Author: Johanna Kutuniva

Uusiutuvat energiat : hiilidioksidin hyödyntäminen ja kuivamädätys

2012

Tämän julkaisun ensimmäisessä osassa selvitetään erilaisia mahdollisuuksia hyödyntää bio- ja puukaasun ohella muodostuvaa hiilidioksidia ja erityisesti sen hyötykäyttöä kasvihuoneympäristössä. Toisessa osassa käsitellään kuivamädätysteknologiaa sekä siihen liittyviä käyttökokemuksia kirjallisuuteen ja henkilökohtaisiin haastatteluihin pohjautuen. Julkaisun tarkoituksena on tukea uusiutuvaan energiaan liittyvää tutkimus- ja kehittämistoimintaa.

hiilidioksidikuivamädätysbioenergiauusiutuvat energialähteetmädätyskasvihuoneet

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"Identification of mixed bromidochloridotellurate anions in disordered crystal structures of (bdmim)2[TeX2Y4] (X, Y = Br, Cl; bdmim = 1-butyl-2,3-dim…

2013

Abstract The discrete mixed [TeBrxCl6−x]2− anions in their disordered crystal structures have been identified by using the phases prepared by the reaction of 1-butyl-2,3-dimethylimidazolium halogenides (bdmim)X with tellurium tetrahalogenides TeX4 (X = Cl, Br) as examples. Homoleptic (bdmim)2[TeX6] [X = Cl (1), Br (2)] and mixed (bdmim)2[TeBr2Cl4] (3), and (bdmim)2[TeBr4Cl2] (4) are formed depending on the choice of the reagents, and their crystal structures have been determined by single-crystal X-ray diffraction. The coordination environments of tellurium in all hexahalogenidotellurates are almost octahedral. Because of the crystallographic disorder, the mixed [TeBr2Cl4]2− and [TeBr4Cl2]2…

AnionsBromidesModels MolecularMagnetic Resonance SpectroscopyAb initiochemistry.chemical_elementCrystal structureCrystallography X-RaySpectrum Analysis RamanAnalytical Chemistrysymbols.namesakechemistry.chemical_compoundChloridesX-Ray DiffractionHomolepticInstrumentationta116SpectroscopyMolecular StructureChemistryImidazolesAtomic and Molecular Physics and OpticsCrystallographyOctahedronsymbolsTellurium tetrachlorideQuantum TheoryTelluriumRaman spectroscopyTelluriumPowder diffractionSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

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A New Low Background Laboratory in the Pyhäsalmi Mine : Towards 14C free liquid scintillator for low energy neutrino experiments

2017

A new low background laboratory in Pyhäsalmi mine in the Central Finland has been put into operation in the beginning of 2017. The laboratory operates at the depth of 1436 m (~4100 meters of water equivalent). In this paper, we present description of the laboratory’s existing facility and background conditions. In the laboratory, a series of measurements has been started where the 14C concentration is determined from several liquid scintillator samples. A dedicated setup has been designed and constructed with the aim of measuring the 14C/12C ratio smaller than 10-18 . peerReviewed

Low energyta114research equipmentcosmic radiationNuclear engineeringtutkimuslaitteetneutriinotEnvironmental scienceneutrinosNeutrinoScintillatorWater equivalentkosminen säteily

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Measuring the14C content in liquid scintillators

2016

We are going to perform a series of measurements where the 14C/12 C ratio will be measured from several liquid scintillator samples with a dedicated setup. The setup is designed with the aim of measuring ratios smaller than 10-18. Measurements take place in two underground laboratories: in the Baksan Neutrino Observatory, Russia and in the Pyhasalmi mine, Finland. In Baksan the measurements started in 2015 and in Pyhasalmi they start in the beginning of 2015. In order to fully understand the operation of the setup and its background contributions a development of simulation packages has also been started. Low-energy neutrino detection with a liquid scintillator requires that the intrinsic 1…

Nuclear physicsPhysicsHistoryNeutrino detectorObservatoryMeasuring instrumentScintillatorNeutrinoConcentration ratioParticle detectorBorexinoComputer Science ApplicationsEducationJournal of Physics: Conference Series

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Identification of mixed bromidochloridotellurate anions in disordered crystal structures of (bdmim)2[TeX2Y4] (X, Y = Br, Cl; bdmim = 1-butyl-2,3-dime…

2014

The discrete mixed [TeBrxCl6−x]2− anions in their disordered crystal structures have been identified by using the phases prepared by the reaction of 1-butyl-2,3-dimethylimidazolium halogenides (bdmim)X with tellurium tetrahalogenides TeX4 (X = Cl, Br) as examples. Homoleptic (bdmim)2[TeX6] [X = Cl (1), Br (2)] and mixed (bdmim)2[TeBr2Cl4] (3), and (bdmim)2[TeBr4Cl2] (4) are formed depending on the choice of the reagents, and their crystal structures have been determined by single-crystal X-ray diffraction. The coordination environments of tellurium in all hexahalogenidotellurates are almost octahedral. Because of the crystallographic disorder, the mixed [TeBr2Cl4]2− and [TeBr4Cl2]2− anions …

kristallografiakiinteän tilan DFT laskutbromidochloridotelluratessolid-state DFT calculationsRaman spectroscopyRaman-spektroskopiakidetiedebromidikloriditelluraatit

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