Search results for "Lithium"

showing 10 items of 680 documents

Bis(2-ethylhexyl)phosphoric acid/bis(2-ethylhexyl)amine mixtures as solvent media for lithium-ions: A dynamical study

2016

Abstract The self-diffusion coefficient, the spin-lattice relaxation times and ionic conductivity of lithium ions in liquid mixtures composed of bis(2-ethylhexyl)amine (BEEA) and bis(2-ethylhexyl)phosphoric acid (HDEHP) have been thoroughly investigated as a function of composition and temperature by NMR spectroscopy and conductometry. While the temperature and composition dependence of diffusion coefficients of lithium ions follow the same trend observed for those of the surfactant molecules, the spin-lattice relaxation times of lithium ions and 1 H are remarkably different. The observed behavior has been interpreted in terms of lithium ions diffusion occurring through its association with…

ConductometrySurfactantsInorganic chemistrychemistry.chemical_element02 engineering and technology010402 general chemistrySelf-diffusion coefficients01 natural sciencesSpin-lattice relaxation timechemistry.chemical_compoundColloid and Surface ChemistryPulmonary surfactantLithium ionSpin-lattice relaxation timeSelf-diffusion coefficientsSurfactantsLithium ionMoleculeIonic conductivityPhysics::Chemical PhysicsPhosphoric acidSettore CHIM/02 - Chimica FisicaChemistryNuclear magnetic resonance spectroscopy021001 nanoscience & nanotechnology0104 chemical sciencesSolventLithium0210 nano-technology
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Novel lithocholaphanes: Syntheses, NMR, MS, and molecular modeling studies

2007

Abstract Novel head-to-head lithocholaphanes 6 and 11 have been synthesized via precursors 1 – 5 and 7 – 10 with overall good yields, and characterized by 1 H, 13 C, and 15 N NMR spectroscopy, ESI-TOF mass spectrometry, thermal analysis, and molecular modeling. In addition, the binding abilities of 6 and 11 towards alkali metal cations have been investigated via competitive complexation studies using equimolar mixtures of Li + , Na + , K + , and Rb + -cations, and cholaphanes 6 and 11 . The formation of cation–cholaphane adducts was detected by ESI-TOF mass spectrometry. The trends in these comparative binding studies are nicely reproduced theoretically with PM3 energetically optimized stru…

Coordination sphereMolecular modelChemistryOrganic ChemistryAnalytical chemistrychemistry.chemical_elementNuclear magnetic resonance spectroscopyAlkali metalAnalytical ChemistryRubidiumAdductInorganic ChemistryCrystallographyMoietyLithiumSpectroscopyJournal of Molecular Structure
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Tratamiento psicofarmacológico del trastorno bipolar en América Latina

2011

Objective: This study assessed the treatment preferences among Latin-American psychiatrists for their bipolar disorder patients and if these preferences reflect the current guidelines. Methods: We designed a survey comprised of fourteen questions. All the questions were aimed at the treatment of bipolar I patients only. We distributed the survey by hand or e-mail to psychiatrists in eight different countries: Argentina, Brasil, Colombia, Costa Rica, Ecuador, México, Perú and Venezuela. Between May 2008 and June 2009, we were able to gather 1143 surveys. Results: As the initial choice of treatment for a bipolar patient who debuts with mania, 61.3% choose a combination of an atypical antipsyc…

Costa RicaBipolar Disorder//purl.org/pe-repo/ocde/ford#3.02.24 [https]ArgentinaAtypical Antipsychotic AgentColombiaLamotrigineLithium CarbonatePsychopharmacotherapyPeruMood StabilizerAntidepressant AgentPatternsMexicoDrug ChoiceVenezuelaTreatmentPsychiatry and Mental healthManiaOlanzapineAcute DiseaseBipolarLatin-AmericaEcuadorSouth And Central AmericaBrazil
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Cold-atom thermoelectrics

2013

Two coupled reservoirs of cold atoms can be used as a model system to study the thermoelectric effect. [Also see Report by Brantut et al. ]

Coupling0303 health sciencesMultidisciplinaryMaterials scienceta114business.industrychemistry.chemical_elementCloud computing010402 general chemistryThermoelectric materials01 natural sciencesEngineering physics0104 chemical sciences03 medical and health scienceschemistryUltracold atomThermoelectric effectParticleLithiumElectric powerbusiness030304 developmental biologyScience
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On the nuclear response of the helium-cooled lithium lead test blanket module in ITER

2005

Abstract The helium-cooled lithium lead (HCLL) concept has been recently selected as one of the two European reference designs foreseen for the breeding blanket of a demonstration fusion reactor. In particular, within the framework of the research and development activities on this blanket line, an HCLL test blanket module (TBM) has to be designed and manufactured to be implemented in ITER. At the Department of Nuclear Engineering (DIN) of the University of Palermo, a research campaign has been carried out to investigate the nuclear response of HCLL-TBM inside ITER by a numerical approach based on the Monte Carlo method. A realistic 3D heterogeneous model of HCLL-TBM has been set-up and ins…

