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Search Results: 1 - 10 of 212355 matches for " Marcela; Páez "
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Efectos de una campa a educativa sobre frijoles en un grupo de mujeres
Marcela Dumani,Paola Páez
Agronomía Mesoamericana , 2004,
Abstract: Efectos de una Campa a educativa sobre frijoles en un grupo de mujeres. Se presentan los efectos de una Campa a educativa sobre frijoles en un grupo de mujeres de clase media, madres de escolares; que constituyeron el grupo objetivo de la mencionada Campa a. Estas madres presentaban la particularidad de que sus hijos e hijas escolares, también habían sido expuestos (as) a la Campa a. Los escolares constituían el grupo interactivo , ya que por su estrecho contacto con las madres, podían ser un medio de comunicación y de refuerzo de los mensajes dirigidos a ellas. Los efectos se valoraron con respecto a los conocimientos, actitudes y prácticas de las madres en relación con los frijoles; confrontando lo encontrado con los indicadores de éxito planteados para la Campa a. Además, para algunas de las prácticas, fue posible establecer comparaciones cuantitativas con los datos obtenidos en el diagnóstico inicial. Los resultados revelaron efectos positivos de la Campa a en las mujeres. Se comprobó un incremento importante en la frecuencia del consumo de frijoles, una actitud positiva ante los mismos y un mejoramiento de las prácticas de preparación, consumo y conservación del producto.
Emociones como Predictores del Perdón en el Contexto de la Violación a los Derechos Humanos en Chile
Cárdenas,Manuel; Ascorra,Paula; San Martín,Marcela; Rodríguez,Marcela; Páez,Darío;
Psicoperspectivas , 2013, DOI: 10.5027/psicoperspectivas-Vol12-Issue1-fulltext-241
Abstract: data was taken from a sample of people that were/were not affected by political violence in chile (n=1267) in order to study the predictive ability of emotions on beliefs about forgiveness. the multiple regression analysis conducted indicates that the effect of assessed emotions, even if statistically significant, is of little relevance for the general sample (r2=0.05). with direct victims the regression coefficient was higher than for the other groups (r2=0.11), emotions that are the top contributors to the explanation are wrath (b=-30), pain (b=0.26) and hope (b=0.20), predict that lower levels of wrath and higher levels of pain and hope, will increase the level of agreement in victims of political violence to forgive those that hurt them in the past.
Ecología reproductiva y cacería de la tortuga Trachemys scripta (Testudinata: Emydidae), en el área de la Depresión Momposina, norte de Colombia
Bernal Múnera,Marcela; Daza R.,Juan Manuel; P. Páez,Vivian;
Revista de Biología Tropical , 2004,
Abstract: we studied the reproductive ecology of the slider turtle, trachemys scripta callirostris, during the reproductive season of the year 2000, in an area of the mompós depression, northern colombia. we examined the number of nests ovoposited in locations with different characteristics, their hatching success rates and the natural causes of egg mortality. we also determined the effects of exploitation of nesting females, in two populations with different levels of harvesting. the results showed that the majority of nests were laid along bodies of water, in the first 20 m of the shoreline, in sites with substrates of moderate humidity, sand and clayish texture, covered by creeping vegetation. invertebrates produced the greatest mortality in the nests. hatching success was high, compared to other reports for this species. only in the site with the highest hunting pressure, a negative correlation was found, between the harvest rate and the time elapsed since the start of the nesting period, suggesting that the excessive extraction decreased the number of nesting females. also, the females from the highly exploited site were significantly smaller than those from the less exploited site. the females, neonates and nests of the entire area, exhibited sizes below that reported for other tropical populations of the genus. the continued hunting pressure in northern colombia, appears to be a factor that has altered the structure and population dynamics of t. scripta callirostris
Ecología reproductiva y cacería de la tortuga Trachemys scripta (Testudinata: Emydidae), en el área de la Depresión Momposina, norte de Colombia
Marcela Bernal Múnera,Juan Manuel Daza R.,Vivian P. Páez
Revista de Biología Tropical , 2004,
Abstract: Se estudió la ecología reproductiva de la tortuga icotea, Trachemys scripta callirostris, durante la estación reproductiva del 2000, en una localidad de la Depresión Momposina, al norte de Colombia. Se examinó el número de nidos en áreas con características diferentes, el éxito de eclosión y las causas de mortalidad natural de los huevos. Se determinó el efecto de la explotación sobre las poblaciones de hembras anidantes en dos localidades con diferentes tasas de cacería. Los resultados mostraron que la mayor cantidad de nidos se encontraron entre los primeros 20 m, a partir de la orilla de los cuerpos de agua, en sitios con sustratos de humedad moderada y textura limoso-arenosa, cubiertos con vegetación rastrera. Los invertebrados produjeron la mayor mortalidad en las nidadas. El éxito de eclosión de la población estudiada fue mayor en comparación con otros informes de la misma especie. En el sitio que presenta mayor presión de caza se encontró una correlación negativa entre la tasa de cacería y los días transcurridos desde el inicio de la temporada de anidación, lo que probablemente se deba a que la extracción excesiva