oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 7 )

2019 ( 227 )

2018 ( 365 )

2017 ( 381 )

Custom range...

Search Results: 1 - 10 of 209604 matches for " Acevedo López "
All listed articles are free for downloading (OA Articles)
Page 1 /209604
Display every page Item
La actitud de los profesores hacia el uso de las tecnologías de la información y comunicación
Mata de López,Alba Isabel; Acevedo Blanco,Ana Cecilia;
Investigación y Postgrado , 2010,
Abstract: este artículo analiza la actitud de los profesores del departamento de pedagogía del instituto pedagógico de miranda ?j.m. siso martínez? hacia el uso de las tecnologías de la información y comunicación en sus labores académicas utilizando el modelo multidimensional o de los tres componentes. como objetivo se planteó discriminar las respuestas cognitivas, afectivas y conductuales manifestadas por los profesores, como configuradoras de la actitud que asumen hacia el uso de las tecnologías de la información y comunicación. para tal fin, se realizó una investigación de dise?o no experimental de tipo transeccional de carácter descriptiva. la muestra estuvo conformada por veinticuatro profesores ordinarios del departamento de pedagogía. la tendencia actitudinal del grupo de profesores es positiva hacia el objeto de actitud; las respuestas de las dimensiones cognitivas, afectivas y conductuales como configuradoras de la actitud coinciden en dirección y sentido, es decir, aceptación del objeto de actitud.
Tumores hepáticos benignos Benign liver tumors
J. M. Pascasio Acevedo,B. Figueruela López
Revista Espa?ola de Enfermedades Digestivas , 2009,
Abstract:
Chemical study and anti-inflammatory activity of Capsicum chacoense and C. baccatum
Paula López,Susana Gorzalczany,Cristina Acevedo,Rosario Alonso
Revista Brasileira de Farmacognosia , 2012,
Abstract: Capsicum species, Solanaceae, have been used for centuries as food additives by populations of different regions of the world. Capsaicin (trans-methyl-N-vainillyl-nonenamide) is the main pungent compound extracted from the red hot pepper fruit (Capsicum spp.). The capsaicin content was determined by means of a HPLC method. The results showed that Capsicum chacoense Hunz., contains similar amounts of capsaicin (13.9 mg/100 g of dry fruit) in comparison with Capsicum baccatum L. (12.6 mg/100 g) and Capsicum annum L. (10.1 mg/100 g). Dichloromethane (CH2Cl2) and ethanol (EtOH) extracts of C. chacoense elicited a 46% and 38 % of inhibition on the arachidonic acid (AA) pathway in ear edema respectively while the CH2Cl2 and EtOH extracts of C. baccatum inhibited 52% and 35% the arachidonic acid response respectively.
EVALUACIóN SENSORIAL Y ANALíTICA DE LA CALIDAD DE ACEITE DE OLIVA EXTRAVIRGEN
Loyola López,Nelson; López Acevedo,Roberto; Acu?a Carrasco,Carlos;
Idesia (Arica) , 2008, DOI: 10.4067/S0718-34292008000200005
Abstract: the extra virgin olive oil is extracted mechanically from the olive fruit (olea europaea l.) by methods of maturation, beating and centrifugation, adding water with the purpose of facilitating the extraction of the oil contained in the pulp of the fruit, and it must have a smaller or equal acidity to 0.8% expressed in oleic acid and one smaller or equal organoleptic score to 6.5 points, thus conserving valuable poliphenolic compounds of the original fruit. that grants a great quality to it, in addition to an excellent taste and aroma, which are transmitted in its bitterness and sharpness. thus it is necessary to determine the quality of the national oil. the present study had the objective of evaluating the effect of the water addition in the elaboration process, on the quality of the finished product, making a chemical and sensorial evaluation. the test was made in the season 2004-2005 in the province of curicó, 7th region, chile. coupage or multivarietal oils were analyzed, coming from different varieties from olives. the evaluation treatments were: t0: 0% of water addition; t1: 20% of water addition; and t2: 30% of water addition. in the treatments t1 and t2, it had a better quality in relation to the control (t0). the treatment t2, with a global index of quality of 8.25 points, presented the best quality, given by a higher organoleptic punctuation and low chemical indexes; differing from treatment t0, that obtained a value of 6.34 points, based on the current regulation (ce n°1989/03, the regulation coi res-4/75- iv/96 and the national regulation nch107of2001 (inn, 2001)).
