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Search Results: 1 - 10 of 208721 matches for " Gildardo; López-López "
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The contents of Cd, Cu, Pb and Zn of the white shrimp Litopenaeus vannamei (Boone, 1931) of six coastal lagoons of Sinaloa, NW Mexico
Frías-Espericueta,Martín G; Osuna-López,Isidro; Voltolina,Domenico; Beltrán-Velarde,Marco A; Izaguirre-Fierro,Gildardo; López-López,Gabriel; Muy-Rangel,Maria D; Rubio-Carrasco,Werner;
Revista de biología marina y oceanografía , 2009, DOI: 10.4067/S0718-19572009000100020
Abstract: abstract litopenaeus vannamei is the most important shrimp species in the traditional fishery of the coastal lagoons of the state of sinaloa (nw mexico), and most of the landings are consumed locally. since these lagoons receive important volumes of agricultural, industrial and urban effluents, consumption of this shrimp could pose risks to human health. the mean content of cd, cu, pb and zn determined in the hepatopancreas of shrimp from commercial landings from six lagoons of sinaloa were higher than those of the muscle. there was a weak correlation between the zn content of the two tissues (p≤0.05) and the correlations were not significant for cd, cu and pb (p>0.1). the concentrations found in the shrimp muscle were comparable or lower than those determined in commercial landings of different crustaceans from other geographic areas. according to our results the consumption of local shrimp poses no risks to human health.
La estimulación eléctrica del sistema nervioso central con finalidad analgésica
López-López,J. A.;
Revista de la Sociedad Espa?ola del Dolor , 2006,
Abstract: different procedures using electricity for pain control (mainly neuropathic) are described in this review. history of the so-called utility of electricity for pain control, describing the early attempts at the xviii century and their evolution. spinal cord stimulation: how does it works, patient?s selection, implant techniques, how to do the different procedures and complications and their management are described. brain stimulation: the same scheme as above, concerning both deep brain stimulation and motor cortex stimulation.
La estimulación eléctrica del sistema nervioso central con finalidad analgésica The electrical stimulation of the central nervous system for pain control
J. A. López-López
Revista de la Sociedad Espa?ola del Dolor , 2006,
Abstract: Esta revisión pretende orientar al lector sobre los procedimientos empleados para el control del dolor crónico, preferentemente neuropático, por medio de la electricidad. Historia de la utilización de la electricidad con finalidad analgésica, con descripción de los usos primitivos en el siglo XVIII y su evolución. Estimulación eléctrica medular: Se describen los mecanismos de acción, la selección de los pacientes, las técnicas de implante, la forma de realización de los diferentes procedimientos y sus complicaciones y el manejo de las mismas. Estimulación cerebral: Se sigue el mismo esquema que en el apartado anterior, diferenciándose en dos apartados: la estimulación cerebral profunda y la estimulación de la corteza prefrontal. Different procedures using electricity for pain control (mainly neuropathic) are described in this review. History of the so-called utility of electricity for pain control, describing the early attempts at the XVIII century and their evolution. Spinal cord stimulation: How does it works, patient’s selection, implant techniques, how to do the different procedures and complications and their management are described. Brain stimulation: The same scheme as above, concerning both Deep Brain Stimulation and Motor Cortex Stimulation.