disminuye la cantidad de hembras anidantes hacia el fin de la temporada. Las hembras del sitio con mayor explotación, presentaron una talla significativamente menor con relación a las del sitio con menor caza. Las hembras, neonatos y nidadas de toda la zona, mostraron menor tama o que las de otras poblaciones tropicales del mismo género. La prolongada presión de caza en el norte de Colombia parece ser un factor de alteración de la estructura y la dinámica poblacional de T. scripta callirostris We studied the reproductive ecology of the slider turtle, Trachemys scripta callirostris, during the reproductive season of the year 2000, in an area of the Mompós Depression, northern Colombia. We examined the number of nests ovoposited in locations with different characteristics, their hatching success rates and the natural causes of egg mortality. We also determined the effects of exploitation of nesting females, in two populations with different levels of harvesting. The results showed that the majority of nests were laid along bodies of water, in the first 20 m of the shoreline, in sites with substrates of moderate humidity, sand and clayish texture, covered by creeping vegetation. Invertebrates produced the greatest mortality in the nests. Hatching success was high, compared to other reports for this species. Only in the site with the highest hunting pressure, a negative correlation was found, between the harvest rate and the time elapsed si
Uso de métodos químicos para sintetizar nanopartículas de SnO2 -TiO2
Montenegro Hernández,Alejandra; Cerón,Nathalie Marcela; Rodríguez Páez,Jorge Enrique;
Revista Facultad de Ingeniería Universidad de Antioquia , 2008,
Abstract: in this work, chemical routes were used to synthesize sno2 -tio2 ceramic powders: precipitation and polymeric precursor (pechini) methods. the ceramics powders were characterized by differential thermal and thermal gravimetric analysis (dta/tga), fourier transform infrared spectroscopy (ft-ir), x ray diffraction (xrd) and scanning electron microscopy (sem) and transmission electron microscopy (tem). the synthesized ceramic powders presented nanometric sized and high chemical purity.
Dermatomiositis refractaria asociada a neumonía en organización tratada con rituximab: Reporte de un caso
Yá?ez V,Jorge; Cisternas M,Marcela; Saldías H,Velia; Saldías P,Fernando;
Revista médica de Chile , 2009, DOI: 10.4067/S0034-98872009000100013
Abstract: chronic organizing pneumonia (cop) has often been reported as a pulmonary manifestation of collagen vascular diseases, mainly rheumatoid arhritis, but the association of cop and dermatomyositis (dm) has rarely been documented. we report a 55 year-old woman with well-documented dm and a cop. she was refractory to steroids and two other immunosuppressive agents therapy (cyclophosphamide and azathioprine). therefore, rituximab (2 x 1 g infusions) was used for treatment. during the following weeks her strength gradually increased while creatine kinase (ck), c reactive protein and erythrocyte sedimentation rate normalized. after 6 months, she had a relapse with increased muscle enzymes, fever and modérate muscle weakness. after a second course of rituximab (2 x 1 g infusions), the patient demonstrated a remarkable clinical response as indicated by an increase in muscle strength and moderate decline in creatine kinase levels. lung abnormalities resolved significantly on high resolution chest ct sean. thus, b-cell depletion therapy with rituximab used alone or in combination with other immunosuppressants may be a viable option in patients with polymyositis-dermatomyositis and pneumonia refractory to current therapies.
Enfermedad de Moyamoya, a propósito de dos casos Moyamoya disease, 2 case-report
LETICIA Yá?EZ P,MARCELA PAREDES M,MICHELANGELO LAPADULA A,PATRICIO MARTíNEZ T
Revista chilena de pediatría , 2008,
Abstract: La enfermedad de Moyamoya es una enfermedad cerebrovascular oclusiva, progresiva de ambas arterias carótidas internas o sus ramas, compensada por el desarrollo de una fina red vascular colateral. Su etiología es desconocida, aunque distintos estudios han asociado su patogénesis a factores genéticos y ambientales. En Pediatría se manifiesta generalmente como crisis isquémicas transitorias o infartos cerebrales, mientras que en adultos es más frecuente la hemorragia cerebral1,2. En países donde es más frecuente, como Japón, se ha logrado hacer un diagnóstico precoz en pacientes aún asintomáticos, gracias al desarrollo de la Resonancia magnética con angiogra a cerebral2. La cirugía de revascularización lograría reducir la incidencia de nuevos episodios isquémicos y mejorar el pronóstico a largo plazo de los pacientes que padecen esta patología3. Presentamos a continuación dos casos que han llegado a nuestro centro en un período de 9 a os. Moyamoya Disease is a progressive occlusive cerebrovascular disease of both internal carotid arteries and their branches, with compensatory development of a fine collateral vascular network. The etiology of the disease is unknown; however, several studies have suggested involvement of genetic and environmental factors in its pathogenesis. In children, it causes transient ischemic attacks and cerebral infarction, while bleeding is more frequent in adults. In Japan, where the disease is most frequently observed, the development of magnetic resonance with angiography has allowed diagnosis in asymptomatic Moyamoya Disease. Revascularization surgery is believed to reduce the incidence of new ischemic events and improve long term prognosis in these patients. We present 2 children with Moyamoya Disease treated in our Chmc between 1998 and 2007.
