12,167 research outputs found
Reticulated vitreous carbon as an electrode material
No full textAn illustrated review of reticulated vitreous carbon (RVC) as an electrode material is presented. Early uses of RVC were largely restricted to small-scale (<1 cm3) electroanalytical studies in research laboratories. RVC properties of a high ratio of surface area to volume and minimal reactivity over a wide range of process conditions, combined with low cost and easy handling, have resulted in a steady diversification of its applications both in research laboratories and in industry. The physical structure of RVC (in terms of pores per linear inch, strut length, strut thickness and area of the trigonal strut) is examined for 10, 30, 60 and 100 ppi (pores per linear inch) grades using scanning electron microscopy. The accurate measurement of these geometrical values presents both theoretical (in terms of definition of trigonal strut area, beginning and end of single strand) and practical problems (large differences in strut length and thickness in individual samples). Data are presented to show the relationships between geometrical properties. Applications include electroanalytical studies and sensors, metal ion removal, synthesis of organics and Fenton s reagent, H2O2 production and batteries/fuel cells
JUAN GARCÍA PONCE "EL MÍSTICO SIN FE":HACIA UNA REINTERPRETACIÓN DE SU ITINERARIO INTELECTUAL
No full textIn this dissertation I analyze Juan García Ponce's novel Crónica de la intervención (1980). There are four aspects of this novel that I am focusing on. The first aspect is the intellectual and cultural context reflected in the novel. This cultural context is at the same time a portrait and a critique of the intellectual dynamics in Mexico during the 1960's. In this aspect I show how the intellectual formation of García Ponce is reflected in the novel and how he defines his position in relation to the literary field.
The second aspect is religion and how religious ideas emerge in this novel. Crónica de la intervención has numerous references to Catholic rituals and practices. On the one hand, the ritualistic and religious practices were important on García Ponce's life and work, and I propose that some of his ritual practices owed a lot to healing rituals; on the other, I propose that these religious references achieve a powerful critique of religion and shows how the social beliefs are in profound crisis since the beginning of the modernity, and how in Mexican society religion is a facade and lacks meaningful content.
The third aspect is eroticism. In this part I respond to other critics of García Ponce about this element of his narration. I am analyzing this aspect on its socio-historical context. Taking off from two of García Ponce’s essays, I argue that he uses eroticism as a device of social subversion and as a powerful element to generate social changes through sexuality. I show that what he clearly states in these essays about subverting the humanist values of the sexuality and the conceptions of the body is reflected in Crónica.
In the last part of this dissertation I analyze the relation of García Ponce to critical theory, principally with the ideas of Herbert Marcuse. García Ponce translated three books and other short writings by Marcuse. Marcuse's ideas were very influential on García Ponce's writings; I show in this part how this novel was conceived, taking in account many of the philosophical ideas assimilated through the work of translatio
Doctor Honoris Causa dels Exc. Srs. D. Luis Díez-Picazo y Ponce de León i D. Joaquín Català Alemany
No full textSolemne acte d'investidura com a doctors Honoris Causa dels Excel·lentíssims Srs. D. Luis Díez-Picazo y Ponce de León i D. Joaquín Català Alemany
Scisco (L. D.). The track of Ponce de Leon in 1513 (Le voyage de Ponce de Leon en 1513).
No full textPoutrin . Scisco (L. D.). The track of Ponce de Leon in 1513 (Le voyage de Ponce de Leon en 1513).. In: Journal de la Société des Américanistes. Tome 10 n°2, 1913. pp. 661-662
Jacob Ponce
No full textTypescript of a biography of Jacob Ponce, who was born in Kentucky, served in the Confederate army and was taken prisoner. He came to Utah in 1911. Author and date of text unknow
LA OBRA PSICOLÓGICA DE ANÍBAL PONCE
No full textEste artículo propone analizar la obra de Aníbal Ponce dedicada a la psicología y su relevancia para la historia de la psicología argentina. Se propone una d...This work analyses the psychological work of Aníbal Ponce and its historical relevance for Argentinian psy-chology. An original segmentation of fo..
Las Memorias del Almirante William D. Leahy como Clave Interpretativa del Alumbramiento y Consolación del Partido Popular Democrático
No full textPart of this essay was presented at the forum "El almirante William D. Leahy, artífice del Gibraltar caribeño en los albores del Partido Popular Democático", hosted on February 14, 2002 at the University of Puerto Rico in Ponce\u27s General Theater.Parte de este ensayo se presentó en el Foro "El almirante William D. Leahy, artífice del Gibraltar caribeño en los albores del Partido Popular Democático", celebrado el 14 de febrero de 2002 en el Teatro General de la Universidad de Puerto Rico en Ponce
Gelidium nayaritense Rodriguez D., Quiroz-Gonzalez N. & Ponce-Marquez M. 2021, sp. nov.
