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Search Results: 1 - 10 of 463474 matches for " Regla; Sardi?as Pe?a "
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Fracciones biodisponibles de arsénico, plomo, cadmio y mercurio en sedimentos de corrientes superficiales seleccionadas
Hernández Pe?alver,María Teresa; García Melián,Maricel; Ca?as Pérez,Regla; Sardi?as Pea,Olivia;
Revista Cubana de Higiene y Epidemiolog?-a , 1999,
Abstract: the bioavailable fractions of arsenic, cadmium, lead, and mercury in the sediments of 20 selected rivers that supply water to more than 5 000 inhabitants in cuba were determined. the extraction was made in the fraction composed of particles under 63 mm with hydrochloric acid 0.5 mol/l. in the cases of arsenic and cadmium all the samples presented levels below the limits of quantification of the test methods. the medians of the concentrations of lead and mercury in all rivers were lower than 15 and 0-15 mg/g, respectively. the total concentration of metal/concentration of bioavailable metal ratio was calculated when quantifiable concentrations of bioavailable lead and mercury were found.
Fracciones biodisponibles de arsénico, plomo, cadmio y mercurio en sedimentos de corrientes superficiales seleccionadas
María Teresa Hernández Pe?alver,Maricel García Melián,Regla Ca?as Pérez,Olivia Sardi?as Pea
Revista Cubana de Higiene y Epidemiología , 1999,
Abstract: Se realizó la determinación de las fracciones biodisponibles de arsénico, cadmio, plomo y mercurio en los sedimentos de 10 ríos seleccionados, los cuales abastecen a comunidades de más de 5 000 habitantes en Cuba. Se efectuó la extracción en la fracción compuesta por partículas menores de 63 mym, con ácido clorhídrico 0,5 mol/L. En los casos de arsénico y cadmio, todas las muestras presentaron niveles inferiores a los límites de cuantificación de los métodos de ensayo. Las medianas de las concentraciones de plomo y mercurio fueron en todos los ríos inferiores a 15 y 0,15 myg/g, respectivamente. Se calculó la razón concentración de metal total/concentración de metal biodisponible, en los casos en que se detectaron concentraciones cuantificables de plomo y mercurio biodisponible. The bioavailable fractions of arsenic, cadmium, lead, and mercury in the sediments of 20 selected rivers that supply water to more than 5 000 inhabitants in Cuba were determined. The extraction was made in the fraction composed of particles under 63 mum with hydrochloric acid 0.5 mol/L. In the cases of arsenic and cadmium all the samples presented levels below the limits of quantification of the test methods. The medians of the concentrations of lead and mercury in all rivers were lower than 15 and 0-15 mug/g, respectively. The total concentration of metal/concentration of bioavailable metal ratio was calculated when quantifiable concentrations of bioavailable lead and mercury were found.
Dolor disfunción de la articulación temporomandibular asociado a la sintomatología ótica. Hospital Universitario Clínico-Quirúrgico Comandante Faustino Pérez Hérnandez. Matanzas. Enero 2007-enero 2008
Casas Acosta,Jorge; Sardia Valdés,Maribel; Pe?ate Sardia,Carlos Orlando; Pe?ate Sardia,Dianny;
Revista M??dica Electr?3nica , 2010,
Abstract: temporomandibular joints are located before the ears and bond the jawbones with the crania base through ligaments and muscles; they also integrate the oclusal surfaces of the teeth; it makes hinging movements in anterior-posterior sense, containing a fiber-gristly disc to avoid frictions; whatever alteration in any of its parts may cause a pain dysfunction syndrome, manifested in the person as myofacial pain, cephalea, earache or auditive symptoms. describing the relation between otic symptomatology and temporomandibular dysfunction. we studied 123 patients, with referred otic symptoms, remitted to the orthodontic consultation with negative diagnosis of otolaryngologic disease. for the clinical examination we used the krogh paulsen test to diagnose dysfunction. 115 patients presented temporomandibular join dysfunction with 93,5 % and as subjective symptoms, myofacial pain, cephalea and otalgia were considered the most significant. stress was a risk fact presented by 91,1 %, followed by oclusal problems. we stated that there is a relation between the temporomandibular disturbances and otic symptomatology, being women the ones who tended to suffer the disease more frequently.
