Search results for "laments"

showing 10 items of 68 documents

Focal adhesions are hotspots for keratin filament precursor formation

2006

Recent studies showed that keratin filament (KF) formation originates primarily from sites close to the actin-rich cell cortex. To further characterize these sites, we performed multicolor fluorescence imaging of living cells and found drastically increased KF assembly in regions of elevated actin turnover, i.e., in lamellipodia. Abundant KF precursors (KFPs) appeared within these areas at the distal tips of actin stress fibers, moving alongside the stress fibers until their integration into the peripheral KF network. The earliest KFPs were detected next to actin-anchoring focal adhesions (FAs) and were only seen after the establishment of FAs in emerging lamellipodia. Tight spatiotemporal …

TalinKeratin 14Intermediate Filamentsmacromolecular substancesBiologyTransfectionKeratin 18Cell LineFocal adhesionMiceReportStress FibersCell cortexMetalloproteinsAnimalsHumansRNA AntisensePseudopodiaCytoskeletonActinResearch ArticlesCell Line TransformedFocal AdhesionsKeratin FilamentKeratin-18Keratin-14Cell BiologyBridged Bicyclo Compounds HeterocyclicActinsZyxinCell biologyProtein TransportThiazolesBiochemistryEpidermolysis Bullosa SimplexMutationKeratinsThiazolidinesMarine ToxinsLamellipodiumPaxillinThe Journal of Cell Biology
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Combining in the melt physical and biological properties of poly(caprolactone) and chlorhexidine to obtain antimicrobial surgical monofilaments.

2012

Bacterial infections on a sutured wound represent a critical problem, and the preparation of suture threads possessing antimicrobial properties is valuable. In this work, poly(caprolactone) (PCL) monofilaments were compounded at the concentration of 1, 2 and 4 % (w/w), respectively, to the antiseptic chlorhexidine diacetate (CHX). The incorporation was carried out in the melt by a single-step methodology, i.e. “online” approach. Mechanical tests revealed that the incorporation of CHX does not significantly change tensile properties of PCL fibres as the thermal profile adopted to prepare the compounded fibres does not compromise the antibacterial activity of CHX. In fact, CHX confers to comp…

Thermoplasticmedicine.drug_classCell SurvivalPolyestersSettore BIO/19 - Microbiologia GeneraleApplied Microbiology and Biotechnologychemistry.chemical_compoundAntisepticTensile StrengthPolymer chemistryUltimate tensile strengthmedicineEscherichia coliHumanschemistry.chemical_classificationpoly(caprolactone)biologyChemistryChlorhexidinechlorhexidineChlorhexidineSuture TechniquesSpectrometry X-Ray EmissionGeneral MedicineFibroblastsbiology.organism_classificationAntimicrobialMicrococcus luteusSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiEquipment and Suppliessurgical monofilamentsAnti-Infective Agents LocalMicroscopy Electron ScanningMicrococcus luteusAntibacterial activityCaprolactoneBiotechnologyNuclear chemistrymedicine.drugBacillus subtilisApplied microbiology and biotechnology
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Reglamento del personal

Tramvies Comunitat Valenciana Reglaments
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Induction of rapid and reversible cytokeratin filament network remodeling by inhibition of tyrosine phosphatases

2002

The cytokeratin filament network is intrinsically dynamic, continuously exchanging subunits over its entire surface, while conferring structural stability on epithelial cells. However, it is not known how cytokeratin filaments are remodeled in situations where the network is temporarily and spatially restricted. Using the tyrosine phosphatase inhibitor orthovanadate we observed rapid and reversible restructuring in living cells, which may provide the basis for such dynamics. By examining cells stably expressing fluorescent cytokeratin chimeras, we found that cytokeratin filaments were broken down and then formed into granular aggregates within a few minutes of orthovanadate addition. After …

Tyrosine 3-MonooxygenaseRecombinant Fusion ProteinsGreen Fluorescent ProteinsIntermediate FilamentsFluorescent Antibody Techniquemacromolecular substancesBiologyCytoplasmic GranulesProtein filamentCytokeratinIntermediate Filament ProteinsKeratinTumor Cells CulturedEnzyme InhibitorsPhosphorylationCytoskeletonIntermediate filamentActinchemistry.chemical_classificationCell BiologyPlectinCell biologyLuminescent ProteinsMicroscopy ElectronEukaryotic Cells14-3-3 ProteinschemistryCytoplasmKeratinsPlectinTyrosineProtein Tyrosine PhosphatasesVanadatesJournal of Cell Science
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Light-induced resistance of the keratin network to the filament-disrupting tyrosine phosphatase inhibitor orthovanadate.

2003

Epidermal keratinocytes respond to low-dose light irradiation by inducing signaling cascades that lead to long-term effects on gene transcription thereby protecting cells against damage. In contrast, little is known about immediate light-induced alterations of structural proteins. We have made the intriguing observation that light produces fundamental changes in the properties of the keratin filament system of cultured epidermoid A-431 cells. A short light exposure (1–10 min) causes the keratin cytoskeleton to become immediately resistant to the tyrosine phosphatase inhibitor orthovanadate, which otherwise disrupts the keratin filament network completely in just a few minutes. This protecti…

Ultraviolet Raysultraviolet lightDrug ResistanceIntermediate FilamentsDermatologyProtein tyrosine phosphatasemacromolecular substancesBiologyBiochemistryProtein filamentKeratinUltraviolet lightTumor Cells CulturedHumansVanadatePhosphorylationIntermediate filamentMolecular Biologychemistry.chemical_classificationintermediate filamentKeratin Filamentintegumentary systemVulvar NeoplasmsvanadateCell BiologyMolecular biologyCell biologychemistryEpidermal CellsPhosphorylationKeratinsFemaleProtein Tyrosine PhosphatasesVanadatescytokeratinThe Journal of investigative dermatology
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Jauniešu līdzdalība lēmumu pieņemšanas procesā parlamentā Latvijā