No full textGelidium nayaritense Rodríguez D., Quiroz-González N. & Ponce-Márquez M. sp. nov. (Figs 3–4). Type: — MEXICO. Nayarit: Sayulita, intertidal, 20°52’29’’N; 105°26’72 W, 17 June 2017, D. Rodríguez & N. Quiroz-González, holotype FCME 10875 (Fig. 3a) in FCME (Faculty of Science, Mexico), isotypes: FCME 10869, 10876, 10880, 10881, 10884 in FCME (Faculty of Science, Mexico). Description: —Plants a turf of purple-red thalli, with cylindrical prostrate stolon attached to substratum with brushlike haptera and erect linear to clavate axes, with irregular to smooth margins, cylindrical at base and flattened above, mostly without ramification. When branches occasionally present, irregularly arranged with one order of ramification, 0.4–1.0 cm high, 0.2–1 mm width, 0.1–0.3 mm thick (Fig. 3a–d). Axes in transverse section ovoid, elliptical, elliptical acute or elliptic in half moon, decreasing in diameter towards apex. Shape of vegetative apices acute (Fig. 3e–f). Cortex of 2–3 layers of rounded cells, 6–9 µm in diameter (Fig. 3g –h), outer cortical cells irregularly arranged in surface view. Medulla of 3–6 rows of circular or subcircular cells in transverse section, 12–15 μm in diameter, and with very large intercellular spaces. Internal rhizoidal filaments in small groups within the medulla and concentrated in the subcortex (Fig. 3g –h). Tetrasporangial sori located in proximal parts of ordinary branches, ovoid, 180–390 µm wide and 285 µm long, with small sterile margins. Tetrasporangia irregularly arranged in sori, ovoid, spherical, 20–28 µm in diameter, 21–25 µm long, cruciately divided. Gametophytes not observed. Etymology: —The species epithet referred to the state Nayarit, Mexico, where the type specimen was collected. Distribution and Habitat:—Sayulita in Nayarit to Zihuatanejo in Guerrero. Intertidal rocks, with low incidence of light and high waves. Barcode sequences of holotype specimen: —rbc L GenBank accession number MT 798865 and COI-5P GenBank accession number MT 799807. Other examined material:— MEXICO. Guerrero: Troncones, intertidal, 17°46’4’’N; 101°43’31’’W, 15 January 2017, D. Rodríguez & N . Quiroz-González, 10888, 10889 (FCME).Published as part of Quiroz-González, Nataly, Ponce-Márquez, Ma. Edith, López-Gómez, Norma & Rodríguez, Dení, 2021, Morphological and molecular characterization of two species of Gelidium (Gelidiales, Rhodophyta) from Mexico: G. nayaritense sp. nov. and the new record of G. sanyaense, pp. 161-176 in Phytotaxa 527 (3) on pages 168-169, DOI: 10.11646/phytotaxa.527.3.1, http://zenodo.org/record/575132
D. Juan Antonio Ramírez Hernández [Material gráfico]
No full textFotografía de caballero sentado en una descalzadora con un sombrero en la mano.Copia digital. España : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria., 202
Prevalencia del antígeno D “débil” y su clasificación fenotípica en donantes voluntarios de sangre
No full textEn el campo de la medicina transfusional la correcta identificación de los fenotipos del sistema Rh y en especial del antígeno D debe ser de manera inequívoca por su relevancia clínica. El antígeno D tiene variantes denominadas D parcial, D débil y DEL, las que se producen por mutaciones de los alelos RHD/RHCE o por una supresión en la expresión fenotípica. Se trató de un estudio descriptivo, retrospectivo de corte transversal en el que se realizó una revisión de registros primarios durante el período 2011-2014 validados de acuerdo con el protocolo de Hernández-Sampieri R. Se utilizó estadística descriptiva mediante la aplicación del software informático SPSS versión 22.0 y se estableció la relación entre variables independientes a través del análisis estadístico de Chi-cuadrado. Se determinó una prevalencia de donantes RhD negativos de 1,8 a 2,5% y RhD débil de 1,79 a 2,28%. La fenotipificación serológica permitió identificar que los tipos 2 y 5 eran los más frecuentes. También se estableció la existencia de aloinmunización por anti-D, anti-C y anti-E. Se estableció de esta manera la existencia de D débil y una importante aloinmunización en la población de donantes de sangre tipificados como D negativo y D débil, por lo que se recomienda implementar un algoritmo de identificación del antígeno D en servicios de medicina transfusional
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