Search results for "ZIF"

showing 9 items of 59 documents

Modification of face masks with zeolite imidazolate framework-8

2022

The worldwide spread of the SARS-CoV-2 virus has continued to accelerate, putting a considerable burden on public health, safety, and the global economy. Taking into consideration that the main route of virus transmission is via respiratory particles, the face mask represents a simple and efficient barrier between potentially infected and healthy individuals, thus reducing transmissibility per contact by reducing transmission of infected respiratory particles. However, long-term usage of a face mask leads to the accumulation of significant amounts of different pathogens and viruses onto the surface of the mask and can result in dangerous bacterial and viral co-infections. Zeolite imidazolat…

antimikrobiset yhdisteetvirusesSARS-CoV-2-virusCOVID-19COVID-19 pandemicGeneral ChemistryorganometalliyhdisteetCondensed Matter PhysicsMOFszeoliititSDG 3 - Good Health and Well-beingMechanics of Materialskasvosuojaimet/dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_beingGeneral Materials ScienceFace masksZIF-8pinnoitteetAnti-viral/bacterial coatingMicroporous and Mesoporous Materials
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F.A.L.C.A.D.E.: a fuzzy software for the energy and environmental balances of products

2004

Abstract It is generally well known that the reliability of Life Cycle Analysis (LCA) studies depends upon exact, complete and sharp input data that, unfortunately, are not always available. Furthermore, when available, the input data are affected by uncertainty whose importance is not always adequately taken into consideration. This paper describes the software F.A.L.C.A.D.E. (Fuzzy Approach to Life Cycle Analysis and Decision Environment): a tool designed for the calculation of the eco-profile of products, based on a fuzzy logic approach. The originality of the method already treated in other papers is to use the fuzzy representation to manage the complex relationships that arise in compi…

business.industryEcological ModelingLinear modelType-2 fuzzy sets and systemscomputer.software_genreDefuzzificationFuzzy logicSet (abstract data type)SoftwareFuzzy numberFuzzy set operationsData miningbusinessAlgorithmcomputerMathematicsEcological Modelling
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Homogēnu un heterogēnu reakciju modelēšana gazifikācijas procesā

2020

Ik gadu pieaugošais pieprasījums pēc enerģijas, kas saistīts ar pasaules populācijas pieaugšanu un nepārtrauktu industralizāciju, liek meklēt veidus, kā enerģiju iegūt pēc iespējas videi draudzīgākā ceļā. Tiek paredzēts, ka gazifikācija kā enerģijas iegūšanas veids nākotnē kļūs aizvien pieprasītāks, jo kā izejmateriālu iespējams izmantot dažāda veida biomasas, tai skaitā jebkādus organiskos atkritumus, kas ļauj izvairīties no neataunojamo dabas resursu patērēšanas. Lai arī gazifikācija ir jau sen pazīstams enerģijas iegūšanas veids, tā kontrole ir sarežģīta un procesa efektivitāte nav bijusi pietiekama, kas ir kavējis plašāku tās izmantošanu. Lai šo procesu labāk izprastu un optimizētu, pēd…

homogēnas un heterogēnas ķīmiskās reakcijasbiomasasintētiskā gāzeskaitliskā hidrodinamikaGazifikācijaFizika
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Les plaies de la Grande Guerre dans la Berliner Illustrirte Zeitung, un imaginaire de papier sous la République de Weimar

2021

International audience; Auch nach dem Waffenstillstand wird der Erste Weltkrieg in der Berliner Illustrirten Zeitung (BIZ)-einem der ersten illustrierten Massenblätter-weiter thematisiert. Bei der Untersuchung dieses mediatisierten Krieges wird der Frage nachgegangen, was diese Bilderwelt über die fortschrittlichen Erwartungen, Ängste und Hoffnungen in der Weimarer Republik aussagt. Dabei geht hervor, dass die BIZ nach der anfänglichen Bekundung eines gewissen Wohlwollens gegenüber den ehemaligen Feinden zu Beginn des Jahres 1919 bald in einen bitteren Ton umschlägt, als die Friedensbedingungen bekannt gegeben werden. Diese enttäuschten Hoffnungen haben die kulturelle Demobilisierung der BI…

kollektives GedächtnisGrande Guerrepacifismillustrierte Presse16. Peace & justicePazifismus presse illustréeGreat WarErster Weltkrieg[SHS]Humanities and Social SciencesRépublique de WeimarWeimar Republiccollective memorypacifisme illustrated pressmémoire collectiveWeimarer RepublikSYMPOSIUM CULTURE@KULTUR
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Unconventional synthesis and properties of zeolitic imidazolate frameworks and 2D magnetic MOFs

