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Search Results: 1 - 10 of 462795 matches for " García Aranda "
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Nomenclaturas decimonónicas del espa?ol
García Aranda,Ma ángeles;
Boletin de Linguistica , 2010,
Abstract: this article analyzes some of the spanish terminology in nineteenth century bilingual publications, in order, firstly, to confirm the success of their thematic organization in second language vocabulary acquisition, and, secondly, to contribute to the production of historical bilingual dictionaries of spanish and other languages, given that the data analyzed for this study was written in spanish and french (le petit nécessaire des fran?ais qui vont en espagne y la langue espagnole apprise sans ma?tre en 30 le?ons), spanish and english (guía para la conversación en espa?ol e inglés y gramática espa?ola inglesa), spanish and italian (gramatica della lingua spagnuola) and spanish and basque (método práctico para ense?ar el castellano).
Biological Tissue Modeling with Agar Gel Phantom for Radiation Dosimetry of 99mTc  [PDF]
Liliana Aranda-Lara, Eugenio Torres-García, Rigoberto Oros-Pantoja
Open Journal of Radiology (OJRad) , 2014, DOI: 10.4236/ojrad.2014.41006
Abstract:

The biological tissue has been mimicked and replaced by other materials, which have shown certain radiological similarity determined by attenuation coefficient (μ), density and atomic number. Specifically, in molecular imaging and radiation therapy have been developed multifunctional radiopharmaceuticals which contain beta/gamma and/or light emitters to chronic degenerative diseases treatment. Therefore, it is necessary to develop phantoms that allow optical and radiometric characterization. Since the agar gel has shown to be a medium which allows to model biological tissue in phototherapy studies, the aim of this study is to determine whether the agar gel may be used as biological tissue substitutes in 99mTc dosimetry. Agar gel was prepared to 1% and 2.3% (water:agar) and its radiologicalproperties as: linear attenuation coefficient obtained by narrow beam geometry and XCOM software, density and effective atomic number (Zeff) were determined. Using the determined μ, photontransmission was calculated by Monte Carlosimulation. The 99mTc source region was immersed in a water phantom, two source regions were used, one source region was filled with water and another with agar gel. For both cases; the cumulated activity (\"\") by conjugate view method, the absorbed doseper unitcumulated activity (S) and absorbed dose (D) were determined. The 2.3% concentration gel consistency facilitated its handling during a bigger irradiation time. A \"\" was obtained and also this value was corroborated with the XCOM software. The agar gel density was \"\" and \"\". The calculated cumulated activity presented 1% difference in both phantoms. The absorbed doseper unitcumulated activity was the same in both media, therefore the D too. Agar gel showed to be equivalent to water in terms of radiological properties for 140 keV photons, thus it can substitute soft tissue in 99mTc dosimetry.

Hearing Disability in Colombia Self-Perception and Associated Factors 2002-2008  [PDF]
Augusto Pe?aranda, Sandra Martínez, María Leonor Aparicio, Juan Manuel García, Clemencia Barón
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2015, DOI: 10.4236/ijohns.2015.41004
Abstract: Introduction: Hearing disability is a condition that affects normal ear function, as much in adulthood as in the first years of life. According to the 2005 Census, 6.3% of the Colombian population has some type of disability, of which 17.4% have hearing limitations, including those with hearing devices. Elucidating the conditions of this population and identifying the factors related to hearing disability will permit the management of strategies from different sectors to mitigate the consequences associated with this limitation. Objective: To estimate the self-perception of hearing disability in Colombia and to determine the factors associated with this limitation. Materials and Methods: The present study is cross-sectional, based on the analysis of secondary information obtained from the Registry for Localization and Characterization of Persons with Disability (RLCPD) during the 2002-2008 period. Socio-demographic and healthcare variables were analyzed. Results: 13.6% (102,648/750,377) of the population reported hearing limitations even with the use of special hearing devices. 43.52% (44,041) of people over 3 years of age could neither read nor write. 29.39% (30,145) of people who reported this limitation are not affiliated to any sort of health insurance system. Factors found to be associated with hearing limitations were: socioeconomic stratus (OR: 1.33; CI 95% 1.25; 1.42), illiteracy (OR: 1.44; CI 95% 1.42; 1.46) and lack of affiliation to a health insurance system (OR: 1.03; CI 95% 1.01; 1.04). Conclusion: People registered with hearing disability live under vulnerable conditions; among them, most/the majority pertained to a segment of the population with low economic resources and had difficulty obtaining/accessing work, education and healthcare services.