2016

Maģistra darba Jauniešu līdzdalība lēmumu pieņemšanas procesā parlamentā Latvijā mērķis ir izpētīt jauniešu līdzdalību lēmumu pieņemšanas procesā un to ietekmējošos faktorus parlamentā Latvijā, kā arī izstrādāt priekšlikumus līdzdalības procesa pilnveidošanai. Mērķa sasniegšanai tiek analizēti līdzdalības un demokrātijas jēdzieni, līdzdalības formas, jauniešiem piemītošās prasmes un zināšanas, kā arī jaunākas līdzdalības tendences. Maģistra darbam izvirzīts izpētes jautājums – vai Jauniešu Saeima kā līdzdalības instruments pilnveido jauniešu līdzdalības prasmes un zināšanas, un veicinās viņu līdzdalību lēmumu pieņemšanas procesā? Darba gaitā autore sniedz atbildi uz izpētes jautājumu un izv…

VadībzinātneJauniešu parlamentslīdzdalībalēmumu pieņemšanas processjauniešiparlaments
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Valodas reģistrs parlamentā: sistēmiski funkcionālais skatījums

2014

ANOTĀCIJA Promocijas darbā „Valodas reģistrs parlamentā: sistēmiski funkcionālais skatījums” veikta reģistra jēdziena izpēte sistēmiski funkcionālās valodniecības tradīcijā, to skatot kopsakarā ar latviešu valodnieku atziņām valodas funkcionalitātes izpētē. Analizētas Latvijas Republikas Saeimas debates, atklājot valodas kvantitatīvo mērījumu nozīmi reģistra raksturošanā. Izstrādātais reģistra analīzes modelis aptver valodas morfoloģijas, leksiskās semantikas un sintakses resursus ciešā saistījumā ar to funkcijām saziņas situācijā. Kvantitatīvā analīze atklāj saziņas leksisko kompozīciju, patstāvīgo vārdu un palīgvārdu dinamiku, vārda saknes realizācijas daudzveidību, vārdšķiru lietojumu, s…

Valodas reģistrsparliamentValodniecībaValodu un kultūras studijas dzimtās valodas studijas un valodu programmasdiscourseApplied linguisticsLietišķā valodniecībatextparlaments
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Latvijas Republikas vēlētāju aktivitātes 2019. gada Eiropas Parlamenta vēlēšanās, asociētie faktori

2019

Tēma: Latvijas republikas vēlētāju aktivitātes 2019.gada Eiropas Parlamenta vēlēšanās asociētie faktori. Mērķis: analizēt vēlētāju aktivitātes sociāli demogrāfisko faktoru determinantu un nebalsošanas iemeslu atšķirības. Aktualitāte: 2019. gada EP vēlēšanās Latvijā piedalījušies 474 390 jeb 33,53% balsstiesīgo. Salīdzinot ar 2014. gada EP vēlēšanām, vēlētāju aktivitāte pieaugusi par 3,3%, kad EP vēlēšanās piedalījās 30,24% vēlētāju. Taču salīdzinot ar 2004. un 2009. gada EP vēlēšanām, vēlētāju aktivitāte samazinājās par 7,81% un 20,17%. Līdz ar to, vēlētāju aktivitātes līmenis 2019.gada EP vēlēšanās ir otrais vēsturiski zemākais LR un septītais zemākais ES valstu vidū. Ar vēlēšanu asociēto …

Vēlētāju AktivitāteVēlēšanas2019Eiropas ParlamentsEkonomikaDemokrātija
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Mechanical Behavior of Concrete Columns Confined by Laterally Pre-Tensioned FRP

2011

This paper presents the results of an experimental investigation of concrete columns confined by a wound pre-tensioned carbon filament yarn. Yarn winding equipment was developed in the Institute of Polymer Mechanics with the ability to set the desired pre-tension force and thereby producing confined concrete specimens with different initial lateral pressure. It is shown that initial lateral pressure increases the axial stress at which intense internal cracking of the concrete develops.

chemistry.chemical_classificationCrackingCompressive strengthMaterials sciencechemistryvisual_artvisual_art.visual_art_mediumCylinder stressYarnPolymerFibre-reinforced plasticComposite materialCarbon filaments
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Pyrolysis gas chromatography-mass spectrometry in environmental analysis: Focus on organic matter and microplastic

2020

Pyrolysis gas chromatography-mass spectrometry (Py-GC-MS) has great potential within environmental analysis. This technique is mainly used for the chemical identification of macromolecules that cannot be characterized by either liquid or gas chromatography due to their big size. Through pyrolysis (controlled thermal degradation), these macromolecules are broken down into simpler molecules that can be separated by gas chromatography and detected by mass spectrometry. This technique has been traditionally used in environmental samples for the characterization of organic matter and humic substances, contaminants, lignins, etc. It attains the identification of the different types of chemical un…

chemistry.chemical_classificationMicroplasticsCurie-pointEnvironmental analysisEvolved gas analysisChemistry010401 analytical chemistryMass spectrometry01 natural sciences0104 chemical sciencesAnalytical ChemistryFilamentsPyrolysis–gas chromatography–mass spectrometryEnvironmental chemistryReactive pyrolysisOrganic matterEvolved gas analysisGas chromatographyPyrolysisMicrofurnacesSpectroscopy
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