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Search Results: 1 - 10 of 37281 matches for " Ramírez Puerta "
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índices de pobreza y funciones de bienestar
Darío Vélez Botero,Guillermo Pérez Puerta,Javier Ramírez Montoya
Lecturas de Economía , 1987,
Abstract: In the article: "Indices de pobreza: una discusión metodológica" published in the previous number of this journal we presented three indices P1, P2 and P3. The first is based on the percentage of poor people below a fixed poverty line, the second ads a measure of the gap between the poverty line and the average income of the poor. While the third considers in addition the degree of inequality amongst the poor. This paper considers an ordering amongst distributions of income based on these three indices. The first turns out to be equivalent to welfare functions based simply on the supposition that utility rises with income. Indices based on P2 are equivalent to welfare functions which increase with any transfer from a richer to a poorer person that is with any progressive transfer. P3 is shown to introduce the additional element whereby welfare rises more the poorer the person receiving a given transfer.
Identification of the HSP70-II gene in Leishmania braziliensis HSP70 locus: genomic organization and UTRs characterization
César A Ramírez, José M Requena, Concepción J Puerta
Parasites & Vectors , 2011, DOI: 10.1186/1756-3305-4-166
Abstract: Here, we report the existence of two types of HSP70 genes in L. braziliensis and the genomic organization of the HSP70 locus. RT-PCR experiments were used to map the untranslated regions (UTR) of both types of genes. The 3' UTR-II has a low sequence identity (55-57%) when compared with this region in other Leishmania species. In contrast, the 5' UTR, common to both types of genes, and the 3' UTR-I were found to be highly conserved among all Leishmania species (77-81%). Southern blot assays suggested that L. braziliensis HSP70 gene cluster may contain around 6 tandemly-repeated HSP70-I genes followed by one HSP70-II gene, located at chromosome 28. Northern blot analysis indicated that levels of both types of mRNAs are not affected by heat shock.This study has led to establishing the composition and structure of the HSP70 locus of L. braziliensis, complementing the information available in the GeneDB genome database for this species. L. braziliensis HSP70 gene regulation does not seem to operate by mRNA stabilization as occurs in other Leishmania species.The Leishmania genus involves about 20 species that infect humans, causing different clinical manifestations ranging from self-healing cutaneous lesions (CL), mucosal lesions (MCL) to fatal visceral infections (VL) [1]. More than 350 million people are considered at risk of contracting leishmaniases, and some 2 million new cases occur yearly [2]. In Latin America, CL and MCL are neglected public health problems endemic in 22 countries. Many species of the subgenus Viannia cause the majority of CL cases but MCL is principally caused by Leishmania (Viannia) braziliensis [3]. Canine leishmaniases, caused either by Leishmania infantum or by L. braziliensis, is also widespread in South America, being among the most important canine vector-borne diseases occurring in this region [4].During its digenetic life cycle, the Leishmania parasite needs to adapt from the environmental (vector) temperature to the mammalian-host tempe
Secuencia parcial del genoma del maxicírculo de Leishmania braziliensis, comparación con otros tripanosomátidos
Nocua,Paola; Ramírez,Cesar; Requena,José María; Puerta,Concepción Judith;
Universitas Scientiarum , 2011,
Abstract: objective. with the aim to provide new insights for genotyping and phylogenetic studies of the leishmania genus, in this study the sequence of the maxicircle in leishmania braziliensis, strain mhom-br-75-m2904, was determined and compared with those reported in other trypanosomatids species. materials and methods. searches for maxicircle sequences were performed in the unassembled sequences of genedb database version 2.1, as well as in the genbank, using the nd8 and rps12 genes of l. braziliensis as the initial probes. these sequences were assembled and compared with the homologous sequences of trypanosomatids using the bioinformatics tools lalign and clustalw2. the size of maxicircle was determined by southern blot assays. results. two maxicircle fragments of 6535 and 4257 nucleotides were assembled. the sequences of these genes showed high synteny and similarity with the sequences in other leishmania species. this similarity even was extended to the editing patterns of these molecules. conclusions. although l. braziliensis is the most divergent species of the leishmania genus in their nuclear genome, the maxicicircle has a high conservation. this result suggests that the pattern of editing present in the different leishmania species studied has been conserved also in the subgenus viannia. these results indicate a high conservation in the editing of mitochondrial transcripts at the genus level.
