oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 637 )

2018 ( 886 )

2017 ( 928 )

2016 ( 1285 )

Custom range...

Search Results: 1 - 10 of 547956 matches for " Mónica Palacios Ríos "
All listed articles are free for downloading (OA Articles)
Page 1 /547956
Display every page Item
Una especie nueva de helecho del género Pteris (Pteridaceae) endémica de Costa Rica
Rojas Alvarado,Alexander Fco; Palacios Ríos,Mónica;
Revista de Biología Tropical , 2006,
Abstract: a new species of fern of the genus pteris (filicales: pteridaceae) endemic to costa rica. the new fern species pteris herrerae a. rojas & m. palacios, endemic to costa rica, is described. it differs from p. decurrens c. presl in basal segments reduced to 1/5-1/2 of the next segment (vs. 2/3-3/4), basal pinnae not bifurcated (vs. bifurcated), pinnae apex mucronate (vs. acuminate) and segment apex undulate (vs. dentate). it differs from pteris consanguinea in the elliptic pinnae (vs. oblong), two segments reduced on the base (vs. lack), segments entire to undulate (vs. dentate), basal pinnae without basiscopic lobes (vs. with basiscopic lobes) and segment apex entire to undulate (vs. dentate). rev. biol. trop. 54 (3): 1061-1066. epub 2006 sept. 29.
Salinidad y el nivel del agua como factores en la distribución de la vegetación en la ciénaga del NW de Campeche, México
Víctor Rico Gray,Mónica Palacios Ríos
Acta botánica mexicana , 1996,
Abstract: El objetivo de este estudio fue establecer si la presencia de ciertas asociaciones vegetales (i.e., tular, manglar de Avicennia germinans, manglar de Rhizophora mangle, manglar mixto, asociación Rhizophora-Eleocharis) se relaciona con diferencias significativas de factores abióticos (i.e., nivel de agua superficial y salinidad del agua). El estudio se desarrolló en la región de los petenes, a lo largo de la costa NW de Campeche, México. Se encontró que la salinidad se incrementa con la sequía y disminuye rápidamente con las lluvias. El manglar de Rhizophora tuvo la mayor concentración de sales en el a o y la menor el tular. Para cada asociación, la salinidad fue significativamente mayor al finalizar la época seca que al terminar las lluvias. El nivel de agua disminuye al avanzar la sequía, se incrementa en junio con las precipitaciones pluviales y en julio se acerca a su máxima expresión. Sin embargo, encontramos diferencias significativas entre todas las asociaciones. Los resultados indican que la presencia de cada una de las comunidades estudiadas corresponde a condiciones específicas en términos de los factores abióticos considerados y sugieren que las altas salinidades del final de la temporada de sequía y la prolongada inundación durante la estación de lluvias, son determinantes para el establecimiento de las especies en las comunidades.
Una especie nueva de helecho del género Pteris (Pteridaceae) endémica de Costa Rica
Alexander Fco Rojas Alvarado,Mónica Palacios Ríos
Revista de Biología Tropical , 2006,
Abstract: Se describe Pteris herrerae A. Rojas & M. Palacios, endémica de Costa Rica. Esta es diferente de P. decurrens C. Presl por segmentos basales reducidos a 1/5-1/2 del tama o de los siguientes (vs. 2/3-3/4), pinnas basales no bifurcadas (vs. bifurcadas), ápice de las pinnas mucronado (vs. acuminado) y ápice de los segmentos ondulado (vs. dentado). También es diferente de Pteris consanguinea Mett. ex Kuhn por pinnas deltado-lanceoladas (vs. oblongas), con un par de segmentos reducidos en la base (vs. sin ellos), pinnas basales sin lóbulos basicópicos alargados (vs. con lóbulos basiscópicos) y segmentos enteros a ondulados (vs. dentados). A new species of fern of the genus Pteris (Filicales: Pteridaceae) endemic to Costa Rica. The new fern species Pteris herrerae A. Rojas & M. Palacios, endemic to Costa Rica, is described. It differs from P. decurrens C. Presl in basal segments reduced to 1/5-1/2 of the next segment (vs. 2/3-3/4), basal pinnae not bifurcated (vs. bifurcated), pinnae apex mucronate (vs. acuminate) and segment apex undulate (vs. dentate). It differs from Pteris consanguinea in the elliptic pinnae (vs. oblong), two segments reduced on the base (vs. lack), segments entire to undulate (vs. dentate), basal pinnae without basiscopic lobes (vs. with basiscopic lobes) and segment apex entire to undulate (vs. dentate). Rev. Biol. Trop. 54 (3): 1061-1066. Epub 2006 Sept. 29.
Trasplante hepático en adultos: casuística de Clínica Alemana de Santiago
Hepp K,Juan; Ríos R,Horacio; Suárez P,Leopoldo; Zaror Z,Mónica; Quiroga G,Marta; Rodríguez M,Gabriela; Valderrama L,Rodrigo; Humeres A,Roberto; Innocenti C,Franco; Sanhueza,Edgar; Zapata L,Rodrigo; Cárdenas S,Rubén; Palacios J,José M; Abarca Z,Juan; Montalván R,Carlos; Noriega R,Luis M; Videla T,Domingo; Reynolds H,Enrique; Espinoza A,Ricardo; Sandoval S,Renato; Rius A,Montserrat;