Analysis of the physical demands placed on football referees during competitive matches Análisis del rendimiento físico de los árbitros de fútbol durante partidos de competición oficial
J. Mallo,J. M. García-Aranda,E. Navarro
Motricidad : European Journal of Human Movement , 2010,
Abstract: The aim of this study was to examine the procedural knowledge level in young volleyball players and to establish the relationship between procedural knowledge, experiencie and performance, being the performance the championship positions obtained at the end of the competition. Participants in the study were 110 male young players of the regional teams that disputed the Spain Champioship in Cáceres in june of 2005, and with 1 to 6 years of volleyball experience. The variables of this study were proceedural knowledge, experience in organised volleyball, experience in unorganised volleyball and performance (championship position). Procedural knowledge was measured by the volleyball players by means of “volleyball procedural knowledge test” (Moreno, 2006). The results revealed the lineal and significative relationship between procedural knowledge, experience in organised volleyball and performance, indicating that high-procedural knowledge and experience in organised volleyball exhibited high-championship position. Regression analysis indicated that experience in organised volleyball and procedural knowledge were the main predictor of performance. These findings are discussed with previous researchs. KEY WORDS: procedural knowledge, experience, performance, volleyball. El objetivo de este trabajo fue examinar la evolución de diversos parámetros cinemáticos y fisiológicos durante partidos de competición oficial en árbitros de fútbol. El análisis de la participación en el juego se realizó con un sistema fotogramétrico bidimensional durante 12 partidos del Campeonato del Mundo sub-17 del a o 2003. La frecuencia cardiaca se registró con pulsómetros Polar S610 en intervalos de 5 s. Se pudo apreciar un descenso del rendimiento físico en distintos momentos del encuentro: (i) tras los 5 min más intensos del partido en los siguientes 5 min disminuyó (p<0.05) la cantidad de ejercicio de alta intensidad realizado en relación a la media del partido; (ii) en los primeros 15 min del segundo tiempo la distancia recorrida (p<0.05), el ejercicio de alta intensidad (p<0.01) y la FCmed (p<0.001) fueron inferiores a los valores de la fase inicial del partido; y (iii) durante el segundo período se produjo una disminución global de la intensidad del esfuerzo. Los resultados de este estudio sugieren que se deben prescribir programas de entrenamiento específicos para los árbitros para prevenir, o cuanto menos retardar, esta pérdida de rendimiento físico en distintos momentos de un partido. PALABRAS CLAVE: análisis biomecánico 2D; distancia recorrida; ejercicio alta intensidad;
Los polifenoles antioxidantes extraídos del epicarpio de Palta (Persea americana var. Hass) inhiben la ureasa de Helicobacter pylori
Felipe CHáVEZ,Mario ARANDA,Apolinaria GARCíA,Edgar PASTENE
Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas , 2011,
Abstract: La infección crónica por Helicobacter pylori produce gastritis crónica o patologías más severas como la úlcera péptica y adenocarcinoma gástrico. Nuevos agentes anti-H. pylori se han encontrado en los productos naturales, donde destacan los polifenoles. La inhibición de enzimas como la ureasa, resulta ser una estrategia interesante mediante la cual los polifenoles pueden limitar la colonización por H. pylori. A partir del epicarpio del fruto de Persea americana (palto) se obtuvo un extracto polifenólico (77 % de EAG), rico en procianidinas derivadas de epicatequina, con un grado de polimerización DPm = 6.10. La capacidad antioxidante fue evaluada mediante TEAC-DPPH, TEAC-CUPRAC, TEAC-FRAP, TEAC-crocina. El extracto mostró una actividad inhibitoria de la ureasa de H. pylori con un IC50 = 1.02 g EAG/mL. El fraccionamiento de las procianidinas permitió agruparlas según su peso molecular, observándose una clara relación entre su tama o y la capacidad de inhibir la ureasa.
Redes sociales y reflexividad: su importancia en la construcción de la sociedad civil en México
José Aranda Sánchez,Andrea García Campuzano
Ciencia Ergo Sum , 2007,
Abstract: El objetivo de este artículo es analizar algunos de los principales rasgos que presenta la reflexividad de las redes sociales en México, y su importancia en la autoconstrucción de la sociedad civil. Se ofrece una revisión de las principales orientaciones teóricas sobre redes sociales en el país, así como un esquema en el que se plantean tres tipos de reflexividad: autoconsciente, autorreferente y constitutiva, como vías específicas para la diferenciación del caso de estudio.
Estudios sobre los enfermos hipertensos en tratamientos en Espa a durante el periodo 1990 - 1993
García Ruiz Antonio J.,García Ruiz Inmaculada,Aranda Lara Pedro,Montesinos Ana C.
