1,711 research outputs found
Contrapunteos de Lydia Cabrera
No full textEven today in the history of Cuban anthropology, little attention is paid to the writer and anthropologist Lydia Cabrera, who has only recently begun to be part of the list of intellectuals in official Cuban culture. However, because of her work and life trajectory, Cabrera can be considered the modern founder of studies on Afro-Cuban religions.
The main purpose of this text is to analyse Lydia Cabrera’s ethnographic work based on the idea that there was a ‘counterpoint’, a dialogue, a metaphorical game, between the liminal identity of the author herself – manifested in a racial, cultural, gender, social and political sense – and her interest and dedication to the contribution of slaves and the population of African origin to the history, culture and, ultimately, the identity of their Cuban homeland.Todavía hoy en la historia de la antropología cubana se presta poca atención a la escritora y antropóloga Lydia Cabrera, quien solo muy recientemente ha empezado a formar parte de la nómina intelectual de la cultura cubana oficial. Sin embargo, en función de su obra y trayectoria vital puede considerarse a Cabrera como la fundadora moderna de los estudios sobre las religiones afrocubanas.
El objeto central de este texto es analizar el trabajo etnográfico de Lydia Cabrera a partir de la idea de que existe un contrapunteo, un diálogo, un juego metafórico, entre la identidad liminar de la propia autora -manifiesta en un sentido racial, cultural, de género, social y político- y su interés y dedicación a la aportación de los esclavos y la población de origen africano a la historia, a la cultura y, en última instancia, a la identidad misma de su patria cubana
Synthesis and Characterization of Iridium(III) Complexes with Substituted Phenylimidazo(4,5-f)1,10-phenanthroline Ancillary Ligands and Their Application in LEC Devices
No full textIn this work, we report on the synthesis and characterization of six new iridium(III) complexes of the type [Ir(C^N)2(N^N)]+ using 2-phenylpyridine (C1–3) and its fluorinated derivative (C4–6) as cyclometalating ligands (C^N) and R-phenylimidazo(4,5-f)1,10-phenanthroline (R = H, CH3, F) as the ancillary ligand (N^N). These luminescent complexes have been fully characterized through optical and electrochemical studies. In solution, the C4–6 series exhibits quantum yields (Ф) twice as high as the C1–3 series, exceeding 60% in dichloromethane and where 3MLCT/3LLCT and 3LC emissions participate in the phenomenon. These complexes were employed in the active layer of light-emitting electrochemical cells (LECs). Device performance of maximum luminance values of up to 21.7 Lx at 14.7 V were observed for the C2 complex and long lifetimes for the C1–3 series. These values are counterintuitive to the quantum yields observed in solution. Thus, we established that the rigidity of the system and the structure of the solid matrix dramatically affect the electronic properties of the complex. This research contributes to understanding the effects of the modifications in the ancillary and cyclometalating ligands, the photophysics of the complexes, and their performance in LEC devices
Xirú e “Abaporu” de Damián Cabrera: configurações do “comum” da comunidade / Xirú and “Abaporu” by Damián Cabrera: Community “Common” Settings
No full textResumo: O estudo discute o “comum” (ESPOSITO, 2012; NANCY, 2000) a partir do livro Xirú e do conto “Aboporu” de Damián Cabrera, autor cuja escrita encontra-se pautada nas relações Brasil-Paraguai. Nestas obras estão colocadas em evidência a crise de uma concepção essencialista de comunidade, dada e/ou determinada previamente e o distanciamento do “paradigma moderno imunitário” (ESPOSITO, 2012) que se impõe contra qualquer convivência ou contágio que afete a pretensa pureza da comunidade. Sendo a língua um elemento inerente ao pensamento comunitário, parte-se, também, de certa perspectiva “translingue” (MELLO & ANDRADE, 2019) utilizada pelo autor e que expõe os contatos entre as línguas e as interferências como continuum naturais, transitórios, imprevistos que se articulam nas relações entre estas culturas e não como substâncias dadas previamente.Não menos importante, neste sentido, é a antropofagia manifesta no conto “Abaporu”, uma antropofagia nada ufanista pois, como a perspectiva “translingue” que manifesta Xirú, não é identitária e sim, como têm apontado as leituras contemporâneas que dela fazem Alexandre Nodari (2011), Florencia Garramuño (2019) e Eduardo Sterzi (2017), uma antropofagia como experimentação da diversidade, e com ênfase em uma posição relacional. Desse modo, o “comum” nestas obras se constitui como aquilo que não é próprio à comunidade, como substâncias que se compartilham, mas como laço relacional.Palavras-chave: Damián Cabrera; comum; translinguismo; antropofagia.Abstract: The study discusses the “common” (ESPOSITO, 2012; NANCY, 2000) based on the book Xirú and the short story Aboporu by Damián Cabrera, an author whose writing is based on Brazil-Paraguay relations. These works highlight the crisis of an essentialist conception of community, given and/or determined in advance, and the distancing from the “immunitarian modern