EVALUACIóN SENSORIAL Y ANALíTICA DE LA CALIDAD DE ACEITE DE OLIVA EXTRAVIRGEN SENSORIAL AND ANALYTICAL EVALUATION OF THE EXTRA-VIRGIN OIL QUALITY
Nelson Loyola López,Roberto López Acevedo,Carlos Acu?a Carrasco
IDESIA , 2008,
Abstract: El aceite de oliva extravirgen es extraído mecánicamente del fruto del Olivo (Olea europaea L.), por métodos de molturación, batido y centrifugación, agregando agua con la finalidad de facilitar la extracción del aceite contenido en la pulpa del fruto, y debe tener una acidez menor o igual al 0,8% expresada en ácido oleico y una puntuación organoléptica menor o igual a 6,5 puntos, conservando así valiosos compuestos polifenólicos del fruto originario, y que le otorga una gran calidad, además de un excelente gusto y aroma, los que se traducen en su amargor y picor, por lo cual es necesario determinar la calidad del aceite nacional. El presente estudio tuvo como objetivo evaluar el efecto de la adición de agua en el proceso de elaboración, sobre la calidad del producto terminado, realizando una evaluación química y sensorial. El ensayo se realizó en la temporada 2004-2005 en la provincia de Curicó, VII Región, Chile. Se analizaron aceites "coupages o multivarietales", procedentes de diferentes variedades de olivas. Los tratamientos evaluados fueron: T0: 0% de adición de agua; T1: 20% de adición de agua; y T2: 30% de adición de agua. En los tratamientos T1 y T2 existió una mejor calidad respecto al testigo (T0). El tratamiento T2, con un índice global de calidad de 8,25 puntos, presentó la mejor calidad, dado por su mayor puntuación organoléptica y bajos índices químicos, a diferencia del tratamiento T0, que obtuvo un valor de 6,34 puntos, basándose en la reglamentación vigente (CE No 1989/03, la norma COI Res-4/75-IV/96 y la norma NCh107of2001 (INN, 2001)). The extra virgin olive oil is extracted mechanically from the olive fruit (Olea europaea L.) by methods of maturation, beating and centrifugation, adding water with the purpose of facilitating the extraction of the oil contained in the pulp of the fruit, and it must have a smaller or equal acidity to 0.8% expressed in oleic acid and one smaller or equal organoleptic score to 6.5 points, thus conserving valuable poliphenolic compounds of the original fruit. That grants a great quality to it, in addition to an excellent taste and aroma, which are transmitted in its bitterness and sharpness. Thus it is necessary to determine the quality of the national oil. The present study had the objective of evaluating the effect of the water addition in the elaboration process, on the quality of the finished product, making a chemical and sensorial evaluation. The test was made in the season 2004-2005 in the province of Curicó, 7th Region, Chile. Coupage or multivarietal oils were analyzed, coming from different vari
Cristalización de criolita a partir de un fundido: Rasgos macroscópicos y estructurales
López-Acevedo, M. V.,Benjouali, M.,López Andrés, S.
