Search results for "ROMA"

showing 10 items of 13919 documents

La caduta dell'impero d'Occidente (455-476 d.C.)

2008

Le vicende degli anni 455-476, dalla morte di Valentiniano III alla caduta della pars Occidentis dell’impero, mostrano l’indebolirsi della figura imperiale e l’emergere del potere di Ricimero, magister militum barbarico, figura centrale di Kaisermacher che domina lo scenario politico del periodo.

476 d.C.RicimerostoriografiaTarda AntichitàSettore L-ANT/03 - Storia Romanabarbari
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Fabricación de fibras de cristal fotónico y grabación de redes de Bragg

2010

Los trabajos y experimentos desarrollados en esta tesis han ido dirigidos fundamentalmente a la fabricación de fibras de cristal fotónico y a la grabación de redes de Bragg en éstas. Este proyecto se ha desarrollado en dos partes. La primera parte consiste en conocer las características y propiedades de las redes de Bragg grabadas en fibras ópticas. Describe cuáles son las técnicas empleadas para la fabricación de redes de Bragg y explica el método utilizado en la grabación de redes en este trabajo, enfatizando la técnica de apodización de redes de Bragg que se implementó como mejora en el sistema de grabación previamente existente. Se describen algunas de las aplicaciones desarrolladas en …

537Facultat de FísiquesElectricitat. Magnetisme. Electromagnetisme
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Formation of 3-methyl-1,2,3-butanetricarboxylic acid via gas phase oxidation of pinonic acid – a mass spectrometric study of SOA aging

2012

Abstract. This paper presents the results of mass spectrometric investigations of the OH-initiated oxidative aging of α-pinene SOA under simulated tropospheric conditions at the large aerosol chamber facility AIDA, Karlsruhe Institute of Technology. In particular, the OH-initiated oxidation of pure pinic and pinonic acid, two well-known oxidation products of α-pinene, was investigated. Two complementary analytical techniques were used, on-line atmospheric pressure chemical ionization/mass spectrometry (APCI/MS) and filter sampling followed by liquid chromatography/mass spectrometry (LC/ESI-MS). The results show that 3-methyl-1,2,3-butanetricarboxylic acid (MBTCA), a very low volatile α-pine…

540 Chemistry and allied sciencesAtmospheric ScienceChromatographyChemistryAtmospheric-pressure chemical ionizationFraction (chemistry)Mass spectrometryMass spectrometriclcsh:QC1-999JGas phaseAerosollcsh:ChemistryAcid oxidationlcsh:QD1-999540 ChemieYield (chemistry)ddc:550lcsh:PhysicsAtmospheric Chemistry and Physics
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FRA COSTANTINO E I VANDALI. Atti del Convegno Internazionale di Studi per Enzo Aiello (1957-2013), Messina, 29-30 Ottobre 2014, L. De Salvo, E. Calir…

2016

This book brings together the papers presented at the Conference held in Messina at the Department of Ancient and Modern Civilisations on 29 and 30 October 2014 in memory of Vincenzo Aiello. On this occasion, scholars of various nationalities and scientific backgrounds remembered the young colleague who died prematurely with contributions on topics particularly close to him. The papers were divided into two sections: the first on the figure of Constantine, his Fortleben and the political and religious dynamics of the 4th century; the second on the impact of the presence of the Vandals in the Mediterranean basin in the 5th century and the new political geography determined by the conquest of…

5th centuryConstantineVandal4th centurySettore L-ANT/03 - Storia RomanaEnzo Aiello
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Thermomineral waters of Greece: geochemical characterization

