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Search Results: 1 - 10 of 387109 matches for " Elva L. CáRDENAS MIRANDA "
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LA REFORMA DE 15 DE JUNIO DE 2011 AL CóDIGO CIVIL PARA EL DISTRITO FEDERAL
Elva L. CáRDENAS MIRANDA
Boletín mexicano de derecho comparado , 2012,
Abstract: ...
Comportamiento de películas de Quitosán compuesto en un modelo de almacenamiento de aguacate
S. Patricia Miranda,Galo Cárdenas,Damián López,Alma V. Lara Sagahon
Revista de la Sociedad Química de México , 2003,
Abstract: Se conoce que las películas de quitosán son buenas barreras al oxígeno y al dióxido de carbono. No obstante, las películas de quitosán mezcladas con emulsificantes y plastificantes mejoran sus propiedades fisicomecánicas. La adición de glicerol, tween 80 y cera a las películas, aseguran la permeabilidad al agua y mejoran las propiedades mecánicas como elongación, fuerza de tensión y módulo elástico. Este material novedoso potencialmente puede ser usado como empaque de alimentos biodegrdable.
The influence of a constructivist model for teaching tactics in basketball on the effectiveness of the game during the competition
Francisco Alarcón López,David Cárdenas Vélez,M. Teresa Miranda León,Nuria Ure?a Ortín
Retos : Nuevas Perspectivas de Educación Física, Deporte y Recreación , 2010,
Abstract: The performance in basketball comes determined not only for the capacity of execution of the participants but for the aptitude to overcome the adversary who generates a changeable environment, where the player must be analyzing and deciding constant the actions to obtain to score. The aim of this study was to analyze if with a program of training for the tactics, based on a model constructivism , it is possible to manage to improve the performance of a male basketball team formed by 10 players seniors. For it there were in use as dependent variables the efficacy of positional attacks and the effectiveness of tactical media, understood as the ability to achieve benefits of space with ball player.. The data Collection of information was realized by means of methodology observational thanks to a before validated instrument. A design was in use pretest-postest without group control. The results showed that an improvement existed in the efficiency of the assaults posicicionales with very significant differences, happening from 28,6 % of efficiency in the pretest to 67,5 % in the postest.The same results repeated themselves with the efficiency of the tactical means, this time with highly significant differences, happening from an efficiency of 29,5 % in the pretest to one from 64,9 % in the postest. The principal conclusion of the study is that a program of training for the education of the collective tactics based on a model constructivist has a positive influence in the performance of a basketball team.
The Constructivist Approach as an Explanatory Model in Team Sports
Francisco Alarcón López,David Cárdenas Vélez,María Teresa Miranda León,Nuria Ure?a Ortín
Universitas Psychologica , 2011,
Abstract: The aim of this paper is to explain how it is necessary to use constructivist theory to understand the mechanisms that occur in the learning of team sports. These have distinct characteristics that give rise to many skills, which also require a motor domain, the capacity of each player to know when and where to use them, i.e. it needs a process of understanding the logic of the game to play. Most of the teaching models that are currently used in sports training is still based on theories of associative learning in which the player must acquire a skill set so decontextualized, this teaching being insufficient for understanding the team sports
La metodología de ense anza en los deportes de equipo
Francisco Alarcón López,David Cárdenas Vélez,María Teresa Miranda León,Nuria Ure?a Ortín
Revista de Investigación en Educación , 2010,
Abstract: Una de las responsabilidades del entrenador es la selección de un método o estrategia de intervención que consiga que el jugador aprenda de la manera más eficaz posible. La totalidad de los modelos existentes comparten prácticamente los mismos puntos de partida cuando explican la intervención del entrenador/profesor. Aunque en algunos no se especifiquen explícitamente, estos elementos se podrían clasificar en los tres siguientes: tipo de comunicación, dise o de tareas y progresión de ense anza. Lo más destacable de cada modelo con respecto al cómo ense ar podría ser: de los modelos tradicionales sus técnicas para la automatización de algunos conocimientos, de los modelos estructuralistas su aportación al estudio de la lógica interna, del modelo comprensivo los juegos modificados para facilitar el aprendizaje, y del modelo constructivistas su reestructuración cognitiva mediante la reflexión.
Efectos de la información nutricional sobre la conducta de consumo de frutas y verduras en ni?os preescolares
De La Torre-Ibarra,Carolina; López-Espinoza,Antonio; Galindo,Alma; Aguilera,Virginia; Martínez,Alma Gabriela; Beltrán-Miranda,Claudia Patricia; Valdés,Elía; Cárdenas,Azucena;
Diversitas: Perspectivas en Psicología , 2008,
Abstract: this study evaluated effects of nutritional information about fruits and vegetables consumption. participants were 25 children between 3 and 5 years-old, which were exposed at high and low nutritional foods. subjects were divided in two groups (experimental and control) and exposed to four phases. experimental group received nutritional information about dietetic habits, nutritional facts and benefits of fruits and vegetables consumption. results showed that nutritional information modified the eating behaviour. non-nutritious food consumption diminished, but fruits and vegetables consumption not increased. data suggest that nutritional information modifies eating behaviour development in preschoolers, but is necessary a suitable duration and frequency with adequate reinforced in house through model of parents.
