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Search Results: 1 - 10 of 688835 matches for " Dra. María Sánchez-González "
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Propuesta metodológica para el análisis de las tecnologías de participación en cibermedios
Dra. María Sánchez-González,Dr. Jaime Alonso
Revista Latina de Comunicación Social , 2012,
Abstract: El presente artículo recoge los resultados del análisis de los mecanismos de participación, en especial los basados en tecnologías y aplicaciones de la web 2.0, sobre una muestra de catorce casos relevantes de cibermedios espa oles, tanto ediciones digitales de diarios como portales de radios y televisiones. Dicho análisis ha sido efectuado durante octubre y noviembre de 2010 en el marco del subproyecto de investigación La evolución de los cibermedios en el marco de la convergencia digital. Tecnología y distribución. Previa realización de una taxonomía de posibles mecanismos de participación, distinguiendo entre los imbricados en sus secciones informativas y los que conforman espacios con entidad propia, se estudian además los mecanismos de gestión puestos en marcha, según las funciones que el medio les asigna. Se trata, además de establecer una comparativa entre los distintos cibermedios, de describir ejemplos y tendencias en el ámbito de la participación.
Primary lymphoma of the colon Linfoma primario de colon
Marta Pascual,Blanca Sánchez-González,Mar García,Miguel Pera
Revista Espa?ola de Enfermedades Digestivas , 2013,
Abstract: Background: primary colorectal lymphoma is a very rare disease, representing less than 0.5 % of all primary colorectal neoplasms. The gastrointestinal tract is the most frequently involved site of all extranodal lymphomas, the most common type of that is non-Hodgkin's lymphoma. Early diagnosis is often difficult because of unspecific symptoms. Therapeutic approaches have classically included radical resection, chemotherapy and radiotherapy. Materials and methods: we present our experience in the management of primary colorectal lymphomas over a 17-year period (1994-20011). Results: in this period 7 cases of primary colorectal lymphoma were diagnosed in our institution. Abdominal pain and change in bowel habit were the most frequent symptoms. Five patients underwent emergency surgery because of bleeding or bowel obstruction. All primary intestinal lymphomas studied were of the B-cell phenotype. Patients were followed up for a median of 59 months (range 1-180). Three of them are alive with no evidence of recurrence. Conclusion: combination treatment with chemotherapy and surgery can obtain good remission rate. Surgery can resolve complications such bleeding or intestinal perforation that are implicated in lymphoma mortality. Introducción: el linfoma primario de colon y recto es una patología poco prevalente, representa tan solo el 0,5 % de todas las neoplasias primarias de colon y recto. El tracto gastrointestinal es el lugar donde asientan la gran mayoría de los linfomas extranodales, siendo el más frecuente el tipo linfoma no-Hodking. El diagnóstico precoz es siempre difícil debido a que la sintomatología es muy poco específica. Los algoritmos terapéuticos han incluido clásicamente la resección radical, el tratamiento con quimioterapia y con radioterapia. Materiales y métodos: presentamos nuestra experiencia en el manejo de los linfomas primarios de colon en un periodo de 17 a os (1994-2011). Resultados: en dicho periodo en nuestro centro fueron diagnosticaron 7 casos de linfoma primario de colon. El dolor abdominal y los cambios en el ritmo deposicional fueron los síntomas más frecuentes. Cinco pacientes requirieron tratamiento quirúrgico urgente debido a hemorragia digestiva u obstrucción intestinal. El estudio anatomopatológico reveló que todos los linfomas tenían el fenotipo de tipo B. Los pacientes tuvieron un seguimiento medio de 59 meses (rango 1-180). Tres de ellos siguen vivos sin evidencia de recidiva. Conclusión: el tratamiento combinado con quimioterapia y cirugía puede obtener buenos resultados de remisión. La cirugía puede resolver complic
Methodological proposal for the analysis of user participation mechanisms in online media
María Sánchez-González, Ph.D.,Jaime Alonso, Ph.D.
Revista Latina de Comunicación Social , 2012,
Abstract: This paper presents the results of an analysis of user participation mechanisms, particularly those based in Web 2.0 technologies and applications, based on a sample of fourteen relevant Spanish online media, including the websites of newspapers, radio stations, and television channels. This analysis was conducted in October and November 2010 as part of the research subproject La evolución de los cibermedios en el marco de la convergencia digital. Tecnología y distribución (The evolution of online media in the context of digital convergence. Tecnology and distribution). The study is based on a taxonomy of the different user participation mechanisms, which distinguishes between those that are integrated within the media’s news sections and those that are independent spaces. The analysis also examines the form in which these mechanisms are managed by the media in function of the role they are assigned. Finally, the study aims to compare the different online media and to show examples and trends in the field of user participation.
