Temat: Spin - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Antioxidant properties of wines produced in the Podkarpacie region
Autorzy:: Szterk, A.
Stefaniuk, I.
Cieniek, B.
Kuźma, M.
Powiązania:: https://bibliotekanauki.pl/articles/147112.pdf
Data publikacji:: 2013
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: electron spin resonance (ESR)
POBN spin trap
superoxide radial anion
Polish wines
Opis:: The wine is famous and popular drink having properties of reactive oxygen species scavenging. In this paper we study the antioxidant activity of the selected wines produced in the south-east region of Poland, in Subcarpathian Voivodeship, in the Podkarpacie region. We have concentrated our studies on the superoxide radical anion O2 •–. We have used electron spin resonance spectroscopy (ESR) as it is the best method for radical detection. The nitrone spin trap α-(4-pyridyl-1-oxide)-N-tert-butylnitrone (POBN) has been used in the experiment. The radical scavenging ability of wines were determined from the changing intensity of the spectrum in time.
Źródło:: Nukleonika; 2013, 58, 3; 447-450
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: EMR study and superposition model analysis of Cr3+ and Fe3+ impurity ions in mullite powders used in aerospace industry
Autorzy:: Stefaniuk, I.
Rogalska, I..
Powiązania:: https://bibliotekanauki.pl/articles/146307.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: electron magnetic resonance (EMR)
mullites
spin Hamiltonian (SH)
superposition model (SPM)
Opis:: In this work, the electron magnetic resonance (EMR) spectra of the mullites powders were measured for different grain sizes (0.07 and 0.12 mm). We have used EMR spectroscopy at X-band, combined with superposition model (SPM) calculations to reveal electronic structure and establish correlations between structure, and surroundings of these complexes.
Źródło:: Nukleonika; 2015, 60, No. 3, part 1; 399-403
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Computer program superposition model - Monte Carlo (SPM-MC) and its applications in EMR studies of transition ions at low symmetry sites Fe3+ doped YAP crystals
Autorzy:: Stefaniuk, I.
Rudowicz, Cz.
Powiązania:: https://bibliotekanauki.pl/articles/146564.pdf
Data publikacji:: 2013
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: superposition model (SPM)
spin Hamiltonian (SH)
yttrium aluminum perovskite (YAP)
YAlO3
Opis:: An extension of the computer program superposition model-Monte Carlo (SPM-MC), designed for modelling of the spectroscopic and structural properties of transition ions at low symmetry sites in crystals, is presented. Special focus is put on two aspects. The first aspect concerns the effects of variation of the superposition model (SPM) parameters, i.e. the intrinsic parameters (b2, b4) and power low exponents (t2, t4), on the quality of fittings of experimental data and theoretical predictions. This enables to increase the reliability of the modelling results. The second aspect concerns the implications of low site symmetry on modelling of the pertinent properties. Applications of the program SPM-MC to Fe3+ ions at the triclinic (Ci) symmetry sites in YAlO3 (YAP) crystals are considered.
Źródło:: Nukleonika; 2013, 58, 3; 397-400
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Electron paramagnetic resonance studies of manganese and cobalt ions in YAlO3 crystals
Autorzy:: Stefaniuk, I.
Rogalska, I
Suchocki, A
Berkowski, M.
Cieniek, B.
Potera, P.
Powiązania:: https://bibliotekanauki.pl/articles/174068.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: electron paramagnetic resonance (EPR)
spin Hamiltonian
Mn2+
Mn4+
Co2+
Fe3+
Cr3+
Nd3+ and Er3+ ions
YAlO3 (YAP) crystals
Opis:: The results of X-band electron paramagnetic resonance measurements of Mn2+ and Mn4+ ions in YAlO3 (YAP) crystals in the temperature range 100–300 K are presented. Additionally, we observe electron paramagnetic resonance spectra of unintentional impurities Fe3+ and Cr3+ in YAP crystals. The angular dependence for Mn ions in YAP crystals can be presented. We aim at obtaining a better insight into the spectroscopic properties of paramagnetic Mn centers and structural information about their nearest environment in YAP host and at determining the valence of manganese ion. In this paper we compare electron paramagnetic resonance spectra for Co and Mn ions in YAP crystals.
Źródło:: Optica Applicata; 2014, 44, 1; 113-121
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

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