paradigm” (ESPOSITO, 2012) that imposes itself against any coexistence or contagion that affects the alleged purity of the community. Since language is an inherent element of community thinking, it also starts from a certain “translingual” perspective (MELLO & ANDRADE, 2019) used by the author and which exposes contacts between languages and interferences as a natural, transitory, unforeseen continuum that are articulated in the relations between these cultures and not as previously given substances. No less important, in this sense, is the anthropophagy manifested in the short story “Abaporu”, an anthropophagy that is far from boastful because, like the “translingual” perspective that manifests Xirú, it is not identity but, as pointed out by contemporary readings made by Alexandre Nodari (2011), Florencia Garramuño (2019) and Eduardo Sterzi (2017), an anthropophagy as an experimentation with diversity, and with an emphasis on a relational position. In this way, the “common” in these works is constituted as what is not proper to the community, as substances that are shared, but as a relational bond.Keywords: Damián Cabrera; common; translingual; anthropophagy
Substituent influence in phenanthroline-derived ancillary ligands on the excited state nature of novel cationic Ir(<scp>iii</scp>) complexes
No full textInfluence of ancillary ligands derived from phenanthroline on the nature of the deactivation pathways of novel cationic Ir(iii) cyclometalated complexes.</p
Rhenium (I) complexes based on iminopyridyl ligands: Structural, photophysical, and CO2 electrocatalytic reduction studies
No full textFive rhenium complexes [Re(CO)3(N,N)Cl] (C1–5), in which N,N represents iminopyridyl ligands, were successfully synthesized. The structural characterization of these compounds includes NMR, FT-IR, and HRMS analyses. Additionally, the molecular structures of C2 and C3 were determined through X-ray diffraction analysis. Electrochemical characterization indicates a metal-centered HOMO and a ligand-centered LUMO, with the latter strongly influenced by the nature of the substituent. The photophysical properties of all complexes were examined using UV–Vis spectroscopy and spectrofluorometric measurements in dichloromethane solution at
room temperature, as well as in the solid state. All complexes exhibit a spin-allowed MLCT absorption transition in the 405–471 nm range. In degassed dichloromethane solution at room temperature, complexes C1–3 and C5 display an unstructured MLCT emission in the red region of the visible spectrum. In contrast, complex C4, which features the lower-energy absorption, is nearly non-luminescent. Conversely, all complexes show emission in the solid state, with bands presenting a distinctive hypsochromic shift characteristic of MLCT states. Finally, all compounds were evaluated for their ability to promote the electrocatalytic reduction of CO2, showing turnover frequencies (TOFs) ranging from 8.1 to 304.4 s-1
Synthesis of New Phosphorescent Imidoyl-Indazol and Phosphine Mixed Ligand Cu(I) Complexes – Structural Characterization and Photophysical Processes
No full textFour mononuclear Cu(I) complexes were prepared, described as [Cu(N,N)2]PF6 (1) and [Cu(N,N)(P,P)]PF6 (2-4), where N,N is N-(1-(2H-indazol-2-yl)ethylidene)-2,6-diisopropylaniline and P,P are phosphine derived ancillary ligands (bis[2-(diphenylphosphino)phenyl]ether (POP), bis(diphenylphosphino)ethane (dppe) or 2 PPh3). These new species were characterized by NMR, FT-IR, elemental analyses, cyclic voltammetry, UV-Vis – emission spectroscopy, transient absorption spectroscopy and DFT calculations. In addition, complexes 1 and 2 were characterized by X-ray diffraction. The four complexes showed an MLCT absorption band between 400-450 nm, in addition to a weak structured phosphorescence in a 4:1 ethanol:methanol glassy matrix at 77 K. Complexes 2-4 have emission profiles that resemble the phosphorescence of the protonated N,N ligand, suggesting a triplet LC character of the lowest lying excited state at 77 K. By contrast, a mixed MLCT/LC triplet emission is most likely responsible for the phosphorescence in complex 1. Weak ligand-centered emission is also detected in the solid state at room temperature but only in the case of complexes 2 and 4, suggesting thermally activated deactivation processes in the case of 1 and 3. Notably, the transient absorption spectroscopy of complexes 2-4 in CH2Cl2 solution confirms a strong contribution from a ligand-centered (LC) triplet excited state, pointing towards a mixed 3MLCT/3LC character of the transient species in solution at room temperature, undergoing a non-radiative deactivation in the s time-scale. This behavior markedly differs from that observed for complex 1, whose short-lived 3MLCT excited state is followed by ultrafast transient absorption spectroscopy
Juan Bautista Cabrera Ivars: un reformador protestante en el siglo XIX español
