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Now showing items 6087-6106 of 40263
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Catalanismo y antifascismo entre Cataluña y América durante la Guerra Civil Española: el rol del "Butlletí Especial per als Catalans Absents de la Pàtria", 1937-1939
(Servicio Editorial de la Universidad del País Vasco/Euskal Herriko Unibertsitatearen Argitalpen Zerbitzua, 2020)Durante la primera mitad del siglo XX, las conexiones del catalanismo interior con los "catalanes de América", el sector de emigrantes y exiliados que lo apoyaron en tierras americanas, experimentaron un gran crecimiento. ... -
CATALÁN MARTÍNEZ, Elena y MUGARTEGUI EGUIA, Isabel, Gipuzkoa industrial (1886-1924). Universidad del País Vasco, Bilbao, 2017. 404 pp.
(Servicio Editorial de la Universidad del País Vasco/Euskal Herriko Unibertsitatearen Argitalpen Zerbitzua, 2018)... -
Catalizadores estructurados para la reacción de Sabatier
(2022-03-17)En el proceso, denominado Power-to-Gas, se transforma la energía eléctrica producida por fuentes de energía renovables que es difícilmente almacenable, en energía química almacenable, dando así una alternativa a la energía ... -
Catalizadores estructurados para la Síntesis de Fischer-Tropsch: efectos difusionales y térmicos
(2016-10-21)La Síntesis de Fischer-Tropsch (SFT) es un proceso conocido para la transformación del gas de síntesis en hidrocarburos líquidos de alta calidad. Sin embargo, a escala industrial presenta tres desventajas. La primera de ... -
Catalizadores organometálicos de hierro para la reducción de cetonas con importancia metabolica
(2023-10-09)[ES] Los compuestos organometálicos pueden ser utilizados como catalizadores intracelulares de reacciones de regulación metabólicas y, por lo tanto, tener una aplicación terapéutica. En este trabajo, con el objetivo de ... -
Catalysis of a 1,3-dipolar reaction by distorted DNA incorporating a heterobimetallic platinum(II) and copper(II) complex
(Royal Society of Chemistry, 2017-08-11)A novel catalytic system based on covalently modified DNA is described. This catalyst promotes 1,3-dipolar reactions between azomethine ylides and maleimides. The catalytic system is based on the distortion of the double ... -
Catalyst Deactivation And Regeneration Processes In Biogas Tri-Reforming Process. The Effect Of Hydrogen Sulfide Addition
(MDPI AG, 2018-01-09)This work studies Ni-based catalyst deactivation and regeneration processes in the presence of H2S under a biogas tri-reforming process for hydrogen production, which is an energy vector of great interest. 25 ppm of hydrogen ... -
Catalyst-Free Amino-Yne Click Reaction: An Efficient Way for Immobilizing Amoxicillin onto Polymeric Surfaces
(MDPI, 2024-01-15)Surface modifications play a crucial role in enhancing the functionality of biomaterials. Different approaches can be followed in order to achieve the bioconjugation of drugs and biological compounds onto polymer surfaces. ... -
Catalysts and conditions in the oxidative steam reforming of bio-oil for stable H2 production
(2018-06-28)Se ha estudiado la producción de H2 mediante reformado oxidativo (OSR) de bio-oil, un proceso catalítico alternativo y más económico respecto del convencional reformado con vapor. Para los ensayos cinéticos se ha empleado ... -
Catalysts for Syngas Production
(MDPI, 2020-01-20)Synthesis gas (or syngas) is a mixture of hydrogen and carbon monoxide, that may be obtained from alternative sources to oil, such as natural gas, coal, biomass, organic wastes, etc [...] -
Catalysts of Ni/α-Al2O3 and Ni/La2O3-αAl2O3 for hydrogen production by steam reforming of bio-oil aqueous fraction
(Elsevier, 2012-12-04)This paper reports on the steam reforming, in continuous regime, of the aqueous fraction of bio-oil obtained by flash pyrolysis of lignocellulosic biomass (sawdust). The reaction system is provided with two steps in series: ... -
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Catalytic Asymmetric α-Functionalization of α-Branched Aldehydes
(MDPI, 2023-03-16)Aldehydes constitute a main class of organic compounds widely applied in synthesis. As such, catalyst-controlled enantioselective α-functionalization of aldehydes has attracted great interest over the years. In this context, ... -
Catalytic Enantioselective Cloke–Wilson Rearrangement
(Wiley-VCH, 2018-05-09)Racemic cyclopropyl ketones undergo enantioselective rearrangement to deliver the corresponding dihydrofurans in the presence of a chiral phosphoric acid as the catalyst. The reaction involves activation of the donor-acceptor ... -
Catalytic enantioselective domino Michael/transannular aldol reaction under bifunctional catalysis
(Royal Society of Chemistry, 2020-09-28)The enantioselective Michael reaction catalyzed by a bifunctional tertiary amine/squaramide has been used to trigger a Michael/transannular aldol cascade process that leads to densely substituted bicyclo[5.4.0]undecanes ... -
Catalytic Enantioselective Synthesis of Tertiary Thiols From 5H-Thiazol-4-ones and Nitroolefins: Bifunctional Ureidopeptide-Based Brønsted Base Catalysis
(WILEY-VCH Verlag, 2013-09-17)The direct catalytic reaction between an enolizable carbonyl compound and an electrophile under proton-transfer conditions has emerged as a challenging versatile transformation in organic synthesis.1 Over the last years ... -
Catalytic Enantioselective Transannular Morita–Baylis–Hillman Reaction
(American Chemical Society, 2019)Catalytic and enantioselective approaches to transannular reactions are very limited and mostly are based on chiral Lewis acid catalyzed pericyclic reactions. In this report, we present an efficient and straightforward ... -
Catalytic Enantioselective Transannular Reactions towards C-B and C-C Bond Formation
(2023-03-24)Las reacciones transanulares han demostrado ser una herramienta sintética eficiente para la preparación de moléculas policíclicas complejas. Esta reactividad se ve favorecida por la liberación de tensión que se produce ... -
Catalytic Generation of Donor-Acceptor Cyclopropanes under N-Heterocyclic Carbene Activation and their Stereoselective Reaction with Alkylideneoxindoles
(Wiley-VCH, 2017-04-10)Formylcyclopropanes undergo activation in the presence of an N-heterocyclic carbene catalyst generating a donor-acceptor cyclopropane intermediate with the ability to undergo ring-opening followed by formal [4+2] ... -
Catalytic Oxidation of Vinyl Chloride over SrCO3-Co3O4 Catalysts: Effect of the Sr:Co Molar Ratio
(The Italian Association of Chemical Engineering (AIDIC), 2023-05-30)Co3O4 catalysts modified with SrCO3 with various Sr:Co molar ratios were synthesized by a co-precipitation method and their catalytic behavior was examined for the gas-phase oxidation of vinyl chloride. The physicalchemical ...