Dermatomiositis refractaria asociada a neumonía en organización tratada con rituximab: Reporte de un caso Refractory dermatomyositis associated with chronic organizing pneumonia treated with rituximab: Report of one case
Jorge Yá?ez V,Marcela Cisternas M,Velia Saldías H,Fernando Saldías P
Revista médica de Chile , 2009,
Abstract: Chronic organizing pneumonia (COP) has often been reported as a pulmonary manifestation of collagen vascular diseases, mainly rheumatoid arhritis, but the association of COP and dermatomyositis (DM) has rarely been documented. We report a 55 year-old woman with well-documented DM and a COP. She was refractory to steroids and two other immunosuppressive agents therapy (cyclophosphamide and azathioprine). Therefore, rituximab (2 x 1 g infusions) was used for treatment. During the following weeks her strength gradually increased while creatine kinase (CK), C reactive protein and erythrocyte sedimentation rate normalized. After 6 months, she had a relapse with increased muscle enzymes, fever and modérate muscle weakness. After a second course of rituximab (2 x 1 g infusions), the patient demonstrated a remarkable clinical response as indicated by an increase in muscle strength and moderate decline in creatine kinase levels. Lung abnormalities resolved significantly on high resolution chest CT sean. Thus, B-cell depletion therapy with rituximab used alone or in combination with other immunosuppressants may be a viable option in patients with polymyositis-dermatomyositis and pneumonia refractory to current therapies.
Applicative Study (Part I): The Excellent Conditions to Remove in Batch Direct Textile Dyes (Direct Red, Direct Blue and Direct Yellow) from Aqueous Solutions by Adsorption Processes on Low-Cost Chitosan Films under Different Conditions  [PDF]
Vito Rizzi, Alessandra Longo, Paola Fini, Paola Semeraro, Pinalysa Cosma, Esther Franco, Rocío García, Marcela Ferrándiz, Estrella Nú?ez, José Antonio Gabaldón, Isabel Fortea, Enrique Pérez, Miguel Ferrándiz
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.44048
Abstract: In recent years the development of chitosan (CH) based materials as useful adsorbent polymeric matrices is an expanding field in the area of adsorption science. Even though CH has been successfully used for dye removal from aqueous solutions due to its low cost, no considerations have been made about, for example, the effect of changing the pH of chitosan hydrogelor about the dehydrating effect of Ethanol (EtOH) treatment of chitosan film on the dyes removal from water. Consequently in our laboratory we carried out a study focusing the attention, mainly, on the potential use of CH films under different conditions, such as reducing the intrinsic pH, increasing the hydrophobic character by means of ethanol treatment and neutralization of CH films to improve their absorption power. Textile anionic dyes named Direct Red 83:1, Direct Yellow 86 and Direct Blue 78 have been studied with the aim of reducing the contact time of CH film in waste water improving the bleaching efficiency. Neutralized acid CH film and longtime dehydrated one result to be the better films in dye removal from water. Also the reduction of the CH solution acidity during the film preparation determines the decreasing of the contact time improving the results. The effect of initial dye concentration has been examined and the amount of dye adsorption in function of time t, qt (mg/cm2), for each analyzed film has been evaluated comparing the long term effect with the decoloration rate. A linear form of pseudo-first-order Lagergren model has been used and described. The best condition for removing all examined dyes from various dye solutions appears to be the dehydration of a novel projected CH film obtained by means of the film immersion in EtOH for 4 days. Also CH films prepared by well-known literature procedure and neutralized with NaOH treatment appear having an excellent behavior, however the film treatment requires a large quantity of water and time.
Repercusión del estado nutricional en el desarrollo dentario y esqueletal de escolares de tucumán, argentina: A?o 2004
Páez,Rafael G; Erbiti,Susana; Navarro,Abelardo; Romero,Susana; D`Urso,Marcela; Delgado,Ana María;
Acta Odontológica Venezolana , 2008,
Abstract: the objective was to determine children nutritional status and to associate chronological age to the skeletal and dental maduration status. in order to determine nutritional status of students, it was used a table for normal growing and development of weight and height for argentine children (lejarraga, 1977). skeletal madurative state was obtained using a wrist radiography which were compared with others included in the atlas of skeletal development of the hand and wrist of greulich and pyle. dental age was determined using dental radiograph of lower canine and compared with standards in the table of dental development stages of haaviko no significant difference was found between chronological, dental and skeletal age between groups. anova p=0,76; p=0,17; p=0,50 respectively. for this population, skeletal age of malnourished children is significativelly lower than chronological age. for eutrophic children, dental age appeared significativelly lower than chronological age.
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