No full textThis article synthesizes the biography of Juan Bautista Cabrera Ivars within the legal context of the period. It underlines Cabrera’s role as both an organizer and a reformer and introduces the novelty of his election as a member of the prestigious Hispanic Society of America. A number of previously unpublished documents are included within the article; likewise, in the appendix, the author classifies Cabrera’s written works, almost all of which resulted from his fervor as a reformer, and gives statistics of the growth of Protestantism in Spain from the sixteenth century until today.El trabajo presenta, siguiendo un criterio cronoespacial, una síntesis de la biografía de Juan Bautista Cabrera Ivars, precedida de una breve descripción del ordenamiento jurídico en que transcurre. Se presta atención particular a la obra organizativa y reformista y se destaca el hecho novedoso de haber sido elegido miembro de la Hispanic Society of America. En el cuerpo del texto se reproducen algunos documentos inéditos y en apéndice se adjunta una clasificación de la obra escrita, surgida casi toda ella del impulso reformador y como complemento de tal empresa, y una estadística del desarrollo del protestantismo en España
Aplicación de la (3R,8S,8aS)-8-bromo-3- fenilhexahidro-5H-oxazolo[3,2-a]piridin-5-ona en el diseño in silico de derivados piperidínicos como inhibidores de la β-secreteasa-1
No full text"La síntesis de alcaloides que contienen en su estructura enamidas endocíclicas derivadas del (S)-(+)- y (R)-(-)-2-feniglicinol son utilizadas como material de partida para preparar lactamas bicíclicas enantiopuras. Estas lactamas son intermediarios en la síntesis de alcaloides piperidínicos, muchos de los cuales tienen propiedades farmacológicas importantes, por lo tanto, son blancos específicos de nuevas técnicas de síntesis. Particularmente las lactamas bicíclicas derivadas de R-(-)- y S-(+)-2-fenilglicinol han surgido como herramienta para incorporar estereoselectivamente diversos radicales en diferentes posiciones del anillo de piperidina. En este trabajo se presenta el diseño in silico de derivados piperidínicos y se propone una ruta sintética de los compuesto con mayor potencial biológico contra enfermedades neurodegenerativas"
El Marco de Representación Observacional y su Implicación en Similaridad de Documentos, Agregación de Características y Fusión de Rankings
No full textThis is a summary of the Ph.D. thesis written by Fernando Giner Martínez at National Distance University ETSI - UNED, under the supervision of Ph.D. Enrique Amigó Cabrera. The author was examined on Thursday, September 23th, 2021 by a committee formed by Ph.D. Fermín Moscoso del Prado Martín from Lingvist and Radbound University Nijmegen, Ph.D. Julián Urbano from University of Delf and Ph.D. Victor Fresno Fernández from UNED. The Ph.D. thesis obtained Summa Cum Laude.Este es un resumen de la tesis doctoral realizada por Fernando Giner Martínez en la Universidad Nacional de Educación a Distancia ETSI - UNED bajo la dirección del doctor D. Enrique Amigó Cabrera. El acto de defensa tuvo lugar el jueves 23 de septiembre de 2021 ante el tribunal formado por los doctores D. Fermín Moscoso del Prado Martín de Lingvist y de Radbound University Nijmegen, D. Julián Urbano de la Universidad de Delf y D. Victor Fresno Fernández de la UNED. La tesis obtuvo la calificación de Sobresaliente Cum Laude por unanimidad.The work was supported by the Ministerio de Economía y Competitividad, TIN Program (Vemodalen), under Grant Number: TIN2015-71785-R
The tragedies of Maria Rosa Galvez de Cabrera (1768-1806).
No full textThe aim of this thesis is to advance an understanding of the author's corpus of tragic plays, eight in total. Chapter One explores continuities and changes in Galvez's critical
fortunes in the last two hundred years. Chapter Two examines the author's commitment to write tragedy in the light of notions of the genre in eighteenth-century Spain, situating
Galvez's innovation and experimentation with generic constants both ancient and modern in the context of the contemporary debate on theatre. The remaining eight chapters are dedicated to analyses of aesthetic, structural and
thematic elements of each play: Afi-Bek, set in Mameluke Egypt, whose ensemble cast of characters and uncompromising portrayal of cruelty and barbarity perplexed contemporary critics; Safil, which dramatised the final hours in the life of this Biblical figure in the uni-personal melologo format; Safo, which depicted the Greek poet's passionate yet solemn act of suicide; Florinda, which interrogated the legend of the Moorish Conquest of Spain; Blanca de Rossi, in which elements of the emergent Gothic style animated the familiar
tragic dilemma between public duty and personal honour;
Amnon, which recast the Biblical story of Amnon and Tamar and engaged with earlier treatments by Calderon de la Barca and Tirso de Molina; Zinda which addressed issues of slavery, colonialism and nationhood, drawing on elements and techniques associated with sentimental comedy; La delirante, in which Galvez approached the historical account of the rivalry between Tudor and Stuart, through the character of Leonor, Mary Stuart's daughter. The systematic analysis of these plays reveals Galvez as a self-conscious and skilful tragedian, able to fuse the conventions of ancient models of tragedy with the devices of new dramatic and literary forms to create a body of tragic writing which is at once experimental, innovative and essentially classicising
- …
