Search results for "note"

showing 10 items of 10709 documents

CoS2/TiO2 Nanocomposites for Hydrogen Production under UV Irradiation

2019

Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen production efficiencies of cobalt disulfide (CoS2)-embedded TiO2 nanocomposites. Materials are synthesized by using a hydrothermal approach and the hydrogen production efficiencies of pristine CoS2, TiO2 nanoparticles and CoS2/TiO2 nanocomposites are compared under UV irradiation. A higher amount of hydrogen production (2.55 mmol g&minus

hydrothermalMaterials scienceHydrogenNanoparticlechemistry.chemical_element02 engineering and technology010402 general chemistry01 natural scienceswater splittingArticleTransition metalGeneral Materials Sciencetitaniatransition metal chalcogenidesHydrogen productionNanocompositeVDP::Teknologi: 500::Materialteknologi: 520::Funksjonelle materialer: 522021001 nanoscience & nanotechnology0104 chemical sciencesVDP::Teknologi: 500Chemical engineeringchemistryhydrogenPhotocatalysisWater splitting0210 nano-technologyCobaltMaterials
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Autovadīšanas manevru noteikšana izmantojot viedtālruni

2015

Automašīnas ir mūsdienu izplatītākais transporta līdzeklis, ar ko ir saistīta gan mūsu ikdiena, gan neskaitāmas uzņēmējdarbības jomas. Diemžēl ir ļoti maz iespēju iegūt informāciju par to, kā automašīnas tiek izmantotas. Viedtālruņi mūsdienās ir ļoti plaši izplatīti un tie ir aprīkoti ar sensoriem, kas var tikt izmantoti šīs problēmas risināšanā. Šajā darbā tiek izpētīta iespēja izmantot autovadītāja viedtālruņa sensoru iegūto informāciju, lai automatizētā veidā noteiktu vadītāja veiktos manevrus autovadīšanas laikā. Darba ietvaros tiek apzināti līdzīgi pētījumi un risinājumi, kā arī apskatīti un analizēti viedtālruņos sastopamie sensori un pārbaudīti šo sensoru mērījumi autovadīšanas laikā…

iOSAutovadīšanaDatorzinātneViedtālrunisManevru noteikšana
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Valsts pārvaldes iekšējo normatīvo aktu piemērošanas tiesiskie aspekti

2018

Bakalaura darba mērķis ir analizēt valsts pārvaldes iekšējo normatīvo aktu piemērošanas svarīgākos tiesiskos aspektus Latvijā. Jautājums literatūrā nav plaši analizēts un gan sabiedrībā kopumā, gan iekšējo normatīvo aktu izstrādātāju un pieņēmēju vidū nav pietiekama izpratne par šo jautājumu, it īpaši par iekšējo normatīvo aktu piemērošanu attiecībā pret privātpersonām. Bakalaura darbā autors pēta normatīvo aktu piemērošanas attīstību, iekšējo normatīvo aktu piemērošanu iestādē, tai skaitā padotā iestādē, iekšējo normatīvo aktu piemērošanu attiecībā pret privātpersonām, kā arī iekšējo normatīvo aktu piemērošanu citās Eiropas Savienības valstīs. Autors arī analizē iekšējo normatīvo aktu piem…

iekšējie normatīvie aktiiekšējais normatīvais aktsiekšējie noteikumiieteikumiinstrukcijaJuridiskā zinātne
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Immuno-MALDI-MS in Human Plasma and on-Chip Biomarker Characterizations at the Femtomole Level

