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Search Results: 1 - 10 of 201163 matches for " Magdalena RAMOS-GóMEZ "
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MOVILIDAD DE METALES EN JALES PROCEDENTES DEL DISTRITO MINERO DE GUANAJUATO, MéXICO
Magdalena RAMOS-GóMEZ,Javier AVELAR,Alejandro MEDEL-REYES,Laura YAMAMOTO
Revista internacional de contaminación ambiental , 2012,
Abstract: Se realizó la caracterización de tres jales del distrito minero de Guanajuato: uno abandonado hace 20 a os (Presa Abandonada), uno reciente (Presa en Operación) y un jal proveniente de la mezcla de diferentes compa ías (Presa Mezcla). Los tres jales presentaron carácter alcalino, condiciones aerobias con tendencias oxidantes, bajo contenido de humedad, muy baja capacidad de intercambio catiónico y ausencia de materia orgánica. Estas condiciones limitan la lixiviación de metales. Los análisis mineralógicos mostraron que los jales están constituidos mayoritariamente por cuarzo, calcita y magnetita. Los jales provenientes de la Presa Mezcla presentaron las mayores concentraciones totales (mg/kg) de Mn (1042.8), Al (12919.8), Fe (23911.3), Cr (71.3), Pb (24.6) y Cu (19.8). El Zn se encontró en mayor concentración en los jales de la Presa Abandonada (53.3 mg/kg). No se observaron concentraciones significativas de Cd y Hg, pero se detectó Pb (24.6 mg/kg) y Cr (71.4 mg/kg). Las pruebas de lixiviación indicaron que ninguno de los metales lixivió en porcentajes mayores al 0.1 %. En consecuencia, los jales estudiados no representan un riesgo ambiental. La escasa lixiviación de metales fue consistente con las condiciones fisicoquímicas imperantes, la naturaleza mineralógica de los residuos, el bajo potencial de generación de drenaje ácido y el alto grado de estabilidad observado en los estudios de fraccionamiento de metales.
Transcriptomic Analysis in Diabetic Nephropathy of Streptozotocin-Induced Diabetic Rats
Consuelo Lomas-Soria,Minerva Ramos-Gómez,Lorenzo Guevara-Olvera,Ramón Guevara-González,Irineo Torres-Pacheco,Marco A. Gallegos-Corona,Rosalía Reynoso-Camacho
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12128431
Abstract: Diabetic nephropathy (DN) is a major complication of diabetes and is caused by an imbalance in the expression of certain genes that activate or inhibit vital cellular functions of kidney. Despite several recent advances, the pathogenesis of DN remains far from clear, suggesting the need to carry out studies identifying molecular aspects, such as gene expression, that could play a key role in the development of DN. There are several techniques to analyze transcriptome in living organisms. In this study, the suppression subtractive hybridization (SSH) method was used to generate up- and down-regulated subtracted cDNA libraries in the kidney of streptozotocin (STZ)-induced diabetic rats. Northern-blot analysis was used to confirm differential expression ratios from the obtained SSH clones to identify genes related to DN. 400 unique SSH clones were randomly chosen from the two subtraction libraries (200 of each) and verified as differentially expressed. According to blast screening and functional annotation, 20.2% and 20.9% of genes were related to metabolism proteins, 9% and 3.6% to transporters and channels, 16% and 6.3% to transcription factors, 19% and 17.2% to hypothetical proteins, and finally 24.1 and 17.2% to unknown genes, from the down- and up-regulated libraries, respectively. The down- and up-regulated cDNA libraries differentially expressed in the kidney of STZ diabetic rats have been successfully constructed and some identified genes could be highly important in DN.
