Browsing by Autor "Juan Carlos"

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Calorimetric: A Tecnique Useful in Characterization of Porous Solid
(2011) Juan Carlos; Liliana Giraldo
The adsorption of gases in porous solids such as zeolites and activated carbons, has been widely applied in cases of separation, purification and bottling of gases This potential is reflected not only in increasing the number of technical and scientific articles and patents, but also in the world market growth in plants for air separation and purification processes of hydrogen and natural gas and many others Due to the various applications of porous adsorbents, many research groups in various parts of the world have sought to develop and improve these materials to improve performance in these specific applications (Bastos-Neto et al. 2005b; Arou et al., 2008; In the procedures for obtaining porous solids, it is necessary to control the various process variables such as preparation, carbonization temperature and time, type and concentration of activating agents, among others, since these activation parameters determine the chemical and physical properties of adsorbents. The textural characteristics are the most important properties of the adsorbents, since it indicates the implementation and performance of the solid obtained (Giraldo and Moreno, 2005). In addition, chemical properties also determine the adsorption properties of adsorbent and solid-fluid interactions. Nature of surface groups, hydrophobic or hydrophilic character and acidic or basic behavior are some of the relevant chemical properties of the adsorbents in adsorption processes. Since the physical and chemical properties of an adsorbent determine the application and performance of the same, it is necessary to determine precisely the parameters that characterize these materials such as surface area, microporosity, pore size distribution, heats of adsorption, among others. Several experimental techniques are used to characterize porous materials, for example, mercury porosimetry, adsorption of liquid nitrogen, x-ray diffraction, etc.. The technique most commonly used to characterize the texture of carbon adsorbents (ie surface area, properties of molecular sieve, size distribution of pores, etc.). Is the physical adsorption of gases and vapors. However, immersion calorimetry, with molecular probes of various molecular dimensions, and gas adsorption microcalorimetry techniques are also applied to characterize this type of solid (Denoyel et al.,
Del Estado multicultural al Estado Plurinacional
(Universidad Internacional de La Rioja, 2009) Durán Bohme; Juan Carlos
En este trabajo el autor propone una lectura de la Constitucion recientemente aprobada en Bolivia, a partir de uno de los caracteres principales del tipo de Estado que en ella se propone: la formulacion del Estado Plurinacional Comunitario. A tales efectos ofrece una sintesis de los contenidos del �discurso de la diferencia cultural indigena� y senala su importancia como una de las fuentes ideologicas principales que subyacen al texto constitucional. Ademas, empleando como clave de interpretacion dicho discurso, realiza un analisis de su incidencia en las partes centrales de la Constitucion y apunta algunas consecuencias de la inclusion del principio de la plurinacionalidad en el sistema constitucional boliviano.
El debate entre la futilidad médica y la limitación del esfuerzo terapéutico. Desde una perspectiva bioética y legal
(2017) Araujo Cuauro; Juan Carlos
It seems logical that, in parallel with the gradual increase in the scientific, technological and pharmacological ability of modern medicine, in order to change the course and the arrival of death, has developed the debate about reasonable limits for the using this technology, continue to serve the interests of sick individuals. At present no one know the term futility, but in the medical field and in patient critical unrecoverable or terminally ill, treatment goals that define it are often confused. So when, how and under what restrictions the establishment or maintenance of certain supportive measures or treatment that may be useless or futile not come to prolong life, but the agony, the pain or suffering must be avoided are the issues around which it is tied so under different names, it was identified today as limitation of treatment (LET), which is not to apply extraordinary measures or disproportionate to the therapeutic purpose that arises in a patient with poor prognosis and / or poor quality of life. Which can be of two types: not initiate certain measures or withdraw when instauradas.Por therefore LET practice seems to be present in the medicine of the past fifty years, but often have not been openly acknowledged, perhaps due to lack conceptually, ethical and legal clarity that has dragged until recently.