CryostatMaterials scienceMechanical EngineeringNuclear engineeringMonte Carlo methodchemistry.chemical_elementBlanketFusion powerNuclear Energy and EngineeringchemistryTest blanket moduleHCLL-blanketNeutronicsRadiation damageNeutron sourceGeneral Materials ScienceLithiumSettore ING-IND/19 - Impianti NucleariHeliumCivil and Structural EngineeringFusion Engineering and Design
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A study of the potential influence of frame coolant distribution on the radiation-induced damage of HCLL-TBM structural material

2008

Abstract Within the European Fusion Technology Programme, the Helium-Cooled Lithium Lead (HCLL) breeding blanket concept is one of the two EU lines to be developed for a Long Term fusion reactor, in particular with the aim of manufacturing a Test Blanket Module (TBM) to be implemented in ITER. The HCLL-TBM is foreseen to be located in an ITER equatorial port, being housed inside a steel-supporting frame, actively cooled by pressurized water. That supporting frame has been designed to house two different TBMs, providing two cavities separated by a dividing Plate 20 cm thick. As the nuclear response of HCLL-TBM might vary accordingly to the supporting frame configuration and composition, at t…

CryostatNeutron transportMaterials scienceMechanical EngineeringNuclear engineeringFrame (networking)Fusion powerBlanketCoolantNuclear Energy and EngineeringNeutron sourceGeneral Materials ScienceLithium-lead blanket TBM NeutronicsSettore ING-IND/19 - Impianti NucleariCivil and Structural EngineeringParametric statisticsFusion Engineering and Design
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Study of the helium-cooled lithium lead test blanket module nuclear behaviour under irradiation in ITER

2009

Abstract The present paper deals with the detailed investigation of the helium-cooled lithium lead test blanket module (HCLL-TBM) nuclear behaviour under irradiation in ITER, carried out at the Department of Nuclear Engineering of the University of Palermo adopting a numerical approach based on the Monte Carlo method. A realistic 3D heterogeneous model of the HCLL-TBM was set-up and inserted into an ITER 3D semi-heterogeneous model that realistically simulates the reactor lay-out up to the cryostat. A Gaussian-shaped neutron source was adopted for the calculations. The main features of the HCLL-TBM nuclear response were assessed, paying a particular attention to the neutronic and photonic d…

CryostatNeutron transportTokamakMaterials scienceMechanical EngineeringNuclear engineeringchemistry.chemical_elementFusion powerBlanketHCLL test blanket module Neutronics Monte Carlo methodlaw.inventionNuclear physicsNuclear Energy and EngineeringchemistrylawNeutron sourceGeneral Materials ScienceLithiumSettore ING-IND/19 - Impianti NucleariHeliumCivil and Structural EngineeringFusion Engineering and Design
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<title>Manifestation of structural features in Raman spectra of LiNbO<formula><inf><roman>3</roman></inf></for…

2008

Raman studies of ostensibly pure congruent, close to stoichiometric and stoichiometric lithium niobate single crystals and single crystals of lithium niobate containing admixture of Gd3+, Y+, and Mg2+ are reported. The authors have revealed weak Raman bands anomalously narrowing at changes of crystal composition disordering the cation sublattice and discuss the results with regard to evidence of anomalous ordering of structural units of the cation sublattice occurring at disordering of the cation sublattice as a whole.© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

CrystalCrystallographychemistry.chemical_compoundsymbols.namesakeMaterials sciencechemistryRaman bandOptical materialsLithium niobatesymbolsRaman spectroscopyStoichiometrySPIE Proceedings
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1981

Crystallization kineticschemistry.chemical_compoundchemistryInorganic chemistryLithium chlorideDie Makromolekulare Chemie, Rapid Communications
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Colour centres in LiBaF3 crystals

1998

Abstract The origin of the absorption bands in LiBaF 3 created by X-ray irradiation at RT has been investigated. It is found that three absorption bands at 270, 320 and 430 nm represent different electron transitions within a radiation defect effectively created in LiBaF 3 single crystals. Following the Mollwo–Ivey relation we discuss investigations of optical dichroism, magnetic optical dichroism, as well as the assumptions regarding the accumulation kinetics of these absorption bands, the F centre being the main radiation defect created by X-rays in undoped LiBaF 3 crystals at RT.

CrystallographyRadiationAbsorption spectroscopyChemistryAtomic electron transitionchemistry.chemical_elementLithiumIrradiationRadiationDichroismAbsorption (electromagnetic radiation)InstrumentationMolecular physicsRadiation Measurements
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