Presencia de las bases de datos del CSIC en las bibliotecas universitarias y científicas espa olas: descripciones y materiales didácticos para la formación de usuarios
Rodríguez-Yunta, Luis,Sánchez-González, María Jesús,Vidal-Liy, José Ignacio
Revista Espa?ola de Documentación Científica , 2009,
Abstract:
Musgos del Parque Nacional Los Mármoles, Hidalgo, México
Delgadillo-Moya, Claudio;Cárdenas-Soriano, María de los ángeles;Gálvez-Aguilar, Víctor Manuel;Sánchez-González, Arturo;
Boletín de la Sociedad Botánica de México , 2011,
Abstract: los mármoles national park, in the mexican state of hidalgo, is an area of floristic and phytogeographical interest. an adequate knowledge of its biota is a requisite before adopting conservation measures, especially for locally unknown plant groups such as the mosses. for this research, 573 specimens representing 129 species and varieties of mosses, were obtained from the main types of vegetation. non-parametric richness estimators (jackknife and bootstrap), indicate that the local moss inventory contains between 78 and 87% of the expected infrageneric taxa. the moss flora includes such species as aloina rigida and claopodium pellucinerve that extend southwards their known distribution, and campylopus anderssonii that extends it northwards. the identified patterns of distribution are arranged by number of species, as follows: wide distribution, mesoamerican, caribbean, boreal, endemic, southern, and chihuahuan. zimapán, the largest of the four municipalities represented in the park, is the most diverse with 90 moss species and varieties; in contrast, pacula, with the smallest surface area, has the smallest moss flora, with 39 taxa.
MUSGOS DEL PARQUE NACIONAL LOS MáRMOLES, HIDALGO, MéXICO
CLAUDIO DELGADILLO-MOYA,MARíA DE LOS áNGELES CáRDENAS-SORIANO,VíCTOR MANUEL GáLVEZ-AGUILAR,ARTURO SáNCHEZ-GONZáLEZ
Boletín de la Sociedad Botánica de México , 2011,
Abstract: El Parque Nacional Los Mármoles, en el estado de Hidalgo, México, es una zona de interés florístico y fitogeográfico. Para proponer medidas para su conservación se debe tener un conocimiento adecuado de la biota, en particular de grupos como el de los musgos que han sido poco estudiados. Para esta investigación se recolectaron 573 muestras en los principales tipos de vegetación, que representan 129 especies y variedades de musgos. Mediante estimadores de riqueza no paramétricos (Jackknife y Bootstrap) se determinó que el inventario contiene entre el 78 y el 87% de los taxones infragenéricos esperados. La flora de musgos incluye especies como Aloina rigida y Claopodium pellucinerve que amplían su distribución conocida hacia el sur, y Campylopus anderssonii que la extiende hacia el norte. Los taxones muestran varios patrones de distribución, enunciados en orden de importancia: amplia distribución, mesoamericano, del Caribe, boreal, endémico, austral y chihuahuense. De los cuatro municipios representados en el parque, Zimapán, el de mayor extensión, también muestra la mayor riqueza de musgos (90 especies y variedades), mientras que en el de Pacula, el de menor superficie, sólo se conocen 39 taxones.
Study of Regulatory T-Cells in Patients with Gastric Malt Lymphoma: Influence on Treatment Response and Outcome
Mar García, Beatriz Bellosillo, Blanca Sánchez-González, Francesc García-Payarols, Agustin Seoane, Ana Maria Ferrer, Eva Gimeno, Luis Eugenio Barranco, Ariadna Torner, Francesc Solé, Carles Besses, Sergi Serrano, Antonio Salar
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051681
Abstract: Purpose FOXP3+ regulatory T cells (Treg) play an essential role in modulating host responses to tumors and infections. The role of these cells in the pathogenesis of MALT lymphomas remains unknown. The aims of the study were to quantify the number of infiltrating FOXP3+ and CD3+ cells in patients with gastric MALT lymphoma at diagnosis and to study kinetics of these cells and CD20+ tumor cells after treatment and during long-term follow-up. Methods FOXP3+, CD3+ and CD20+ cells were analyzed by immunohistochemistry and the number of cells was quantified using a micrometric ocular. Samples of 35 patients with gastric MALT lymphoma at diagnosis and after treatment were included. Diagnostic samples were compared to 19 cases of chronic gastritis and diffuse large B-cell lymphoma (DLBCL) of the stomach. Results The median number of FOXP3+ infiltrating cells was higher (27 cells/cm2) in gastric MALT patients than in DLBCL (10 cells; p = 0.162) but similar to chronic gastritis (20 cells; p = 0.605). No characteristic or specific distribution pattern of infiltrating FOXP3+ cells was found. Gastric MALT lymphoma patients responding to bacterial eradication therapy had higher number of FOXP3+ cells at study entry. Kinetics of both infiltrating FOXP3+ cells and tumor CD20+ cells were strongly dependent on the treatment administered. Discussion Gastric MALT lymphomas have a number of Treg cells more similar to chronic gastritis than to DLBCL. Patients with higher number of tumor infiltrating FOXP3+ cells at study entry seem to have better response to antibiotics. Kinetics of Treg and tumor cells are influenced by type of treatment.