Increasing Water Use Efficiency in Husk Tomato (Physalis ixocarpa Brot) Production in Tabasco, Mexico with Improved Irrigation Water Management  [PDF]
Rutilo López-López, Ignacio Sánchez Cohen, Marco Antonio InzunzaIbarra, Andrés Fierro álvarez, Gerardo Esquivel Arriaga
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.613114
Abstract: Husk tomato production technology was developed utilizing plastic sheeting and drip irrigation based on the results of reference evapotranspiration and crop coefficients (Kc) proposed at different phenological stages. The objectives of this study were as follows: 1) to evaluate the effect of plastic sheeting on the yield of husk tomato fruit with drip irrigation based on crop evapotranspiration; 2) to validate the use of drip irrigation technology and plastic sheeting in husk tomato production using demonstration plots; and 3) to determine the profitability and economic viability of the product in the domestic market. The proposed Kc values were 0.25, 0.71 and 0.56 in the initial, intermediate and final stage of crop development, respectively. Irrigation rates ranged from 2.5 to 6 mm·day-1, which was equivalent to an irrigation time of 0.6 to 2.5 hr. Soil moisture tension was monitored with tensiometers at depths of 15 and 30 cm in a loamy eutricfluvisol. The use of plastic sheeting increased husk tomato yield by 56.2% and water productivity by 63.5% under drip irrigation conditions when basing irrigation levels on crop evapotranspiration. Soil matrix potential varied between depths of 15 and 30 cm based on irrigation or rainfall amounts and the use of plastic sheeting with values being higher when the plastic sheeting was used. The husk tomato fruit yield in validation plots was 46 and 54.6 t·ha-1 with water use efficiencies ranging from 16.1 to 19.1 kg·m-3. These results exceeded the national average of 14 t·ha-1 and water use efficiency of 2.54 kg·m-3. With this new technology, a cost benefit ratio of 3.6 is obtained, which represents an economically profitable margin for farmers in the region.
Cd, Pb AND ORGANOCHLORINE PESTICIDES OF MYTELLA STRIGATA (PELECYPODA: MYTILIDAE) OF SIX COASTAL LAGOONS OF NW MEXICO
Osuna-López,José I.; Frías-Espericueta,Martín G.; López-López,Gabriel; Zazueta-Padilla,Héctor M.; Izaguirre-Fierro,Gildardo; Páez-Osuna,Federico; Ruiz-Fernández,Ana C.; Voltolina,Domenico;
Boletín de Investigaciones Marinas y Costeras - INVEMAR , 2009,
Abstract: los contenidos de cd y pb de los tejidos blandos de los mejillones de mangle mytella strigata colectados en 1996, en seis lagunas costeras del noroeste de méxico variaron entre 0.73 y 1.9 μg g-l y entre 8.3 y 17.1 μg g-l, respectivamente; los valores de ddd variaron entre 4.5 y 119 ng g-l los de dde desde menos del límite de detección (
Gill and Liver Histopathology in Goodea atripinnis Jordan, Related to Oxidative Stress in Yuriria Lake, Mexico
Ruiz-Picos,R; López-López,E;
International Journal of Morphology , 2012, DOI: 10.4067/S0717-95022012000300060
Abstract: in aquatic ecosystems, the complex mixture of pollutants may mediate the formation of free radicals and cause oxidative damage to the biota. yuriria lake (a ramsar site in central mexico) receives input of wastewater from its tributaries, agricultural runoff, and municipal discharge. we studied the lipid peroxidation (lpo), antioxidant enzymes (superoxide dismutase (sod), catalase (cat), and glutathione peroxidase (gpx), and histopathology of gill and liver of the native fish goodea atripinnis in yuriria lake. results were compared to a control group of fish cultivated in the laboratory. lpo, sod, and cat showed no significant differences compared to controls, but gpx showed greater and significant differences in both tissues. three class sizes were identified; organisms of classes i and ii had slight vasocongestion in the liver as compared to controls. hepatocytes of class iii showed cytoplasmic vacuolization, cellular disorganization, and the liver showed marked fibrosis compared to controls. gills of controls and classes i and ii showed no damage in gill filaments. tissue damage in class iii included hypertrophy, loss of the typical morphology, and edema in the gill filaments. the longer exposure of older organisms to yuriria lake conditions may have resulted in their poorer health condition.
Terrorism: Two Complementary Approaches
Wilson López-López,Claudia Pineda
Terapia Psicológica , 2011,
Abstract: A raíz de los atentados terroristas ocurridos en Noruega el 22 de julio de 2011, el presente artículo hace una revisión de aproximaciones que sobre el fenómeno del terrorismo han sido planteadas desde la psicología social y la psicología clínica. Desde las dos disciplinas de la psicología se identifican algunos factores de riesgo de tipo psicosocial e individual. Sin embargo en casos como el de Noruega, hay una clara demanda a la comprensión y explicación de las acciones violentas, desde áreas diversas (en niveles macrosociales e individuales) complementarias de la psicología, que puedan contribuir a la prevención y/o detección de potenciales atentados que desestabilicen o pretendan manipular comportamientos sociales utilizando medios violentos, extremistas, que lesionan los derechos humanos fundamentales.
