oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 4 )

2018 ( 8 )

2017 ( 7 )

2016 ( 15 )

Custom range...

Search Results: 1 - 10 of 7007 matches for " Domínguez Soto "
All listed articles are free for downloading (OA Articles)
Page 1 /7007
Display every page Item
Efecto de la sombra en plantas de caoba sobre la incidencia de Hypsipyla grandella Zeller y otros insectos, en Tabasco, México
Sánchez-Soto, S;Domínguez-Domínguez, M;Cortés-Madrigal, H;
Universidad y ciencia , 2009,
Abstract: the effect of shade (0, 40 and 80%) on mahogany plants (swietenia macrophylla king.) in regard to the prevalence of the borer hypsipyla grandella zeller (lepidoptera: pyralidae) and other insects, was evaluated in the region of la chontalpa, tabasco, mexico. the greatest occurrence of h. grandella was recorded in plants growing without any shade. the presence of phyllocnistis meliacella becker (lepidoptera: gracillariidae), antaeotricha ribbei zeller (lepidoptera: stenomidae) and clastoptera laenata fowler (hemiptera: cercopidae) was similar in all three percentages of shade. exophthalmus sp. (coleoptera: curculionidae) was the species present on plants with 40 and 80% shade, with a greater occurrence in plants with 80% shade. mahogany trees under 0 and 40% shade tended to be attacked mainly by heliothrips haemorrhoidalis bouché (thysanoptera: thripidae). statistical analyses (tukey, p < 0.05) revealed significant differences for the 0% shade for h. grandella, and for the 40% and 80% shades for exophthalmus sp. and h. haemorrhoidalis. in conclusion, the absence of shade on young mahogany plants creates a condition that strongly favours the presence of h. grandella, as well as an environment that is not beneficial for the presence of exophthalmus sp.
Exposition of Pecan Black Aphid (Melanocallis caryaefoliae) to Creseote Bush (Larrea tridentata) Extracts  [PDF]
Monica Marín-Domínguez, Ramona Pérez-Leal, Abelardo Nú?ez-Barrios, Moises Basurto-Sotelo, Juan Manuel Soto-Parra
Agricultural Sciences (AS) , 2014, DOI: 10.4236/as.2014.514147
Abstract: Creseote bush-based (Larrea tridentata Cov.) botanical insecticides have not been evaluated on pecan black aphid (Melanocallis caryaefoliae D.), the purpose of this research was to test the insecticide and/or repellent effect of the creseote-bush raw extracts on this insect. Ethyl acetate, methanol and water as solvents, the stem and leaf organs were tested at concentrations of 0.5%, 1%, and 2%, as well as their witnesses and the interactions of each. Extract application was made by immersion during 10 s and the incubation was made in a wet chamber, making observations at 24, 48 and 72 hours after the treatment was applied. Mortality was evaluated by touching the aphid and seeing it did not move, while for repellence the insects found outside of the leaf were taken into account. A higher mortality effect was observed at a 1% concentration for the three solvents on the leaf extracts, being the methanol one the most efficient, on the other hand the stem extracts had the same behavior, presenting the higher mortality in the ethyl acetate extracts at 0.5% and 2% both at 72 hours. On the other hand the higher repellent effect presented at 24 hours in stem extracts, with a variation in the leaf extracts.
Convivencia versus violencia: una propuesta de intervención educativa
María Luisa Alonso Escontrela,María del Carmen Pereira Domínguez,Jorge Soto Carballo
Revista de Investigación en Educación , 2003,
Abstract: El problema de la violencia escolar está afectando negativamente las relaciones entre los agentes personales de la comunidad educativa con consecuencias negativas para la formación del educando y el desarrollo profesional de los educadores. El análisis de aquella, junto con la propuesta de un programa de educación en valores como medio para la prevención y corrección de la violencia escolar cubren el contenido de este artículo.
Caracterización genómica de la integración in vitro del VIH-1 en células mononucleares de sangre periférica, macrófagos y células T de Jurkat Genomic Characterization of HIV-1 in vitro Integration in Peripheral Blood Mononuclear Cells, Macrophages and Jurkat T Cells
Juliana Soto,ángela Pe?a,Mercedes Salcedo,Martha C Domínguez
Infectio , 2010,
Abstract: Introducción: La mayor parte del genoma celular es accesible a la integración retroviral; sin embargo, se propone que este proceso no es aleatorio y es dependiente de cada retrovirus. Objetivos: Identificar y caracterizar las regiones del genoma humano en donde ocurre la integración del virus de la inmunodeficiencia humana de tipo 1 (VIH-1) en células mononucleares de sangre periférica, macrófagos y células T de Jurkat infectadas. Materiales y métodos: Se seleccionaron 300 secuencias de ADN humano obtenidas por el método de ligación mediada por PCR, previamente depositadas en el GenBank. Utilizando el programa BLAST, sólo 264 de ellas se incluyeron en el estudio, pues se pudo obtener información sobre localización cromosómica, genes anotados, secuencias repetidas, número de islas CpG y tiempo medio de replicación, entre otras variables genómicas. Estas secuencias se exportaron a otras bases de datos. Resultados: El 53% (140/264) de las integraciones se registraron en bandas G. El 70,45% de los provirus se localizaron en los genes humanos anotados, mientras que el restante lo hizo en elementos repetidos. En general, la selección del sitio de integración se relacionó con las características locales genómicas y estructurales de la cromatina, entre las que se incluyen secuencias Alu-Sx y L1, densidad génica y de islas