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Search Results: 1 - 10 of 116932 matches for " Diana Rocío; Builes Felizzola "
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Evaluación de la eficiencia de una batería de filtros empacados en zeolita en la remoción de metales pesados presentes en un licor mixto bajo condiciones de laboratorio
Acevedo Cifuentes,Diana Rocío; Builes Felizzola,Sandra Milena; Ordó?ez Ante,Carlos Andrés; López Sánchez,Idalia Jacqueline;
Revista Ingenierías Universidad de Medellín , 2011,
Abstract: this article shows the research results on the removal of five heavy metals (lead, nickel, chromium, cadmium and mercury) present in a liquor made of a mixture of wastewater from san fernando wastewater treatment plant and a solution prepared with known concentrations of heavy metals, using a series of batery filters packed with zeolita clinoptilolita. the experiments were run under controlled conditions of flow and ph, at room temperature. it was found that the removal efficiency was significantly high under the specified design conditions; also, it was found an important removal of the contaminants after passing through the filters, independently of the initial concentration, with the highest observed removal for mercury.
REMOCIóN DE MICROORGANISMOS PATóGENOS PRESENTES EN UN LICOR MIXTO BAJO CONDICIONES DE LABORATORIO EMPLEANDO FILTROS EMPACADOS EN ZEOLITA NATURAL REMOVAL OF PATHOGENIC MICROORGANISMS PRESENT IN MIXED LIQUOUR UNDER LABORATORY CONDITIONS BY USING FILTERS PACKED IN NATURAL ZEOLITE
Diana Rocío Acevedo Cifuentes,Sandra Milena Builes Felizzola,Carlos Andrés Ordo?ez Ante,Idalia Jacqueline López Sánchez
Revista Ingenierías Universidad de Medellín , 2012,
Abstract: En este artículo, se presentan los resultados obtenidos en la remoción de coliformes totales, coliformes fecales y salmonella-shigella, presentes en un licor mixto proveniente de la planta de tratamiento de aguas residuales San Fernando (Medellín, Colombia), mediante el uso de una batería de filtros empacados en zeolita clinoptilolita. La experimentación se desarrolló bajo condiciones controladas de caudal y pH, a temperatura ambiente. Se empleó zeolita natural tipo clinoptilolita la cual se activó con solución salina y secado, se empacó en una batería compuesta por dos filtros, uno de flujo descendente y otro de flujo ascendente, para facilitar el contacto de la solución contaminada y el material adsorbente (zeolita). Se realizaron cinco ensayos independientes y al final de cada uno de ellos se lavó y se activó el material zeolítico antes de comenzar el siguiente. En cada ensayo se tomaron tres muestras. Se encontró que la eficiencia de los filtros bajo las condiciones específicas de dise o fue significativamente alta en la remoción de los patógenos evaluados, y el porcentaje de remoción fue independiente del valor de la concentración a la entrada del filtro. Además, la eficiencia en la remoción de los patógenos evaluados no dependió del tipo de microorganismo. This article displays results obtained when total coliforms, fecal coliforms, and Salmonella shigella were removed from mixed liquor taken from San Fernando waste water treatment plant in Medellín, Colombia, by using a battery of filters packed in zeolite clinoptilolite. Experiments were developed under controlled conditions of flow and pH at room temperature. Natural clinoptilolite-type zeolite was used activated with saline solution and drying; it was packed in a battery consisting of two filters (a downward-flow filter and an upward-flow filter) in order to make contact of contaminated solution and adsorbent material (zeolite) easier. Five independent tests were conducted and zeolite matter was washed and activated at the end of each test before starting the next one. Three samples were taken in each test. It was found that efficiency of filters under specific conditions of design was significantly high when assessed pathogens were removed, and percentage of removal was independent from the concentration value at the filter entry. Besides, efficiency to remove pathogens assessed was not dependent on the type of microorganisms.
