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Search Results: 1 - 10 of 43033 matches for " Fernando Alberto VALENZUELA-ESCOBOZA "
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IDENTIFICACIóN Y FLUCTUACIóN POBLACIONAL DEL MINADOR DE LA HOJA LIRIOMYZA TRIFOLII EN CHILE JALAPE O EN EL NORTE DE SINALOA
Fernando Alberto VALENZUELA-ESCOBOZA,Néstor BAUTISTA-MARTíNEZ,José Refugio LOMELI FLORES,Jorge Manuel VALDEZ CARRASCO
Acta zoológica mexicana , 2010,
Abstract: México es de los principales productores de chile, ya que al a o se siembran alrededor de 140,000 ha y la producción asciende a 1'180,000 t. En el estado de Sinaloa se establecen, en promedio, 17,180 ha/a o, con una producción de 488,153 t. Este cultivo es una importante fuente de empleos y de derrama económica. Se identificaron las especies de minadores de la hoja y su fluctuación poblacional en el cultivo de chile jalape o en tres municipios del norte de Sinaloa. Se desarrollaron 29 muestreos semanales de octubre de 2008 a abril de 2009. Se contabilizaron minas en foliolos. La fluctuación de adultos se determinó con trampas de impacto color amarillo fluorescente a la altura del cultivo y una trampa fija a 1.70 m. Se determinó taxonómicamente a Liriomyza trifolli (Burgess) mediante claves especializadas. Este agromícido presentó cantidades altas en el municipio de Guasave en comparación con Ahome y El Fuerte, aunque en los tres lotes las poblaciones más abundantes fueron en las etapas de floración y fructificación. Las trampas de altura variable capturaron más adultos del minador de la hoja en los tres lotes, en comparación con trampas fijas a 1.70 m.
Identificación y fluctuación poblacional del minador de la hoja Liriomyza trifolii en chile jalape?o en el norte de Sinaloa
VALENZUELA-ESCOBOZA, Fernando Alberto;BAUTISTA MARTíNEZ, Néstor;LOMELI FLORES, José Refugio;VALDEZ CARRASCO, Jorge Manuel;CORTEZ MONDACA, Edgardo;PALACIOS TORRES, Rogelio Enrique;
Acta zoológica mexicana , 2010,
Abstract: mexico is one of the main producers of pepper. near 140,000 ha are sown per year and the production rises to 1'180,000 t. in sinaloa near 17,180 ha/per year are sown, with a production of 488,153 t. this crop is a major source of jobs and economic income. with the results of this research, we identified leaf miner species and their population fluctuation in jalape?o pepper at three locations in the north of sinaloa. twenty-nine weekly samplings were done from october 2008 to april 2009. mines were counted leaflets. adult fluctuation was determined with yellow fluorescent impact-traps at the height of the crop and another trap was set at 1.70 m. liriomyza trifolli (burgues) was determined taxonomically by using specialized keys. even though the occurrence of the agromizid miner was observed in flowers and fruits stages of jalape?o pepper plants at the three locations, it was higher in guasave compared to ahome and el fuerte locations. more adult agromizids were observed on the variable high traps than on the 1.70 high ones.
Topological Fermi liquids from Coulomb interactions in the doped Honeycomb lattice
Eduardo V. Castro,Adolfo G. Grushin,Belén Valenzuela,María A. H. Vozmediano,Alberto Cortijo,Fernando de Juan
Physics , 2011, DOI: 10.1103/PhysRevLett.107.106402
Abstract: We get an anomalous Hall metallic state in the Honeycomb lattice with nearest neighbors only arising as a spontaneously broken symmetry state from a local nearest neighbor Coulomb interaction V . The key ingredient is to enlarge the unit cell to host six atoms that permits Kekul\'e distortions and supports self-consistent currents creating non trivial magnetic configurations with total zero flux. We find within a variational mean field approach a metallic phase with broken time reversal symmetry (T) very close in parameter space to a Pomeranchuk instability. Within the T broken region the predominant configuration is an anomalous Hall phase with non zero Hall conductivity, a realization of a topological Fermi liquid. A T broken phase with zero Hall conductivity is stable in a small region of the parameter space for lower values of V .