Revista médica de Chile , 2002, DOI: 10.4067/S0034-98872002000700010
Abstract: background: the success of orthotopic liver transplantation (olt) has resulted in its widespread use for different liver diseases. aim: to report our 8 years experience with adult olt at clinica alemana de santiago. patients and methods: in all transplantations done at the center, we recorded patient's overall data and survival, postoperative medical and surgical complications and causes of death. results: between november 1993 and september 2001, 51 consecutive olt were performed in 44 patients (22 females, median age 45 years old). thirty eight patients presented with chronic and 6 with acute or sub-acute liver failure. cryptogenic cirrhosis and hepatitis c infection were the most common causes for olt. postoperative bleeding and extra-hepatic biliary complications were seen in 17.6 and 21.5% of cases respectively. acute rejection, bacterial infections, cmv infection or disease and post olt hemodialysis were the most common medical complications (51, 31, 19.6 and 19.6% of cases respectively). the overall 1 and 5 years survival rates were 80% and 73% respectively. considering exclusively the last 22 olt performed since january 1999, the 1 year survival rate has improved to 91%. conclusions: liver transplantation in chile provides a good long term survival with acceptable morbidity, due to a multidisciplinary approach management. the survival rates have improved over the last few years probably due to better surgical techniques, icu care and immunosuppression. these overall results are comparable with those from other centers in developed countries (rev méd chile 2002; 130: 779-86)
Catabolic Response Profiles, Catabolic Uniformity and Richness as Microbiological Indicators in a Soil of Pergamino, Buenos Aires Province, with and without Previous Application of Glyphosate  [PDF]
Ruth P. Ríos, Lidia Giuffré, Romina I. Romaniuk, Mónica G. Pérez, Eduardo A. Pagano
Journal of Agricultural Chemistry and Environment (JACEN) , 2016, DOI: 10.4236/jacen.2016.52009
Abstract: Incubation assay in trays was performed with two soils with different application histories of glyphosate: no application, and previous application. The soils used were Typic Argiudolls of Pergamino, province of Buenos Aires, and the treatments were: control (no application), and 20, 200 and 2000 mg of active ingredient per kg of soil. Sampling was performed at the beginning (T0) and 45 days after (T45). Catabolic response profiles (CRP), catabolic richness and catabolic uniformity were determined according to the methodology based on measuring the differences in respiration induced by substrate in a short time (4 hours). The substrates used in this study were 20, namely, two amines, 5 aminoacids, two carbohydrates, and 11 carboxylic acids. The objective of this work was to compare soils with different histories of application of glyphosate, measuring its effect on catabolic response profiles, catabolic uniformity and catabolic richness. In this study, no differences were observed between catabolic richness among the different sampling times and doses of glyphosate applied. Glyphosate application affected the structure of the soil microbial communities. At the end of the test, soils with all doses of previous herbicide application showed greater catabolic uniformity than soils without previous application.
Methodologies used to estimate tobacco-attributable mortality: a review
Mónica Pérez-Ríos, Agustín Montes
BMC Public Health , 2008, DOI: 10.1186/1471-2458-8-22
Abstract: A search was made in the Medline database until March 2005 in order to obtain papers that addressed the methodology employed for attributing mortality to tobacco use.Of the total of 7 methods obtained, the most widely used were the prevalence methods, followed by the approach proposed by Peto et al, with the remainder being used in a minority of studies.Different methodologies are used to estimate tobacco attributable mortality, but their methodological foundations are quite similar in all. Mainly, they are based on the calculation of proportional attributable fractions. All methods show limitations of one type or another, sometimes common to all methods and sometimes specific.Since the association between tobacco and mortality was first discovered [1,2], the task of attributing a given number deaths to smoking has been and continues to be a controversial process, beset by limitations and questioned from different quarters, including the powerful tobacco industry. With the appearance of the successive revisions of the International Classification of Diseases (ICD), there has been considerable progress in the process of categorizing mortality, but little in methods for attributing mortality to risk factors such as tobacco. Obtaining reliable estimates of the impact of tobacco on mortality would facilitate to have a clearer picture of the problem caused by smoking and would be of help in the planning of health policy.The task of quantifying smoking-attributable mortality has been performed mainly through indirect methods. This review sought to list and to describe the different methods of estimating mortality attributed to tobacco use, to indicate the principal methodological differences existing among them, and to identify the possible sources of variability in the results.In order to obtain papers that addressed the methodology employed for attributing mortality to tobacco use, a search was made in the Medline database until March 2005, using the terms, mortality, a
