Search results for " migration"

showing 10 items of 754 documents

Migration of Leukocytes into Filters Coated Homogeneously with Immune Complexes, Antigens, Lectins or Tripeptides

1980

Cellulose nitrate filters were incubated in solutions of albumin, a chemotactically active tripeptide (f-Met-Leu-Phe), immune complexes or lectins and afterwards washed with buffer. They showed a dose-dependent increased leukocyte migration, when tested in typical Boyden chambers in comparison to filters treated only with buffer. The tripeptide, the immune complexes and the lectins were stimulatory at very low concentrations and acted inhibitory at high concentrations. Treating filters with formaldehyde or glutardialdehyde had no clear stimulatory effect. These findings extend earlier observations obtained with casein. They show that cells move very effectively on solid substrata in the abs…

Antigen-Antibody ComplexLeukocyte migrationGuinea PigsImmunologySerum albuminAntigen-Antibody ComplexTripeptideAntigenCell MovementLectinsCaseinConcanavalin AAnimalsImmunology and AllergyPhytohemagglutininsSerum AlbuminOligopeptideChemotactic FactorsbiologyChemistryMicropore FiltersHematologyChemotaxis LeukocyteBiochemistryConcanavalin AImmunoglobulin Gbiology.proteinOligopeptidesGranulocytesImmunobiology
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Embryonic neural cell adhesion molecules on human natural killer cells

1989

The neural cell adhesion molecules (NCAM) are surface glycoproteins that were first described in brain tissue. NCAM mediate adhesion in a variety of cell-cell interactions. In the present study we show that the so-called "embryonic" NCAM, i.e., the highly polysialylated forms of these proteins, are expressed on natural killer cells and some CD3+ cells in man. Homotypic binding of NCAM, believed to be of importance for cell-cell adhesion in neural tissues, appears not to be essential for NK cell-mediated killing. Yet, NCAM might be involved in NK cell migration, homing or related functions.

Antigens Differentiation T-LymphocyteCD3 ComplexCell Adhesion Molecules NeuronalT-LymphocytesCD3Blotting WesternImmunologyReceptors Antigen T-CellChromatography AffinityNatural killer cellCell–cell interactionmedicineHumansImmunology and AllergybiologyCell adhesion moleculeAntibodies MonoclonalCell migrationFlow CytometryPrecipitin TestsMolecular biologyEmbryonic stem cellCell biologyKiller Cells Naturalmedicine.anatomical_structurenervous systembiology.proteinNeural cell adhesion moleculeHoming (hematopoietic)European Journal of Immunology
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An In Vitro Phantom Study on the Role of the Bird-Beak Configuration in Endograft Infolding in the Aortic Arch.

2015

Purpose: To assess endograft infolding for excessive bird-beak configurations in the aortic arch in relation to hemodynamic variables by quantifying device displacement and rotation of oversized stent-grafts deployed in a phantom model. Methods: A patient-specific, compliant, phantom pulsatile flow model was reconstructed from a patient who presented with collapse of a Gore TAG thoracic endoprosthesis. Device infolding was measured under different flow and pressure conditions for 3 protrusion extensions (13, 19, and 24 mm) of the bird-beak configuration resulting from 2 TAG endografts with oversizing of 11% and 45%, respectively. Results: The bird-beak configuration with the greatest protr…

Aortic archModels AnatomicRadiology Nuclear Medicine and ImagingTime FactorsFlow modelPulsatile flowEndograftStent-graft oversizingAorta Thoracic030204 cardiovascular system & hematologyRotation0302 clinical medicineForeign-Body MigrationStentThoracic aortaBird-beak configurationmedicine.diagnostic_testEndovascular ProceduresGraft Occlusion VascularModels CardiovascularAnatomyIn vitro experimentProsthesis FailureBlood Vessel ProsthesiTreatment OutcomePulsatile FlowPatient-specific modelStentsCardiology and Cardiovascular MedicineHumanAortographyTime FactorThoracic endovascular aortic repairProsthesis DesignAortographyImaging phantom03 medical and health sciencesBlood Vessel Prosthesis ImplantationBlood vessel prosthesismedicine.arterymedicineHumansDisplacement (orthopedic surgery)HemodynamicEndovascular Procedurebusiness.industryHemodynamicsDisplacementStent-graft infoldingBlood Vessel ProsthesisSurgerybusinessTomography X-Ray Computed030217 neurology & neurosurgeryStent-graft collapseJournal of endovascular therapy : an official journal of the International Society of Endovascular Specialists
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Climate change and the ecology and evolution of Arctic vertebrates.

2012

25 pages; International audience; Climate change is taking place more rapidly and severely in the Arctic than anywhere on the globe, exposing Arctic vertebrates to a host of impacts. Changes in the cryosphere dominate the physical changes that already affect these animals, but increasing air temperatures, changes in precipitation, and ocean acidification will also affect Arctic ecosystems in the future. Adaptation via natural selection is problematic in such a rapidly changing environment. Adjustment via phenotypic plasticity is therefore likely to dominate Arctic vertebrate responses in the short term, and many such adjustments have already been documented. Changes in phenology and range w…