DISPERSIóN DE LA ONDA P, UN TRASTORNO DE CONDUCCIóN INTRA E INTERAURICULAR / P-wave dispersion, an intra and interauricular conduction disorder
Elibet Chávez González,Raimundo Carmona Puerta,Ramiro R. Ramos Ramírez
CorSalud , 2011,
Abstract:
ANáLISIS ELECTROCARDIOGRáFICO DE LA DISPERSIóN DEL INTERVALO TPICO-TFINAL EN EL INFARTO AGUDO DE MIOCARDIO CON ELEVACIóN DEL ST / Electrocardiographic analysis of the T peak-T end interval dispersion in acute myocardial infarction with ST-segment elevation
Raimundo Carmona Puerta,José M. Ercia Arenal,Ramiro Ramos Ramírez,Gustavo Padrón Pe?a
CorSalud , 2010,
Abstract: Resumen Introducción y objetivos: La dispersión del intervalo TPICO-TFINAL (Tpeak-Tend) constituye una novedosa variable electrocardiográfica asociada recientemente, al riesgo de arritmias ventriculares malignas en el síndrome de Brugada, pero apenas se ha estudiado en el infarto agudo de miocardio con elevación del segmento ST, por lo que se decidió analizarlo en este contexto. Métodos: Se realizó un estudio de corte transversal donde se compararon los electrocardiogramas de 37 pacientes con infarto con elevación del segmento ST y otros 37, supuestamente sanos con respecto a las variables electrocardiográficas que evalúan la repolarización ventricular. Resultados: Se encontraron diferencias altamente significativas (p<0,001) al comparar a los pacientes infartados (QT 416,9 ± 42,3; QTc 431,4 ± 36,2) con los sanos (QT 441,2 ± 57,4 y QTc 477,6 ± 58,5), y significativas (p < 0,05) en la TPICO-TFINAL (37.2 ms vs. 21,6 ms). Existió correlación significativa entre el QT y la TPICO-TFINAL en el IMACEST inferior y ántero-septal, la que fue doblemente intensa en la localización ántero-septal (r = 0,34 vs. r = 0,80). Conclusiones: La dispersión del intervalo TPICO-TFINAL fue significativamente mayor en pacientes con infarto agudo de miocardio con elevación del segmento ST, independientemente de la localización del infarto. / Abstract Introduction and objectives: Tpeak-Tend interval dispersion is a new electrocardiographic variable recently associated to the risk of malignant ventricular arrhythmias in Brugada syndrome but it has hardly been studied in the acute myocardial infarction with ST-segment elevation. That is why it was analyzed in this context. Methods: A cross-sectional study was carried out in which the electrocardiograms of 37 patients with ST-segment elevation myocardial infarctions and other 37 apparently healthy patients (regarding electrocardiographic variables that assess ventricular repolarization) were compared. Results: Highly significant differences were found (p < 0,001) when comparing patients with myocardial infarction (QT 416,9 ± 42,3; QTc 431,4 ± 36,2) with the healthy patients (QT 441,2 ± 57,4 y QTc 477,6 ± 58,5) and significant differences (p < 0,05) in T peak-T end interval (37,2 ms vs. 21,6 ms). There was a significant correlation between QT and T peak-T end in the inferior and anteroseptal STEMI, which was doubly intense in the anteroseptal localization (r = 0,34 vs. r = 0,80). Conclusions: T peak-T end interval dispersion was significantly higher in patients who have suffered from acute myocardial infarction with ST-segment elevati
INFARTO MIOCáRDICO ANTIGUO ENMASCARANDO UBICACIóN VERDADERA DE UNA VíA ACCESORIA / Old myocardial infarction disguising the real location of an accessory pathway
Raimundo Carmona Puerta,Ramiro R. Ramos Ramírez,Gustavo Padrón Pe?a
CorSalud , 2009,
Abstract:
Infección y colonización faríngea asintomática de ni?os por Streptococcus pyogenes
Restrepo Lozada,Mary Alejandra; Múnera Jaramillo,María Isabel; Ramírez Puerta,Blanca Susana; Acu?a Ramos,Clara Patricia;
Iatreia , 2012,
Abstract: objective: to establish the frecuency of streptococcus pyogenes infection or asymptomatic carriage in a group of children, by means of a rapid antigendetection test. methods: a cross-sectional study was carried out in a non-probabilistic sample of 144 children aged between 3 and 13 years, in two educational institutions in bogotá and medellin. a single throat specimen was obtained from each child to carry out the rapid test; demographic data and information on pertinent symptoms and signs were obtained by means of a survey. mean and standard deviation and percentages were calculated according to the nature of the variables. results: average age was 5.5 ± 2.8 years, with even distribution by gender. twenty one children (14,6%) were positive for s. pyogenes; out of them, 10 had possible infection and 11 were asymptomatic throat carriers. forty five children (31.3%) reported pharyngeal symptoms and 10 (22.2%) out of them were positive in the rapid test. ninety nine children (68.7%) were asymptomatic and of them 11 (11.1%) were also positive. discussion: management protocols for s. pyogenes infection would benefit from the detection based on rapid tests.
