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showing 10 items of 408 documents

Mālu modificēšana un inovatīvo produktu raksturojums perspektīvai izmantošanai vides tehnoloģijās

2016

Maģistra darba ietvaros tika pētītas iespējas izstrādāt inovatīvus sorbentus uz mālu minerālu bāzes p-nitrofenola sorbcijai, izmantojot mālu modifikāciju ar virsmas aktīvām vielām un silīcijorganiskiem savienojumiem. Latvijas dabiskie mālieži un rūpnieciski ražotais montmorilonīts tika izvēlēti, lai izvērtētu un salīdzinātu modifikācijas efektivitāti p-nitrofenola sorbcijai. Iegūtie mālu modifikācijas produkti tika raksturoti, izmantojot fizikāli ķīmiskās īpašības raksturojošas analītiskās metodes: Furjē transformācijas infrasarkanā starojuma spektroskopiju (FTIS), skenējošo elektronmikroskopiju (SEM), rentgenstaru difraktometriju (XRD) un Braunera-Emmeta-Tellera (BET) īpatnējās virsmas lau…

Vides zinātneorganisko vielu interkalācijasorbcijap-nitrofenolsmāla sorbenti
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Māla fizikālās un ķīmiskās īpašības un perspektīvas izmantošanas iespējas vides atveseļošanā Latvijā

2015

Māli ir Zemes garozā izplatītākie nogulumieži, kas tos padara par iespējami lētu un plaši pieejamu izejvielu izmantošanai dažādās tautsaimniecības nozarēs. Tā kā tiem piemīt labas sorbcijas un jonu apmaiņas īpašības, tos var pielietot kā materiālu vides atveseļošanas tehnoloģijās. Darbā, izmantojot modernas analītiskās metodes, ir pētīti Latvijā retāk sastopamo juras un triasa sistēmu māli dabiskā un modificētā ar hidroksilapatītu un dzelzs hidroksīdu veidā, lai izzinātu perspektīvas to izmantošanai sorbentu ražošanā. Tika noteikts fizikāli ķīmisko īpašību komplekss, un veikti arsēna savienojumu un metilēnzilā sorbcijas testi. Pētītie Latvijas māli, kas modificēti ar dzelzs hidroksīdu, uzrā…

Vides zinātnetriasa mālsarsēna (As) sorbcijajuras mālsdzelzs hidroksīdshidroksilapatīts
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Signal sequences modulate the immunogenic performance of human hepatitis C virus E2 gene

2005

Abstract Envelope protein E2 of human hepatitis C virus (HCV) is an attractive component of a prototype HCV vaccine. Delivered by DNA immunogens, E2 evokes specific immune response of Th1-type, failing to induce either considerable antibody production, or T-helper cell proliferation. We aimed at modulating the immunogenic performance of E2 gene by changing the mode of protein expression in eukaryotic cells. Plasmids were constructed encoding full-length E2 and nonstructural protein 1 (p7) fused to either 13 or 38 C-terminal amino acids (aa) of HCV E1 that contain second hydrophobic segment of E1 stop-transfer signal, or a complete E1 stop-transfer signal with duplicated second hydrophobic s…

Viral Hepatitis VaccinesSignal peptideGenes ViralMolecular Sequence DataImmunologyHeterologousHepacivirusProtein Sorting SignalsBiologyInjections IntramuscularEpitopeMiceViral ProteinsPlasmidViral Envelope ProteinsChlorocebus aethiopsEscherichia coliAnimalsHumansAmino Acid SequenceMolecular BiologyGeneCellular localizationCell Line TransformedMice Inbred BALB CImmunogenicityGenetic VariationCell Transformation ViralMolecular biologyCOS Cellsbiology.proteinAntibodyHeLa CellsPlasmidsMolecular Immunology
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Una tentación difícil de resistir: Modulaciones de las representaciones religiosas a mediados del siglo XIX en Buenos Aires

2022

Después de siglos de dominación colonial y una marcada proliferación de imágenes religiosas en territorio rioplatense, los aires renovadores de las revoluciones independentistas de los inicios del siglo XIX buscaron configurar un bagaje simbólico que sustente aquellas nuevas conquistas. Sin embargo, las reminiscencias del universo religioso, que se desprenden en numerosas imágenes, símbolos y fórmulas, no dejaron de tener marcada presencia en las representaciones que circulaban en la sociedad posrevolucionaria, al punto de utilizarse, incluso, para proponer juicios y observaciones sobre cuestiones sociales y políticas, muy distantes de su contexto de origen. El presente ensayo pretende inda…

Visual Arts and Performing Artsjoaquín sorollaarqueología clásica.coleccionismo de antigüedades“UNESCO:HISTORIA”cerámica griegaArs Longa. Cuadernos de arte
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Influence of soil surface sealing and hydrophobicity on water infiltration

Nella tesi viene affrontato lo studio dell’impatto dei fenomeni di sealing superficiale e di idrofobicità sui processi di infiltrazione dell’acqua nel suolo. A tal fine vengono utilizzati diversi tipi di esperimenti infiltrometrici che consentono di determinare le modificazioni delle proprietà idrauliche del suolo indotte da questi due fenomeni permettendo di valutare così le loro ripercussioni negative sui processi idrologici. The thesis aims at investigating the effects of soil sealing and hydrophobicity on the water infiltration process. Different field infiltrometric techniques are applied at this end due to their ability to characterize modifications of soil hydraulic properties that d…