CpG, remodelación de la cromatina y tiempo de replicación. éstas influenciarían la interacción eficiente del complejo de preintegración con los genomas celulares. Conclusión: Se determinó que la integración del VIH-1 en los genomas celulares estudiados estaría condicionada por características diferenciales de la cromatina y por procesos epigenéticos que influirían la selección del sitio blanco de integración. Introduction: Most of the infected host cell genome is available for retroviral integration; however, it has been proposed that this process does not occur at random and depends upon each type of retrovirus. Objective: The objective is to identify and characterize differences in human genome regions of peripheral blood mononuclear cells, macrophages and Jurkat T cells in which integration of HIV-1 occurs. Material and Methods: Three hundred human DNA genome sequences, previously deposited in the GenBank, were selected at random. Using program BLAST, only 264 of them were included in the study because relevant information about chromosomal position, associated genes, repetitive sequences, number of CpG islands and average replication time was available; these sequences were exported to other data bases for analysis. Results: 53% (140/264)
Chronic liver disease and cirrhosis mortality and social deprivation: a spatial analysis in small areas of Madrid region Mortalidad por cirrosis y otras hepatopatías crónicas y privación social: un análisis espacial por áreas peque as de la Comunidad de Madrid
J. Segura del Pozo,A. Gandarillas,F. Domínguez Berjón,M.a J. Soto
Nutrición Hospitalaria , 2010,
Abstract: Objectives: To study census-tract distribution of chronic liver disease and cirrhosis mortality in the Madrid Region and its association with socio-economic deprivation. Methods: Cross-sectional, ecological (3906 censustract) study, using mortality data for 1996-2003 and a deprivation index drawn up on the basis of 2001 census data. Standardised mortality ratios were calculated taking Spanish rates for 2001 as reference. Smoothed censustract relative risks were computed using the Besag-York-Mollie model. Relative risks (RRs) of dying and their 95% credibility intervals (95% CIs) were calculated according to quartiles of the deprivation index (with the fourth quartile -Q- of the indicator being the most unfavourable situation). Maps were plotted depicting the distribution of the posterior probability of RR > 1. Results: Census tracts with a high risk of mortality were detected, mostly located in the centre and on the eastern, south-eastern and south-western fringes of the city of Madrid. Mortality increased with deprivation. RRs of mortality according to quartíles of the deprivation index were: Q2 = 1.5 (CI: 1.3-1.6), Q3 = 1.9 (CI:1.7-2.2) and Q4 = 2.5 (CI:2.2-2.8) for men; and Q2 = 1.3 (CI:1.1-1.5), Q3 = 1.5 (CI:1.3-1.7) and Q4 = 1.6 (CI:1.3-1.8) forwomen. Conclusions: This small-area study enabled census tracts with excess mortality eligible for a special public health intervention to be identified, and their association with socio-economic deprivation to be confirmed. Objetivos: Estudiar la distribución por secciones censales de la mortalidad por cirrosis y hepatopatías crónicas de la Comunidad de Madrid y su asociación con la privación socioeconómica. Métodos: Estudio transversal y ecológico (3.906 secciones censales) utilizando los datos del registro de mortalidad de 1996-2003 y un índice de privación construido a partir de los datos del Censo de 2001. Se calcularon razones de mortalidad estandarizadas tomando como referencia las tasas de Espa a del 2001. Los riesgos relativos suavizados de las secciones censales se calcularon siguiendo el modelo Besag-York-Molife. Se han estimado los riesgos relativos (RR) de morir, y su intervalo de credibilidad al 95% (ICI), según los cuartiles del índice de privación (siendo el cuarto cuartil -Q4- del indicador la situación más desfavorable). Se realizaron mapas representando la distribución de la probabilidad posterior de RR > 1. Resultados: Se han detectado secciones censales con alto riesgo de mortalidad localizadas en su mayoría en el centro y la periferia este, sureste y suroeste de la ciudad de Madrid. La
Reducción de dimensión para el reconocimiento automático de patrones sobre biose ales
Genaro Daza Santacoloma,José Soto Mejía,Germán Castellanos Domínguez
Scientia Et Technica , 2007,
Abstract: Se presentan resultados para una metodología de reducción de dimensión, mediante la comparación entre técnicas de selección y extracción de características, que tiene como aporte fundamental la identificación de las condiciones de aplicación de cada una de las técnicas. Las pruebas experimentales se realizan sobre una base de datos de voz. Los resultados reflejan que la capacidad de reducción y clasificación de las técnicas de selección es usualmente superior a las de extracción, pero la naturaleza estadística de los datos tiene gran influencia sobre los métodos de reducción.
Comparación Histológica e Inmunohistoquimica de Muestras de Tejido Procesadas por la Técnica Convencional o por el Método Simplificado de Acetonas
Martínez Rivera,Pablo; Pi?a Osuna,Ana Karina; Soto Domínguez,Adolfo; García Garza,Rubén;
International Journal of Morphology , 2011, DOI: 10.4067/S0717-95022011000200046