Fluorosis Dental en Escolares de 6 a 13 A?os de Instituciones Educativas Públicas de Medellín, Colombia, 2006
Ramírez-Puerta,Blanca S; Franco-Cortés,ángela M; Ochoa-Acosta,Emilia M;
Revista de Salud Pública , 2009, DOI: 10.1590/S0124-00642009000400014
Abstract: objectivethis study was aimed at determining dental fluorosis prevalence and severity amongst 6-13-year-old students residing in medellin, colombia. methods a descriptive study was carried out on 1,330 students attending 34 public schools in the city of medellin. two dentists trained in dental fluorosis diagnosis performed the examinations were after the teeth had been brushed. teeth were dried with gauze, isolated with cotton pellets and visually examined in natural light. the thylstrup and fejerskov index (tfi) was used for rating fluorosis. results dental fluorosis prevalence was 81 % (tfi>1); 46.4 % was related to mild dental fluorosis (tfi1 and tfi2) and 8.8% to severe dental fluorosis (tfi >5). tfi>=1 was found in 21 % of the children being examined in at least 50 % of their teeth. conclusion dental fluorosis prevalence level was found to be high in medellín, colombia; health authorities should thus focus their attention on preventing this problem.
Infección y colonización faríngea asintomática de ni os por Streptococcus pyogenes = Streptococcus pyogenes infection and asymptomatic throat carriage in children
Restrepo Lozada, Mary Alejandra,Múnera Jaramillo, María Isabel,Ramírez Puerta, Blanca Susana,Acu?a Ramos, Clara Patricia
Iatreia , 2012,
Abstract: Objetivo: establecer la frecuencia de estreptococo beta hemolítico del grupo A (Streptococcus pyogenes) en ni os, mediante una prueba rápida de inmunoensayo cromatográfico.Métodos: estudio piloto de tipo transversal en una muestra no probabilística de 144 ni os entre 3 y 13 a os, asistentes a centros infantiles de Medellín y su área metropolitana y a una institución educativa de Bogotá. Se tomaron muestras de garganta por frotis para la prueba rápida de S. pyogenes y se recolectó información demográfica y de antecedentes personales mediante una encuesta. Se calcularon los promedios con sus desviaciones estándar y los porcentajes de acuerdo con la naturaleza de las variables de interés.Resultados: la edad promedio del grupo fue 5,5 ± 2,8 a os con distribución similar por sexo. Veintiún ni os (14,6%) fueron positivos para S. pyogenes, diez de ellos fueron posibles infecciones y 11, portadores asintomáticos. De los 144 ni os, 45 (31,3%) tenían síntomas faríngeos, de los cuales 10 (22,2%) tenían S. pyogenes. Un total de 99 (68,8%) ni os fueron asintomáticos y 11 de estos (11,1%) presentaron prueba positiva para S. pyogenes.Discusión: la alta frecuencia de S. pyogenes en este grupo es un llamado de atención sobre la necesidad de implementar protocolos de manejo con pruebas rápidas para la detección del microorganismo.
Secuencia parcial del genoma del maxicírculo de Leishmania braziliensis, comparación con otros tripanosomátidos
Paola Andrea Nocua Martinez,Cesar Augusto Ramírez Segura,José María Requena Rolania,Concepción Judith Puerta Bula
Universitas Scientiarum , 2011,
Abstract: Maxicircle genome partial sequence of Leishmania braziliensis: assembling and comparison with other trypanosomatids. Objective.With the aim to provide new insights for genotyping and phylogenetic studies of the Leishmania genus, in this study the sequence of themaxicircle in Leishmania braziliensis, strain MHOM-BR-75-M2904, was determined and compared with those reported in othertrypanosomatids species. Materials and methods. Searches for maxicircle sequences were performed in the unassembled sequences ofGeneDB database version 2.1, as well as in the GenBank, using the ND8 and RPS12 genes of L. braziliensis as the initial probes. Thesesequences were assembled and compared with the homologous sequences of trypanosomatids using the bioinformatics tools LALIGN andClustalW2. The size of maxicircle was determined by Southern blot assays. Results. Two maxicircle fragments of 6535 and 4257nucleotides were assembled. The sequences of these genes showed high synteny and similarity with the sequences in other Leishmaniaspecies. This similarity even was extended to the editing patterns of these molecules. Conclusions. Although L. braziliensis is the mostdivergent species of the Leishmania genus in their nuclear genome, the maxicicircle has a high conservation. This result suggests that thepattern of editing present in the different Leishmania species studied has been conserved also in the subgenus Viannia. These results indicatea high conservation in the editing of mitochondrial transcripts at the genus level.
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