WDPTHydraulic conductivityHydrophobicityMEDRepellency indexSoil water repellencyCrustInfiltrometer techniqueWater infiltrationSurface sealing; Crust; Hydrophobicity; Soil water repellency; Water infiltration; Infiltrometer techniques; BEST; Minidisk infiltrometer; Hydraulic conductivity; Sorptivity; WDPT; MED; Repellency index; LeachingMinidisk infiltrometerLeachingSorptivitySettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliSurface sealingBEST
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Application of minidisk infiltrometer to estimate soil water repellency

2016

Soil water repellency (SWR) reduces affinity of soils to water resulting in detrimental implication for plants growth as well as for hydrological processes. During the last decades, it has become clear that SWR is much more widespread than formerly thought, having been reported for a wide variety of soils, land uses and climatic conditions. The repellency index (RI), based on soil-water to soil-ethanol sorptivity ratio, was proposed to characterize subcritical SWR that is the situation where a low degree of repellency impedes infiltration but does not prevent it. The minidisk infiltrometer allows adequate field assessment of RI inherently scaled to account for soil physical properties other…

Water sorptivity1D infiltration equationrepellency index (RI)soil water repellency3D infiltration equationSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestalihockeystick-like shapeminidisk infiltrometer; soil water repellency; repellency index (RI); Water sorptivity; ethanol sorptivity; 1D infiltration equation; 3D infiltration equation; hockeystick-like shape;ethanol sorptivityminidisk infiltrometer
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Characterization of the aromatic potential of grape berry

2022

IntroductionProbe is a research infrastructure gathering 4 analytical platforms of INRAE and allowing multi-approach and multi-complementarity to be explored and exploited. As a proof of concept, a common study was conducted around the structure and the evolution of the skin of the grape berry and the diffusion of compounds of interest during the winemaking process.Materials and methodsIn this context, the aromatic potential on two Vitis vinifera grape varieties (Carignan and Grenache,) were studied. Berries were harvested at an average potential alcohol of 12% vol. in the vineyard of the Pech Rouge experimental unit (INRAE, Gruissan, France) and separated according to their natural heterog…

[SDV.AEN] Life Sciences [q-bio]/Food and Nutrition[CHIM] Chemical SciencesGC-MSstir-bar sorptive extractiongrape berry
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Sensibilité des rendements agricoles potentiels aux paramètres climatiques et environnementaux dans la région du mont Kenya en Afrique de l’Est.

2013

7 pages; International audience; Comprendre les interactions existantes entre le climat et les rendements céréaliers est un objectif important pour l'actuelleproduction agricole et la sécurité alimentaire future des populations résidant dans des régions à agriculture pluviale. Lesrendements potentiels de sorgho simulés par le modèle SARRAH montrent une sensibilité aux paramètres climatiques etenvironnementaux le long des pentes orientales du Mont Kenya. Si le cumul et la durée de saison expliquent une part importante dela variabilité des rendements, d’autres variables comme l’intensité quotidienne, les Tmax ou encore le rayonnement global jouentun rôle non négligeable. La date de semis modu…

[SDV.SA.AGRO] Life Sciences [q-bio]/Agricultural sciences/Agronomymodèle SARRAH[SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology[ SDV.SA.AGRO ] Life Sciences [q-bio]/Agricultural sciences/AgronomyMont Kenyavariables cl imatiquesrendement sorgho[ SDU.STU.CL ] Sciences of the Universe [physics]/Earth Sciences/Climatologyanalyse sensibilité
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L'interdiction de sortie du territoire dans la loi renforçant les dispositions relatives à la lutte contre le terrorisme

2014

International audience; (Publié dans le dossier Les nouvelles dispositions de lutte contre le terrorisme)

[SHS.DROIT]Humanities and Social Sciences/LawEvolutions législatives[SHS.DROIT] Humanities and Social Sciences/LawTERRORISMERéformeInterdiction de sortie du territoireLutte contre le terrorisme
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La crise requin à La Réunion - L'innovation stratégique comme possible levier de sortie de crise: Cas CCMP G2069

2022

Disponible en libre accès; Le cas propose aux apprenants de mobiliser les notions de stratégie avancée (océan bleu, stratégie de rupture) pour les appliquer au cas particulier de l'offre touristique de l'île de la Réunion, dans le contexte d'un exercice de management et de sortie de crise. Quelles sorties de crise est-il possible de proposer ? La réunion doit-elle « coller » au modèle « gagnant » de l’ile Maurice ou des autres îles Vanille ? Suffit-il d’améliorer l’offre de valeur existante pour redresser la situation ? Faut-il au contraire « renverser la table » et renouveler l’offre de valeur de manière radicale et disruptive ?

[SHS.GESTION]Humanities and Social Sciences/Business administrationExercice pédagogiqueEtude de cas[SHS.GESTION] Humanities and Social Sciences/Business administrationStratégie de sortie de crise
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