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Search Results: 1 - 10 of 619312 matches for " LILIANA C.; FERNáNDEZ A. "
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Surfactant Enhanced Chemofiltration of Zinc Traces Previous to Their Determination by Solid Surphase Fluorescence  [PDF]
Mabel Vega, Miriam Augusto, María C. Talío, Liliana P. Fernández
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.28104
Abstract: Surfactant enhanced chemofiltration on Nylon membranes pre-treated with hexadecyltrimethylammonium bromide (HTAB) and eosin dye (eo) is proposed for zinc traces quantification by solid surphase spectro- fluorimetry (SSF, λexc = 532 nm; λem = 548 nm). Operational variables which have influence on quantitative retention of metal complex have been studied and optimized. At optimal experimental conditions, quantita- tive recovery was reached with a detection limit of 0.662 pg?L–1 and quantification limit of 2.20 pg?L–1. The calibration sensitivity was of 1.22 L?pg–1 for the new methodology with a linear range of 2.20 pg?L–1 to 779 pg?L–1 Zn (II). The tolerance levels of potential interfering ions were studied with good results. Recuperation studies were carried out by standard addition method applied to natural water samples (San Juan, Argentine) without previous treatment. The reproducibility (between-days precision) was also evaluated over 3 days by performing five determinations each day. CV% was 0.37. The performing obtained in sensitivity and selec- tivity thanks to chemofiltration step, converts the proposed methodology in an adequate alternative to con- ventional techniques for Zn (II) traces determination.
Green Photoluminescent Methodology for Aluminium Traces Quantification in 24-Hour Urine of Subjects with Different Exposition to Tobacco Smoke  [PDF]
Débora G. Santarossa, María C. Talio, Liliana P. Fernández
American Journal of Analytical Chemistry (AJAC) , 2018, DOI: 10.4236/ajac.2018.910038
Abstract: The aim of this work has been to evaluate the aluminium (Al(III)) traces contents in 24-hour urine samples from subjects with different tobacco smoke expositions using a new methodology with 1,4-dihydroxy-9, 10-anthraquinone (Quinizarine, QZ) as a fluorosphore. Biological samples were tested using commercial reagent strips and clinical parameters. Al(III) was determined complexing with QZ followed by a solid phase extraction step using Nylon membranes as a solid support. The analyte was subsequently quantified by solid surface fluorescence (SSF, λem= 573, λexc= 490) with a detection limit of 0.88 μg L-1 and quantification limit of 2.69 μg L-1. The calibration curve was linear from 2.69 to 499.13 μg L-1 Al(III) (R2 = 0.9973). Urine samples were successfully analysed with an average recovery close to 100%. Solid phase extraction step showed efficacy to eliminate foreign ions and the highly fluorescent matrix own of urine. Results were validated by electrothermal atomic absorption spectrometry (ETAAS) with an adequate concordance. The new methodology has low operation cost with simple instrumentation and without organic solvent.
INTOXICACIóN POR ORGANOFOSFORADOS
FERNáNDEZ A.,DANIEL G; MANCIPE G.,LILIANA C.; FERNáNDEZ A.,DIANA C.;
Revista Med , 2010,
Abstract: organophosphorus compounds are a group of organic substances derived from the chemical structure of phosphorus. they have a large number of applications and utilities. they are used as oil additives, solvents, in the industry of dyes, varnishes, artificial leather, electrical insulation, waterproofing, plastic softeners, fungicides and others. given its wide distribution and use in different industries and trades, organophosphorus compounds can be taken accidentally causing intoxication and can be used with the intention to commit suicide. the intoxication with organophosphorus compounds produces a characteristic clinical syndrome with cholinergic symptoms after stimulation of acetylcholine receptors. the medical management of these patients could make the difference between life and death, hence the physician and all health personnel in the emergency department should be able to recognize and manage poisoning symptomatology properly.
