TY - JOUR AU - Varga, Tamás AU - Szejke, Dóra AU - Nemes, Zoltán AU - Jull, Timothy AJ AU - Molnár, Mihály TI - THE POTENTIAL OF BIOGENIC FRACTION ANALYSIS BY RADIOCARBON IN FOOD, DRUG, AND COSMETIC PRODUCTS JF - RADIOCARBON J2 - RADIOCARBON VL - 65 PY - 2023 IS - 5 SP - 1176 EP - 1192 PG - 17 SN - 0033-8222 DO - 10.1017/RDC.2023.98 UR - https://m2.mtmt.hu/api/publication/34265370 ID - 34265370 N1 - Export Date: 23 November 2023 CODEN: RACAA Correspondence Address: Varga, T.; International Radiocarbon Ams Competence and Training (INTERACT) Center, Bem tér 18/c, Hungary; email: varga.tamas@atomki.hu AB - Biobased content analysis is a well-established, analytically independent, standardized method to determine the biobased content of fuels and plastics, based on differences of the specific radiocarbon ( 14 C) activity of fossil and recent biogenic compounds. This biogenic content analysis can be useful for the producers as a quality assurance tool, for the customers as feedback about the truly biobased products and for the control organizations as an independent analytical tool to prove the biological origin. More than 100 commercially available foods, cosmetics, and drug samples have been used for biobased carbon content analysis by accelerator mass spectrometry (AMS) 14 C measurement to demonstrate the potential of this technique. Our results show that this measurement technique is a unique tool for the determination of biocontent in foodstuff and medical products. Most of the tested materials were nearly or completely biobased (≥ 98 pMC), and no completely fossil-based final product was detected. The lowest biogenic compound was measured in a vanilla aroma flavor. In 45 of the 102 samples selected a wide range (2–98%) presented fossil-based carbon content. The method can be applied for monitoring raw materials and final products for biobased content in the industry and consumer protection as well. LA - English DB - MTMT ER - TY - JOUR AU - Varga, Tamás AU - Hajdas, I. AU - Calcagnile, L. AU - Quarta, G. AU - Major, István AU - Jull, Timothy AJ AU - Molnár, Anita AU - Molnár, Mihály TI - Intercomparison exercise on fuel samples for determination of biocontent ratio by 14c accelerator mass spectrometry JF - RADIOCARBON J2 - RADIOCARBON VL - 65 PY - 2023 IS - 2 SP - 539 EP - 548 PG - 10 SN - 0033-8222 DO - 10.1017/RDC.2023.7 UR - https://m2.mtmt.hu/api/publication/33767355 ID - 33767355 N1 - Export Date: 24 April 2023 CODEN: RACAA Correspondence Address: Varga, T.; International Radiocarbon Ams Competence and Training (INTERACT) Center, Hungary; email: varga.tamas@atomki.mta.hu AB - The method of determining the biobased carbon content in liquid fuel samples is standardized, but different laboratories use different protocols during sample preparation and perform the measurements using different machines. The accelerator mass spectrometry (AMS) laboratories use different combustion, preparation, and graphitization methods for the graphite production for the spectrometric measurements. As a result, the intercomparison between the laboratories is inevitable to prove precision and accuracy and to demonstrate that the results are comparable. In this study, we present the results of an intercomparison campaign involving three 14C accelerator mass spectrometry laboratories. Five samples were used in the measurement campaign, including two biocomponents (fatty acid methyl ester, hydrotreated vegetable oil), one fossil component (fossil diesel), and two blends (mixtures of fossil and biocomponent with 90–10% mixing ratio) in the laboratories of CEDAD (Italy), ETH (Switzerland), and INTERACT (Hungary). The results presented by the laboratories are comparable, and all three laboratories could determine the biobased carbon content of the samples within 1% relative uncertainty, which is acceptable in the scientific, economic, and industrial fields for biocomponent determination. LA - English DB - MTMT ER - TY - JOUR AU - Varga, Tamás AU - Molnár, Mihály AU - Molnár, Anita AU - Jull, Timothy AJ AU - Palcsu, László AU - László, Elemér TI - Radiocarbon dating of microliter sized Hungarian Tokaj wine samples JF - JOURNAL OF FOOD COMPOSITION AND ANALYSIS J2 - J FOOD COMPOS ANAL VL - 118 PY - 2023 PG - 8 SN - 0889-1575 DO - 10.1016/j.jfca.2023.105203 UR - https://m2.mtmt.hu/api/publication/33660298 ID - 33660298 N1 - International Radiocarbon AMS Competence and Training Center (INTERACT), Institute for Nuclear Research (ATOMKI), P.O Box 51, Debrecen, H-4001, Hungary University of Debrecen, Doctoral School of Physics, Egyetem