TY - JOUR AU - Papp, Vanda AU - Papp, István AU - Janovics, Róbert AU - Nemes, Zoltán AU - Kéri, Mónika TI - RADIOAKTÍV HULLADÉKOK KOMPLEXKÉPZŐ TARTALMÁNAK HATÁSA A KÖTŐANYAG SZERKEZETÉRE ÉS KIOLDHATÓSÁGÁRA JF - SUGÁRVÉDELEM J2 - SUGÁRVÉDELEM VL - XVII PY - 2024 IS - 1 SP - 1 EP - 14 PG - 14 SN - 2060-2391 UR - https://m2.mtmt.hu/api/publication/34720914 ID - 34720914 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Papp, Vanda AU - Janovics, Róbert AU - Kertész, Tamás Péter AU - Nemes, Zoltán AU - Fodor, Tamás AU - Bányai, István AU - Kéri, Mónika TI - State and role of water confined in cement and composites modified with metakaolin and additives JF - JOURNAL OF MOLECULAR LIQUIDS J2 - J MOL LIQ VL - 388 PY - 2023 PG - 10 SN - 0167-7322 DO - 10.1016/j.molliq.2023.122716 UR - https://m2.mtmt.hu/api/publication/34090611 ID - 34090611 N1 - University of Debrecen, Department of Physical Chemistry, Egyetem tér 1, Debrecen, H-4032, Hungary Isotoptech Zrt., Debrecen, H-4026, Hungary International Radiocarbon AMS Competence and Training Center INTERACT, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary Institute for Nuclear Research, H-4026, Debrecen, Bem tér 18/C, Hungary Export Date: 15 August 2023 CODEN: JMLID Correspondence Address: Papp, V.; University of Debrecen, Egyetem tér 1, Hungary; email: papp.vanda@science.unideb.hu AB - Cement as a porous material contains pores and cracks on the whole nanoscale forming an interconnected pore structure. Its interaction with water during the rehydration of cement plays a key role in every application, such as in nuclear waste treatment, where cement binders are commonly used for conditioning liquid radioactive waste. In the prediction of the long-term disposal the knowledge of water mobility and distribution in the formed porous cement matrix is essential. In this study we systematically investigate the effects of metakaolin and several components of the liquid phase (complexing agents, model ions, boric acid, etc.) on the hydrated solid structure by various nuclear magnetic resonance (NMR) methods. The novelty lies in the complex use of such non-conventional techniques that separately provide only partial information of the cement structure; however, the gained results complete each other to offer a new approach in the structural study under several conditions. Water mobility is deduced from NMR T2 relaxation distributions and D2O-H2O exchange diffusion measurements, and the conclusion on structural properties is supported by the macropore structure revealed from NMR cryoporometry and SEM (scanning electron microscopy) images, as well as by following the formation of pores and water domains in the curing process with NMR relaxometry. The results confirm that metakaolin was built into the CSH (calcium silicate hydrate) gel region without altering its mesoporous structure, however, it significantly decreased the capillary pore size and the diffusion coefficient of water. Complexing agent concentration between 2 and 20 g/l and the presence of model ions did not cause significant structural changes, while the rehydration decreased the size of capillary pores due to swelling. LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Anita AU - Molnár, Mihály AU - Veres, Mihály AU - Czébely, Andrea AU - Rinyu, László AU - Rozmanitz, P J AU - Janovics, Róbert TI - DETERMINATION OF THE TOTAL 14 C CONCENTRATION OF WATER SAMPLES USING THE COD METHOD AND AMS JF - RADIOCARBON J2 - RADIOCARBON VL - 64 PY - 2022 IS - 5 SP - 1065 EP - 1074 