SEM-EDX STUDIES OF CHITOSAN DERIVATIVES-METAL ADDUCTS
Cárdenas,Galo; Taboada,Edelio; Bravo,Armando; Miranda,S. Patricia;
Journal of the Chilean Chemical Society , 2003, DOI: 10.4067/S0717-97072003000400008
Abstract: chitosan was obtained from shrimps shells (pleuroncodes monodon) using chemical methods. a series of chitosan (qs)charged with solution of copper, cobalt, nickel and mercury ions were prepared at room temperature using the batch method. n-3,5-diethylamino benzoyl chitosan (qdab); n,o-dimercapto succinate chitosan (qnot) and 4-aminobenzoate chitosan (qab) derivatives were prepared. the chitosan metal adducts with cu, co, ni and hg ions and derivatives maximum loading is discussed. chitosan and derivatives containing copper were analyzed by sem to find out the morphology of the polymers. chitosan-cu and derivatives charged, qdab-ni and qdab-hg were analyzed by edx to verify the presence of the metal in the polymeric chain
SEM-EDX STUDIES OF CHITOSAN DERIVATIVES-METAL ADDUCTS
Galo Cárdenas,Edelio Taboada,Armando Bravo,S. Patricia Miranda
Journal of the Chilean Chemical Society , 2003,
Abstract: Chitosan was obtained from shrimps shells (pleuroncodes monodon) using chemical methods. A series of chitosan (QS)charged with solution of copper, cobalt, nickel and mercury ions were prepared at room temperature using the batch method. N-3,5-diethylamino benzoyl chitosan (QDAB); N,O-dimercapto succinate chitosan (QNOT) and 4-aminobenzoate chitosan (QAB) derivatives were prepared. The chitosan metal adducts with Cu, Co, Ni and Hg ions and derivatives maximum loading is discussed. Chitosan and derivatives containing copper were analyzed by SEM to find out the morphology of the polymers. Chitosan-Cu and derivatives charged, QDAB-Ni and QDAB-Hg were analyzed by EDX to verify the presence of the metal in the polymeric chain
Escrutinio público de propuestas de candidatos durante la campa?a presidencial de 2006
López, Alejandro;Cárdenas, Enrique;
Política y gobierno , 2009,
Abstract: 2006 was the first election for president in mexico that took place under an administration that was not controlled by the pri, and these elections were characterized by a hard-fought competition and the strong presence of the candidates in mass media. three citizens' organizations, dialogues for mexico, citizens' magnifying glass, and evaluate and decide stood out because they tried to limit the tendency of the candidates and parties to exaggerate their electoral promises. the proposed initiatives of these groups included first, reducing the negative consequences of sloppy party platforms (improvisation); and second, offering information that would promote a more reasoned decision on the part of the voter by following through on the electoral promises so that they could answer questions such as, "are these solid proposals? did they improve?" the objective of this project is to allow citizens and political actors to evaluate the performance of elected officials in the next elections. because of this experience and by examining the initiatives to be able to influence general policies, these citizen-based groups were able to present suggestions for civic organizations to monitor more effectively representative institutions in mexico.
WATER VAPOR PERMEABILITY AND MECHANICAL PROPERTIES OF CHITOSAN COMPOSITE FILMS
Patricia Miranda,S.; Garnica,Omar; Lara-Sagahon,Virginia; Cárdenas,Galo;
Journal of the Chilean Chemical Society , 2004, DOI: 10.4067/S0717-97072004000200013
Abstract: chitosan films or membranes can be obtained by casting chitosan solutions in acetic acid at 1 % w/v concentration at room temperature. the films set were elaborated from 2% chitosan solutions mixed with three plasticizers (polyethylene glycol 200 (peg), sorbitol and glycerol) and two surfactants (tween 60 and tween 80) at two concentrations. the goal was to decrease the water vapor permeability and to improve the mechanical properties of chitosan films. the effects of plasticizers (peg, sorbitol and glycerol) and emulsifiers (tween 60 and tween 80) at two concentrations from chitosan solution on water vapor permeability and mechanical properties of cast films were evaluated. water vapor permeability ranged from 3.64 to 6.56 g mm / h m2 kpa., tension force from 7.23 to 48.3 mpa and elongation percentage from 22.9 to 167.02 were obtained. chitosan two percent with 0.3 % tween 80 produces films that showed the lowest permeability value. chitosan with 0.6 % glycerol has the highest percentaje of elongation, being 4.5 times higher than chitosan films. chitosan with 0.6% tween 80 improved the hydrophobicity of the chitosan film in 1.14 times. the highest value for tension force was found for chitosan with 0.6 % of tween 60. these values are similar to some polymers based on mineral oil
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