INTOXICACIóN POR ACETAMINOFéN
MANCIPE,LILIANA C.; FERNáNDEZ A.,DIANA C.; FERNáNDEZ A.,DANIEL G.;
Revista Med , 2010,
Abstract: acetaminophen is one of the most widely used analgesics in the world. its good safety profile, efficacy and the fact that it is on the shelf medicine, makes the formulation of this drug very common in both adult and children. acetaminophen poisoning is a frequent motive of consultation in the emergency department, so that doctors in these areas must have a clear understanding of the pathophysiology, clinical presentation, diagnosis and treatment of this type of poisoning. in this article we make an update on the diagnosis and treatment of acetaminophen-poisoned patients.
INTOXICACIóN POR ORGANOFOSFORADOS INTOXICA O POR ORGANOFOSFORADO ORGANOPHOSPHORUS POISONING
DANIEL G FERNáNDEZ A.,LILIANA C. MANCIPE G.,DIANA C. FERNáNDEZ A.
Revista Med , 2010,
Abstract: Los compuestos organofosforados son un grupo de sustancias orgánicas derivadas de la estructura química del fósforo y tienen un gran número de aplicaciones y utilidades. Han sido utilizados como aditivos del petróleo, disolventes, en las industrias de colorantes, barnices, cuero artificial, aislantes eléctricos, impermeabilizantes, ablandadores de plásticos, fungicidas, insecticidas entre otros. Dado su amplia distribución y uso en diferentes industrias y en la agricultura, es muy frecuente que se presenten intoxicaciones accidentales por estos compuestos; además, como son sustancias que están al alcance de las personas, han sido empleadas como tóxicos en suicidios. El cuadro de intoxicación genera un síndrome clínico característico, con síntomas colinérgicos secundarios a la estimulación de los receptores de acetilcolina. El manejo médico de estos pacientes puede significar la diferencia entre la vida y la muerte, por lo que es importante que todo el personal de salud en los servicios de urgencias esté capacitado para reconocer el cuadro de intoxicación y manejarlo rápidamente en forma adecuada. Os compostos organofosforados s oum grupo de substanciasorganicas derivadas da estrutura química de fósforo e temum grande número de aplica es e usos. Têm sido utilizados como aditivos para óleos, solventes, indústrias de tintas, vernizes, couro artificial, isola oelétrica, impermeabiliza o, amaciadores de plástico, fungicidas, inseticidas, entre outros. Dada a suaampladistribui o e uso em diferentes indústrias e na agricultura, é muitocomum ter intoxica esacidentais por essescompostos, alémdisso, substancias que est odisponíveis para os indivíduos, têm sido usadas como substancia tóxica emsuicídios. O quadro de intoxica oproduzuma síndrome clínica característica, comsintomas colinérgica secundários à estimula o dos receptores de acetilcolina. A conduta médica destes pacientes pode significar a diferen a entre a vida eamorte, por isso é importante que todo o pessoal de saúde nos servi os de emergênciasejatreinado para reconhecer a figura de intoxica o e rapidamente tratar adequadamente. Organophosphorus compounds are a group of organic substances derived from the chemical structure of phosphorus. They have a large number of applications and utilities. They are used as oil additives, solvents, in the industry of dyes, varnishes, artificial leather, electrical insulation, waterproofing, plastic softeners, fungicides and others. Given its wide distribution and use in different industries and trades, organophosphorus compounds can be taken accidentally caus
INTOXICACIóN POR ACETAMINOFéN INTOXICA O PELO ACETAMINOFEN ACETAMINOPHEN POISONING
LILIANA C. MANCIPE,DIANA C. FERNáNDEZ A.,DANIEL G. FERNáNDEZ A.
