Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title
Now showing items 882-901 of 1025
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Synthesis and luminescent properties of Mn-doped alpha-tricalcium phosphate
(Elsevier, 2021)In this work, a series of Mn2+-doped α-tricalcium phosphate (α-TCP) powders was synthesized by wet co-precipitation method followed by high-temperature annealing and thermal quenching. It was shown that Mn2+-doped α-TCP ... -
Synthesis and studying of reduced few-layered graphene coatings in gas sensor applications
(Institute of Physics Publishing, 2019)In this work reduced few-layered graphene (rFLG) nanoparticles were synthesized using electrochemical pulse exfoliation method from waste graphite crucibles. The regular change in voltage polarity in the synthesis process ... -
Synthesis and vibration spectroscopy of nano-sized manganese oxides
(Polish Academy of Sciences, 2018)X-ray diffraction, micro-Raman and the Fourier transform infrared spectroscopies as well as magnetometry measurements were performed on nanosized manganese oxides to probe their phase composition and magnetic properties. ... -
Synthesis of Eu2+ and Dy3+ doped strontium aluminates and their properties
(Trans Tech Publications Ltd., 2017)Strontium aluminate phosphors were synthesized by the solution combustion method using citric acid, urea or glycine as reducing agent and europium and dysprosium as dopants. The content of both dopants was in the range of ... -
Synthesis of NaYF4:Yb3+, Tm3+ Nanocrystals Via the Thermal Decomposition Method Using Refined Sunflower Oil
(Sciendo, 2023)In recent years, up-conversion luminescence nanoparticles have attracted significant attention from researchers in fields such as analytical chemistry (for example qualitative and quantitative analysis of metal and non-metal ... -
Synthesis of porous indium phosphide with nickel oxide crystallites on the surface
(International Association of Physical Chemists, 2022)In this paper, the technology of synthesis of crystallites and nanocrystallites of nickel oxide on the surface of indium phosphide is described. This technology consists of two stages. In the first stage, porous indium ... -
Synthesis, magnetoresistance, and thermoelectrical properties of environmentally stable n-type nitrogen-doped multiwalled carbon nanotubes
(Elsevier, 2023)Nitrogen-doped multiwalled carbon nanotubes (N-MWCNTs) are known as a perspective material for a variety of applications in nanoelectronic devices, sensors, catalysts for carbon dioxide reduction, and flexible thermoelectrics. ... -
Synthesis, structural and luminescent properties of Mn-doped calcium pyrophosphate (Ca2P2O7) polymorphs
(Nature Research, 2022)In the present work, three different Mn2+-doped calcium pyrophosphate (CPP, Ca2P2O7) polymorphs were synthesized by wet co-precipitation method followed by annealing at different temperatures. The crystal structure and ... -
Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles
(Elsevier B.V., 2018)In this work, we focused on the syntheses, structure and spectroscopic properties of GdVO4:Dy3+ and DyVO4 (nano)particles of different sizes and shapes (spherical nanoparticles of 2 nm, 4 nm, and 20 nm in size, nanorods ... -
A systematic review of SQL-on-Hadoop by using compact data formats
(2016-10-30)There are huge volumes of raw data generated every day. The question is how to store these data in order to provide faster data access. The research direction in Big Data projects using Hadoop Technology, MapReduce kind ... -
Systematic trends in (0 0 1) surface ab initio calculations of ABO3 perovskites
(Elsevier B.V., 2018)By means of the hybrid exchange–correlation functionals, as it is implemented in the CRYSTAL computer code, ab initio calculations for main ABO3 perovskite (0 0 1) surfaces, namely SrTiO3, BaTiO3, PbTiO3, CaTiO3, SrZrO3, ... -
Systematic Trends in Hybrid-DFT Computations of BaTiO3/SrTiO3, PbTiO3/SrTiO3 and PbZrO3/SrZrO3 (001) Hetero Structures
(MDPI, 2022)We performed predictive hybrid-DFT computations for PbTiO3, BaTiO3, SrTiO3, PbZrO3 and SrZrO3 (001) surfaces, as well as their BaTiO3/SrTiO3, PbTiO3/SrTiO3 and PbZrO3/SrZrO3 (001) heterostructures. According to our hybrid-DFT ... -
Systematic trends in YAlO3, SrTiO3, BaTiO3, BaZrO3 (001) and (111) surface ab initio calculations
(World Scientific Publishing, 2019)The paper presents and discusses the results of performed calculations for YAlO3 (111) surfaces using a hybrid B3LYP description of exchange and correlation. Calculation results for SrTiO3, BaTiO3 and BaZrO3 (111) as well ... -
Taisnes nogriežņu telpiskas tīklveida konfigurācijas algoritmiska atpazīšana no stereopāra
(2017-10-03)Mācību rakstura mēģinājums telpiski atpazīt specifiskus stereopārus, kurus veido telpisku ģeometrisku grafu divas plakanas projekcijas. Aplūkoto ģeometrisko grafu šķautnes ir taisnes nogriežņi, bet virsotnes šo nogriežņu ... -
Target transportation of auxin on mesoporous Au/SiO2 nanoparticles as a method for somaclonal variation increasing in flax (L. usitatissimum L.)
(Hindawi Limited, 2017)Development of methods for direct delivery of different bioactive substances into the cell is a promising and intensively approached area of research. It has become a subject of serious research for multidisciplinary team ... -
Tauta uz skatuves: etnogrāfiskie šovi Latvijā 19. gs. otrajā pusē – 20. gs. sākumā
(Latvijas Universitātes Latvijas vēstures institūts, 2020)Tēžu publikācija referātam “Tauta uz skatuves: etnogrāfiskie šovi Latvijā 19. gs. otrajā pusē – 20. gs. sākumā”, kas 2020. gada 13. novembrī nolasīts Liepājas Universitātes organizētajā starptautiskajā konferencē “Sabiedrība ... -
Technologies of the Stone Age: the Coastal Dimension: Programme and Abstracts PrehCOAST Network Workshop, Riga, Latvia, 6-8 June 2023, Institute of Latvian History, University of Latvia
(Institute of Latvian History, University of Latvia., 2023-06-01)This volume contains the programme and presentation abstracts of the international workshop “Technologies of the Stone Age: The Coastal Dimension”, held on 6–8 June 2023 at the Institute of Latvian History, University of ... -
Temperature and E-Poling Evolution of Structural, Vibrational, Dielectric, and Ferroelectric Properties of Ba1−xSrxTiO3 Ceramics (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.45)
(MDPI, 2023)Lead-free Ba1−xSrxTiO3 (BST) (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.45) ceramics were successfully prepared via the solid-state reaction route. A pure perovskite crystalline structure was identified for all compositions by X-ray ... -
Tendencies in abo3 perovskite and srf2, baf2 and caf2 bulk and surface f‐center ab initio computations at high symmetry cubic structure
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)We computed the atomic shift sizes of the closest adjacent atoms adjoining the (001) surface F‐center at ABO3 perovskites. They are significantly larger than the atomic shift sizes of the closest adjacent atoms adjoining ... -
Testing 4-critical plane and projective plane multiwheels using Mathematica
(2015-10-27)In this article we explore 4-critical graphs using Mathematica. We generate graph patterns according [1, D. Zeps. On building 4-critical plane and projective plane multiwheels from odd wheels, arXiv:1202.4862v1]. Using ...