TY - JOUR AU - Harasztosi, Lajos AU - SZABÓ, István A. AU - Kiss, Rebeka Gyöngyi AU - Battistig, Gábor TI - Differenciális mikrokaloriméter hőmérséklettartományának kiterjesztése alacsony hőmérsékletű felhasználásokhoz. Extending the temperature range of differential microcalorimeters for low temperature applications TS - Extending the temperature range of differential microcalorimeters for low temperature applications JF - ENELKO - SZÁMOKT J2 - ENELKO - SZÁMOKT PY - 2023 SP - 1 EP - 6 PG - 6 SN - 2734-6757 UR - https://m2.mtmt.hu/api/publication/34469970 ID - 34469970 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Harasztosi, Lajos ED - Csüllög, Mihály ED - Mankovits, Tamás TI - Material Characterization by MagneticBarkhausen-Noise Method T2 - Book of Abstracts from 9th International Scientific Conference on Advances in Mechanical Engineering PB - University of Debrecen CY - Debrecen SN - 9783036414454 PY - 2023 SP - 36 UR - https://m2.mtmt.hu/api/publication/34407726 ID - 34407726 LA - English DB - MTMT ER - TY - CHAP AU - Kiss, Rebeka Gyöngyi AU - Harasztosi, Lajos AU - Battistig, Gábor ED - IEEE, Staff TI - Development of Educational Materials for an Electrical Manufacturing Laboratory T2 - 2023 46th International Spring Seminar on Electronics Technology (ISSE) PB - IEEE CY - Timisoara SN - 9798350334845 PY - 2023 SP - 1 EP - 4 PG - 4 DO - 10.1109/ISSE57496.2023.10168356 UR - https://m2.mtmt.hu/api/publication/34267336 ID - 34267336 AB - The paper introduces the newly installed electrical manufacturing prototype production line used for educational purposes in the Electrical Technology course at the University of Debrecen. The paper aims to show the importance of practical education through the developed educational materials for the Electrical Technology course. The paper aims to explore practical education as a method of effectively teaching electronic product design and manufacturing to provide students with an experiential learning experience in a real-world, prototype production line environment. LA - English DB - MTMT ER - TY - JOUR AU - Ilosvai, Mária Ágnes AU - Gerzsenyi, Tímea AU - Sikora, Emőke AU - Harasztosi, Lajos AU - Kristály, Ferenc AU - Viskolcz, Béla AU - Váradi, Csaba AU - Dorogházi, Emma AU - Vanyorek, László TI - Simplified Synthesis of the Amine-Functionalized Magnesium Ferrite Magnetic Nanoparticles and Their Application in DNA Purification Method JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 18 PG - 17 SN - 1661-6596 DO - 10.3390/ijms241814190 UR - https://m2.mtmt.hu/api/publication/34143231 ID - 34143231 AB - For pathogens identification, the PCR test is a widely used method, which requires the isolation of nucleic acids from different samples. This extraction can be based on the principle of magnetic separation. In our work, amine-functionalized magnesium ferrite nanoparticles were synthesized for this application by the coprecipitation of ethanolamine in ethylene glycol from Mg(II) and Fe(II) precursors. The conventional synthesis method involves a reaction time of 12 h (MgFe2O4-H&R MNP); however, in our modified method, the reaction time could be significantly reduced to only 4 min by microwave-assisted synthesis (MgFe2O4-MW MNP). A comparison was made between the amine-functionalized MgFe2O4 samples prepared by two methods in terms of the DNA-binding capacity. The experimental results showed that the two types of amine-functionalized magnesium ferrite magnetic nanoparticles (MNPs) were equally effective in terms of their DNA extraction yield. Moreover, by using a few minutes-long microwave synthesis, we obtained the same quality magnesium ferrite particles as those made through the long and energy-intensive 12-h production method. This advancement has the potential to improve and expedite pathogen identification processes, helping to better prevent the spread of epidemics. LA - English DB - MTMT ER - TY - CHAP AU - Harasztosi, Tamás AU - Bazsó, Tamás AU - Kiss, Rebeka Gyöngyi AU - Csernátony, Zoltán AU - Harasztosi, Petra AU - Daróczi, Lajos AU - Harasztosi, Lajos ED - IEEE, Staff TI - Development and application of a wireless, in body data acquisition system for observation of experimental rabbit’s bone healing T2 - 2023 46th International Spring Seminar on Electronics Technology (ISSE) PB - IEEE CY - Timisoara SN - 9798350334845 PY - 2023 SP - 1 EP - 4 PG - 4 DO - 10.1109/ISSE57496.2023.10168448 UR - https://m2.mtmt.hu/api/publication/34128116 ID - 34128116 LA - English DB - MTMT ER - TY - JOUR AU - Hajdu, Viktória AU - Prekob, Ádám AU - Muránszky, Gábor AU - Kristály, Ferenc AU - Daróczi, Lajos AU - Harasztosi, Lajos