Search results for ":NATURAL SCIENCES"

showing 10 items of 1090 documents

Aleksandra Zāmeļa 1925. gadā ievāktais mazā zvaguļa herbārijs

2019

Raksts par 2019. gada auga mazā zvaguļa Rhinanthus minor herbāriju, ko 1925. gada 20. jūnijā ievācis latviešu botāniķis un iedzimtības pētnieks Aleksandrs Zāmelis, un kas glabājas Latvijas Universitātes Muzeja Botānikas un mikoloģijas kolekciju Latvijas Herbārijā (Herbarium Latvicum).

Alexander Zamelmazais zvagulisyellow rattleHerbarium Latvicumherbārijs:NATURAL SCIENCES::Biology::Organism biology::Plant physiology [Research Subject Categories]Rhinanthus minorAleksandrs Zāmelisherbarium
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STOP 13: Inland dune field near Daugavpils, East-Latvian Lowland

2014

Allerød–Younger Dryas boundarygrain-size analysis:NATURAL SCIENCES::Earth sciences::Exogenous earth sciences::Sedimentology [Research Subject Categories]LatvianAustrumlatvijas zemiene:NATURAL SCIENCES::Earth sciences::Exogenous earth sciences::Quaternary geology [Research Subject Categories]Archaeologyrounding and surface character of quartz grainslanguage.human_languageField (geography)GeographyKvartāra ģeoloģijalanguagePhysical geographyLate Quaternary Terrestrial Processes, Sediments and History: From Glacial to Postglacial Environments
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Stimulated emission and optical properties of pyranyliden fragment containing compounds in PVK matrix

2017

This work has been supported by National Research program “Multifunctional materials and composites, photonics and nanotechnology (IMIS2)”. Financial support provided by Scientific Research Project for Students and Young Researchers No. SJZ2015/12 realised at the Institute of Solid State Physics, University of Latvia is greatly acknowledged.

Amplified spontaneous emissionPhotoluminescenceMaterials scienceQuantum yieldElectron donor02 engineering and technologyPhotochemistry01 natural sciences010309 opticschemistry.chemical_compound0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]Stimulated emissionElectrical and Electronic EngineeringAmplified spontaneous emissionGlass forming low molecular weight compoundsDCMLaser dyeDye laser021001 nanoscience & nanotechnologyThreshold energyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialschemistryPyranyliden derivatives0210 nano-technologyMethyl group
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Reversible Photodoping of TiO2 Nanoparticles for Photochromic Applications

2018

Financial support from the Estonian Research Council (IUT2-25, IUT2-26, and PUTJD680) is gratefully acknowledged. This work was supported by the Academy of Finland (decision numbers 141481 and 286713) and by the EU through the European Regional Development Fund (Center of Excellence for Zero Energy and Resource Efficient Smart Buildings and Districts-ZEBE, 2014-2020.4.01.15-0016). Work is supported by the Latvian Academy of Sciences in the framework of FLPP (Plasmonic oxide quantum dots for energy saving smart windows, lzp-2018/1-0187).

AnataseMaterials scienceGeneral Chemical EngineeringTio2 nanoparticlesPhysics::Optics02 engineering and technologyGeneral ChemistryCondensed Matter::Mesoscopic Systems and Quantum Hall Effect010402 general chemistry021001 nanoscience & nanotechnologyPhotochemistry01 natural sciences7. Clean energy0104 chemical sciencesCondensed Matter::Materials SciencePhotochromismQuantum dot:NATURAL SCIENCES:Physics [Research Subject Categories]Physics::Atomic and Molecular ClustersMaterials Chemistry0210 nano-technologyChemistry of Materials
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Black carbon-doped TiO2 films: Synthesis, characterization and photocatalysis

2019

This research is funded by the European Social Fund according to the activity ‘Improvement of researchers’ qualification by implementing world-class R&D projects’ of Measure No. 09.3.3-LMT- K-712, project „Investigation of the application of TiO2 and ZnO for the visible light assisted photocatalytical disinfection of the biologically contaminated water“ (09.3.3-LMT-K-712-01-0175). The authors express gratitude for the S. Tuckute, M. Urbonavicius, G. Laukaitis and K. Bockute for their valuable input in current work. © 2019. This work is licensed under a CC BY-NC-ND 4.0 license.