tér 1., Debrecen, 4032, Hungary Isotoptech Ltd, P.O. Box 390, Debrecen, H-4001, Hungary Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States University of Arizona AMS Laboratory, Tucson, AZ 85721, United States Export Date: 24 February 2023 CODEN: JFCAE Correspondence Address: Varga, T.; International Radiocarbon AMS Competence and Training Center (INTERACT), P.O Box 51, Hungary; email: varga.tamas@atomki.hu Correspondence Address: László, E.; International Radiocarbon AMS Competence and Training Center (INTERACT), P.O Box 51, Hungary; email: laszlo.elemer@atomki.hu LA - English DB - MTMT ER - TY - GEN AU - Angyal, Anikó AU - Szoboszlai, Zoltán AU - Major, István AU - Molnár, Mihály AU - Varga, Tamás AU - Török, Zsófia AU - Papp, Enikő Ivett AU - Furu, Enikő Emese AU - Maria, Gini AU - Szikszai, Zita AU - Kertész, Zsófia TI - Debrecen városi aeroszol méreteloszlása CY - előadás PY - 2022 UR - https://m2.mtmt.hu/api/publication/34780434 ID - 34780434 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Angyal, Anikó AU - Szoboszlai, Zoltán AU - Major, István AU - Molnár, Mihály AU - Varga, Tamás AU - Török, Zsófia AU - Papp, Enikő Ivett AU - Furu, Enikő Emese AU - Maria, Gini AU - Szikszai, Zita AU - Kertész, Zsófia ED - Jancsek-Turóczi, Beatrix ED - Hoffer, András TI - Debrecen városi aeroszol méreteloszlása T2 - XV. Magyar Aeroszol Konferencia PB - Pannon Egyetem CY - Veszprém SN - 9789633962473 PY - 2022 SP - 14 EP - 14 PG - 1 UR - https://m2.mtmt.hu/api/publication/34780430 ID - 34780430 LA - Hungarian DB - MTMT ER - TY - GEN AU - Baráth, Balázs Áron AU - Varga, Tamás AU - Bán, Sándor AU - Major, István AU - Haszpra, László AU - Molnár, Mihály TI - A HEGYHÁTSÁLI LÉGKÖRI MEGFIGYELŐÁLLOMÁS MODERNIZÁLÁSA ÉS BEILLESZTÉSE AZ ICOS ERIC HÁLÓZATBA PY - 2022 UR - https://m2.mtmt.hu/api/publication/34056397 ID - 34056397 LA - Hungarian DB - MTMT ER - TY - CONF AU - Baráth, Balázs Áron AU - Varga, Tamás AU - Bán, Sándor AU - Major, István AU - Haszpra, László AU - Molnár, Mihály TI - A HEGYHÁTSÁLI LÉGKÖRI MEGFIGYELŐÁLLOMÁS MODERNIZÁLÁSA ÉS BEILLESZTÉSE AZ ICOS ERIC HÁLÓZATBA T2 - A Magyar Tudományos Akadémia Analítikai és Környezetkémiai Bizottságának 10. Környezetkémiai Szimpóziuma PY - 2022 SP - 20 UR - https://m2.mtmt.hu/api/publication/34056396 ID - 34056396 LA - Hungarian DB - MTMT ER - TY - THES AU - Varga, Tamás TI - Radiokarbon alapú módszerek alkalmazása természetes- és antropogén szénforrások azonosítására PY - 2022 SP - 131 UR - https://m2.mtmt.hu/api/publication/33665489 ID - 33665489 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Major, István AU - Molnár, Mihály AU - Futó, István AU - Gergely, Virág AU - Bán, Sándor AU - Machon, Attila AU - Salma, Imre AU - Varga, Tamás TI - Detailed Carbon Isotope Study of PM2.5 Aerosols at Urban Background, Suburban Background and Regional Background Sites in Hungary JF - ATMOSPHERE J2 - ATMOSPHERE-BASEL VL - 13 PY - 2022 IS - 5 SN - 2073-4433 DO - 10.3390/atmos13050716 UR - https://m2.mtmt.hu/api/publication/32801653 ID - 32801653 N1 - INTERACT Centre, Institute for Nuclear Research, P.O. Box 51, Debrecen, H-4001, Hungary Air Quality Reference Center, Hungarian Meteorological Service, Budapest, H-1181, Hungary Institute of Chemistry, Eötvös Lóránd University, P.O. Box 32, Budapest, H-1518, Hungary Doctoral School of Physics, University of Debrecen, Debrecen, H-4032, Hungary Export Date: 1 June 2022 Correspondence Address: Major, I.; INTERACT Centre, P.O. Box 51, Hungary; email: major.istvan@atomki.hu Correspondence Address: Varga, T.; INTERACT Centre, P.O. Box 51, Hungary; email: varga.tamas@atomki.hu LA - English DB - MTMT ER - TY - JOUR AU - Panyushkina, Irina AU - Livina, Valerie AU - Molnár, Mihály AU - Varga, Tamás AU - Jull, Timothy AJ TI - SCALING THE 14 C-EXCURSION SIGNAL IN MULTIPLE TREE-RING SERIES WITH DYNAMIC TIME WARPING JF - RADIOCARBON J2 - RADIOCARBON VL - 64 PY - 2022 IS - 6 SP - 1587 EP - 1595 PG - 9 SN - 0033-8222 DO - 10.1017/RDC.2022.25 UR - https://m2.mtmt.hu/api/publication/32791479 ID - 32791479 N1 - Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721, United States Data Science Department, National Physical Laboratory, Teddington, TW11 0LW, United Kingdom Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research, Debrecen, 4026, Hungary Department of Geosciences and Department of Physics, University of Arizona, Tucson, AZ 85721, United States Export Date: 9 June 2022 CODEN: RACAA Correspondence Address: Panyushkina, I.; Laboratory of Tree-Ring Research, United States; email: ipanyush@arizona.edu LA - English DB - MTMT ER -