2012

Immuno-SPR-MS is the combination of immuno-sensors in biochip format with mass spectrometry. This association of instrumentation allows the detection and the quantification of proteins of interest by SPR and their molecular characterization by additional MS analysis. However, two major bottlenecks must be overcome for a wide diffusion of the SPR-MS analytical platform: (i) To warrant all the potentialities of MS, an enzymatic digestion step must be developed taking into account the spot formats on the biochip and (ii) the biological relevancy of such an analytical solution requires that biosensing must be performed in complex media. In this study, we developed a procedure for the detection …

immuno MALDI-MSMaldi mseducationlcsh:Chemical technologyProteomicsMass spectrometry01 natural sciencesBiochemistryArticleAnalytical Chemistry[SPI.MAT]Engineering Sciences [physics]/MaterialsAutomation03 medical and health sciencesproteomicsLimit of DetectionLab-On-A-Chip DevicesHumanslcsh:TP1-1185Electrical and Electronic Engineering[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/MicroelectronicsBiochipInstrumentationmass spectrometry030304 developmental biologyDetection limit[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]0303 health sciencesChromatographyChemistry010401 analytical chemistryReproducibility of ResultsSurface Plasmon ResonanceAtomic and Molecular Physics and Optics0104 chemical sciencesBiomarker (cell)Human plasmaSpectrometry Mass Matrix-Assisted Laser Desorption-IonizationSurface Plasmon Resonance; mass spectrometry; immuno MALDI-MS; biomarker; proteomicsbiomarkerBiosensorBiomarkers
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Bone-Healing Pattern on the Surface of Titanium Implants at Cortical and Marrow Compartments in Two Topographic Sites: an Experimental Study in Rabbi…

2018

This study evaluates the bone-healing patterns on the surface of titanium implants at the cortical and marrow compartments of bicortically-installed implants in the diaphysis and metaphysis of rabbit tibiae. In 27 New Zealand rabbits, two implants, one for each macro-design and with equal resorbable blasted media (RBM) implant surfaces, were randomly implanted in the diaphysis or metaphysis of each tibia. The flaps were sutured to allow submerged healing. The animals were sacrificed after two, four, or eight weeks, with nine weeks used for the period of healing. Ground sections were prepared and analyzed. No statistically significant differences were found between the two groups for newly f…

implant macro-designmedicine.medical_treatment02 engineering and technologyBone healingMetaphysislcsh:TechnologyArticleOsseointegration03 medical and health sciences0302 clinical medicinemedicineGeneral Materials ScienceTibiaDental implantlcsh:Microscopylcsh:QC120-168.85dental implantlcsh:QH201-278.5Chemistrylcsh:Tosseointegration030206 dentistryAnatomy021001 nanoscience & nanotechnologyanimal studyDiaphysisAppositionmedicine.anatomical_structurelcsh:TA1-2040bicortical stabilizationlcsh:Descriptive and experimental mechanicsImplantlcsh:Electrical engineering. Electronics. Nuclear engineering0210 nano-technologylcsh:Engineering (General). Civil engineering (General)lcsh:TK1-9971Materials
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Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

2018

Transparent ZnO ceramics are of interest for use as material for high-efficiency fast scintillators. Doping ZnO ceramics in order to improve complex of their properties is a promising direction. In the present research, the role of indium in the ZnO nanopowders surface interactions and in the change of microstructures and photoluminescence (PL) characteristics of sintered cera-mics is considered. Undoped and 0.13 wt% In doped ZnO ceramics are obtained by hot pressing sintering. It has been found that indium leads to the transition of initially faceted ZnO particles to rounded, contributing to good sintering with formation of diffusion active grain boundaries (GBs). Unlike ZnO ceramics, ZnO:…

in doped zno ceramicsPhotoluminescenceMorphology (linguistics)hot pressing sinteringZnO powdersQC1-999General Physics and Astronomy02 engineering and technologyScintillator010402 general chemistry01 natural sciences:NATURAL SCIENCES:Physics [Research Subject Categories]CeramicComposite materialIn doped ZnO ceramicsPhysicsDopingGeneral Engineeringgrain boundaries021001 nanoscience & nanotechnologyMicrostructure0104 chemical sciencesvisual_artvisual_art.visual_art_mediumGrain boundaryphotoluminescence0210 nano-technologyzno powdersLatvian Journal of Physics and Technical Sciences
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Lakstaugu sugu izmantošana Latvijas dabisko zālāju biotopu aizsardzības stāvokļa novērtēšanā