Comparación del contenido fenólico, capacidad antioxidante y actividad antiinflamatoria de infusiones herbales comerciales
Mu?oz-Velázquez, Erika Elizabeth;Rivas-Díaz, Karla;Loarca-Pi?a, Ma. Guadalupe Flavia;Mendoza-Díaz, Sandra;Reynoso-Camacho, Rosalía;Ramos-Gómez, Minerva;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: actually there is an increase on infusion consumption due their beneficial properties, which are attributable to the presence of phenolic compounds. by this reason, the aim of this study was to assess phenolic content, antioxidant capacity and anti-inflammatory capacity of commercial infusions of peppermint (mentha piperita l.), lemon grass (cymbopogon citratos), chamomile (matricaria chamomilla l.), arnica (heterotheca inuloides) and boldo (peumus boldus molina) obtained in supermarket in 2009. phenols content and antioxidant capacity were defined by spectrophotometry techniques. also, identification and quantification of phenolic compound was made by hplc. the anti-inflammatory activity was assessed by inhibition of ciclooxigenasa-2 (cox-2) enzyme. boldo infusion had greatest content of phenolic compounds and greater antioxidant capacity measured by abt techniques, followed by chamomile infusions by frap method. in assessed infusions ten different compounds were identified, finding in higher concentration the compounds catechin, epigallocatechin gallate, rosmarinic acid and eriocitrin. as for inhibitory capacity on cox-2, chamomile and lemon samples had higher percentages of inhibition, followed by boldo infusion. in general, results suggest that boldo and peppermint commercial infusions show biological properties with potential benefits for health.
Adjuvant interferon gamma in patients with pulmonary atypical Mycobacteriosis: A randomized, double-blind, placebo-controlled study
María T Milanés-Virelles, Idrian García-García, Yamilet Santos-Herrera, Magalys Valdés-Quintana, Carmen M Valenzuela-Silva, Gaspar Jiménez-Madrigal, Thelvia I Ramos-Gómez, Iraldo Bello-Rivero, Norma Fernández-Olivera, Reinaldo B Sánchez-de la Osa, Carmen Rodríguez-Acosta, Lidia González-Méndez, Gregorio Martínez-Sánchez, Pedro A López-Saura, the MACGAM Study Group
BMC Infectious Diseases , 2008, DOI: 10.1186/1471-2334-8-17
Abstract: A randomized, double-blind, placebo-controlled clinical trial was carried out in two hospitals to evaluate the effect of interferon (IFN) gamma as immunoadjuvant to chemotherapy on patients with atypical mycobacteria lung disease. Patients received placebo or 1 × 106 IU recombinant human IFN gamma intramuscularly, daily for one month and then three times per week up to 6 months as adjuvant to daily oral azithromycin, ciprofloxacin, ethambutol and rifampin. Sputum samples collection for direct smear observation and culture as well as clinical and thorax radiography assessments were done during treatment and one year after. Cytokines and oxidative stress determinations were carried out in peripheral blood before and after treatment.Eighteen patients were included in the IFN group and 14 received placebo. Groups were homogeneous at entry; average age was 60 years, 75% men, 84% white; MAC infection prevailed (94%). At the end of treatment, 72% of patients treated with IFN gamma were evaluated as complete responders, but only 36% in the placebo group. The difference was maintained during follow-up. A more rapid complete response was obtained in the IFN group (5 months before), with a significantly earlier improvement in respiratory symptoms and pulmonary lesions reduction. Disease-related deaths were 35.7% of the patients in the placebo group and only 11.1% in the IFN group. Three patients in the IFN group normalized their globular sedimentation rate values. Although differences in bacteriology were not significant during the treatment period, some patients in the placebo group converted again to positive during follow-up. Significant increments in serum TGF-beta and advanced oxidation protein products were observed in the placebo group but not among IFN receiving patients. Treatments were well tolerated. Flu-like symptoms predominated in the IFN gamma group. No severe events were recorded.These data suggest that IFN gamma is useful and well tolerated as adjuvant therapy
Hacia una definición del espacio de los consuetudinario en el medio indígena y de sus posibilidades de ejercicio en el marco de la nueva legalidad
Magdalena Gómez
Nueva antropología , 1993,
Abstract:
El sinuoso camino de la justicia en México
Magdalena Gómez
El Cotidiano , 2012,
Abstract: El presente texto ofrece un panorama sobre el estado actual de la búsqueda de justicia desde los movimientos sociales en nuestro país. [ ] Por ello iniciaré con un recuento de los saldos del neoliberalismo que afectan a los más amplios sectores y en especial a los pueblos indígenas [ ], mostraremos los casos emblemáticos abordados por la Corte Interamericana de Derechos Humanos. Todo lo anterior dará contexto a la presentación de la iniciativa del Tribunal Permanente de los Pueblos capítulo México que se instaló formalmente el 21 de octubre de 2011.
