@article{MTMT:34720914, title = {RADIOAKTÍV HULLADÉKOK KOMPLEXKÉPZŐ TARTALMÁNAK HATÁSA A KÖTŐANYAG SZERKEZETÉRE ÉS KIOLDHATÓSÁGÁRA}, url = {https://m2.mtmt.hu/api/publication/34720914}, author = {Papp, Vanda and Papp, István and Janovics, Róbert and Nemes, Zoltán and Kéri, Mónika}, journal-iso = {SUGÁRVÉDELEM}, journal = {SUGÁRVÉDELEM}, volume = {XVII}, unique-id = {34720914}, year = {2024}, eissn = {2060-2391}, pages = {1-14}, orcid-numbers = {Papp, István/0000-0002-0006-9919; Kéri, Mónika/0000-0001-9095-8295} } @article{MTMT:34090611, title = {State and role of water confined in cement and composites modified with metakaolin and additives}, url = {https://m2.mtmt.hu/api/publication/34090611}, author = {Papp, Vanda and Janovics, Róbert and Kertész, Tamás Péter and Nemes, Zoltán and Fodor, Tamás and Bányai, István and Kéri, Mónika}, doi = {10.1016/j.molliq.2023.122716}, journal-iso = {J MOL LIQ}, journal = {JOURNAL OF MOLECULAR LIQUIDS}, volume = {388}, unique-id = {34090611}, issn = {0167-7322}, abstract = {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.}, year = {2023}, eissn = {1873-3166}, orcid-numbers = {Bányai, István/0000-0002-6260-9175; Kéri, Mónika/0000-0001-9095-8295} } @article{MTMT:32890354, title = {DETERMINATION OF THE TOTAL 14 C CONCENTRATION OF WATER SAMPLES USING THE COD METHOD AND AMS}, url = {https://m2.mtmt.hu/api/publication/32890354}, author = {Molnár, Anita and Molnár, Mihály and Veres, Mihály and Czébely, Andrea and Rinyu, László and Rozmanitz, P J and Janovics, Róbert}, doi = {10.1017/RDC.2022.42}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {64}, unique-id = {32890354}, issn = {0033-8222}, year = {2022}, eissn = {1945-5755}, pages = {1065-1074}, orcid-numbers = {Molnár, Anita/0000-0003-0380-2212; Czébely, Andrea/0000-0002-6439-2977} } @misc{MTMT:34062103, title = {Application of an automated AGE-CHS unit for water DIC-14 analyses at HEKAL Laboratory}, url = {https://m2.mtmt.hu/api/publication/34062103}, author = {Molnár, Mihály and Janovics, Róbert and Gergely, Virág and Sóvágó, Dávid and Baráth, Balázs Áron and Gergely, Orsovszki and Veres, Mihály and Molnár, Anita}, unique-id = {34062103}, year = {2021}, orcid-numbers = {Molnár, Anita/0000-0003-0380-2212} } @article{MTMT:31891333, title = {GAS ION SOURCE PERFORMANCE OF THE ENVIRONMICADAS AT HEKAL 4 LABORATORY, DEBRECEN, HUNGARY}, url = {https://m2.mtmt.hu/api/publication/31891333}, author = {Molnár, Mihály and Mészáros, Marianna and Janovics, Róbert and Major, István and Hubay, Katalin and Buró, Botond and Varga, Tamás and Kertész, Gréta Titanilla and Gergely, Virág and Vas, Ádám and Orsovszki, Gergely and Molnár, Anita and Veres, Mihály and Seiler, Martin and Wacker, Lukas and Jull, Timothy AJ}, doi = {10.1017/RDC.2020.109}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {63}, unique-id = {31891333}, issn = {0033-8222}, year = {2021}, eissn = {1945-5755}, pages = {499-511}, orcid-numbers = {Major, István/0000-0003-4675-9875; Molnár, Anita/0000-0003-0380-2212} } @CONFERENCE{MTMT:31996326, title = {EnvironMICADAS C-14 AMS Gas ion source performance and its applications at HEKAL Laboratory, Debrecen, Hungary}, url = {https://m2.mtmt.hu/api/publication/31996326}, author = {Molnár, Mihály and Janovics, Róbert and Major, István and Hubay, Katalin and Buró, Botond and Varga, Tamás and Kertész, Gréta Titanilla and Gergely, Virág and Veres, Mihály and Jull, Timothy AJ}, booktitle = {EGU General Assembly 2020: Abstracts}, unique-id = {31996326}, year = {2020}, orcid-numbers = {Major, István/0000-0003-4675-9875} } @article{MTMT:31334359, title = {Testing cave ice as an archive of historic mercury (Hg) deposition: the Dobšiná Ice Cave pilot study}, url = {https://m2.mtmt.hu/api/publication/31334359}, author = {Roll, M and Perşoiu, A and Nováková, T and Navrátil, T and Rohovec, J and Zák, K and Bella, P and Bihari, Árpád and Kern, Zoltán and Janovics, Róbert and Piotrowska, N}, journal-iso = {ARAGONIT}, journal = {ARAGONIT}, volume = {25}, unique-id = {31334359}, issn = {1335-213X}, year = {2020}, pages = {53}, orcid-numbers = {Kern, Zoltán/0000-0003-4900-2587} } @article{MTMT:30790743, title = {Radiocarbon Map of a Bomb-Peak Labeled Human Eye}, url = {https://m2.mtmt.hu/api/publication/30790743}, author = {Rinyu, László and Janovics, Róbert and Molnár, Mihály and Kisvárday, Zoltán and Kemény-Beke, Ádám}, doi = {10.1017/RDC.2019.78}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {62}, unique-id = {30790743}, issn = {0033-8222}, year = {2020}, eissn = {1945-5755}, pages = {189-196} } @article{MTMT:30338124, title = {Sealed Tube Combustion Method with MnO2 for AMS 14C Measurement}, url = {https://m2.mtmt.hu/api/publication/30338124}, author = {Janovics, Róbert and Futó, István and Molnár, Mihály}, doi = {10.1017/RDC.2018.110}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {60}, unique-id = {30338124}, issn = {0033-8222}, year = {2018}, eissn = {1945-5755}, pages = {1347-1355} } @article{MTMT:30338101, title = {High-Precision Biogenic Fraction Analyses of Liquid Fuels by 14C AMS at HEKAL}, url = {https://m2.mtmt.hu/api/publication/30338101}, author = {Varga, Tamás and Major, István and Janovics, Róbert and Kurucz, Júlia and Veres, Mihály and Jull, Timothy AJ and Péter, Mónika and Molnár, Mihály}, doi = {10.1017/RDC.2018.109}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {60}, unique-id = {30338101}, issn = {0033-8222}, year = {2018}, eissn = {1945-5755}, pages = {1317-1325}, orcid-numbers = {Major, István/0000-0003-4675-9875} }