Charge instabilities and topological phases in the extended Hubbard model on the honeycomb lattice with enlarged unit cell
Adolfo G. Grushin,Eduardo V. Castro,Alberto Cortijo,Fernando de Juan,Maria A. H. Vozmediano,Belen Valenzuela
Physics , 2012, DOI: 10.1103/PhysRevB.87.085136
Abstract: We study spontaneous symmetry breaking in a system of spinless fermions in the Honeycomb lattice paying special emphasis to the role of an enlarged unit cell on time reversal symmetry broken phases. We use a tight binding model with nearest neighbor hopping t and Hubbard interaction V1 and V2 and extract the phase diagram as a function of electron density and interaction within a mean field variational approach. The analysis completes the previous work done in Phys. Rev. Lett. 107, 106402 (2011) where phases with non--trivial topological properties were found with only a nearest neighbor interaction V1 in the absence of charge decouplings. We see that the topological phases are suppressed by the presence of metallic charge density fluctuations. The addition of next to nearest neighbor interaction V2 restores the topological non-trivial phases.
La música en el barrio como elemento de afirmación identitaria (El ejemplo de Vallecas)
Urrutia Valenzuela, Alberto
Revista de Dialectología y Tradiciones Populares , 2007,
Abstract: A number of cultural and sociological features give the neighborhood of Vallecas a strong identity and personality. From a cultural perspective, two musical genres, flamenco and rock-and-roll, greatly contributed to this idiosyncrasy ever since immigrants from other parts of Spain started to settle in large numbers in the district in the early 1900s. Coming most of them from Andalusia, the first waves of immigrants brought with them flamenco, which they developed and spread, thereby helping them cope with their sense of having been uprooted from their home towns and villages because of their migration. By contrast, the children of these immigrants, born in Vallecas, rejected this music that their parents would play and listened to, embracing rock-and-roll instead. For them, rock-and-roll became a new basis on which to assert the identity of their own generation as well as a means for socially expressing themselves and participating in the larger society. El barrio de Vallecas posee unas particularidades sociológicas y culturales que le han conferido una fuerte identidad y singularidad. Desde el punto de vista cultural, dos géneros musicales, el flamenco y el rock han contribuido a formar esas se as de identidad, ya desde que se registraron los primeros movimientos inmigratorios a principios del siglo XX. En su mayoría procedentes del Sur de Espa a, los inmigrantes trajeron con ellos el flamenco, que cultivaron y difundieron, lo que les ayudó en gran medida a combatir el sentimiento de desarraigo inherente a su situación. Por el contrario, los hijos de estos emigrantes, ya nacidos en el barrio, rechazaron en buena parte la música que escuchaban su padres para afirmarse generacionalmente a través del rock, estilo musical que adoptaron como medio de expresión y de participación social.