Revista Med , 2010,
Abstract: El acetaminofén es uno de los analgésicos de más amplio uso en el mundo. Su buen perfil de seguridad, eficacia y el hecho de ser de un medicamento de venta libre, hacen que la formulación y la utilización de este fármaco sea muy común, tanto en la población adulta como en la pediátrica. Los cuadros de intoxicación por acetaminofén son causa frecuente de consulta en los servicios de urgencias; por tal razón, los médicos de estas áreas deben tener un claro conocimiento sobre la fisiopatología, cuadro clínico, diagnóstico y tratamiento. En el presente artículo se hace una revisión sobre el diagnóstico y el tratamiento de los pacientes intoxicados con este medicamento. O acetaminofeno é um dos analgésicos mais utilizados no mundo. Seu bom perfil de seguran a, a eficácia eo fato de que um medicamento de venda livre, fazem que a formula o e utiliza o desta droga seja muito comum tanto na popula o adulta como a pediátrica. As manifesta es de intoxica o por acetaminofen s o causas freqüentes de consulta na unidade de emergência; Por esta raz o, os médicos nessas áreas devem ter uma compreens o clara da fisiopatologia, aspectos clínicos, diagnóstico e tratamento. Neste artigo se faz uma revis o do diagnóstico e tratamento de pacientes intoxicados com essa droga. Acetaminophen is one of the most widely used analgesics in the world. Its good safety profile, efficacy and the fact that it is on the shelf medicine, makes the formulation of this drug very common in both adult and children. Acetaminophen poisoning is a frequent motive of consultation in the emergency department, so that doctors in these areas must have a clear understanding of the pathophysiology, clinical presentation, diagnosis and treatment of this type of poisoning. In this article we make an update on the diagnosis and treatment of acetaminophen-poisoned patients.
Análisis de la oferta de programas de pregrado en medicina en Colombia, durante los últimos 30 a os (1980-2010) Analysis of the supply of medicine undergraduate programs in Colombia, during the past 30 years
Daniel G Fernández ávila,Liliana Carolina Mancipe García,Diana C. Fernández ávila,Elsa Reyes Sanmiguel
Revista Colombiana de Reumatología , 2011,
Abstract: La educación superior en Colombia ha sufrido una importante transformación desde diciembre de 1992, cuando entra en vigencia la ley 30. Los programas de educación en ciencias de la salud y en especial los de pregrado en medicina no fueron ajenos a estos cambios y se presentó una proliferación de facultades y escuelas de medicina a lo largo y ancho del país. Las críticas desde diversos sectores no se han hecho esperar y los entes gubernamentales han buscado diversos mecanismos para garantizar la calidad de los procesos de formación y por ende de los futuros médicos. En el presente estudio se analiza la evolución de la oferta de programas de pregrado en Colombia durante los últimos 30 a os. Higher education in Colombia has undergone a major transformation since December of 1992 when the 30 law takes effect. Education programs in health sciences and especially medicine programs were not oblivious to these changes and there was a proliferation of medical schools throughout the country. Were many criticisms from various sectors and government agencies have sought various mechanisms to ensure the quality of training processes and hence of future physicians. In this study we examined the evolution of the offer undergraduate programs in Colombia over the past 30 years.
Aquatic Coleoptera from Mburucuyá National Park (Corrientes Province, Argentina) Los coleópteros acuáticos del Parque Nacional Mburucuyá (Provincia de Corrientes, Argentina)
Patricia L. M. Torres,Mariano C. Michat,María L. Libonatti,Liliana A. Fernández
Revista de la Sociedad Entomol?3gica Argentina , 2012,
Abstract: A list of the species of aquatic Coleoptera collected in Mburucuyá National Park is presented. One hundred and twenty-eight species included in 44 genera and seven families were identified. Ten species are new for Argentina: Agaporomorphus mecolobus Miller and Bidessonotus obtusatus Régimbart (Dytiscidae); Mesonoterus laevicollis Sharp, Suphisellus hyeroglyphicus Zimmermann, S. rufulus Zimmermann, S. sexnotatus (Régimbart), and Notomicrus traili Sharp (Noteridae); Berosus pluripunctatus Mouchamps, Enochrus guarani Fernández and Helobata corumbaensis Fernández & Bachmann (Hydrophilidae). Two families (Scirtidae and Spercheidae), 12 genera and 69 species are first cited for Corrientes Province. Se presenta una lista de las especies de coleópteros acuáticos colectadas en el Parque Nacional Mburucuyá. Se identificaron 128 especies, incluidas en 44 géneros y siete familias. Diez especies se citan por primera vez para la Argentina: Agaporomorphus mecolobus Miller y Bidessonotus obtusatus Régimbart (Dytiscidae); Mesonoterus laevicollis Sharp, Suphisellus hyeroglyphicus Zimmermann, S. rufulus Zimmermann, S. sexnotatus (Régimbart) y Notomicrus traili Sharp (Noteridae); Berosus pluripunctatus Mouchamps, Enochrus guarani Fernández y Helobata corumbaensis Fernández & Bachmann (Hydrophilidae). Dos familias (Scirtidae y Spercheidae), 12 géneros y 69 especies son citados por primera vez para la provincia de Corrientes.