Efecto de borde sobre el banco de semillas germinables en un fragmento de bosque altoandino, reserva forestal municipal de Cogua (Cundinamarca, Colombia)
Acosta Ortiz Mónica Saida,Vargas Ríos Orlando
Acta Biológica Colombiana , 2004,
Abstract: Se evaluó el efecto de borde sobre la abundancia de especies del banco de semillas germinable de un fragmento de bosque en la Reserva Forestal Municipal de Cogua (Cundinamarca, Colombia). Se colectaron 240 muestras de suelo de 10 cm de profundidad en 80 puntos a lo largo de ocho transectos desde el borde hacia el centro del bosque. En cada punto de muestreo se registró la cobertura de la vegetación en pie. Las muestras se pusieron a germinar en el invernadero. Se contaron las plántulas por especie cada 15 días durante seis meses. Emergieron 1.686 individuos de 47 especies, la especie más abundante fue Poa annua. La diversidad y la riqueza del banco de semillas tienden a aumentar hacia el borde. No se encontró efecto de borde en las abundancias de las especies del banco de semillas, pero sí sobre el número de especies compartidas del banco y de la vegetación en pie. El 36% de las especies del banco de semillas está presente en la vegetación en pie, mientras que el 31,5% de la vegetación en pie forma bancos de semillas. Los patrones espaciales de las semillas del banco difieren según la especie, algunas como Carex sp. e Hydrocotyle bonplandii se pueden considerar como especies indicadoras de borde.
Value of the tuberculin skin testing and of an interferon-gamma release assay in haemodialysis patients after exposure to M. tuberculosis
Anibarro Luis,Trigo Matilde,Feijoó Diana,Ríos Mónica
BMC Infectious Diseases , 2012, DOI: 10.1186/1471-2334-12-195
Abstract: Background Patients with end-stage renal disease (ESRD) and Mycobacterium tuberculosis infection pose a high risk of developing active TB disease. It is therefore important to detect latent TB infection (LTBI) to be able to offer treatment and prevent progression to TB disease. We assessed the value of the tuberculin skin test (TST) and of an interferon-gamma release assay (Quantiferon -TB Gold in-Tube, QFT) for diagnosing LTBI in ESRD patients, after prolonged exposure to a highly contagious TB case in a haemodialysis unit. As a high number of patients presented erythema without induration in the TST response, this type of reaction was also analysed. Method The TST and QFT were simultaneously performed twelve weeks after the last possible exposure to a bacilliferous TB patient. If the first TST (TST-1) was negative, a second TST (TST-2) was performed 15 days later to detect a booster response. A comparison was made between the TST responses (including those cases with erythema without induration) and those for the QFT. The correlation with risk of infection and the concordance between tests were both analysed. Results A total of 52 patients fulfilled the inclusion criteria. Overall, 11 patients (21.2%) had a positive TST response: 3 for TST-1 and 8 for TST-2, and 18 patients (34.6%) showed a positive QFT response (p = 0.065). Erythema without induration was found in 3 patients at TST-1 and in a further 9 patients at TST-2. The three patients with erythema without induration in TST-1 had a positive TST-2 response. Concordance between TST and QFT was weak for TST-1 (κ = 0.21); it was moderate for overall TST (κ = 0.49); and it was strong if both induration and erythema (κ = 0.67) were considered. Conclusions In patients with ESRD, erythema without induration in the TST response could potentially be an indicator of M. tuberculosis infection. The QFT shows better accuracy for LTBI diagnosis than the TST.
Advances in applied research for the culture of Mexican silversides (Chirostoma, Atherinopsidae)
C.A. Martínez Palacios,I.S. Racotta,M.G. Ríos-Durán,E. Palacios
Biocell , 2006,
Abstract:
Tiempo de sangría de IVY modificado: Valores normales en edad pediátrica Modified Ivy's bleeding time: normal values in children
Ernesto Ríos L,Mónica Pinochet C,Mónica Mandujano
Revista chilena de pediatría , 1982,
Abstract:
Page 1 /547956
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.