Lo que queda de un libro: memoria, restos e identidad = What is left from a book: memory, remains and identity
Ramos, Antonio Gómez
Educa??o , 2007,
Abstract: N o possui resumo em português
La espada de La Perla. Estudio de las empu aduras de remaches con doble arco: un Unicum en la serie de armas europeas de la Edad del Bronce
Gómez Ramos, Pablo
Gladius , 2001, DOI: 10.3989/gladius.2001.78
Abstract: The study of the Bronze-Age sword from La Perla (Madrid, Spain) shows the development of a unique hilt design in the shape of a double-arch during the Early and Middle Bronze Ages. After the well-known paper by Almagro-Gorbea in 1972 on the Guadalajara sword, new archaeological finds during the last thirty years have shown the singularity of this system as against those employed in other parts of Europe, a singularity confirmed by numerous metallurgical analyses of Bronze Age swords. El estudio de la espada madrile a de La Perla viene a constatar un modelo único de enmangar espadas en Espa a durante el Bronce Antiguo y Medio, mediante empu aduras de doble arco. Desde el trabajo clásico de Almagro Gorbea en 1972 sobre la espada de Guadalajara, se han venido sucediendo en estas casi tres décadas, nuevos hallazgos arqueológicos que refuerzan la singularidad del ejemplo espa ol con respecto a otras áreas europeas y que se completa con la investigación de los análisis metalúrgicos realizados a numerosas espadas de la Edad del Bronce.
Hornos de reducción de cobre y bronce en la Pre y Protohistoria de la Península Ibérica
Gómez Ramos, Pablo
Trabajos de Prehistoria , 1996,
Abstract: This work shows the main features of smelting furnaces for copper and tin ores, for the first time compared with the analytical study of metallurgical debris found in the Iberian Peninsula, dated from Chalcolithic up to Roman time. After the bibliographic criticism and the empirical analysis carried out, as a contribution it can be established that the crucible-furnace was the most common method used both for copper and bronze production, during Iberian Pre-and Protohistory. En este trabajo se presentan las características principales de los hornos de reducción de minerales de cobre y esta o, cotejadas por vez primera con el estudio analítico de restos metalúrgicos hallados en la Península Ibérica desde el Calcolítico hasta la romanización. Tras la crítica bibliográfica y el análisis empírico llevados a cabo se establece como aportación que la vasija- horno fue el método más comúnmente empleado a lo largo de la Pre y Protohistoria peninsular tanto para la producción de cobre como de bronce.
Análisis de escorias férreas: nuevas aportaciones al conocimiento de la siderurgia prerromana en Espa a
Gómez Ramos, Pablo
Trabajos de Prehistoria , 1996,
Abstract: Iron Age in Spain started with the arrival of the Phoenicians, and it meant the beginning and spread of iron production. Though many archaeological references exist, reliable information about the technology to produce the new metal is scarce. In this article, an analytical and microscopical study of smelting slags and furnace linings is presented reaching the conclusion that pre-Roman iron production was based on small size furnaces, usually without tapping slags. The slags, of irregular compositions, were of fayalite type, containing large amounts of wüstite, magnetite and free silica on some occasions. All these features indicate an unsophisticated iron smelting technology during this period. La Edad del Hierro, iniciada con la llegada fenicia, supuso la introducción y expansión de la siderurgia en Espa a. Aunque las referencias arqueológicas son numerosas, los datos fiables acerca de la tecnología de obtención del nuevo metal son escasos. En este artículo se presenta el estudio analítico y microscópico de escorias y revestimientos de hornos, llegándose a la conclusión de que la siderurgia prerromana estaba basada en hornos de peque o tama o, generalmente sin sangrado de escoria. Las escorias, de composición irregular, son fayalíticas y en ocasiones con abundante wustita y magnetita. Todo ello, junto al hecho frecuente de contener sílice libre, indica una tecnología de rasgos rudimentarios a lo largo de todo el período.
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