Results 21 to 30 of about 99,879 (261)
Effect of glazing and polishing on opalescence and fluorescence of dental ceramics
Clinical and Experimental Dental Research, Volume 8, Issue 6, Page 1645-1654, December 2022., 2022 Abstract Objective Tooth enamel has opalescence and fluorescence, which should be mimicked by esthetic dental restorations. The purpose of this study was to compare the effects of glazing and polishing on the opalescence and fluorescence of dental ceramics. Materials and Methods Twenty‐four discs were fabricated of feldspathic, IPS e.max, zirconia, and
Sedighe Sadat Hashemikamangar +4 more
wiley +1 more source
Remote Sensing, 2022 Deep learning is a popular topic in machine learning and artificial intelligence research and has achieved remarkable results in various fields. In geological remote sensing, mineral mapping is an appealing application of hyperspectral remote sensing for
Chuan Zhang +5 more
doaj +1 more source
Novel critical behavior of magnetization in URhSi:Similarities to uranium ferromagnetic superconductors UGe$_2$ and URhGe [PDF]
Phys. Rev. B 99, 094417 (2019), 2019 We study the critical behavior of dc magnetization in the uranium ferromagnet URhSi around the paramagnetic to ferromagnetic phase transition at T_C~ 10 K with a modified Arrott plot, a Kouvel-Fisher plot, the critical isotherm analysis and the scaling analysis. URhSi is isostructural to uranium ferromagnetic superconductors URhGe and UCoGe.
arxiv +1 more source
A case for polar uranium octupoles in cubic U2N3 [PDF]
arXiv, 2023 Uranium ions in sesquinitride alpha-U2N3 occupy independent acentric and centrosymmetric sites according to conventional x-ray diffraction patterns [R. Tro\'c, J. Solid State Chem. 13, 14 (1975)]. We submit that polar uranium multipoles in acentric sites are revealed in resonant x-ray diffraction data recently published by Lawrence Bright et al. [Phys.
arxiv
Yankuang ceshi, 2016 Accurate measurement of Argon isotopes is the premise of Ar-Ar dating with high precision. Two main kinds of instruments for Ar isotope measurement are Single-collector and Multi-collector Mass Spectrometers, among which the Multi-collector Noble Gas ...
LI Jun-jie +5 more
doaj +1 more source
Theoretical Modelling of High-Resolution X-Ray Absorption Spectra at Uranium M4 Edge [PDF]
, 2020 We investigate the origin of satellite features that appear in the high-resolution x-ray absorption spectra measured at the uranium M 4 edge in compounds where the uranium atoms are in the U 6+ oxidation state. We employ a material-specific Anderson impurity model derived from the electronic structure obtained by the density-functional theory.
arxiv +1 more source
Nuclear Engineering and Technology, 2021 Uranium ingot is produced by metallothermic reduction of uranium tetrafluoride using magnesium or calcium as reductant. Presence of oxygen containing compounds viz.
Sonal Gupta +3 more
doaj
The chemical state of complex uranium oxides [PDF]
, 2013 We report here the first direct observation of U(V) in uranium binary oxides and analyze the gradual conversion of the U oxidation state in the mixed uranium systems. Our finding clarifies previous contradicting results and provides important input for the geological disposal of spent fuel, recycling applications and chemistry of uranium species.
arxiv +1 more source
Uranium Critical Point Location Problem [PDF]
Journal of Nuclear Materials, V.344, P.30 (2005), 2013 Significant uncertainty of our present knowledge for uranium critical point parameters is under consideration. Present paper is devoted to comparative analysis of possible resolutions for the problem of uranium critical point location, as well as to discussion of plausible scheme of decisive experiment, which could resolve existing uncertainty.
arxiv +1 more source
Computational Study of Very High Spin Actinyl Peroxide Matryoshka Nanoclusters
European Journal of Inorganic Chemistry, Volume 2022, Issue 35, December 16, 2022., 2022 Density functional theory calculations are used to study the geometric and electronic structures of very high spin actinyl peroxide “Matryoshka” nanoclusters, with emphasis on understanding the stability of the highest spin states. Abstract Generalised gradient approximation and hybrid density functional theory is used to study the geometries ...
Nicholas Greaves, Nikolas Kaltsoyannis
wiley +1 more source