Coleópteros acuáticos de lagunas situadas en el noroeste de la provincia de Corrientes, Argentina Aquatic Coleoptera from ponds in the northwest of Corrientes Province, Argentina
María C. Gomez Lutz,Liliana A. Fernández,Arturo I. Kehr
Revista de la Sociedad Entomol?3gica Argentina , 2012,
Abstract: El objetivo de este estudio es contribuir al conocimiento de la biodiversidad de coleópteros acuáticos del NE argentino. Los sitios de muestreo corresponden a dos lagunas permanentes ubicadas en el departamento Capital de la provincia de Corrientes, Argentina. Los muestreos fueron realizados desde octubre de 2010 a marzo de 2011. En total, 107 especies de coleópteros, incluidas en 40 géneros y ocho familias fueron registradas: Haliplidae, Dytiscidae, Noteridae, Dryopidae, Hydrochidae, Hydrophilidae, Limnichidae y Scirtidae. La especie Berosus hamatus Knisch es un nuevo registro para la Argentina. Dos familias (Haliplidae y Dryopidae), cuatro géneros (Haliplus Latreille; Pelonomus Erichson, Onopelmus Spangler, Phaenonotum Sharp) y 14 especies son citados por primera vez para la provincia de Corrientes. This study aims to improve the knowledge of aquatic Coleoptera biodiversity in northeastern Argentina. The sampling sites correspond to two permanent ponds located in the department Capital of Corrientes Province, Argentina. The samples were collected between October 2010 and March 2011. A total of 107 species of beetles, including 40 genera and 8 families were recorded: Haliplidae, Dytiscidae, Noteridae, Dryopidae, Hydrochidae, Hydrophilidae, Limnichidae and Scirtidae. Berosus hamatus Knisch is a new record for Argentina. Two families (Haliplidae and Dryopidae), four genera (Haliplus Latreille; Pelonomus Erichson, Onopelmus Spangler, Phaenonotum Sharp) and 14 species are cited for the first time for Corrientes Province.
Coleópteros acuáticos y semiacuáticos del Parque Provincial Ernesto Tornquist (Provincia de Buenos Aires, Argentina) Aquatic and semiaquatic Coleoptera from Ernesto Tornquist Provincial Park (Buenos Aires Province, Argentina)
Liliana A. Fernández,Patricia L. M. Torres,Mariano C. Michat,Sylvia Fischer
Revista de la Sociedad Entomol?3gica Argentina , 2010,
Abstract: Se presenta el primer relevamiento de coleópteros acuáticos y semiacuáticos del Parque Provincial Ernesto Tornquist. El material entomológico estudiado se obtuvo durante las campa as de recolección de insectos acuáticos, realizadas entre los a os 2005 y 2007, en las cuatro estaciones del a o. Los ambientes estudiados fueron los arroyos Ventana, El Loro, Sauce Grande y dos charcos temporarios. Se identificaron en total 5.200 ejemplares pertenecientes a 9 familias, 20 géneros y 34 especies. Se brinda el listado de las especies y su distribución en la Argentina. Se citan, por primera vez para el parque, 23 especies y por primera vez para la Provincia de Buenos Aires: Austrelmis sp. e Hydrochus stolpi Germain. We present the results of the first survey on the aquatic and semiaquatic water beetles from the Ernesto Tornquist Provincial Park. The material was obtained from several quantitative samplings of aquatic insects covering all seasons from 2005 to 2007. The surveyed habitats were the Ventana, El Loro and Sauce Grande streams and two rain pools. A total of 5,200 specimens belonging to 9 families, 20 genera and 34 species of Coleoptera were identified. A list of the species known to occur in the park along with their distributional data in Argentina is presented. Twenty-three species are cited from the park for the first time. Austrelmis sp. and Hydrochus stolpi Germain are recorded for the first time from Buenos Aires Province.
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