PG - 10 SN - 0033-8222 DO - 10.1017/RDC.2022.42 UR - https://m2.mtmt.hu/api/publication/32890354 ID - 32890354 N1 - University of Debrecen, Doctoral School of Physics, Debrecen, H-4001, Hungary Isotoptech Zrt. Bem tér 18/c, Debrecen, H-4026, Hungary Interact Centre, Institute for Nuclear Research, Bem tér 18/c, Debrecen, H-4026, Hungary Paks Nuclear Power Plant, Paks, H-7031, Hungary Export Date: 28 October 2022 CODEN: RACAA Correspondence Address: Molnár, A.; University of Debrecen, Hungary; email: molnaranita@isotoptech.hu LA - English DB - MTMT ER - TY - GEN AU - Molnár, Mihály AU - Janovics, Róbert AU - Gergely, Virág AU - Sóvágó, Dávid AU - Baráth, Balázs Áron AU - Gergely, Orsovszki AU - Veres, Mihály AU - Molnár, Anita TI - Application of an automated AGE-CHS unit for water DIC-14 analyses at HEKAL Laboratory CY - 15-19 November 2021 Sydney Ausztrália PY - 2021 UR - https://m2.mtmt.hu/api/publication/34062103 ID - 34062103 LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Mihály AU - Mészáros, Marianna AU - Janovics, Róbert AU - Major, István AU - Hubay, Katalin AU - Buró, Botond AU - Varga, Tamás AU - Kertész, Gréta Titanilla AU - Gergely, Virág AU - Vas, Ádám AU - Orsovszki, Gergely AU - Molnár, Anita AU - Veres, Mihály AU - Seiler, Martin AU - Wacker, Lukas AU - Jull, Timothy AJ TI - GAS ION SOURCE PERFORMANCE OF THE ENVIRONMICADAS AT HEKAL 4 LABORATORY, DEBRECEN, HUNGARY JF - RADIOCARBON J2 - RADIOCARBON VL - 63 PY - 2021 IS - 2 SP - 499 EP - 511 PG - 13 SN - 0033-8222 DO - 10.1017/RDC.2020.109 UR - https://m2.mtmt.hu/api/publication/31891333 ID - 31891333 N1 - Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary Isotoptech Zrt., Debrecen, H-4026, Hungary National Laboratory for Age Determination, Ntnu, Trondheim, NO-7491, Norway Laboratory for Ion Beam Physics, Eth Zürich, Zürich, CH-8093, Switzerland University of Arizona Ams Laboratory, University of Arizona, Tucson, AZ 85721, United States University of Debrecen, Debrecen, H-4001, Hungary University of Arizona, Department of Geosciences, Tucson, AZ 85721, United States Export Date: 4 January 2023 CODEN: RACAA Correspondence Address: Molnár, M.; Isotope Climatology and Environmental Research Centre, Bem tér 18/C, Hungary; email: molnar.mihaly@atomki.mta.hu LA - English DB - MTMT ER - TY - CONF AU - Molnár, Mihály AU - Janovics, Róbert AU - Major, István AU - Hubay, Katalin AU - Buró, Botond AU - Varga, Tamás AU - Kertész, Gréta Titanilla AU - Gergely, Virág AU - Veres, Mihály AU - Jull, Timothy AJ ED - Montanari, A ED - Buiter, S TI - EnvironMICADAS C-14 AMS Gas ion source performance and its applications at HEKAL Laboratory, Debrecen, Hungary T2 - EGU General Assembly 2020: Abstracts PY - 2020 UR - https://m2.mtmt.hu/api/publication/31996326 ID - 31996326 LA - English DB - MTMT ER - TY - JOUR AU - Roll, M AU - Perşoiu, A AU - Nováková, T AU - Navrátil, T AU - Rohovec, J AU - Zák, K AU - Bella, P AU - Bihari, Árpád AU - Kern, Zoltán AU - Janovics, Róbert AU - Piotrowska, N TI - Testing cave ice as an archive of historic mercury (Hg) deposition: the Dobšiná Ice Cave pilot study JF - ARAGONIT J2 - ARAGONIT VL - 25 PY - 2020 IS - 1 SP - 53 SN - 1335-213X UR - https://m2.mtmt.hu/api/publication/31334359 ID - 31334359 LA - English DB - MTMT ER - TY - JOUR AU - Rinyu, László AU - Janovics, Róbert AU - Molnár, Mihály AU - Kisvárday, Zoltán AU - Kemény-Beke, Ádám TI - Radiocarbon Map of a Bomb-Peak Labeled Human Eye JF - RADIOCARBON J2 - RADIOCARBON VL - 62 PY - 2020 IS - 1 SP - 189 EP - 196 PG - 8 SN - 