Boletín de la Sociedad Espa?ola de Cerámica y Vidrio , 2001,
Abstract: Overcooling of a cryolite (Na3AlF6) melt gave rise to a granular aggregate. This aggregate can be regarded as the result of a process of homogeneous primary nucleation. Due to the crystallization pressure exerted by the cryolite during cooling, the grains are progressively embedded by a matrix constituted by the contaminant elements (e.g., Si) of the system. Abundant polysinthetic twins are here interpreted as an experimental evidence of processes related to the ferroelastic transition, that took place during cooling. Al sobreenfriar un fundido de criolita (Na3AlF6) se ha obtenido un agregado granular de ésta que se interpreta como un fenómeno de nucleación homogénea primaria. Los granos están cementados por una matriz en la que se concentran los elementos contaminantes del sistema (ej. Si), debido a la presión de cristalización que ejerce la criolita durante su desarrollo. Las maclas polisintéticas que abundan en los diferentes granos se interpretan como una evidencia experimental de la transición ferroelástica que tiene lugar al disminuir la temperatura en el transcurso del proceso.
ACTIVIDAD DE LA GLUTATIóN REDUCTASA EN EL EMBARAZO DIABéTICO
Acevedo L,Carlos; López A,Fanny; Sepúlveda B,Silvia; Espinosa F,Victoria;
Revista chilena de obstetricia y ginecología , 2007, DOI: 10.4067/S0717-75262007000200003
Abstract: background: the prevalence of the gestational diabetes is increasing in our population and its effects in the cellular metabolism and oxidative status had been studied. objective: determine if exists a relationship between the erythrocyte glutathione reductase activity evaluated by egrac test and the gestational diabetes. methods: this traversal study of cases and controls, included at 30 pregnant with diagnostic of gestational diabetes and 30 without associate pathologies, belonging to the maternity of the hospital barros luco-trudeau, santiago-chile. the activity of the glutathione reductase was determined by spectrophotometric assay through the egrac test, and their values were related with maternal variables as: age, hematocrite, presence of antecedents of family illnesses, maternal nutritional status and the body mass index. to compare the variables between both groups, they were carried out measures of disparity, position and analysis of the correlation. results: we determine that the group of diabetic mothers was older, with higher body mass index and a bigger frequency of antecedents of gestational diabetes that the control group, although without significant difference. the prevalence of anemia and the answer to the supplement with fad in the activity of the glutathione reductase was similar among the groups. on the other hand, the incidence of familiar diabetes in the group control was bigger. the distribution of the values of egrac, also used as an indicator of the riboflavin levels, showed in the group of cases half risk to high of malnutrition, while in the group control the tendency was normal or low risk. conclusion: we can conclude that the gestational diabetics pregnant presented malnutrition and higher oxidative stress that the control group, evidenced by means of the egrac test
ACTIVIDAD DE LA GLUTATIóN REDUCTASA EN EL EMBARAZO DIABéTICO
Carlos Acevedo L,Fanny López A,Silvia Sepúlveda B,Victoria Espinosa F
Revista Chilena de Obstetricia y Ginecología , 2007,
Abstract: Antecedentes: El predominio de la diabetes gestacional está aumentando en nuestra población y sus efectos en el metabolismo celular y estatus oxidativo están siendo estudiados. Objetivo: Determinar si existe una relación entre la actividad de la glutatión reductasa eritrocitaria, evaluada a través del test CAGRE y la diabetes gestacional. Método: Estudio transversal de casos y controles, incluyó a 30 embarazadas con diagnóstico de diabetes gestacional y 30 sin patologías asociadas, pertenecientes a la Maternidad del Hospital Barros Luco-Trudeau, Santiago de Chile. La actividad de la glutatión reductasa de eritrocitos fue determinada espectrofotométricamente a través del test CAGRE, la que fue relacionada con variables maternas como: edad, hematocrito, presencia de antecedentes de enfermedades familiares, estado nutricional materno e índice de masa corporal. Para comparar las variables entre ambos grupos, se realizaron medidas de disparidad, posición y análisis de la correlación. Resultados: El grupo de madres diabéticas presentó edad materna, índice de masa de corporal y antecedentes de diabetes gestacional mayores que el grupo control, aunque sin diferencia estadísticamente significativa. El predominio de anemia y la respuesta al suplemento del cofactor FAD en la actividad de la glutatión reductasa eritrocitaria fue similar entre los grupos. La mayor incidencia de diabetes familiar en el grupo control fue