AU - Kaleta, Zoltán AU - Viskolcz, Béla AU - Nagy, Miklós AU - Vanyorek, László TI - Amine Functionalization Leads to Enhanced Performance for Nickel- and Cobalt-Ferrite-Supported Palladium Catalysts in Nitrobenzene Hydrogenation JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 17 PG - 14 SN - 1661-6596 DO - 10.3390/ijms241713347 UR - https://m2.mtmt.hu/api/publication/34117847 ID - 34117847 AB - Easy preparation, good yield and easy recovery are the key challenges in the development of industrial catalysts. To meet all these three criteria, we have prepared intelligent, magnetizable NiFe2O4- and CoFe2O4-supported palladium catalysts that can be easily and completely recovered from the reaction medium by magnetic separation. The fast and facile preparation was achieved by a solvothermal method followed by sonochemical-assisted decomposition of the palladium nanoparticles onto the surface of the magnetic nanoparticles. The metal–support interaction was enhanced by amine functionalization of the supports using monoethanolamine. The performance and stability of the non-functionalized and amine-functionalized NiFe2O4- and CoFe2O4-supported palladium catalysts were compared in the industrially important nitrobenzene hydrogenation reaction. All catalysts showed high catalytic activity during aniline synthesis; complete nitrobenzene conversion and high aniline yield (above 97 n/n%) and selectivity (above 98 n/n%) were achieved. However, during reuse tests, the activity of the non-functionalized catalysts decreased, as the palladium was leached from the surface of the support. On the other hand, in the case of their amine-functionalized counterparts, there was no decrease in activity, and a non-significant decrease in palladium content could be measured. Based on these results, it can be concluded that amine functionalization of transition metal ferrites may result in more effective catalysts due to the enhanced metal–carrier interaction between the support and the precious metal. LA - English DB - MTMT ER - TY - JOUR AU - Harasztosi, Lajos AU - Szabó, A István AU - Bíró, Ferenc AU - Kiss, Rebeka Gyöngyi AU - Battistig, Gábor TI - Temperature Calibration of Twin Micro-heater Based Microcalorimeter JF - SENSORS AND TRANSDUCERS J2 - SENSORS AND TRANSDUCERS VL - 260 PY - 2023 IS - 1 SP - 7 EP - 13 PG - 7 SN - 2306-8515 UR - https://m2.mtmt.hu/api/publication/34002186 ID - 34002186 LA - English DB - MTMT ER - TY - CHAP AU - Harasztosi, Lajos AU - Szabó, I.A AU - Bíró, Ferenc AU - Kiss, Rebeka Gyöngyi AU - Battistig, Gábor ED - Sergey, Y. Yurish TI - Microcalorimeter Development and Calibration Based on a Twin Micro-heater Platform T2 - Proceedings of the 8 th International Conference on Sensors and Electronic Instrumentation Advances PB - International Frequency Sensor Association (IFSA) CY - Korfu SN - 9788409438549 PY - 2022 SP - 112 EP - 116 PG - 5 UR - https://m2.mtmt.hu/api/publication/33334423 ID - 33334423 LA - English DB - MTMT ER - TY - JOUR AU - Harasztosi, Lajos AU - Kovács, László AU - Posgay, György AU - Molnár, Péter AU - Szabó, István TI - Mágneses Barkhausen-zaj mérésen alapuló mérőrendszerek fejlesztése roncsolásmentes anyagvizsgálati célokra JF - ANYAGVIZSGÁLÓK LAPJA J2 - ANYAGVIZSGÁLÓK LAPJA PY - 2019 SP - 46 EP - 49 PG - 4 SN - 1215-8410 UR - https://m2.mtmt.hu/api/publication/30867017 ID - 30867017 AB - A mágneses gerjesztés hatására létrejövő Barkhausen-zaj analízisével az anyagok mikroszerkezetére, belső feszültségállapotára egyaránt következtethetünk. A zajcsomagok jellegzetessége ugyanakkor függ a gerjesztő tér paramétereitől és a minta mágneses állapotától is. Az általunk kifejlesztett mérőeszközök együttes használatával elvégezhetjük az elemi Barkhausen-lavinák statisztikus elemzését és megvizsgálhatjuk a technikai anyag külső mágneses térre adott válaszát egyaránt. A vasúti sínen végzett vizsgálatok alapján egy olyan méréstechnikai megoldást fejlesztettünk ki, amely a remanens mágnesség hatását korrigálva lehetővé teszi a feszültségállapot meghatározását. A korrigált mérési módszer segítségével javítható a semleges hőmérséklet meghatározásának pontossága. LA - Hungarian DB - MTMT ER - TY - CHAP AU - Harasztosi, Lajos AU - Cserháti, Csaba ED - Dr. Sebestyén-Pál, György ED - Dr. Szabó, Loránd ED - Dr. Biró, Károly-Ágoston TI - Zavaró mágneses tér mérése és kompenzálása elektronmikroszkóp képalkotásának optimalizációjához T2 - ENELKO 2019 SzámOkt 2019 PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) CY - Kolozsvár PY - 2019 SP - 45 EP - 50 PG - 6 UR - https://m2.mtmt.hu/api/publication/30848981 ID - 30848981 LA - Hungarian DB - MTMT ER -