Revista Espa?ola de Salud Pública , 1997,
Abstract: FUNDAMENTO: El objetivo principal de nuestro trabajo ha sido conocer desde la perspectiva de la farmacoepidemiología el uso de los fármacos antihipertensivos en nuestro país con objeto de obtener una estimación cruda del número de enfermos hipertensos en tratamiento en las diferentes Comunidades Autónomas. MéTODOS: Los datos referentes al consumo de los medicamentos antihipertensivos (monofármacos) desde 1990 a 1993 se han obtenido de la Subdirección General de Asistencia y Ordenación Farmacéutica. La metodología empleada para el cálculo de laEstimación de la Prevalencia de Enfermos-Día en tratamiento con estos fármacos se basa en las recomendaciones de la OMS para los Estudios de Utilización de Medicamentos. Se ha calculado la Estimación de la prevalencia de enfermos-día (EPED), empleándose para su cálculo la Dosis Diaria Definida de cada uno de los fármacos antihipertensivos. RESULTADOS: Los hipertensos en tratamiento con estos fármacos han sido 1.736.937, 1.966.398, 2.226.225 y 2.435.294 durante 1990 a 1993 respectivamente. A final de nuestro estudio, 1993, el número de hipertensos tratados en Espa a se aproxima al 50% del total de hipertensos. Existen diferencias interregionales, así las Comunidades Autónomas de Aragón, Castilla-La Mancha, Catalu a, País Valenciano y Murcia destacan como las regiones donde el número de hipertensos tratados es superior a la media nacional. CONCLUSIONES: El número de hipertensos en tratamiento ha aumentado considerablemente desde 1990 a 1993 (+40%). Se aprecia un aumento en el número de hipertensos en tratamiento con antagonistas del calcio e inhibidores de la ECA y una disminución en la proporción de hipertensos en tratamiento con Beta bloqueantes y Diuréticos.
Platelet Endothelial Cell Adhesion Molecule (PECAM-1) Expression in Malignant Human Tumours and their Metastases  [PDF]
Juan R de la Haba Rodríguez, Ignacio Porras Quintela, Gema Pulido Cortijo, Concepción Lucena Martínez, Javier García Corbacho, Enrique Aranda Aguilar
Journal of Cancer Therapy (JCT) , 2010, DOI: 10.4236/jct.2010.12011
Abstract: PECAM-1 is an adhesion molecule that plays an important role in the process of tumour disease dissemination since a function in transendothelial migration, angiogenesis and immune response has been shown for this membrane protein. Nevertheless the expression of PECAM-1 protein in solid tumours is a controversial matter and it has not been clarified so far. Thus, the aim of our study was to investigate PECAM-1 expression by immunohistochemistry in primary carci-nomas from colon, breast, bladder, ovary and kidney, and in their metastases. In addition an example of primary and metastatic melanoma was also investigated. We found that PECAM-1 is expressed in the metastases of all primary car-cinomas that express PECAM-1 (colorectal, breast and urothelial bladder). By the contrary metastases from primary carcinomas non-expressing PECAM-1 are also negative for expression. In conclusion, our findings support a possible role of this molecule in metastatic development of a subset of malignant human epithelial tumours.t
Protocol for maximizing the triglycerides-enriched lipids production from Dunaliella salina SA32007 biomass, isolated from the Salar de Atacama (Northern Chile)  [PDF]
Diana Arias-Forero, Gladys Hayashida, Mario Aranda, Solange Araya, Tamara Portilla, Andreína García, Paula Díaz-Palma
Advances in Bioscience and Biotechnology (ABB) , 2013, DOI: 10.4236/abb.2013.48110
Abstract:

This paper reports the effects of different culture conditions for Dunaliella salina SA32007 from Salar de Atacama (second Region, northern ofChile) over biomass, lipid production and triglycerides synthesis. A maximum value of microalgae density (8.2 × 109 Cells/L) and an intrinsic growth rate (0.17 d-1), were obtained using a culture with 0.5 mol/L of NaCl and a nitrogen/phosphorous (N/P) limitation of 14/1. The triglycerides production was significantly favoured under nitrogen deficiency conditions (Mann-Whitney test; p = 0.0043). However there was a nitrogen-limiting threshold for the stimulation and accumulation of triglycerides (N/P: 14/1), lower than that limit, these compounds would not be accumulated. It was also observed that triglyceride content was not proportional to the total lipid content and the maximum number of cells. The aeration system employed stimulated the growth and synthesis of structural organic molecules. Regarding microalgae growth stage subjected to nitrogen deficiency, when the deficit was applied before the lag phase, the negative effect on the biomass and the triglycerides production decreased.

Dolor torácico con elevación del segmento ST en un consumidor de cannabis
A Supervía,F del Ba?o,C García,MD Aranda
Revista de Toxicología , 2009,
Abstract: La miocarditis se define como una inflamación del miocardio. Frecuentemente se asocia a afectación pericárdicaconstituyendo una miopericarditis. Su etiología es muy variada, e incluye agentes infecciosos, químicos como drogas de abuso,radiaciones e hipersensibilidad a fármacos. La causa más frecuente es la infección por enterovirus. Es más frecuente en ni os, adolescentes y adultos jóvenes, con predominio del sexo masculino. Aunque las manifestaciones clínicas son muy variables, en algunos casos puede semejar un síndrome coronario agudo. Por otro lado, el consumo de cannabis, se ha asociado a vasoespasmo, infarto agudo de miocardio y taquiarrítmias. Se describe el caso de un varón joven, consumidor de cannabis, que consultó por dolor torácico con alteracioneselectrocardiográficas y enzimáticas sugestivas de síndrome coronario agudo con elevación del ST. Se discute el diagnóstico diferencial, métodos diagnósticos y actitud terapéutica.
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