estadísticamente significativa. La distribución de los valores de CAGRE, utilizado también como un indicador de los niveles de riboflavina, mostró en el grupo de casos riesgo medio a alto de malnutrición, mientras que en el grupo control la tendencia fue normal o de riesgo bajo. Conclusión: Las embarazadas diabéticas gestacionales, presentaron mal nutrición y un estrés oxidativo mayor que el grupo control, evidenciado por el test de CAGRE Background: The prevalence of the gestational diabetes is increasing in our population and its effects in the cellular metabolism and oxidative status had been studied. Objective: Determine if exists a relationship between the erythrocyte glutathione reductase activity evaluated by EGRAC test and the gestational diabetes. Methods: This traversal study of cases and controls, included at 30 pregnant with diagnostic of gestational diabetes and 30 without associate pathologies, belonging to the Maternity of the Hospital Barros Luco-Trudeau, Santiago-Chile. The activity of the glutathione reductase was determined by spectrophotometric assay through the EGRAC test, and their values were related with maternal variables as: a
Convergencias conceptuales entre las teorías del aprendizaje implícito y la Psicología Evolucionista
López-Ramón,María Fernanda; Fernández Acevedo,Gustavo;
Interdisciplinaria , 2007,
Abstract: throughout the years, a wide range of systems, trends, schools of thought and paradigms have fought to become researchers' and professionals' number one field of study. in psychology, however, competing has only produced noticeable theoretic dispersion. the aim of the present article is to contribute to the discussion on theoretical integration by analyzing conceptual convergences between two widely circulating perspectives that are also under current development: the theories of implicit learning (il) and a research program known as evolutionary psychology (ep). both theories have gradually gained increasing importance among current theory trends. the theories of implicit learning, on one hand, have evolved based on empirical data and have revealed their presence in different experimental paradigms and among diverse populations. on the other hand, over the past few years ep has achieved considerable relevance in the theoretic framework, and has provided evolutionary explanations about a great deal of psychological phenomena. in the first two sections we briefly describe the general characteristics of il and ep, in order to later analyze possible convergences between both perspectives. firstly, we show the main conceptual principles of il based on the analysis made by frensch who classifies the main existing definitions according to different topics: the stimuli that are involved in the acquisition context, the phenomenological character of the process, the structure complexity of implicit learning content, the existing relationship between il and neural mechanisms that are different from those in explicit learning, and the functional relationship between il and attention mechanisms. in the second section, we identify three main theoretical aspects of evolutionary psychology: the adjustment assumption (according to which mental systems have emerged basically as features that contribute to an organism's successful reproduction); computational modularity hypothesis (t
Impacto del tipo de uso de la tierra sobre propiedades del suelo en la depresión de Quíbor
Torres,Duilio; Aparicio,Milagros; López,Marisol; Contreras,Jorge; Acevedo,Ingrid;
Agronomía Tropical , 2009,
Abstract: in order to evaluate the effects on land use on soils chemical, physical and biological parameters of chaimare and quibor soils series of lara state, altered, no-altered and rizhospheric soils samples were collected in some land use such as: tut-avocado, tut onion (conventional management), tut-pawpaw, tut-coriander, and tut sweet maize under organic fertilizer and tut- onion (under organic fertilizer). chemical and physical properties were evaluated in all land uses to determined relationship between soil quality with the abundance of free-living organisms with the potential to fix atmospheric nitrogen (flfn) and solubilize phosphorus (sp). results showed that the number of colonies flfn and sp was greater in the quibor series where they predominate and management with organic fertilizer in comparison to the chaimare series, also the type of land management affected most to the flfn that the sp, since that the number of colonies and selected strain were always greater for this type of bacteria in all land uses. the uses with organic fertilizer (sweet maize, pawpaw and onion), showed better soil physical conditions, and organic matter increase, were those that presented higher number of flfn and sp
Page 1 /209604
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.