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Search Results: 1 - 10 of 501553 matches for " Oscar de Jesús;Hernández-Sierra "
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Valor pronóstico del inmunofenotipo en la respuesta temprana de la leucemia aguda linfoblástica pre-B en ni?os
Correa-González, Lourdes Cecilia;Mandeville, Peter B;Manrique-Due?as, Javier;Alejo-González, Francisco;Salazar-Martínez, Abel;Pérez-Ramírez, Oscar de Jesús;Hernández-Sierra, Juan Francisco;
Gaceta médica de México , 2005,
Abstract: objective: to determine the prognostic value of pre b immunophenotype and its variants on early treatment response among of acute pediatric lymphoblast leukemia. patients and methods: a case control study nested in a cohort was carried out with male and female patients 15 years and younger with recently diagnosed pre b lymphoblast leukemia. a panel of b, t, monoclonal antibodies of the myelo monocytic and megakaryocytic cell type was used. response was assessed by bone marrow aspiration 14 days post treatment. results: 54 patients were included. the median age was 7 years (2 months - 14 years) median leukocyte count was 13,450/mm3 (1200-986,000/mm3). we identified 29 cases with late pre b immune phenotype, 19 cases with common pre b and 6 cases with early pre b immunophenotype. eleven patients also displayed myeloid antigens. a significant association (p=0.034) was found between early treatment response and the presence of myeloid antigens. no association was found between the pre b immunophenotype, age and leukocyte count with early treatment response (p=0.264). conclusions: we need to pay special emphasis on early treatment response in children with lymphoblast leukemia as our study did not corroborate the common finding that clinical factors and immune phenotype can be predictive factors.
Fluorosis en dentición temporal en un área con hidrofluorosis endémica
Loyola-Rodríguez,Juan Pablo; Pozos-Guillén,Amaury de Jesús; Hernández-Guerrero,Juan Carlos; Hernández-Sierra,Juan Francisco;
Salud Pública de México , 2000, DOI: 10.1590/S0036-36342000000300005
Abstract: objective: the aim of the present study was to estimate the prevalence of dental fluorosis in primary dentition of a san luis potosi children population, and its association to fluoride concentration in drinking water and urine. an additional objective was, to develop, validate, and test a specific index for dental fluorosis in primary dentition. material and methods: from may 1997, to january 1999, we conducted a cross-sectional study to assess the prevalence of dental fluorosis in primary dentition. study subjects were 100 children aged 3-6 years, selected at random from three kindergartens in three risk areas of san luis potosi. the specific index of dental fluorosis for primary dentition (dental fluorosis for primary dentition index-dfpdi) was validated by estimating fluoride concentrations in enamel of teeth with and without dental fluorosis. the kruskal-wallis test was used to assess the association between fluoride concentrations in drinking water and urine, with dental fluorosis; the association between risk area and dental fluorosis was assessed with the mantel-haenszel c2 test. results: . the prevalence of dental fluorosis in primary dentition was 78%; primary molars were most affected in both maxillae and the predominant color was a non-glossy white appearance. we found a strong direct correlation (r=0.93) between fluoride concentrations in primary teeth and the dfpdi. associations were found between fluoride concentrations of drinking water and urine, with dental fluorosis (kruskal-wallis p=0.00001), and between risk area and dental fluorosis (mantel-haenszel c2 p=0.00001). conclusions: dfpdi allowed adequate identification and grading of dental fluorosis in primary dentition. it is important to detect the initial toxic effects of fluoride exposure to predict dental fluorosis in permanent dentition and skeletal fluorosis.