2020

75 °C). In terms of pH most results vary from 5.5 to 823 °C) ii) warm (23 40 °C) iii) thermal (40 75 °C) and iv) hyperthermal (&gtfew springs show either very low pH (&lt10) proposing serpentinization processes. Regarding TDS concentrations collected waters can be subdivided into low salinity (up to 1.5 g/L) brackish (up to 20 g/L) and saline (up to 43 g/L). The medium high salinities can be justified by mixing with sea water and/or strong waterrock interaction processes. Isotope composition of O and H ranges from 12.7 to +2.7 ‰ SMOW and from 91 to +12 ‰ SMOW respectively and is generally comprised between the Global Meteoric Water Line and the East Mediterranean Meteoric Water Line. Only few water samples show a positive shift for δ18O possibly related to high temperature waterrock interaction processes. Carbon dioxide (18 997000 μmol/mol) or N2 (1100 989000 μmol/mol) or CH4 (&ltMany geothermal areas of Greece are located in regions affected by Miocene or Quaternary volcanism and in continental basins characterised by elevated heat flow. Moreover the majority of them is found along the coast as well as in islands of the Aegean Sea and thus thermal water is often brackish to saline due to marine intrusion into costal aquifer. In the present study almost 300 thermal and cold mineral water samples were collected along the Hellenic territory with their physicochemical parameters (temperature pH electrical conductivity and Eh) and the amount of bicarbonates (titration with 0.1N HCl) being determined in situ. Additionally gases found either in free or dissolved phase were sampled. Both water and gas samples were analysed at the INGVPa laboratories for major ions (Ion Chromatography) silica (Inductively Coupled Plasma Optical Emission Spectrometry) chemical composition of free and dissolved gases (Gas Chromatography) water isotopes (O and H) and carbon and helium isotopes of free and dissolved gases (Mass Spectrometry). The temperature of the investigated waters ranges from 6.5 to 98°C pH from 1.96 to 11.98 whilst Total Dissolved Solids (TDS) from 0.06 to 43 g/L. Based on the temperature parameter waters can be divided into four groups: i) cold (&lt0.5 913000 μmol/mol) are the prevailing gas species found in the studied sites. The δ13CCO2 values ranged from 20.1 to +8.5 ‰ whilst the isotope ratio of He from 0.21 to 6.71 R/RA.4) suggesting interaction with H2Srich gases or very high pH values (&gtSettore GEO/08 - Geochimica E Vulcanologia
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Azido and thiocyanato bridged dinuclear Ni(II) complexes involving 8-aminoquinoline based Schiff base as blocking ligands: Crystal structures, ferrom…

2020

Abstract The use of two 8-aminoquinoline-based tridentate N3-donor rigid Schiff base ligands (L1 and L2) with Ni(II) in the presence of the pseudohalides, NaN3 and NaSCN results in the crystallization of the two novel Ni(II) dimers: [Ni2(L1)2(µ1,1′-N3)2(N3)2] (1) and [Ni2(L2)2(µ1,3-NCS)2(NCS)2] (2). Both complexes are centrosymmetric Ni(II) dimers where the Schiff base ligands coordinate the octahedral Ni(II) centres in a mer configuration with one terminal and two bridging pseudohalide ligands in the remaining positions. Complex 1 shows Ni(II) ions connected by a double µ1,1′-N3− bridge whereas in complex 2 the Ni(II) ions are connected by a double µ1,3-NCS− bridge. The magnetic properties…

8-AminoquinolineSchiff baseFerromagnetic material properties010405 organic chemistryCrystal structureAzido/ThiocyanatoNi(II)Crystal structure010402 general chemistry01 natural sciences0104 chemical scienceslaw.inventionIonInorganic ChemistrySchiff baseCrystallographychemistry.chemical_compoundFerromagnetismOctahedronchemistrylawFerromagnetismMaterials ChemistryPhysical and Theoretical ChemistryCrystallizationPolyhedron
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Early ROS-mediated DNA damage and oxidative stress biomarkers in Monoclonal B Lymphocytosis

2012

Monoclonal B Lymphocytosis (MBL) is defined as asymptomatic monoclonal B-cell expansion characterised by a CLL-phenotype, but with less than 5 x 10(9)/I circulating cells. Reactive oxygen species (ROS)-mediated cell damage plays a critical role in the initiation of carcinogenesis as well as in malignant transformation. The goal of this study was to perform an analysis of the oxidative stress statuses of patients affected by MBL and chronic lymphocytic leukaemia (CLL). We examined peripheral blood and urine specimens from 29 patients with MBL, 55 with CLL and 31 healthy subjects. There was a significant increase in the occurrence of the mutagenic base 8-oxo-2'-deoxiguanosine (8-oxo-dG) in th…

