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Search Results: 1 - 10 of 204992 matches for " N. Gabriel Lemcoff "
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Light-induced olefin metathesis
Yuval Vidavsky,N. Gabriel Lemcoff
Beilstein Journal of Organic Chemistry , 2010, DOI: 10.3762/bjoc.6.127
Abstract: Light activation is a most desirable property for catalysis control. Among the many catalytic processes that may be activated by light, olefin metathesis stands out as both academically motivating and practically useful. Starting from early tungsten heterogeneous photoinitiated metathesis, up to modern ruthenium methods based on complex photoisomerisation or indirect photoactivation, this survey of the relevant literature summarises past and present developments in the use of light to expedite olefin ring-closing, ring-opening polymerisation and cross-metathesis reactions.
Commuting Outer Inverses  [PDF]
Muneo Chō, Gabriel Kantún-Montiel
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2013, DOI: 10.4236/alamt.2013.34013
Abstract: The group, Drazin and Koliha-Drazin inverses are particular classes of commuting outer inverses. In this note, we use the inverse along an element to study some spectral conditions related to these inverses in the case of bounded linear operators on a Banach space.
Experiências de liberdade em tempos de guerra: escravos e libertos nas Guerras Cisplatinas (1811-1828)
Aladrén, Gabriel;
Estudos Históricos (Rio de Janeiro) , 2009, DOI: 10.1590/S0103-21862009000200007
Abstract: this paper discusses the impact of cisplatine wars (1811-1828) on the experiences of slaves and free men in the frontier of brazil with rio de la plata. it analyzes their participation in the luso-brazilian army and in the troops commanded by general josé artigas. it suggests that the cisplatine wars and the movements of independence in rio de la plata and brazil inaugurated a process of restructuring of slavery in rio grande do sul, bringing in itself complex implications for the social integration of slaves and free men.
Apoptosis as a target for gene therapy in rheumatoid arthritis
Rabinovich, Gabriel Adrián;
Memórias do Instituto Oswaldo Cruz , 2000, DOI: 10.1590/S0074-02762000000700038
Abstract: rheumatoid arthritis (ra) is characterized by chronic inflammation of the synovial joints resulting from hyperplasia of synovial fibroblasts and infiltration of lymphocytes, macrophages and plasma cells, all of which manifest signs of activation. all these cells proliferate abnormally, invade bone and cartilage, produce an elevated amount of pro-inflammatory cytokines, metalloproteinases and trigger osteoclast formation and activation. some of the pathophysiological consequences of the disease may be explained by the inadequate apoptosis, which may promote the survival of autoreactive t cells, macrophages or synovial fibroblasts. although ra does not result from single genetic mutations, elucidation of the molecular mechanisms implicated in joint destruction has revealed novel targets for gene therapy. gene transfer strategies include inhibition of pro-inflammatory cytokines, blockade of cartilage-degrading metalloproteinases, inhibition of synovial cell activation and manipulation of the th1-th2 cytokine balance. recent findings have iluminated the idea that induction of apoptosis in the rheumatoid joint can be also used to gain therapeutic advantage in the disease. in the present review we will discuss different strategies used for gene transfer in ra and chronic inflammation. particularly, we will highlight the importance of programmed cell death as a novel target for gene therapy using endogenous biological mediators, such as galectin-1, a b-galactoside-binding protein that induces apoptosis of activated t cells and immature thymocytes.
História atlantica vista de baixo: marinheiros, escravos e plebeus na forma o do mundo moderno
Gabriel Aladrén
Tempo , 2011, DOI: 10.1590/s1413-77042011000100013
Abstract:
Foro: "Problemas y alternativas para la paz en Colombia" Los diálogos gobierno-guerrilla en Colombia y las experiencias internacionales: negociando la paz o perpetuando la guerra?