Abstract: the conventional technique (ct) using alcohol as a drying agent, is a useful method of histology and pathology in the laboratory. recently, a new simplified method with acetone (ta) was designed in an attempt to reduce the processing time of the tissues (12 to 4 hours), the cost of reagents, and as an important factor to have an accurate and prompt diagnosis . this study compared the histological and immunohistochemical parameters in breast cancer, colon and kidney specimens treated with both methods. the sections were stained with h & e or masson trichrome. immunohistochemistry study with antibodies specific for the identification of cytokeratin ae1/ae3, the estrogen receptor and progesterone receptor was also carried out. blind study was conducted by three specialists in morphology, who evaluated the nuclear staining, staining of the cytoplasm and friability or changes in tissue structure. the specificity and sensitivity of antibody binding were also evaluated. the values obtained for each parameter were statistically analyzed with student t test. our results show that the methods of ct and ta did not alter histological features as the pattern of staining, and tissue changes were detected. immunohistochemical positivity was similar for both methods. there was no statistical difference between tc and ta. our results suggest that implementation of the ta did not alter the histological and immunohistochemical properties and could be a useful method for morphological analysis.
Caracterización genómica de la integración in vitro del VIH-1 en células mononucleares de sangre periférica, macrófagos y células T de Jurkat
Soto,Juliana; Pe?a,ángela; Salcedo,Mercedes; Domínguez,Martha C; Sánchez,Adalberto; García-Vallejo,Felipe;
Infectio , 2010,
Abstract: introduction: most of the infected host cell genome is available for retroviral integration; however, it has been proposed that this process does not occur at random and depends upon each type of retrovirus. objective: the objective is to identify and characterize differences in human genome regions of peripheral blood mononuclear cells, macrophages and jurkat t cells in which integration of hiv-1 occurs. material and methods: three hundred human dna genome sequences, previously deposited in the genbank, were selected at random. using program blast, only 264 of them were included in the study because relevant information about chromosomal position, associated genes, repetitive sequences, number of cpg islands and average replication time was available; these sequences were exported to other data bases for analysis. results: 53% (140/264) of integrations were located on g bands. 70.45% of provirus was located in human genes and the rest was located in repetitive elements. in general the integration site selection was correlated with genomics and structural characteristics of cell chromatin including alu-sx and l1 sequences, gene and cpg island densities, remodeling of chromatin, and replication time. all of them would influence the efficient interaction between the pre-integration complex and target cell genomes. conclusion: it was determined that hiv-1 integration in target cellular genomes would be conditioned by differential characteristics of associated chromatin and by epigenetic processes that would influence the selection of integration sites.
Cirugía general mayor ambulatoria y de corta hospitalización: Experiencia de 5 a?os de trabajo
Domínguez Lanuza,Juan Carlos; Zamora Santana,Orlando; Rodríguez Reyes,Juan Francisco; Rodríguez Soto,Mayda E;
Revista Cubana de Cirug?-a , 1999,
Abstract: a prospective study was conducted at the service of ambulatory major surgery and of short hospitalization of the "miguel enríquez" clinical and surgical teaching hospital to know the number of operations performed by this method, the most frequent affections, the types of anesthesis and complications. to this end, the medical histories of 3 254 patients who were operated on from january, 1991, to december, 1995, were reviewed, and grouped by levels. there was a predominance of inguinal hernias at level ii and of vesicular lithiasis at level iii. only 69 complications were observed
Sistema de Notación Munsell y CIELab como herramienta para evaluación de color en suelos
Domínguez Soto, Julia María;Román Gutiérrez, Alma Delia;Prieto García, Francisco;Acevedo Sandoval, Otilio;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: the color is one of the most important morphological features, the most obvious, easy to determine and relevant taxonomic identification of soils. the color of soils is closely related with the solid components (organic matter, texture, mineralogical composition, morphology) being the transition metals, mainly those soils can provide this characteristic. munsell notation system and cielab are two techniques for determining the color of the soil. the aim of this study is to evaluate the physical, chemical and mineralogical properties of denganthza hill's soil, and its relationship with the characteristic color showed in the samples, using methods of assessment color munsell notation system and cielab spectrophotometric system. in the munsell notation system soils have colors from pale yellow to reddish to values <> between 2.5y, 5y, 2.5yr, 7.5y rand 10yr showing clear staining indicating a depletion of fe and mn, leading to suggest that due to palaeosols causes, there has been a podzolization process. in cielab color of the soils studied are located in quadrants +a* and +b* and correspond to red and yellow, the color of wet soils corresponds to a reddish-yellow, high a higher yellow saturation occurring in the soils 1, 6 and 13, the rest is a trend toward lighter shades, but in dry soils shows the same yellow-red, without saturation with light shades in all samples.
Page 1 /7007
Display every page Item


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