Fluorosis en dentición temporal en un área con hidrofluorosis endémica
Loyola-Rodríguez Juan Pablo,Pozos-Guillén Amaury de Jesús,Hernández-Guerrero Juan Carlos,Hernández-Sierra Juan Francisco
Salud Pública de México , 2000,
Abstract: OBJETIVO: Determinar la prevalencia de fluorosis dental en la población infantil de la ciudad de San Luis Potosí, y su asociación con la concentración de flúor en agua de consumo y de orina. Asimismo, desarrollar, validar y probar un índice específico para fluorosis en dentición temporal. MATERIAL Y MéTODOS: Se efectuó un estudio transversal analítico, de mayo de 1997 a enero de 1999, en tres jardines de ni os, seleccionados al azar, en tres áreas de riesgo en San Luis Potosí. Se seleccionaron 100 ni os de edades entre tres y seis a os. El índice específico de fluorosis para dientes temporales fue validado mediante la cuantificación de concentraciones de flúor en esmalte de dientes con y sin fluorosis. Para estimar la asociación entre las concentraciones de flúor en agua y orina y el grado de fluorosis dental se utilizó la prueba estadística Kruskal-Wallis. En el caso de la asociación entre el área de riesgo y el desarrollo de fluorosis dental se utilizó ji2 de Mantel-Haenszel. RESULTADOS: La prevalencia de fluorosis en dentición temporal fue de 78%, la cual tuvo patrones diferentes de presentación, siendo los dientes posteriores los más afectados en ambos maxilares y la coloración predominante fue blanco mate. Se encontró una correlación (r=0.93) entre la concentración de flúor en esmalte de dientes temporales y el índice de fluorosis para dentición temporal (IFDDT). Se encontraron asociaciones entre la concentración de flúor en el agua de consumo y orina con el grado de fluorosis dental (Kruskal-Wallis, p=0.00001) y entre el área de riesgo y el grado de fluorosis (ji2 de Mantel-Haenszel p=0.00001). CONCLUSIONES: El IFDDT identifica y gradúa adecuadamente la fluorosis en dentición temporal. Es importante detectar el primer efecto tóxico de exposición a flúor para ser usado como predictor de fluorosis en dentición permanente y fluorosis esquelética.
Factores predisponentes en la vasoplejía posoperatoria: Azul de metileno (réplica) Predisposing factors in post-operative vasoplegia: Methylene blue (reply)
J.M. Mora-Ordó?ez,E. Curiel-Balsera,B. Hernández-Sierra,F. Sánchez-Llorente
Medicina Intensiva , 2007,
Abstract:
Electrical charging of aerosol nanoparticles and some practical applications
Alonso, M.,Hernández-Sierra, A.,Alguacil, F. J.
Revista de Metalurgia , 2003,
Abstract: This review article summarizes the main results of recent fundamental research on the electrical charging of nanometer-sized aerosol particles (particle diameter below 10 nm, Knudsen number above about 15, kinetic regime). It covers topics of great relevance to aerosol processing and measurement, such as the effect of the presence of a number of ions on the surface of a nanoparticle on its electrical mobility; the experimental measurement of charging probability / efficiency for particle diameter below 10 nm, both for diffusion and corona discharge type chargers; the effect of particle growth by Brownian coagulation on the charging process; and the examination of after-charging effects downstream of an aerosol neutralizes The last part of this article discusses two practical applications of nanoaerosol charging, namely, the particle size measurement by electrical methods, and some electrostatic effects on the removal of nanoparticles from gas streams. El presente artículo es una revisión bibliográfica sobre el cargado eléctrico de aerosoles de nanopartículas (diámetro de partícula inferior a 10 nm, número de Knudsen mayor de 15, régimen cinético). El artículo abarca algunos tópicos de gran interés para el procesado y la medición de aerosoles, tales como el efecto de la presencia de iones en la superficie de la nanopartícula en su movilidad eléctrica; la medición experimental de probabilidad / eficacia de cargado para partículas de diámetro inferior a 10 nm, tanto para cargadores de tipo difusivo como para los de descarga de corona; el efecto del crecimiento de partícula por coagulación browniana en el proceso de cargado; y los efectos de post-cargado corriente abajo del neutralizados En la parte final del artículo, se analizan someramente dos aplicaciones prácticas del cargado eléctrico de nanoaerosoles, a saber, la medición del tama o de partícula por métodos eléctricos, y algunos efectos electrostáticos en el proceso de eliminación de partículas en efluentes gaseosos.
