LA - English DB - MTMT ER - TY - JOUR AU - Farkas, Attila AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Jánoska, Ferenc TI - Accumulation of selected metals and concentration of macroelements in liver and kidney tissues of sympatric golden jackal (Canis aureus) and red fox (Vulpes vulpes) in Somogy County, Hungary JF - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH J2 - ENVIRON SCI POLLUT R VL - 28 PY - 2021 IS - 47 SP - 66724 EP - 66735 PG - 12 SN - 0944-1344 DO - 10.1007/s11356-021-15156-y UR - https://m2.mtmt.hu/api/publication/32102823 ID - 32102823 LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Adrienn AU - Csáki, Péter AU - Szita, Renáta AU - Kalicz, Péter AU - Gribovszki, Zoltán AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Balázs, Pál AU - Winkler, Dániel TI - A Complex Soil Ecological Approach in a Sustainable Urban Environment: Soil Properties and Soil Biological Quality JF - MINERALS J2 - MINERALS-BASEL VL - 11 PY - 2021 IS - 7 PG - 22 SN - 2075-163X DO - 10.3390/min11070704 UR - https://m2.mtmt.hu/api/publication/32084714 ID - 32084714 LA - English DB - MTMT ER - TY - JOUR AU - Winkler, Dániel AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Ádám, Erdő AU - Horváth, Adrienn TI - Long-term ecological effects of the red mud disaster in Hungary: Regeneration of red mud flooded areas in a contaminated industrial region JF - SCIENCE OF THE TOTAL ENVIRONMENT J2 - SCI TOTAL ENVIRON VL - 644 PY - 2018 SP - 1292 EP - 1303 PG - 12 SN - 0048-9697 DO - 10.1016/j.scitotenv.2018.07.059 UR - https://m2.mtmt.hu/api/publication/3395201 ID - 3395201 LA - English DB - MTMT ER - TY - JOUR AU - Hofmann, Eszter AU - Bolodár-Varga, Bernadett AU - Bidló, András AU - Horváth, Adrienn TI - Talaj- és ásványtani vizsgálat Sopron Fő terén JF - TALAJVÉDELEM J2 - TALAJVÉDELEM PY - 2017 IS - Különszám SP - 139 EP - 148 PG - 10 SN - 1216-9560 UR - https://m2.mtmt.hu/api/publication/3320417 ID - 3320417 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Szabó, Piroska Gabriella AU - Helena, Hybská AU - Bolodár-Varga, Bernadett AU - Rétfalvi, Tamás ED - Mihucz, V TI - A mikroelem adagolás ökotoxikológiai hatásainak vizsgálata silókukorica fermentiszapon T2 - 60. Magyar Spektrokémiai Vándorgyűlés és XIII. Környezetvédelmi Analitikai és Technológiai Konferencia PB - Magyar Kémikusok Egyesülete (MKE) CY - Budapest SN - 9789639970779 PY - 2017 SP - 63 EP - 63 PG - 1 UR - https://m2.mtmt.hu/api/publication/3296084 ID - 3296084 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Farkas, Attila AU - Bidló, András AU - Bolodár-Varga, Bernadett AU - Jánoska, Ferenc TI - Accumulation of Metals in Liver Tissues of Sympatric Golden Jackal (Canis aureus) and Red Fox (Vulpes vulpes) in the Southern Part of Romania. JF - BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY J2 - B ENVIRON CONTAM TOX VL - 98 PY - 2017 IS - 4 SP - 513 EP - 520 PG - 8 SN - 0007-4861 DO - 10.1007/s00128-017-2035-4 UR - https://m2.mtmt.hu/api/publication/3200753 ID - 3200753 AB - Several previous study results have already demonstrated that golden jackal and red fox may serve as biological indicators of trace elements and heavy metal concentrations in the various regions they inhabit. The aim of this study was to evaluate accumulation patterns of targeted elements (Al, Ca, Cr, Cu, Fe, Mg, Mn, Ni and Pb) in liver samples of red foxes and golden jackals collected during the same period in the southern part of Romania. The accumulation patterns of trace elements in the livers of sympatric golden jackal and red fox were practically the same. To date, separate studies of the species individually in different habitats have shown that either of the species can be used for ecotoxicological and biomonitoring studies. Moreover, in general gender related studies, no significant differences in the concentrations of the investigated elements were found in either jackals or foxes. Also, average metal concentrations in liver samples do not show significant differences between groups under and above 12 months of age. LA - English DB - MTMT ER -