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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Uso da dialise no fracionamento de terras raras

FERREIRA, JOAO C. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:49:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:09:55Z (GMT). No. of bitstreams: 1 09625.pdf: 6160972 bytes, checksum: 2ae10c10ff511fd097547d0090886d18 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
52

Compostos de adicao dos percloratos de elementos lantanidicos e de itrio com a N, N, N', N', tetrametilamida do acido ftalico (TMAF)

SILVA, CONSTANCIA P.G. da 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:23:21Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:56:06Z (GMT). No. of bitstreams: 1 00618.pdf: 1570584 bytes, checksum: 5629fbad13048030f32991bd56f64a58 (MD5) / Tese (Doutoramento) / IEA/T / Instituto de Quimica, Universidade de Sao Paulo - IQ/USP
53

Uso da dialise no fracionamento de terras raras

FERREIRA, JOAO C. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:49:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:09:55Z (GMT). No. of bitstreams: 1 09625.pdf: 6160972 bytes, checksum: 2ae10c10ff511fd097547d0090886d18 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
54

Synthesis, crystal structures and molecular modelling of rare earth complexes with bis(2-pyridylmethyl)amine: aim topological analysis and ligand conformation search

Matthews, Cameron January 2017 (has links)
Eight rare earth complexes with bis(2-pyridylmethyl)amine (DPA) were synthesised and recrystallised, under air-sensitive or low moisture conditions. The crystal structures were successfully determined, via SC-XRD, and the asymmetric units of five complexes (1, 3, 5, 6 and 7) were submitted for DFT molecular modelling calculations, which involved geometry optimisation and frequency calculations. The neutral complexes obtained were bis(bis(2-pyridylmethyl)amine)-trichloro-lanthanum(III) [LaCl3(DPA)2] (1), bis(bis(2-pyridylmethyl)amine)-trichloro-cerium(III)) [CeCl3(DPA)2] (2), bis(μ2-chloro)-diaqua-tetrachloro-bis(bis(2-pyridylmethyl)amine)-di-praseodymium(III) [PrCl2(μ-Cl)(DPA)(OH2)]2 (3) and bis(μ2-methoxo)-bis(bis(2-pyridylmethyl)amine)- tetrachloro-di-dysprosium(III) [DyCl2(μ-OCH3)(DPA)]2 (4). The cationic complexes obtained in this study were dichloro-bis(bis(2-pyridylmethyl)amine)- neodymium(III) chloride methanol solvate [NdCl2(DPA)2]Cl·CH3OH (5), dichloro-bis(bis(2- pyridylmethyl)amine)-dysprosium(III) chloride methanol solvate [DyCl2(DPA)2]Cl·CH3OH (6), dichloro-bis(bis(2-pyridylmethyl)amine)-yttrium(III) chloride methanol solvate [YCl2(DPA)2]Cl·CH3OH (7) and dichloro-bis(bis(2-pyridylmethyl)amine)-lutetium(III) chloride methanol solvate [LuCl2(DPA)2]Cl·CH3OH (8). The ‘Quantum theory of atoms in molecules’ approach was used to investigate the electron density topology, primarily in order to investigate the hydrogen and coordination bonds for three of the eight complexes. Two of the neutral complexes contain the ‘early’ rare earth elements lanthanum and praseodymium and one cationic complex contains the ‘late’ lanthanide element dysprosium. Noncovalent interaction analysis was also performed on the aforementioned complexes in order to gain a deeper understanding of the intra-molecular stereo-electronic interactions. Spin density analysis was used to investigate the distribution of unpaired electron density at and around the metal centres of the aforementioned paramagnetic Pr- and Dy-complexes. A ligand conformation search for DPA was undertaken and 32 low energy conformers were identified and their relative energies were determined using two DFT functionals, namely M06 and M06-2X.
55

Decontamination of some selected rare earth isotopes and the gamma radiations of hafnium-172 and -173 /

Bowman, George Price January 1961 (has links)
No description available.
56

The dissociation energies of the gaseous rare-earth monoxides /

Ames, Lynford Lenhart January 1965 (has links)
No description available.
57

Mixedness determination of rare earth-doped ceramics

Czerepinski, Jennifer H. January 2009 (has links)
Thesis (Ph. D.)--Rutgers University, 2009. / "Graduate Program in Ceramic and Materials Science and Engineering." Includes bibliographical references.
58

Synthesis and characterisation of CeO₂, Sm₂O₃ and Sm-doped CeO₂ nanoparticles with unique morphologies /

Bugayeva, Natalia. January 2006 (has links)
Thesis (Ph.D.)--University of Western Australia, 2006.
59

Luminescence properties of rare earth doped III-V and II-VI semiconductors

Alshawa, Amer K. January 2000 (has links)
Thesis (Ph. D.)--Ohio University, June, 2000. / Title from PDF t.p.
60

Photoluminescence and kinetics of zinc oxide doped with rare earths

Patel, Bhavnesh. January 1998 (has links)
Thesis (M.S.)--Ohio University, August, 1998. / Title from PDF t.p.

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