El sentido estético y las abreviaturas
Luisa Fernández-Sierra
Panace@ : Revista de Medicina, Lenguaje y Traducción , 2006,
Abstract:
Long-term survival in patients with non-small cell lung cancer and synchronous brain metastasis treated with whole-brain radiotherapy and thoracic chemoradiation
Oscar Arrieta, Cynthia Villarreal-Garza, Jesús Zamora, Mónika Blake-Cerda, María D de la Mata, Diego G Zavala, Saé Mu?iz-Hernández, Jaime de la Garza
Radiation Oncology , 2011, DOI: 10.1186/1748-717x-6-166
Abstract: We reviewed the outcome of 30 patients with primary NSCLC and brain metastasis at diagnosis without evidence of other metastatic sites. Patients were treated with WBRT and after induction chemotherapy with paclitaxel and cisplatin for two cycles. In the absence of progression, concurrent chemoradiotherapy for the primary tumor with weekly paclitaxel and carboplatin was indicated, with a total effective dose of 60 Gy. If disease progression was ruled out, four chemotherapy cycles followed.Median Progression-free survival (PFS) and Overall survival (OS) were 8.43 ± 1.5 and 31.8 ± 15.8 months, respectively. PFS was 39.5% at 1 year and 24.7% at 2 years. The 1- and 2-year OS rates were 71.1 and 60.2%, respectively. Three-year OS was significantly superior for patients with N0-N1 stage disease vs. N2-N3 (60 vs. 24%, respectively; Response rate [RR], 0.03; p= 0.038).Patients with NSCLC and brain metastasis might benefit from treatment with WBRT and concurrent thoracic chemoradiotherapy. The subgroup of N0-N1 patients appears to achieve the greatest benefit. The result of this study warrants a prospective trial to confirm the benefit of this treatment.Brain metastases occur in 30-50% of patients with Non-small-cell lung cancer (NSCLC) and confer upon the patient a worse prognosis and quality of life [1-6]. Median survival of patients who receive supportive care and are treated only with corticosteroids is approximately 1-2 months [2]. Primary approaches to the treatment of brain metastases include Whole-brain radiation therapy (WBRT), surgery, stereotactic radiosurgery, or a combination, which have achieved a median survival time that ranges from 6.5-10 months [7-11].As improvements are made in the management of brain metastases, the question arises on how to manage patients with NSCLC who have solely stable brain metastatic disease and on whether treatment should be considered for the primary lung lesion. Long-term survival has been achieved in some patients who have under
Desnutrición materna y su relación con algunos resultados perinatales Maternal malnutrition and its relation with some perinatal results
ángel Puig Vega,Jesús Hernández Cabrera,Mercedes Sierra Velázquez,Teresa Crespo Hernández
Revista Cubana de Obstetricia y Ginecolog?-a , 2003,
Abstract: La nutrición en la embarazada constituye un tema polémico en nuestros días y se consideran entre los factores más importantes, la ganancia de peso materno durante la gestación y un tiempo gestacional óptimo. De la consulta de Nutrición del Centro durante el a o 2000 se efectuó un estudio prospectivo descriptivo de las pacientes así clasificadas de un total de 363 gestantes atendidas de las cuales 115 eran adolescentes hasta 19 a os y el resto, 248 de gestantes mayores de 20 a os. Los datos fueron recogidos en libro de registro habilitado al efecto que después fueron procesados en una computadora IBM de la Universidad de Matanzas y mediante el sistema MICROSTAT permitió el hallazgo del porcentaje, la media y la desviación estándar como medida de tendencia central y de dispersión, respectivamente y el X2 donde a £ 0,05. Se excluyeron de la muestra a los embarazos gemelares y a las que no parieron en el Centro. Se demostró que las embarazadas adolescentes no aportaron las mayores complicaciones y que lo más importante es la ganancia adecuada de peso en el embarazo que repercute no sólo en el peso del neonato sino en los indicadores de morbilidad y mortalidad perinatal. Nutrition in the pregnant women is a controversial topic nowadays and among the most important factors are the maternal weight gain during gestation and an optimal gestational time. A prospective descriptive study was carried out on 363 patients seen at the Nutrition Service of the hospital, 115 of them were adolescents up to 19 years-old and the remaining 248 were pregnant over 20 years. . Data were collected in a tailored-made register book and later processed in an IBM computer in Matanzas University through MICROSTAT system. They allowed estimating the percentage, the median and the standard deviation as a measure of central tendency and of dispersion respectively, and Chi square (X2) where a £ 0,05. Twin pregnant women and those who did not give birth at the hospital were excluded from the sample. It was shown that the adolescent pregnant women did not show the biggest complications and that the most important thing was an adequate weight gain during pregnancy that may affect not only the neonate′s weight but also the perinatal morbidity and mortality indicators.
