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Your search keyword '"Csedreki, László"' showing total 19 results
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19 results on '"Csedreki, László"'

1. Underground Measurements of Nuclear Reaction Cross-Sections Relevant to AGB Stars

Author

Ananna, Chemseddine, Barile, Francesco, Boeltzig, Axel, Bruno, Carlo Giulio, Cavanna, Francesca, Ciani, Giovanni Francesco, Compagnucci, Alessandro, Csedreki, Laszlo, Depalo, Rosanna, Ferraro, Federico, Masha, Eliana, Piatti, Denise, Rapagnani, David, and Skowronski, Jakub

Subjects
Nuclear Experiment
Abstract

Nuclear reaction cross sections are essential ingredients to predict the evolution of AGB stars and understand their impact on the chemical evolution of our Galaxy. Unfortunately, the cross sections of the reactions involved are often very small and challenging to measure in laboratories on Earth. In this context, major steps forward were made with the advent of underground nuclear astrophysics, pioneered by the Laboratory for Underground Nuclear Astrophysics (LUNA). The present paper reviews the contribution of LUNA to our understanding of the evolution of AGB stars and related nucleosynthesis.

Published
2022
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7. Creating Histories

Author

Siklósi, Zsuzsanna, Faragó, Norbert, Dani, János, Csedreki, László, Kertész, Zsófia, Szikszai, Zita, and Szilágyi, Márton

Published
2022

11. Studying stars from the deep underground: the luna experiment and the case of 13C(α,n)16O reaction.

Author

Csedreki, László and Ciani, Giovanni Francesco

Subjects
*TEMPERATURE of stars, *STELLAR evolution, *NUCLEOSYNTHESIS, *CHEMICAL elements, *NUCLEAR astrophysics
Abstract

Understanding the stellar evolution and the origin of chemical elements are the main goals of Nuclear Astrophysics. In the last century, many collaborations worked to develop experiments and accelerators to study in Earth laboratories the main nuclear processes taking place in stars at their relevant temperature. As an example, we present the measurement of the 13C(α,n)16O reaction performed by the LUNA collaboration. [ABSTRACT FROM AUTHOR]

Published
2023
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12. Trace element mapping of two Pyrenean chert deposits by PIXE

Author

Sánchez De La Torre, Marta, Angyal, Anikó, Kertész, Zsófia, Dubernet, Stéphan, Le Bourdonnec, François-Xavier, Csedreki, László, Furu, Enikő, Papp, Enikő, Szoboszlai, Zoltán, Szikszai, Zita, Le Bourdonnec, François-Xavier, IRAMAT-Centre de recherche en physique appliquée à l’archéologie (IRAMAT-CRP2A), Institut de Recherches sur les Archéomatériaux (IRAMAT), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Montaigne-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Montaigne-Université de Technologie de Belfort-Montbeliard (UTBM), SERP-Universitat de Barcelona, Institute for Nuclear Research [Budapest] (ATOMKI), Hungarian Academy of Sciences (MTA), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], [SHS.ARCHEO] Humanities and Social Sciences/Archaeology and Prehistory, [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry, ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract

International audience

Published
2017

15. Nuclear microprobe investigation of the penetration of ultrafine zinc oxide into human skin affected by atopic dermatitis

Author

Szikszai, Zita, Kertész, Zsófia, Bodnár, Edina, Borbíró, István, Kiss, Borbála Katalin, Angyal, Anikó, Csedreki, László, Furu, Enikő, Szoboszlai, Zoltán, Kiss, Árpád Zoltán, and Hunyadi, János

Subjects
Nuclear and High Energy Physics, medicine.medical_specialty, integumentary system, chemistry.chemical_element, Human skin, Atopic dermatitis, Zinc, Penetration (firestop), Orvostudományok, medicine.disease, Klinikai orvostudományok, Dermatology, medicine.anatomical_structure, chemistry, Ultrafine particle, medicine, Stratum corneum, Stratum spinosum, Instrumentation, Barrier function
Abstract

Skin penetration is one of the potential routes for nanoparticles to gain access into the human body. Ultrafine metal oxides, such as titanium dioxide and zinc oxide are widely used in cosmetic and health products like sunscreens. These oxides are potent UV filters and the particle size smaller than 200 nm makes the product more transparent compared to formulations containing coarser particles. The present study continues the work carried out in the frame of the NANODERM: “Quality of skin as a barrier to ultrafine particles” European project and complements our previous investigations on human skin with compromised barrier function. Atopic dermatitis (a type of eczema) is an inflammatory, chronically relapsing, non-contagious skin disease. It is very common in children but may occur at any age. The exact cause of atopic dermatitis is unknown, but is likely due to a combination of impaired barrier function together with a malfunction in the body’s immune system. In this study, skin samples were obtained from two patients suffering from atopic dermatitis. Our results indicate that the ultrafine zinc oxide particles, in a hydrophobic basis gel with an application time of 2 days or 2 weeks, have penetrated deeply into the stratum corneum in these patients. On the other hand, penetration into the stratum spinosum was not observed even in the case of the longer application time.

Published
2011

19. STUDY OF HEAVY METAL POLLUTION OF THE UPPER-TISZA FLOODPLAIN USING XRF TECHNIQUES.

Author

Csedreki, László, Csatári, István, and Szabó, Szilárd

Subjects
*HEAVY metal toxicology, *HEAVY metals & the environment, *POLLUTION, *METALLURGY, *PROPERTIES of matter
Abstract

The increased level of heavy-metals in the sediments of floodplains is strongly related to the Romanian metalwork. Different heavy metals (eg. Cu, Zn, Pb) often accumulate in the silt of the ore spoil bank and they can become a serious source of environmental pollution. In this study the heavy metal content of the floodplain of the Tisza-Kraszna crossing was determined with the help of energy-dispersive X-ray fluorescence spectrometry (ED-XRF), and particle induced X-ray emission (PIXE) method. Cu and Zn concentration values were compared with data obtained from Flame Atomic Absorption Spectrometry (F-AAS). The depth profile of the sampling territory was determined for Cu, Zn, and Pb concentrations. We carried out toxicological experiments with Synapis alba germination and root elongation to decide how the exceedance of the limit of geological agent affected the vegetation. [ABSTRACT FROM AUTHOR]

Published
2011

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