2019

Dabisko zālāju platības Latvijā sarūk un pasliktinās to kvalitāte. LAP ir rīks ar kura palīdzību nodrošināt to uzturēšanu un atjaunošanu, būtu jāpārskata atbalsta nosacījumi un jāapsver rezultātorientētu pasākumu ieviešana maksājot par indikatorsugu skaitu zālājā. Maģistra darba mērķis ir noskaidrot Centrālvidzemes ģeobotāniskā rajona biežāk sastopamo dabisko zālāju lakstaugu indikatorsugu indikatīvo vērtību biotopa aizsardzības stāvokļa novērtēšanai kā arī zālāju indikatorsugu sastopamību noteicošos faktorus. Sniegts neliels ieskaits biotopa aizsardzības stāvokļa novērtēšanā, tajā skaitā ar indikatorsugu palīdzību. Pieejamajiem veģetācijas aprakstiem novērtēta datu kvalitāte. Darbā analizē…

indikatorsugasVides zinātnedabiskie zālājizālāja aizsardzības stāvoklissugu sastopamību noteicošie faktori
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Novel Porous Carbon Material for the Detection of Traces of Volatile Organic Compounds in Indoor Air

2021

International audience; A highly sensitive and selective silicon-based microanalytical prototype was used to identify a few ppb of volatile organic compounds (VOCs) in indoor air. Herein, a new nonactivated tannin-derived carbon synthesized by an environmentally friendly method, DM2C, a MIL-101(Cr) MOF, and a DaY zeolite were selected for the preconcentration of BTEX compounds (i.e., benzene, toluene, ethylbenzene, and xylenes). Integrating a small amount of these nanoporous solids inside a miniaturized preconcentration unit led to excellent preconcentration performance. By taking advantage of the high adsorption−desorption capacities of the DM2C adsorbent, concentrations as low as 23.5, 30…

indoor air monitoringMaterials scienceInorganic chemistrychemistry.chemical_element02 engineering and technologyBTEX010501 environmental sciences[CHIM.INOR]Chemical Sciences/Inorganic chemistry01 natural sciencesEthylbenzene[SPI.MAT]Engineering Sciences [physics]/Materialschemistry.chemical_compound[SPI]Engineering Sciences [physics]AdsorptionGeneral Materials ScienceRelative humidity[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/MicroelectronicszeoliteBenzene0105 earth and related environmental sciencesMOF[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]Nanoporousmicroporous materialspreconcentrator[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnologyToluenehydrophobic carbonchemistry[SDE]Environmental Sciences0210 nano-technologyCarbonminiaturized gas chromatographBTEX
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Indos poterminowy na wekslu własnym

2020

indows poterminowyassignmentprzelewpromissory notedue date of the promissory notetermin płatności wekslalate endorsementwekselRejent
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More than a Confinement: “Soft” and “Hard” Enzyme Entrapment Modulates Biological Catalyst Function

2019

Catalysis makes chemical and biochemical reactions kinetically accessible. From a technological point of view, organic, inorganic, and biochemical catalysis is relevant for several applications, from industrial synthesis to biomedical, material, and food sciences. A heterogeneous catalyst, i.e., a catalyst confined in a different phase with respect to the reagents’ phase, requires either its physical confinement in an immobilization matrix or its physical adsorption on a surface. In this review, we will focus on the immobilization of biological catalysts, i.e., enzymes, by comparing hard and soft immobilization matrices and their effect on the modulation of the catalysts’ function. Indeed, …

inorganic chemicals02 engineering and technology010402 general chemistryHeterogeneous catalysisbiosensor01 natural sciencesCatalysischemistry.chemical_compoundbioreactorAdsorptionBioreactorMoleculePhysical and Theoretical ChemistrytrehalosecatalysisSilica gelsilica gel021001 nanoscience & nanotechnology0104 chemical sciencesenzymeChemical engineeringchemistryReagentencapsulation0210 nano-technologyBiosensor
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