Mexican Guidelines for the Diagnosis and Treatment of Chronic Myeloid Leukaemia  [PDF]
Eduardo Cervera, Federico Godínez, Rosa Sosa, Ramón Rivas, Carlos Best, Juan Hernández, Adrián Morales, Hugo Zurita, Ivette Carrasco, Jorge Cruz, álvaro Aguayo, José Espinoza, Juan Labardini, Luis Valero, Judith Cruz, Diana Arcos, Diego Limón, Omar López-Navarro, Daniela Gordillo-Bastidas, Myrna Candelaria, Francisco Torres, Juan Kassack, Oscar de Jesús Pérez Ramírez, Jorge Aquino, Guillermo Díaz, Mariela Cardiel, Margarita Rodríguez, Patricia Montoya, Juan Contreras, María Chávez, Sandra Chávez, David Gómez, Olga Cantú, Jorge Duque, Luis Pita, Eduardo Lobato, Julio López, Antonio López, Pedro González, Jorge Cortés
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.43092
Abstract:

Background: This document includes recommendations and guidelines issued by a group of Mexican researchers and specialists gathered in the First National Colloquium for the Diagnosis and Management of Chronic Myeloid Leukaemia (CML) by initiative of Instituto Nacional de Cancerología and with the support of the Leukaemia Department of the MD Anderson Cancer Center. Mexico lacks of updated information taken from its own reality on the diagnosis and treatment of CML and other haematological disorders; besides, there are no national guidelines. Aim: To publish a consensus document with guidelines for the management of CML adjusted to the national environment and overall characteristics. Method: The participants answered a DELPHI questionnaire about the overall aspects of the disease, aiming to target controversial topics, discuss them in the colloquium, and to agree on the best ones. After those meetings, a final document was drawn up. Results: The group presents recommendations for definition, diagnosis, prognosis, monitoring, and treatment of CML in Mexico. Conclusions: Having consensus guidelines for the clinical management of CML in our country will enable the consensual practice of Mexican specialists regarding the clinical approach to CML, as well as optimize the resources which allow the rational planning of the medical care strategies.

THE IMPLEMENTATION OF THE NEW TECHNOLOGIES IN THE EDUCATIVE PROCESS: CHALLEGES AND PERSPECTIVES / IMPLEMENTACIóN DE LAS NUEVAS TECNOLOGíAS EN EL PROCESO EDUCATIVO: RETOS Y PERSPECTIVAS
Manuel de Jesús Tapia Hernández
Didasc@lia : Didáctica y Educación , 2010,
Abstract: We can consider that the present-day tendencies of progress and expansion, in quantitative terms are amazing, but not in real qualitative terms; where the spoil that education has experimented in accordance to the level of quality is questionable. Above all else, in developing countries as it is ours, where inequalities are increased in educative matters. This is caused in a great extend for the innumerable economic, politic and social problems. Therefore, we consider the emerging necessity of making changes in the strategies and in the educative syllabi design. So that they consolidate the educative projects according to the new demands that is experimented in the development of the human chores nowadays.
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