Dolor disfunción de la articulación temporomandibular asociado a la sintomatología ótica. Hospital Universitario Clínico-Quirúrgico Comandante Faustino Pérez Hérnandez. Matanzas. Enero 2007-enero 2008 Pain dysfunction of the temporomandibular join associated to otic symptomatology. Faustino Pérez Hernández University's Hospital. Matanzas. January 2007-January 2008
Jorge Casas Acosta,Maribel Sardia Valdés,Carlos Orlando Pe?ate Sardia,Dianny Pe?ate Sardia
Revista M??dica Electr?3nica , 2010,
Abstract: Temporomandibular joints are located before the ears and bond the jawbones with the crania base through ligaments and muscles; they also integrate the oclusal surfaces of the teeth; it makes hinging movements in anterior-posterior sense, containing a fiber-gristly disc to avoid frictions; whatever alteration in any of its parts may cause a pain dysfunction syndrome, manifested in the person as myofacial pain, cephalea, earache or auditive symptoms. Describing the relation between otic symptomatology and temporomandibular dysfunction. We studied 123 patients, with referred otic symptoms, remitted to the orthodontic consultation with negative diagnosis of otolaryngologic disease. For the clinical examination we used the Krogh Paulsen Test to diagnose dysfunction. 115 patients presented temporomandibular join dysfunction with 93,5 % and as subjective symptoms, myofacial pain, cephalea and otalgia were considered the most significant. Stress was a risk fact presented by 91,1 %, followed by oclusal problems. We stated that there is a relation between the temporomandibular disturbances and otic symptomatology, being women the ones who tended to suffer the disease more frequently.
Método para el análisis de cadmio en tejidos biológicos por espectrometría de absorción atómica
Olivia Sardi?as Pea,Maricel García Melián
Revista Cubana de Higiene y Epidemiología , 1996,
Abstract: Se presenta un método para el análisis de cadmio (Cd) en tejidos biológicos por espectrometría de absorción atómica. El Cd fue analizado empleando la atomización electrotérmica con cubetas de grafito pirolítico, previa mineralización de las muestras con ácidos fuertes. La exactitud del método fue evaluada mediante el análisis del material de referencia certificado de hígado de bovino 1577a del Instituto Nacional de Normalización y Tecnología (anteriormente Buró Nacional de Patrones). La concentración de Cd obtenida en el análisis del material de referencia fue de 0,46 ± 0,02 my g/g y el certificado es de 0,44 ± 0,066 my g/g. Los límites de cuantificación y detección fueron de 0,0004 y 0,0001 my g/g, respectivamente. A method for the analysis of Cd in biological tisues by atomic absorption spectrometry is presented. The Cd was analyzed by using the electrothermic atomization with buckets of pyrolytic graphite, previous mineralization of samples with strong acids. The accuracy of the method was evaluated by analyzing as a reference material bovine liver 1557a certificated by the National Institute of Standardization and Technology (former National Bureau of Patterns) with a concentration of Cd of 0,44 " 0,02 mg/g. The concentration of Cd obtained through our analysis of the reference material was of 0,46 " 0,02 mg/g. The limits of quantification and detection were of 0,0004 mg/g and of 0,0001 mg/g, respectively.
Determinación de nitrógeno amoniacal y total en aguas de consumo y residuales por el método del fenato
Sardi?as Pea,Olivia; Pérez Cabrera,Adisbel;
Revista Cubana de Higiene y Epidemiolog?-a , 2004,
Abstract: the results of the determination of ammoniacal and total nitrogen by the method of phenate in waters were presented aimed at evaluating the quality indicators applied for the validation of assay methods at the laboratory of inorganic chemistry of the national institute of hygiene, epidemiology and microbiology. the precision, bias and uncertainty that were obtained in the lineal range of the calibration graph were evaluated as health indicators. the limit of detection of the method as well as the concentration of ammoniacal and total nitrogen of samples of drinking water and sewage processed by the evaluated method were reported. water samples were processed by the methods indicated in this paper and the normality in the distribution of the results was proved by shapiro wilk's w test.
Determinación de nitrógeno amoniacal y total en aguas de consumo y residuales por el método del fenato Determination of ammoniacal and total nitrogen in drinking water and sewage by the phenate method
Olivia Sardi?as Pea,Adisbel Pérez Cabrera
Revista Cubana de Higiene y Epidemiología , 2004,
Abstract: En este trabajo se presentan los resultados de la determinación de nitrógeno amoniacal y total por el método del fenato en aguas, con el propósito de evaluar los indicadores de calidad aplicados para la validación de métodos de ensayos en el laboratorio de Química Inorgánica del INHEM. Se evaluaron como indicadores de calidad: la precisión, el sesgo y la incertidumbre, los cuales fueron obtenidos en el rango lineal del gráfico de calibración. Se reporta el límite de detección del método así como la concentración de nitrógeno amoniacal y total de muestras de aguas de consumo y residuales procesadas por el método evaluado. Se procesaron muestras de aguas por los métodos indicados en el presente trabajo y se comprobó la normalidad en la distribución de los resultados mediante el test de Shapiro Wilk's W. The results of the determination of ammoniacal and total nitrogen by the method of phenate in waters were presented aimed at evaluating the quality indicators applied for the validation of assay methods at the Laboratory of Inorganic Chemistry of the National Institute of Hygiene, Epidemiology and Microbiology. The precision, bias and uncertainty that were obtained in the lineal range of the calibration graph were evaluated as health indicators. The limit of detection of the method as well as the concentration of ammoniacal and total nitrogen of samples of drinking water and sewage processed by the evaluated method were reported. Water samples were processed by the methods indicated in this paper and the normality in the distribution of the results was proved by Shapiro Wilk's W test.
