Autor: Sterniczuk, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: EPR study of γ-irradiated feather keratin and human fingernails concerning retrospective dose assessment
Autorzy:: Strzelczak, G.
Sterniczuk, M.
Sadło, J.
Kowalska, M.
Michalik, J.
Powiązania:: https://bibliotekanauki.pl/articles/148231.pdf
Data publikacji:: 2013
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: EPR spectroscopy
keratin
melanin
radicals
fingernails
dosimetry
Opis:: In this paper we report the results of comparative EPR studies on free radicals generated in γ-irradiated powder samples of feather keratin powder and human fingernails. In degassed samples of both materials irradiated at 77 K the major component of EPR spectrum represents sulphur-centred radicals in cysteine residues. It quickly decays after air admission at room temperature while a singlet assigned to semiquinone melanin radicals remains the only one seen. The singlet recorded with fingernails decays slowly at room temperature and might be potentially useful for dose assessment by EPR. The advantages and limitations of fingernails EPR dosimetry are discussed.
Źródło:: Nukleonika; 2013, 58, 4; 505-509
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Multifrequency EPR study on radiation induced centers in calcium carbonates labeled with 13C
Autorzy:: Sadło, J.
Bugaj, A.
Strzelczak, G.
Sterniczuk, M.
Jaegermann, Z.
Powiązania:: https://bibliotekanauki.pl/articles/146101.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: aragonite
calcite
dosimetry
EPR spectroscopy
γ-irradiation
radicals
Opis:: In calcite and aragonite, γ-irradiated at 77 K, several paramagnetic centers were generated and detected by EPR spectroscopy; in calcite, CO3 – (orthorhombic symmetry, bulk and bonded to surface), CO3 3–, NO3 2–, O3 –, and in aragonite CO2 – (isotropic and orthorhombic symmetry) depending on the type of calcium carbonate used. For calcium carbonates enriched with 13C more detailed information about the formed radicals was possible to be obtained. In both natural (white coral) and synthetic aragonite the same radicals were identifi ed with main differences in the properties of CO2 – radicals. An application of Q-band EPR allowed to avoid the signals overlap giving the characteristics of radical anisotropy.
Źródło:: Nukleonika; 2015, 60, No. 3, part 1; 429-434
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

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