Aquatic OrganismstundralemmingsClimate Change[SDE.MCG]Environmental Sciences/Global ChangesPopulation Dynamicsshorebirdsparasitesrange shiftsHost-Parasite Interactionsmismatches[ SDV.EE.BIO ] Life Sciences [q-bio]/Ecology environment/Bioclimatologyphenological changesAnimalsIce Coverthreatskin and connective tissue diseasesimpactsmarine mammalsEcosystemtrophic interactions[ SDE.BE ] Environmental Sciences/Biodiversity and Ecologypolar bearArctic RegionsEndangered SpeciesBiological Evolutionsea icelarge herbivores[ SDE.MCG ] Environmental Sciences/Global ChangesplasticityrodentsVertebratesAnimal Migrationgeesesense organsadaptations[SDE.BE]Environmental Sciences/Biodiversity and Ecology[SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatologygeographic locationsseabirds
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THE MEDITERRANEAN AS A PLACE OF WELCOME. THE EXPERIENCE OF LAMPEDUSA

2019

Lo scritto descrive l'esperienza di ricerca e insegnamento dei Laboratori di progettazione architettonica del terzo anno che aveva come obiettivo la conoscenza di luoghi di grande valore paesaggistico e architettura colpiti da fenomeni migratori come il caso di Lampedusa, porta di accesso all'Europa, principale corridoio di immigrazione . L'isola, al centro del Mediterraneo, è oggi un luogo di flussi migratori, di uomini in fuga dalla guerra, alla ricerca di nuove forme di condivisione. Il Laboratorio, infatti attraverso i numerosi progetti educativi intende dare una risposta attraverso l'architettura per i luoghi dell'isola, che possono consentire nuove forme di convivenza dell'essere nel …

Architecture migration contemporary citySettore ICAR/14 - Composizione Architettonica E Urbana
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Progettare le migrazioni

2019

Il lavoro è una riflessione sul tema delle migrazioni, un argomento che coinvolge il Mediterraneo, luogo di molte civiltà, intrecciate, accatastate l'una sull'altra, come scrive F. Braudel. Il tema ha interessato tutto il Mediterraneo a causa dei continui movimenti di popoli provenienti dai paesi del Nord Africa e dal Medio Oriente verso le coste siciliane, che sono stati colpiti da vecchi e nuovi sbarchi. La Sicilia, con Lampedusa in prima linea, è sempre stata un luogo di arrivo per le rotte dei migranti, anche se la maggior parte di loro vuole raggiungere le città del nord Europa. Come vedremo, il tema delle migrazioni interesserà l'intera Europa, che oggi deve dare una risposta a questo…

Architecture migration contemporary citySettore ICAR/14 - Composizione Architettonica E Urbana
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Abitare i luoghi dell'integrazione

Il tema che la ricerca in questione indaga, riguarda l’abitare posto in relazione agli imponenti flussi migratori che si susseguono nelle città e che, configurano nuove pratiche sociali e urbane. La storia ci mostra come, da sempre, lo spostamento dei popoli abbia determinato sviluppi sia dal punto di vista demografico, storico, culturale, economico all’interno dei paesi ma, allo stesso tempo, ha modificato lo spazio urbano, in quanto portatori di culture tradotti in forme. Si pensi infatti, alle tante testimonianze, ancora presenti nelle città, in cui sono evidenti le diverse influenze (dal popolo greco, romano, arabo, ebreo, etc) che si pongono come valore di memoria e continuità. Rispett…

Architettura Città contemporanea Mediterraneo MigrazioniSettore ICAR/14 - Composizione Architettonica E UrbanaArchitecture Contemporary City Mediterranean Migrations
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Storie di uomini, racconti di spazio

2019

Ancora oggi si susseguono notizie di uomini che strenuamente attraversano il Mediterraneo, di naufragi disperati che si susseguono con cadenza inesorabile, come in un appuntamento macabro con la morte, come in una triste litania funebre che si snoda sotto lo sguardo attonito dell’Occidente. Intanto un nuovo mondo sta silenziosamente nascendo, configurando con apparente disordine un nuovo assetto geopolitico, tra l’esaltazione nazionalistica di muri che riaffermano l’invalicabilità dei confini e un’accoglienza diffusa che invece ne invoca la disintegrazione mostrando la forza inarrestabile e pervicace della solidarietà tra gli uomini, una residua speranza nel futuro. Una sorta di ricomposizi…

Architetture Space MigrationSettore ICAR/14 - Composizione Architettonica E UrbanaArchitettura Spazio Migrazioni
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Spazio artistico ed espressione di libertà: volti spazi e creatività nell'opera di Filippo Bentivegna

2018

In this essay the author investigates the life and the work of F. Bentivegna, a sicilian migrants who had the power to translate the failure of a dream in an artistic expression form, thus becoming one of the exponents of the european Art Brut's artistic movement.

Art brut sculpture migration South of Italy primitive sculpture madness stone heads Bentivegna Filippo Bentivegna Sciacca Sicily Italian migration italian migration to USA metabolismo culturale.Settore L-ART/03 - Storia Dell'Arte Contemporanea
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Human capital and life satisfaction among circular migrants: an analysis of extended mobility in Europe

2019

This article extends understandings of circular migration among young migrants (aged 16–35) by focusing on the two key concepts of human capital and life satisfaction. Drawing on a large-scale quan...

Arts and Humanities (miscellaneous)Circular migration05 social sciences050602 political science & public administration0507 social and economic geographyKey (cryptography)Life satisfactionDemographic economicsSociology050703 geographyHuman capital0506 political scienceDemographyJournal of Ethnic and Migration Studies
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