Evaluación de la eficiencia de una batería de filtros empacados en zeolita en la remoción de metales pesados presentes en un licor mixto bajo condiciones de laboratorio Evaluation of efficiency of a filter battery packaging zeolite in the removal of heavy metals in a mixed liquor under laboratory conditions
Diana Rocío Acevedo Cifuentes,Sandra Milena Builes Felizzola,Carlos Andrés Ordó?ez Ante,Idalia Jacqueline López Sánchez
Revista Ingenierías Universidad de Medellín , 2011,
Abstract: En este artículo se muestran resultados de investigación obtenidos en la remoción de los metales pesados, plomo, níquel, cromo, cadmio y mercurio, presentes en una solución compuesta por licor mixto proveniente de la planta de tratamiento de aguas residuales de San Fernando y una solución preparada con metales pesados con una concentración conocida, mediante el uso de una batería de filtros empacados en zeolita clinoptilolita. La experimentación se desarrolló bajo condiciones controladas de caudal y pH, a temperatura ambiente. Se encontró que la eficiencia de los filtros bajo las condiciones específicas de dise o es significativamente alta en la remoción de los metales pesados evaluados en la solución acuosa. Se encontró, además, que sin importar el valor de la concentración inicial, se obtuvo una remoción importante en los contaminantes luego de pasar por los filtros con una mayor eficiencia en la remoción del mercurio. This article shows the research results on the removal of five heavy metals (lead, nickel, chromium, cadmium and mercury) present in a liquor made of a mixture of wastewater from San Fernando wastewater treatment plant and a solution prepared with known concentrations of heavy metals, using a series of batery filters packed with zeolita clinoptilolita. The experiments were run under controlled conditions of flow and pH, at room temperature. It was found that the removal efficiency was significantly high under the specified design conditions; also, it was found an important removal of the contaminants after passing through the filters, independently of the initial concentration, with the highest observed removal for mercury.
Hepatic angiosarcoma presenting as acute liver failure in young adults. Report of two cases and review of literature  [PDF]
Rocío López, Diana Castro-Villabón, Johanna álvarez, Alonso Vera, Rafael Andrade
Case Reports in Clinical Medicine (CRCM) , 2013, DOI: 10.4236/crcm.2013.28115
Abstract: Background: Hepatic angiosarcoma is a rare tumor of endothelial origin that accounts for up to 2% of all primary neoplasms of the liver. It is uncommon in young adults and acute liver failure is a very unusual presentation of this disease. Case Presentation: We report the cases of two young male adults who presented with acute liver failure. One of them was diagnosed with primary hepatic angiosarcoma after transplantation based on the complete evaluation of the heaptectomy specimen; while the other was diagnosed through a liver biopsy which was done as part of the work-up for transplantation. Both patients had a rapidly worsening clinical course and died within 2 months of diagnosis. Conclusion: Hepatic angiosarcoma is a poor prognosis disease with high and early mortality. Therefore, a high level of suspicion should be present to promptly diagnose it, especially when dealing with patients with a rapidly worsening liver disease.
Melanoma involving the ileum: Report of a case and review of literature  [PDF]
Diana Castro-Villabón, Iván Mojica, Rocío López, Paula Esquinas, Alfredo García, Paula A. Rodríguez-Urrego
Case Reports in Clinical Medicine (CRCM) , 2014, DOI: 10.4236/crcm.2014.31011
Abstract:

Malignant melanoma accounts for less than 3% of all gastrointestinal tract malignancies, and it is mainly metastatic in origin. In contrast, primary melanoma of the small bowel is an extremely rare entity. We report the case of a 34-year-old male who was diagnosed with melanoma involving the ileum most likely secondary in origin. Histologically, the neoplastic cells involved the entire wall thickness, showed nuclear pleomorphism, nuclear pseudoinclusions, abundant eosinophilic cytoplasm, and were immunoreactive for S100, HMB45, and Melan-A. Electron microscopy showed electron-dense complexes that suggested aggregates of melanin. The final diagnosis was given based on the clinical, radiologic and histopathologic correlation. This case demonstrates the need of clinical and histological immunohistochemistry, electron microscopy and molecular studies together to make a correct diagnosis of spindle cell and epithelioid tumors of the gastrointestinal tract.