Estrategia metodológica para la construcción de redes comunitarias agrícolas en pro del desarrollo local. caso:: Productores de plátano del sur del lago de maracaibo, Venezuela.
(2003) Delgado Barrios; Juan Carlos
En este articulo se presenta una estrategia metodologica para la construccion de redes de participacion comunitaria en funcion del desarrollo local, especificamente en una comunidad de productores de platanos ubicada en la Zona Sur del Lago de Maracaibo, con el proposito de proponer una organizacion alternativa mediante formas de encuentro e integracion de actores locales en forma de redes que permita elevar el nivel de capital social y, con ello, sus capacidades organizativas para el desarrollo local. En funcion de este objetivo, el trabajo se estructura de la siguiente manera: en primer lugar, un marco teorico relacionado con las claves de la investigacion; en segundo lugar, la propuesta de estrategia metodologica para la construccion de redes comunitarias agricolas en pro del desarrollo local; en tercer lugar, la estrategia para dinamizar las redes de participacion comunitaria; en cuarto lugar, la validacion de la propuesta metodologica en la comunidad de productores de platano; y, finalmente, se presentan algunas consideraciones finales a manera de conclusiones.
Las sanciones en materia tributaria en el Ecuador
(2010) Mogrovejo Jaramillo; Juan Carlos
El regimen sancionatorio en materia tributaria es manifestacion del ius puniendi estatal, en el que discurre la sancion como la consecuencia de la realizacion de un supuesto de hecho calificado juridicamente como infraccion, de alli la pertinencia del analisis de esta figura que devele la naturaleza, fines, tipologia y las competencias de los organos administrativos y jurisdiccionales llamados a imponerla, con remision constitucional y legal a la realidad ecuatoriana, que examine tambien los principios que informan a este regimen y a ser observados en los procedimientos e imposicion de sanciones tributarias. The penalty system on tax matters is a manifestation of the state ius puniendi, in which sanctions, as the consequence of the assumptions made in the case legally qualified as an infringement, appear, thus the relevance of the analysis of this precept is to unveil its nature, purpose, type, and the competencies of the administrative bodies and courts called upon to impose it, with reference to the constitutional and legal situation in Ecuador, examining also the principles underlying this penalty system, and to be observed in proceedings and imposition of tax penalties.The penalty system on tax matters is a manifestation of the state ius puniendi, in which sanctions, as the consequence of the assumptions made in the case legally qualified as an infringement, appear, thus the relevance of the analysis of this precept is to unveil its nature, purpose, type, and the competencies of the administrative bodies and courts called upon to impose it, with reference to the constitutional and legal situation in Ecuador, examining also the principles underlying this penalty system, and to be observed in proceedings and imposition of tax penalties.
LEFT AND RIGHT IN COLOMBIA: A Quick Look at the Socio-demographic Features of the Country's Ideological Spectrum
(2007) Rodríguez Raga; Juan Carlos
Prótesis parcial removible con adaptación maxilofacial
(2009) Vielma Monserrate; Juan Carlos
The prosthetic rehabilitation of histic defects caused by a traumatic or congenital origin mostly depends on removable partial dentures held by holders placed over the teeth, where general principles of design for these dentures are used. Obturators that close the resultant defects from maxillary hemisection are incorporated to these prosthetic devices. The present clinical case shows a post surgical defect after a maxillary hemisection in which the unilateral resection of the posterior alveolar ride, posterior teeth and hard palate were performed. This type of lesion represents a Class II defect according to Aramany classification, and was managed by using a removable partial denture held by a hook with acrylic obturator to close the existing oral sinus communication and getting possible to replace the missing teeth in the maxillary. With this treatment it was possible to accomplish the required aesthetic and functional objectives.
SIB 2018 Technical Program Committee Members
(2018) Pablo Andrés; A. de Luca Escalante; Juan Carlos; Briceño Triana; Juan Cordovez Álvarez; Cruz Antón Jiménez; Mario Andrés; Valderrama Manrique