Factores de riesgo de la disfunción temporomandibular asociados al Test de Krogh Paulsen
Sardia Valdés,Maribel; Casas Acosta,Jorge Enrique; Martínez Brito,Isabel; Pe?ate Sardia,Carlos Orlando; Pe?ate Sardia,Dianny;
Revista M??dica Electr?3nica , 2010,
Abstract: the stomatognathic system has been designed to execute a series of functions, being mastication and deglutition the most recognized and proper of the system. however, whatever affectation that can alter its normal functioning is considered a risk fact that could be the results of occlusal conditions, bruxism, stress, traumatisms, parafunctional habits, and others, being its aetiology multifactorial. the krogh-paulsen test includes nine items allowing evaluating the stomatognathic system function and determining the diagnosis on the existence or not of a temporomandibular joint dysfunction, the risk of suffering it and if there is any disturbance in it. evaluating the association between the temporomandibular dysfunction risk facts and the items of the krogh- paulsen test. we studied 119 patients assisting the orthodontics consultation suffering temporomandibular dysfunction; clinical oral examination using the krogh-paulsen test was made to them and dental occlusion was analysed. the presence of stress, unilateral mastication and occlusal interferences induced limitations in oral opening, pain and noise in the temporomandibular join. it was stated a direct relation between risk facts and the items of the krogh-paulsen test in the presence of temporomandibular dysfunction.
Aseguramiento de la calidad en un laboratorio acreditado
Sardi?as Pea,Olivia; Hernández Pe?alver,María Teresa;
Revista Cubana de Higiene y Epidemiolog?-a , 2002,
Abstract: the results obtained in the activites of quality assurance carried out at the inorganic chemistry laboratory of the national institute of hygiene, epidemiology and microbiology after the implementation of the quality system according to the "nc-iso/iec standards: guide 25. general requisites for the competence of the calibration and test laboratory" are presented. the laboratory was accredited in 1999 by the national accrediting body as a result of the hard work done to fulfill the requirements established for good laboratory practices, the standards of the family iso 9 000 and, specially, the nc-iso/iec: guide 25. the quality system documents that were taken into consideration to evaluate quality assurance were the following: manual of laboratory quality, manual of standardized operation procedures, manual of assay procedures and laboratory registries.
Aseguramiento de la calidad en un laboratorio acreditado
Olivia Sardi?as Pea,María Teresa Hernández Pe?alver
Revista Cubana de Higiene y Epidemiología , 2002,
Abstract: Se presentan los resultados obtenidos en el Laboratorio de Química Inorgánica del INHEM en las actividades de aseguramiento de la calidad después de implantado el Sistema de Calidad según las normas NC-ISO/IEC: Guía 25. Requisitos generales para la competencia de los laboratorios de calibración y ensayo. Acreditado en 1999 por el órgano Nacional de Acreditación, para obtener esta condición en el Laboratorio se trabajó intensamente el cumplimiento de los requisitos establecidos por las Buenas Prácticas del Laboratorio, las Normas de la Familia ISO 9 000 y especialmente la NC-ISO/IEC: Guía 25. Los documentos del sistema de calidad que se tuvieron en cuenta para evaluar el aseguramiento de la calidad fueron: Manual de Calidad del Laboratorio, Manual de Procedimientos Normalizados de Operación, Manual de Procedimientos de Ensayo y los Registros del Laboratorio. The results obtained in the activites of quality assurance carried out at the Inorganic Chemistry Laboratory of the National Institute of Hygiene, Epidemiology and Microbiology after the implementation of the Quality System according to the "NC-ISO/IEC standards: Guide 25. General requisites for the competence of the calibration and test laboratory" are presented. The laboratory was accredited in 1999 by the National Accrediting Body as a result of the hard work done to fulfill the requirements established for Good Laboratory Practices, the Standards of the Family ISO 9 000 and, specially, the NC-ISO/IEC: Guide 25. The quality system documents that were taken into consideration to evaluate quality assurance were the following: Manual of Laboratory Quality, Manual of Standardized Operation Procedures, Manual of Assay Procedures and laboratory registries.
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