Estructura y composición de la vegetación del Ca?ón del Zopilote, Guerrero, México
ávila Sánchez, P.;Sánchez-González, A.;Catalán Everástico, C.;
Revista Chapingo. Serie ciencias forestales y del ambiente , 2010, DOI: 10.5154/r.rchscfa.2010.02.003
Abstract: an analysis was carried out of the change in the composition and structure of vegetation along an elevation gradient in zopilote canyon, located in the balsas river basin in guerrero. in an altitude range from 450 to 2,800 m, 28 sampling plots were established in five different vegetation types, defined by their physiognomy. within each vegetation type, six 1,000 m2 plots were selected for sampling tree species, and within these a 100 m2 subplot was established for shrubs and two 6 m2 subplots for herbaceous plants. the structural attribute estimated was the relative importance value of each species; cluster analysis was used for classifying vegetation types. in the elevation range studied, 314 species of vascular plants were identified (including four in the nom-059-ecol-2001), in 204 genera and 79 families. the most species-rich families were: asteraceae, fabaceae, burseracea, lamiacaea and euphorbiaceae. five vegetation types were identified: tropical deciduous forest, palm swamp, quercus forest, pinus forest and mountain cloud forest. the close proximity of these different vegetation types is most likely due to the abrupt changes in topographical and climatic conditions in zopilote canyon.
Análisis de la variación morfológica foliar en Quercus laeta Liebm. en el Parque Nacional Los Mármoles, Hidalgo, México
Zú?iga, E. á.;Sánchez-González, A.;Granados Sánchez, D.;
Revista Chapingo. Serie ciencias forestales y del ambiente , 2009,
Abstract: little is known about the species of quercus in mexico, due to its wide distribution, high intraspecific morphological variability and its capacity to form hybrids, which makes taxonomy of the genus difficult. the objective of the present study was to contribute to knowledge on foliar morphological variation of q. laeta, a widely distributed species in los mármoles national park (pnm), the second-largest natural protected area in the state of hidalgo. seventeen morphological characteristics were measured in 470 leaves collected from the lower halves of the canopies of 47 trees. all characteristics examined showed a normal distribution; a nested analysis of variance showed that the only significant morphological differences in q. laeta leaves between sites were diameter of the midvein in the central and basal portion of the leaf and petiole diameter at the base of the leaf. at the level of individuals, morphological variation was significant in 94 % of the characteristics analyzed. discriminant analysis showed that the characters that differed significantly among sites were maximum width of the leaf, distance between apical and basal sutures, distance between apical and basal lobules, leaf length, and petiole diameter. some of the foliar morphological characteristics analyzed can be considered specific to q. laeta.
Uso medicinal de las plantas por los otomíes del municipio de Nicolás Flores, Hidalgo, México
Sánchez-González, A.;Granados-Sánchez, D.;Simón-Nabor, R.;
Revista Chapingo. Serie horticultura , 2008,
Abstract: the otomies (the h??h?ü) of the nicolás flores municipality, hidalgo, have maintained their knowledge of medicinal plants over generations. allopathic medicine is limited mostly to prevention of diseases such as poliomyelitis, measles, smallpox, and malaria. it is considered that traditional medicine is more viable for this group of people because of the socioeconomic, cultural and physiographic conditions prevalent in the region. the objectives of this work were to identify the medicinal plant species used by the h??h?ü, the diseases treated with them, and their geographic affinity. for the field study, interviews were conducted with people in the municipality, and plant samples in different "ethno-ecological units" were collected. the use of 112 species was reported in treatment of disorders such as shock ("susto"), stomach pain, kidney pain, diarrhea, fever, and "mal de ojo" ("evil eye"), among others. although most of the inhabitants know the medicinal use of some plant species, the elders are the keepers of the deepest knowledge. in h??h?ü wisdom, magical-religious thought is part of their cosmovision. like other mexican ethnic groups, they consider the duality cold-hot in the treatment of diseases. the range of diseases the plants presumably heal is very broad, from colds to cancer. 75% of the species used by this ethnic group are native to the american continent, principally mexico and central america (39%), suggesting that the basic stock of traditional botanical knowledge is still observed.
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