Juan Gabriel Tokatlián
Historia Crítica , 1993,
Abstract:
ERG N AND ARET IN ARISTOTLE'S POLITICAL PHILOSOPHY
Hern??n Gabriel Borisonik
Problemata : International Journal of Philosophy , 2011, DOI: 10.7443/problemata.v2i2.10817
Abstract: In this paper the categories of ergón and areté will be analyzed as fundamental pieces in order to understand the aristotelian political philosophy. The justification of such an exercise is the centrality that both concepts possess when thinking about the happiness, last purpose (telos) of men’s life. Thereby, the different virtues will be examined, as well as the most philosophical and political edges of the Stagirite’s thought, as a way to comprehend the ideas that he sustained about the good behaviour, the straight behaviour and the human reason. This way, the object of this work is to be able to articulate two aspects that constitute the logos: its participation within the human nature and its dynamic aptitude to canalize and solve the conflicts that found the commom life in the polis. En el presente artículo serán analizadas las categorías de ergón y areté como claves para comprender la filosofía política aristotélica. La justificación de tal ejercicio es la centralidad que poseen ambos conceptos a la hora de pensar a la felicidad, fin último (telos) de la vida de los hombres. De ese modo, serán repasadas las diferentes virtudes, así como las aristas más filosóficas y políticas del pensamiento del Estagirita, a fin de comprender sus ideas acerca de lo bueno, lo recto y la razón humana. Así, el objeto de este trabajo es poder articular dos aspectos que constituyen al logos: su participación en la naturaleza humana y su capacidad dinámica de canalizar y resolver los conflictos que hacen de la vida en común de la polis. No presente artigo ser o analisadas as categorias de ergón e areté como chaves para entender a filosofía política aristotélica. A justifica o de tal um exercício é a centralidade que possuem ambos conceitos ao pensar na felicidade, final último (telos) da vida dos homens. Daquele modo, ser o revisadas as diferentes virtudes, como também as extremidades mais filosóficas e políticas no pensamento do Estagirita para compreender as idéias sobre o bem, a retitude e a raz o humana. Deste modo, o objeto deste trabalho é poder articular dois aspectos que constituem ao logos: a participa o na natureza humana e a capacidade dinamica de encanar e resolver os conflitos que constituem a vida em comum da polis.
El sello importa? El rol partidario de los ejecutivos nacionales y provinciales a la luz de las listas peronistas disidentes (1989 - 2009)
Facundo Gabriel Galván
POSTData : Revista de Reflexión y Análisis Político , 2011,
Abstract: Este artículo analiza el rol de los presidentes y gobernadores peronistas en el armado de las listas disidentes para competir en contra del Partido Justicialista (PJ) oficial en elecciones legislativas nacionales. Gran parte de la literatura interesada en estudiar las características organizativas del PJ afirma que los gobernadores son los agentes más importantes en el armado de listas de legisladores nacionales y que su competencia intrapartidaria disminuye en los distritos peronistas. Sin embargo, a partir de la evidencia empírica extraída del estudio sistemático de las disidencias creemos que esos postulados dejan interrogantes. La evidencia aquí presentada revela que el presidente también juega un rol en el armado de esas listas, y que las disidencias son más frecuentes en los distritos peronistas que en los "no peronistas". This article analyzes the role of peronist presidents and governors in the formation of dissident peronist lists competing against the Partido Justicialista (PJ) official structure in national legislative elections. Much of the literature analyzing the PJ organizational features argues that peronist governors are the major political actors assembling of candidates' lists for congressional elections and that intra-party competition within the PJ decreases in peronist districts. However, empirical evidence from the systematic study of peronist dissidence indicates that these proposals do not tell the entire story. The evidence hereby presented reveals that the president also plays a role in designing legislative tickets challenging the power of either governors or provincial party bosses, and that dissidence is more frequent in districts run by peronist governors than in provinces ruled by other parties.
Sobre lectura, literatura y educación
Gabriel Nú?ez Ruiz
álabe , 2010,
Abstract:
Póquer de ases o las lecturas de un novelista sobre escrituras de otros creadores
Gabriel Nú?ez Ruiz
álabe , 2010,
Abstract:
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