2021

Esta tesis fue planteada para el desarrollo de nuevos polímeros de coordinación y materiales híbridos metalorgánicos (MOFs) basados en rutas sintéticas novedosas en ausencia de disolvente. Esta novedosa metodología de síntesis permite acceder a nuevos materiales inalcanzables por rutas más clásicas como las solvotermales. La tesis se centra en la obtención de materiales basados en Fe(II), el cual es sensible a ser oxidado durante las reacciones de formación de MOFs a Fe(III). Por ello se utilizó una síntesis en ausencia de disolvente en atmosfera inerte compatible con Fe(II). Para ello se utiliza una familia de ligandos sublimables tipo imidazol y metalocenos, como el ferroceno como fuente …

magneticUNESCO::QUÍMICA2d materialssolvent-free:QUÍMICA [UNESCO]mofzifs
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Nonsteroidal Anti-Inflammatory Drugs and Ectodomain Shedding of the Amyloid Precursor Protein

2008

<i>Background:</i> Epidemiological studies have suggested that long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) is associated with a reduced incidence of Alzheimer’s disease (AD). Several mechanisms have been proposed to explain these findings including increased shedding of the soluble ectodomain of the amyloid precursor protein (sAPP), which functions as a neurotrophic and neuroprotective factor in vitroand in vivo. <i>Objective:</i> To clarify whether NSAIDs consistently stimulate sAPP secretion. <i>Methods:</i> 293-EBNA cells with stable overexpression of an APP-alkaline phosphatase fusion protein (APP-AP), SH-SY5Y and PC12 cells or prim…

medicine.medical_specialtyMedizinische Fakultät -ohne weitere Spezifikation-IndomethacinIbuprofenStimulationCHO Cells-PC12 CellsNeuroprotectionCell LineAmyloid beta-Protein PrecursorNeuroblastomaCricetulusWestern blotDownregulation and upregulationCell Line TumorCricetinaeInternal medicinemedicineAmyloid precursor proteinAnimalsddc:610medicine.diagnostic_testbiologyChemistryAnti-Inflammatory Agents Non-SteroidalTransfectionAlkaline PhosphataseRatsKineticsEndocrinologyNeurologyEctodomainCell culturebiology.proteinTetradecanoylphorbol AcetateNeurology (clinical)
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Gazifikācijas modeļa pētijumi

2018

Darbā ir izveidots un analizēts matemātiskais modelis biomasas gazifikācijai ar nelineāru diferenciālvienādojumu sistēmu. Pirmkārt, tiek iegūta parasto diferenciālvienādojumu sistēma. Simulācijas tiek veiktas, izmantojot Runges-Kutas ar 4. kārtas punktu šablonu un iebūvēto funkciju programpaketē MATLAB. Tika izveidots reālistisks modelis ar daļēju parciālo diferenciālvienādojumu. Telpiskā diskretizācija tiek veikta, izmantojot galīgo tilpuma metodi. Izmantojot programmu MATLAB tika veiktas simulācijas vairākiem gazifikācijas procesu scenārijiem. Optimālākam rezultātu novērtējumam papildus apskata un ilustrē piemēru sērkociņu degšanai un to atkarībai no izvēlētajiem parametriem.

nelineāro diferenciālvienādojumu sistēmaRunges-Kutas metodebiomasas gazifikācijagalīgo tilpumu metodeMatemātika
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Returns To Education During And After The Economic Crisis: Evidence From Latvia 2006–2012

2017

We employ EU-SILC micro data for Latvia to study how returns to education changed during the economic crisis of 2008–2009 and afterwards. We found that returns to education increased significantly during the crisis and decreased slightly during the subsequent economic recovery. The counter-cyclical effect was evident in nearly all population groups. After the crisis, education became more associated than before with a longer working week and a higher employment probability. Furthermore, we show that returns to education in Latvia are generally higher in the capital city and its suburbs than outside the capital city region, as well as for citizens of Latvia than for resident non-citizens and…

professional experienceökonomisches ModellLabour economicsSecondary educationEconomicsuniversity level of educationgender-specific factorsMincer coefficientEconomicsWirtschaftskriseLabor Market Research050207 economicsHochschulbildungHB71-74050205 econometrics media_commoneducation.field_of_study05 social sciencesInstrumental variableWirtschaftDifferential (mechanical device)Lettlandreturns to educationGeneral Medicinewage differentials modelreturns to education; Mincer coefficient; wage differentials model; higher education wage premium; instrumental variableswagemincer coefficientEinkommensunterschiedHigher educationLohnmedia_common.quotation_subjectPopulationWageeconomic crisis0502 economics and businessddc:330Messungdifference in incomeeducationBerufserfahrunginstrumental variablesArbeitsmarktforschungbusiness.industryLohnhöheLatviawage levelEconomics as a sciencegeschlechtsspezifische FaktorenEconomic recoveryCapital citymeasurementhigher education wage premiumbusinesseconomic modelComparative Economic Research. Central and Eastern Europe
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Kāda biomasas gazifikācijas modeļa skaitliskā analīze

2017

Šajā darbā tiek pētīts gazifikācijas procesa matemātiskais modelis. Tiek analizēta siltumapmaiņas reakcijas vienādojumu sistēma, konstruēts tās matemātiskais modelis un izpētīti raksti par gazifikācijas norises procesiem.

siltumvadīšanas vienādojumsmatemātiskais modelisdiferenču shēma.Matemātikafinite difference methodsgazifikācija
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