Atención Psicológica Postdesastres: Más que un "Guarde la Calma". Una Revisión de los Modelos de las Estrategias de Intervención
Claudia Pineda Marín,Wilson López-López
Terapia Psicológica , 2010,
Abstract: El presente artículo expone algunos de los conceptos que sobre las estrategias de atención posterior a desastres que han sido publicadas en los últimos 5 a os en PsicoRedalyc y APA PsyArticles. De la revisión se destaca el hecho de que en habla hispana las publicaciones son mínimas en contraste con las más de 100 catástrofes ocurridas entre 2001 y 2010. Se presentan también modelos sistematizados sobre la experiencia de catástrofes ocurridas alrededor del mundo y de las que se han generado diferentes guías para la asistencia de los profesionales en salud mental a las víctimas. Se distingue una tendencia en la aplicación de técnicas propias de las terapias cognitivo-conductuales y un interés en la prevención del Trastorno de Estrés Post Traumático.
Gill and Liver Histopathology in Goodea atripinnis Jordan, Related to Oxidative Stress in Yuriria Lake, Mexico Histopatología en las Branquias e Hígado de Goodea atripinnis Jordan, Relacionada con el Estrés Oxidativo en la Laguna Yuriria, México
R Ruiz-Picos,E López-López
International Journal of Morphology , 2012,
Abstract: In aquatic ecosystems, the complex mixture of pollutants may mediate the formation of free radicals and cause oxidative damage to the biota. Yuriria Lake (a Ramsar site in Central Mexico) receives input of wastewater from its tributaries, agricultural runoff, and municipal discharge. We studied the lipid peroxidation (LPO), antioxidant enzymes (superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx), and histopathology of gill and liver of the native fish Goodea atripinnis in Yuriria Lake. Results were compared to a control group of fish cultivated in the laboratory. LPO, SOD, and CAT showed no significant differences compared to controls, but GPx showed greater and significant differences in both tissues. Three class sizes were identified; organisms of classes I and II had slight vasocongestion in the liver as compared to controls. Hepatocytes of class III showed cytoplasmic vacuolization, cellular disorganization, and the liver showed marked fibrosis compared to controls. Gills of controls and classes I and II showed no damage in gill filaments. Tissue damage in class III included hypertrophy, loss of the typical morphology, and edema in the gill filaments. The longer exposure of older organisms to Yuriria Lake conditions may have resulted in their poorer health condition. En los ecosistemas acuáticos, la mezcla compleja de contaminantes presente puede mediar la producción de radicales libres y causar da o por estrés oxidativo a la biota. La laguna de Yuriria (sitio RAMSAR en la parte central de México) recibe aguas residuales de sus afluentes, escorrentías agrícolas y descargas municipales. Se estudió la peroxidación lipídica (LPO), las enzimas antioxidantes superóxido dismutasa, (SOD), catalasa (CAT) y glutatión peroxidasa (GPx); y la histopatología de las branquias e hígado del pez nativo Goodea atripinnis en la Laguna de Yuriria. Los resultados obtenidos fueron comparados con un grupo control de peces cultivados en laboratorio. La LPO, SOD y CAT no mostraron diferencia significativa en comparación con los controles; pero la GPx mostró diferencias significativas para ambos tejidos. Se identificaron tres clases de talla; los organismos de la clase I y II tuvieron una ligera vasocongestión en el hígado en comparación con los controles. Los hepatocitos de la clase III mostraron vacuolización citoplásmica, desorganización celular y el hígado mostró una marcada fibrosis. Las branquias de los organismos control y de las clases I y II no mostraron da o en sus filamentos. El da o tisular en los organismos de la clase III incluyó hipert
EL MUNDO DE LA PSICOLOGíA Murray Sidman
Wilson López-López,Camilo Hurtado Parrado
Revista Latinoamericana de Psicología , 2005,
Abstract:
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