8-Oxo-dGMaleChronic lymphocytic leukaemiaCancer ResearchF-2-isoprostanesTime FactorsLymphocytosisDNA damageLymphocytosisBiologyDinoprostmedicine.disease_causeAntioxidantsLipid peroxidationchemistry.chemical_compoundMalondialdehydemedicineHumansCell damageChromatography High Pressure LiquidAgedchemistry.chemical_classificationB-LymphocytesReactive oxygen speciesGlutathione DisulfideDeoxyguanosineMonoclonal B LymphocytosisGlutathioneMiddle AgedMalondialdehydemedicine.diseaseGlutathioneLeukemia Lymphocytic Chronic B-CellOxidative StressOncologychemistryOxidative stress8-Hydroxy-2'-DeoxyguanosineImmunologyDNA damageFemalemedicine.symptomReactive Oxygen SpeciesBiomarkersOxidative stressDNA DamageCancer Letters
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Influencia de los galactooligosacáridos sobre la biodisponibilidad y fermentación colónica de esteroles

2021

El enriquecimiento de alimentos con esteroles vegetales (EV) es una práctica común en el desarrollo de alimentos funcionales orientados a reducir el riesgo de enfermedades cardiovasculares debido a su conocido efecto hipocolesterolemiante. Las bebidas a base de zumo de frutas y leche son una matriz idónea para el enriquecimiento con estos compuestos bioactivos debido a su perfil nutricional saludable. Además, su efectividad se ha demostrado en poblaciones diana como mujeres postmenopáusicas con hipercolesterolemia moderada (población de interés al presentar un mayor riesgo de enfermedad cardiovascular). La adición de galactooligosacáridos (GOS) a estas bebidas podría mejorar su funcionalida…

:CIENCIAS DE LA VIDA::Fisiología humana ::Metabolismo humano [UNESCO]UNESCO::CIENCIAS DE LA VIDA::Fisiología humana ::Metabolismo humanogalactooligosacáridos:QUÍMICA::Química analítica::Análisis cromatográfico [UNESCO]UNESCO::QUÍMICA::Bioquímica ::LípidosmicrobiotaUNESCO::QUÍMICA::Química analítica::Análisis cromatográficobiodisponibilidad:QUÍMICA::Bioquímica ::Lípidos [UNESCO]esteroles vegetales
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Democracia, argumentación e ideologías jurídicas | Democracy, Argumentation and Legal Ideologies

2016

RESUMEN. Este trabajo analiza la relacion de la democracia y la argumentacion juridica desde diversas perspectivas. En primer lugar, desde un punto de vista externo, que apunta al fundamento politico y moral de las corrientes argumentativas dentro de la Filosofia del Derecho. En segundo lugar, aborda esta relacion desde un punto de vista interno, analizando el papel del principio democratico en el marco de un modelo general de racionalidad argumentativa. Y, por ultimo, pretende hacer una caracterizacion de las teorias/ideologias juridicas en el contexto de la democracia constitucional. ABSTRACT. This paper analyzes from varied perspectives the relation between democracy and legal argumentat…

:CIENCIAS JURÍDICAS [UNESCO]Argumentativemedia_common.quotation_subjectPhilosophyK201-487Internal pointContext (language use)Dcho romano Hª y Fª del derechoDemocracyArgumentation theoryCiencias jurídicasPhilosophyUNESCO::CIENCIAS JURÍDICASJurisprudence. Philosophy and theory of lawIdeologyPhilosophy of lawLawHumanitiesCartographymedia_commonCuadernos Electrónicos de Filosofía del Derecho
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La filosofía del derecho mexicana en la era del constitucionalismo

2016

RESUMEN : En este trabajo el autor presenta, en un primer momento, las principales caracteristicas del modelo constitucional mexicano emergente como detonante de importantes cambios a nivel del ordenamiento juridico, los mismos que demandan una concepcion del derecho diferente a las anteriores para dar cuenta de la nueva realidad normativa del pais. El autor describe, despues, los elementos mas destacables de ese virtual enfoque filosofico y sostiene, al final, que este mantiene mayor cercania con el llamado constitucionalismo pospositivista o pospositivismo juridico de autores como Atienza, Alexy, Nino y otros, que con el constitucionalismo iuspositivista de Ferrajoli. ABSTRACT : The autho…

:CIENCIAS JURÍDICAS [UNESCO]Ciencias jurídicasPhilosophyGeographyUNESCO::CIENCIAS JURÍDICASK201-487Jurisprudence. Philosophy and theory of lawLawHumanitiesCartographyPositivismDcho romano Hª y Fª del derecho
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