Current situation of Leishmania infantum infection in shelter dogs in northern Spain
Guadalupe Miró, Rocío Checa, Ana Montoya, Leticia Hernández, Diana Dado, Rosa Gálvez
Parasites & Vectors , 2012, DOI: 10.1186/1756-3305-5-60
Abstract: Over the year 2011 a cross-sectional study was conducted on a total of 418 stray dogs. A preliminary entomological survey was carried out using CDC-light traps. The chi-squared test was used to examine relationships between L. infantum seroprevalence and the remaining variables.The overall seroprevalence of L. infantum infection detected was 3% in the Cantabrian coast. In Orense the seroprevalence was 35.6%. In this latter region, the presence of sand fly, Phlebotomus perniciosus was also detected.In general, seropositivity for L. infantum was related to size (large breed dogs versus small) and age, with a significantly higher seroprevalence recorded in younger (0-3 years) and older dogs (> 7 years) than adult dogs. Clinical signs of CanL were observed in 41.3% of the seropositive dogs. The seropositivity for L. infantum infection associated with the presence of clinical signs and/or abnormal laboratory findings shows a prevalence of 4.5%.Our data provide new insight into the prevalence of CanL across northern Spain. The situation observed in Orense seems to be worsening compared to the few reports available, with figures being similar to those cited for known endemic areas of Spain. Besides, the presence of P. perniciosus in Orense points out to a risk of the spread of this zoonotic disease in this geographical area. These findings identify a need for an active search for the sand fly vectors of L. infantum across the entire northern spanish region including the rest of Galicia, Asturias, Cantabria and the Basque Country.Canine leishmaniosis (CanL) is a widespread endemic disease in the Mediterranean basin. Its primary causative agent, Leishmania infantum, is transmitted to humans and animals by blood-sucking phlebotomine sand flies [1]. Dogs are the main domestic reservoir for human infection by L. infantum [2] .A risk of the introduction of L. infantum infection in northern Europe is supported by the idea that changing factors linked to climate and environment co
El lado oscuro de la sinusitis Presentación de un caso con complicación cerebral
Gil,Diana Rocío; González,Jairo; Martínez,Humberto; Camargo,Juan Pablo;
Acta Medica Colombiana , 2010,
Abstract: orbital cellulitis is a rare and potentially fatal condition associated with ocular trauma or upper respiratory tract infections, especially sinusitis. associated complications include central nervous system involvement including meningitis, cavernous sinus thrombosis and abscess formation which occurs most frequently in children and adolescents. we report the case of a 20 year old man with cerebral empyema as a complication, denoting the importance of computed tomography and the value of appropriate antibiotic therapy and early surgical management, since the results were satisfactory due to the absence of sequelae (acta med colomb 2010; 35:135-138).
La Orientación Vocacional en las escuelas argentinas: Necesidad de políticas públicas y de nuevas prácticas de orientación
Aisenson,Diana; Cortada de Kohan,Nuria; Siniuk,Diego; Rivarola,Rocío; Schwarcz,Johanna; Virgili,Natalia;
Anuario de investigaciones , 2009,
Abstract: in this paper, the final results of the evaluation of guidance services in high schools are presented for the first time, the data given obtained in research on vocational guidance in argentina (1999-2003), involving the participation of teams from nine national universities. results obtained, which were processed during 2008, show that guidance services in schools are precarious and have many problems. these include the lacks of macro institutional policies in the field; counselors with adequate expertise; material and technical resources, and inadequate networking among relevant organizations. these data are the basic component of the research project entitled "education for guidance and the projects and personal identity constructions of young people" (p054, ubacyt 2008-2010), whose objective is to evaluate the guidance strategies and methods that are used in two services of the university of buenos aires.
Seguimiento de los estudiantes que participaron en un programa de orientación vocacional en grupo
Aisenson,Diana; Virgili,Natalia; Rivarola,Rocío; Rivero,Lorena; Polastri,Graciela; Siniuk,Diego; Scharwcz,Johanna;
Anuario de investigaciones , 2010,
Abstract: in the framework of research on "education for guidance: projects and identity construction of secondary school students" (ubacyt 2008-2010), a follow-up of young people who participated in the guidance groups was carried out one year later. the program took place in the department of student orientation (doe) in the university of buenos aires. specifically, it analyzed the way young people felt about their current situation and the development of their study and work projects, with the aim of exploring the possible influence they think the participation in the groups has in their guidance. for this purpose, a telephone survey have been made. the results show that most of young people express their satisfaction with the guidance activity. specially, they appreciate to discuss about the aspects in common of the transition with others in group, and to broaden the information in order to build their trajectories.
Analysis of Children’s English Language Learning Evidences when Engaging in Project Work*
Cáceres Arbeláez,Alix Argenis; Unigarro Millán,Diana Rocío;
Profile Issues in Teachers` Professional Development , 2007,
Abstract: in this article we want to share the great experience of working by projects because our fifth graders showed us the huge potential they have to explore, investigate, create and learn english. teachers have to motivate students to work in class because they are anxious to acquire new knowledge. we can do this by integrating the contents of the syllabus for fifth grade, by contextualizing it and putting it into action. of course, we have to take into account our students’ needs, likes and expectations in order to steer them into a project. in this way, we can prepare our students to face the learning processes in an easy, funny and enjoyable way.
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