Results 11 to 20 of about 23,819 (265)
F-rationality of Rees algebras [PDF]
Journal of Algebra, 2021 In this paper, we study the $F$-rationality of the Rees algebra and the extended Rees algebra of $\mathfrak{m}$-primary ideals in excellent local rings $(R, \mathfrak{m})$ of prime characteristic. We partially answer some conjectures and questions raised by N. Hara, K.-i. Watanabe and K.-i. Yoshida (J. Algebra, pp.153--190, vol 247, 2002).
Mitra Koley, Manoj Kummini
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Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022 The peculiarities of the rare-earth elements distribution in the surface bottom sediments in the Gulf of Tonkin (South China Sea) are considered. According to the results of granulometric analysis, the sediments are mainly represented by pelitic silt ...
Легкодимов А.А. +2 more
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Selective flotation of phosphorus-bearing ores [PDF]
E3S Web of Conferences, 2020 This paper presents the results of the beneficiation of a phosphorus-bearing mineral through selective flotation process. The chemical examination showed that the sample contain a low content of P2O5 12.5 % and significant amounts of rare earth elements (
Elbendari Abdalla +3 more
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Pakistan Journal of Analytical & Environmental Chemistry, 2023 Rare earth elements (REEs) exist commonly in minerals, such as carbonates, silicates, fluorides, and phosphates. REEs are also found in coals, animals, algae, and plants which were proven to increase the growth, development, yield, and quality of crops ...
Le Quang-Huy +4 more
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Nagoya Mathematical Journal, 2010 Abstract We give an explicit construction of the Ree groups of type G2 as groups acting on mixed Moufang hexagons together with detailed proofs of the basic properties of these groups contained in the two fundamental papers of Tits on this subject (see [7] and [8]). We also give a short proof that the norm of a Ree group is anisotropic.
De Medts, Tom, Weiss, Richard M.
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Petrogenisis of Mafic- intermediate Magmatism, East of Sanandaj; A New approach with careful monitoring of geochemical evidences [PDF]
پترولوژی, 2019 The East Sanadaj magmatic rocks of the northern Sanandaj-Sirjan Zone, part of Zagros Orogen, comprise several intrusive bodies that were generated during northeastward subduction of Neo-tethys beneath the Iranian sector of the Eurasian plate.
Sanaz Yajam
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MINERALOGICAL-GEOCHEMICAL FEATURES OF ZIRCON FROM THE KUMIR GRANITIC STOCK, GORNY ALTAI [PDF]
Минералогия, 2022 Data on U-Pb age and composition of zircon from the Kumir granitic stock (Gorny Altai) and related greisens are presented for the first time. The magmatic, metamictic and pneumatolytic-hydrothermal zircons exhibit specific changes in main and trace ...
A.I. Gusev
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Concentration and Fractionation of Rare Earth Elements in Soils Surrounding Rare Earth Ore Area
Yankuang ceshi, 2019 BACKGROUND The study on content and fractionation characteristics of rare earth elements (REE) in soils around different types of rare earth mining areas can provide theoretical support and scientific advice for the control of the polluted environment ...
WANG Xue-feng +5 more
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An Essay on the Ree Octagons [PDF]
Journal of Algebraic Combinatorics, 1995 The authors give an explicit coordinatization of the Moufang generalized octagons associated with the Ree groups of type \(^ 2F_ 4\). This approach is used to give numerous applications, e.g. to the study of transitivity properties, suboctagons, subquadrangles and the determination of the groups of projectivities.
Joswig, Michael, Van Maldeghem, H.
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Characterisation of suspended and sedimented particulate matter in blue-green infrastructure ponds
Blue-Green Systems, 2020 Blue-green infrastructure (BGI) ponds have an important function of alleviating flood risk and provide water quality improvements among other multiple benefits.
V. Krivtsov +7 more
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