0033-8222 DO - 10.1017/RDC.2019.78 UR - https://m2.mtmt.hu/api/publication/30790743 ID - 30790743 N1 - Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research (ATOMKI), Hungarian Academy of Sciences, Bem ter 18/c, Debrecen, 4026, Hungary MTA-Debreceni Egyetem Neuroscience Research Group, Nagyerdei krt. 98, Debrecen, 4032, Hungary Department of Ophthalmology, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, 4032, Hungary Export Date: 14 February 2020 CODEN: RACAA Correspondence Address: Rinyu, L.; Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research (ATOMKI), Hungarian Academy of Sciences, Bem ter 18/c, Hungary; email: rinyu.laszlo@atomki.mta.hu LA - English DB - MTMT ER - TY - JOUR AU - Janovics, Róbert AU - Futó, István AU - Molnár, Mihály TI - Sealed Tube Combustion Method with MnO2 for AMS 14C Measurement JF - RADIOCARBON J2 - RADIOCARBON VL - 60 PY - 2018 IS - 5 SP - 1347 EP - 1355 PG - 9 SN - 0033-8222 DO - 10.1017/RDC.2018.110 UR - https://m2.mtmt.hu/api/publication/30338124 ID - 30338124 N1 - Export Date: 7 January 2019 CODEN: RACAA Correspondence Address: Janovics, R.; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research DebrecenHungary; email: janovics@atomki.hu Export Date: 22 February 2021 CODEN: RACAA Correspondence Address: Janovics, R.; Isotope Climatology and Environmental Research Centre, Hungary; email: janovics@atomki.hu Export Date: 3 May 2021 CODEN: RACAA Correspondence Address: Janovics, R.; Isotope Climatology and Environmental Research Centre, Hungary; email: janovics@atomki.hu LA - English DB - MTMT ER - TY - JOUR AU - Varga, Tamás AU - Major, István AU - Janovics, Róbert AU - Kurucz, Júlia AU - Veres, Mihály AU - Jull, Timothy AJ AU - Péter, Mónika AU - Molnár, Mihály TI - High-Precision Biogenic Fraction Analyses of Liquid Fuels by 14C AMS at HEKAL JF - RADIOCARBON J2 - RADIOCARBON VL - 60 PY - 2018 IS - 05 SP - 1317 EP - 1325 PG - 9 SN - 0033-8222 DO - 10.1017/RDC.2018.109 UR - https://m2.mtmt.hu/api/publication/30338101 ID - 30338101 N1 - Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, Hungary Isotoptech Zrt Debrecen, Hungary Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States AMS Laboratory, University of Arizona, Tucson, AZ 85721, United States MOL Nyrt, Research and Development, Refining Product Development, Százhalombatta, Hungary Export Date: 7 January 2019 CODEN: RACAA Correspondence Address: Molnár, M.; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki)Hungary; email: molnar.mihaly@atomki.mta.hu Part number: 2 Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, Hungary Isotoptech Zrt Debrecen, Hungary Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States AMS Laboratory, University of Arizona, Tucson, AZ 85721, United States MOL Nyrt, Research and Development, Refining Product Development, Százhalombatta, Hungary Export Date: 22 February 2021 CODEN: RACAA Correspondence Address: Molnár, M.; Isotope Climatology and Environmental Research Centre, Hungary; email: molnar.mihaly@atomki.mta.hu Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, Hungary Isotoptech Zrt Debrecen, Hungary Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States AMS Laboratory, University of Arizona, Tucson, AZ 85721, United States MOL Nyrt, Research and Development, Refining Product Development, Százhalombatta, Hungary Export Date: 3 May 2021 CODEN: RACAA Correspondence Address: Molnár, M.; Isotope Climatology and Environmental Research Centre, Hungary; email: molnar.mihaly@atomki.mta.hu LA - English DB - MTMT ER -