AnataseScanning electron microscopeGeneral Chemical EngineeringAnalytical chemistryGeneral Physics and AstronomyCarbon-doped TiO202 engineering and technology010402 general chemistry01 natural sciences7. Clean energyX-ray photoelectron spectroscopyBand gap:NATURAL SCIENCES:Physics [Research Subject Categories]PhotocatalysisVisible lightChemistryBlack TiO2General ChemistryCarbon blackSputter deposition021001 nanoscience & nanotechnology0104 chemical sciencesAmorphous solidCrystallite0210 nano-technologyMagnetron sputteringVisible spectrumJournal of Photochemistry and Photobiology A: Chemistry
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Study of phase composition, photocatalytic activity, and photoluminescence of TiO2 with Eu additive produced by the extraction-pyrolytic method

2021

The Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2. The work was also partially supported by the LZP grant 2020/2-0074. R. Burve has been supported by the project “Synthesis of nanostructured materials based on titanium dioxide and tin dioxide and investigation of their physicochemical properties” Nr. MP-2019/7, for strengthening scientific personnel capacity 2019/2020 at the Riga Technical University. Authors are grateful to Dr. K. Šmits for the microscopic measurements and SEM images.

AnataseThermogravimetric analysisPhotoluminescenceMaterials scienceEu3+Degradation of methylene blueNanocrystalline TiO202 engineering and technologyExtraction-pyrolytic method7. Clean energy01 natural sciencesBiomaterialschemistry.chemical_compoundDifferential scanning calorimetryPhase (matter)0103 physical sciencesPhotoluminescence010302 applied physicsMining engineering. MetallurgyMetals and AlloysTN1-997021001 nanoscience & nanotechnologyNanocrystalline materialSurfaces Coatings and FilmschemistryTitanium dioxideCeramics and CompositesPhotocatalysis:NATURAL SCIENCES [Research Subject Categories]0210 nano-technologyNuclear chemistryJournal of Materials Research and Technology
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On the topography of Herbst's and Grandry's corpuscles in the adult and embryonic duck-bill

1932

Izvilkums no: Acta Zoologica, Bd. 12, 1931.

Anatomy topographicalPutnu anatomija un morfoloģijaAnatomija topogrāfiskāAnatomie topographisch:NATURAL SCIENCES::Biology::Organism biology::Morphology [Research Subject Categories]Vögel Anatomie und MorphologieZooloģija eksperimentālāDzīvnieku morfoloģijaBirds anatomy and morphologyTiermorphologie
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Zur Topographie der Herbst'schen und Grandry'schen Körperchen im adulten und embryonalen Entenschnabel [Herbsta un Grandry ķermenīšu topogrāfija piea…

1931

Teksts vācu valodā, kopsavilkums latviešu valodā.

Anatomy topographicalPutnu anatomija un morfoloģijaAnatomija topogrāfiskāAnatomie topographisch:NATURAL SCIENCES::Biology::Organism biology::Morphology [Research Subject Categories]Vögel Anatomie und MorphologieZooloģija eksperimentālāDzīvnieku morfoloģijaTiermorphologieBirds anatomy and morphology
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Kāda līdz šim nepazīta cikliska amfībiju dzimumpazīme: vardes priekškāju skeleta sezonu variācijas

1924

Atsevišķs iespiedums no: Latvijas Universitātes Raksti, XI. 1924. Kopsavilkums franču valodā.

Animal anatomyDzīvnieku eksperimentiRana temporariaVaržu anatomija un morfoloģijaAnimal organology:NATURAL SCIENCES::Biology::Organism biology::Morphology [Research Subject Categories]Zoologie expérimentaleAnimale anatomieZooloģija eksperimentālāDzīvnieku morfoloģija
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The influence of Sb doping on the local structure and disorder in thermoelectric ZnO:Sb thin films

2023

The experiment at HASYLAB/DESY was performed within the project I-20200161 EC. The research leading to this result has been supported by the project CALIPSOplus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020. Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union's Horizon 2020 Framework Programme H2020-WIDESPREAD-01–2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2. This work was carried out in part through the use of the INL Advanced Electron Microscopy, Imaging and Spectroscopy Facility. This work (proposal ID 2018–020-022469) was car…

AntimonyHistoryTechnologyPolymers and PlasticsThin filmsThermoelectricMechanical EngineeringMetals and AlloysSputtering:NATURAL SCIENCES::Physics [Research Subject Categories]540X-ray absorptionIndustrial and Manufacturing EngineeringMechanics of Materials2021-025-030112ddc:540Materials ChemistryBusiness and International ManagementToF-SIMSDoped zinc oxideddc:600
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