Inhibición, síntoma y angustia. Hacia una clínica nodal de las neurosis
Rodríguez Valenzuela Luis Alberto
Desde el Jardín de Freud , 2012,
Abstract:
EL ROL DE LA FIBRA DIETéTICA EN LA NUTRICION ENTERAL
Valenzuela B,Andrea; Maiz G,Alberto;
Revista chilena de nutrición , 2006, DOI: 10.4067/S0717-75182006000400002
Abstract: dietary fiber is constituted by a heterogeneous group of substances of vegetal origin that are resistant to digestion and absorption in the upper gastrointestinal tract, but that are partially or totally digested in the colon. the insoluble fiber aids to maintain a normal intestinal transit and the soluble one has beneficial effects on the micro flora of the colon where it is fermented generating short chain fatty acids (scfa). the scfa are the preferential substrate for the intestinal cells. despite the knowledge of the beneficial effects of the fiber the formulas of enteral nutrition (en) that are commonly indicated do not contain it. recently, soluble fiber fructooligosaccharides (fos) has been incorporated into some of these formulas, being useful for the handling of diarrhea on patients receiving en treatment. moreover, these formulas seem to be useful for the treatment of patients with inflammatory intestinal diseases or short-bowel syndrome
EL ROL DE LA FIBRA DIETéTICA EN LA NUTRICION ENTERAL ROLE OF DIETARY FIBER IN ENTERAL NUTRITION
Andrea Valenzuela B,Alberto Maiz G
Revista Chilena de Nutricíon , 2006,
Abstract: La fibra dietética está constituida por un grupo heterogéneo de sustancias de origen vegetal que son resistentes a la digestión y absorción en el intestino delgado, pero que sufren una digestión parcial o total en el colon. La fibra insoluble ayuda a mantener un tránsito intestinal normal y la soluble tiene efectos beneficiosos sobre la microflora del colon donde es fermentada generando ácidos grasos de cadena corta (AGCC). Los AGCC son substratos preferenciales para las células intestinales. A pesar del conocimiento sobre los efectos beneficiosos de la fibra, las fórmulas de nutrición enteral (NE) que rutinariamente se indican, no la contienen. Recientemente, se ha incorporado fibra soluble (fructo-oligosacáridos -FOS-) en algunas de estas fórmulas, siendo ellas de utilidad para el manejo de diarreas en pacientes que reciben NE. Además, estas fórmulas parecen ser útiles en el tratamiento de pacientes con enfermedades intestinales inflamatorias y en el síndrome de intestino corto Dietary fiber is constituted by a heterogeneous group of substances of vegetal origin that are resistant to digestion and absorption in the upper gastrointestinal tract, but that are partially or totally digested in the colon. The insoluble fiber aids to maintain a normal intestinal transit and the soluble one has beneficial effects on the micro flora of the colon where it is fermented generating short chain fatty acids (SCFA). The SCFA are the preferential substrate for the intestinal cells. Despite the knowledge of the beneficial effects of the fiber the formulas of enteral nutrition (EN) that are commonly indicated do not contain it. Recently, soluble fiber fructooligosaccharides (FOS) has been incorporated into some of these formulas, being useful for the handling of diarrhea on patients receiving EN treatment. Moreover, these formulas seem to be useful for the treatment of patients with inflammatory intestinal diseases or short-bowel syndrome
La integración dinámica de las perspectivas nativas en la investigación etnográfica
Balbi,Fernando Alberto;
Intersecciones en antropolog?-a , 2012,
Abstract: this paper intends to contribute to the development of a proper understanding of the nature of ethnographic research in social and cultural anthropology. to this end, we will undertake a critical review of its characterizations as an attempt to describe the social world from the actors' point of view and as an enterprise founded in the development of a dialogue between the theories sustained by the natives and by the ethnographer. drawing on the analysis of several classics of ethnographic literature, we will suggest that ethnography is characterized by a form of dynamic integration of the native perspectives into the description, and that this procedure operates as the research's driving force and as one of the central requirements that ethnographic texts must satisfy.
El carácter ambivalente de los conceptos carne y carnalidad en la teología cristiana
Roldán,Alberto Fernando;
Enfoques , 2010,
Abstract: this paper seeks to interpret the theological meaning of the biblical terms "flesh" and "carnality," showing their ambivalent nature which results from the fact that they are terms coupled with both negative and positive connotations. the author tries to show that the former come from a partial interpretation of paul's thought which, under the later influence of hellenism, was prone to be incorporated in christian thought, while the latter imply that carnality is nothing less than god's method for revealing himself in the historical person of jesus, "the word made flesh," and also implies a need for rehabilitating the body and human sexuality, and for considering carnality as a presupposition to secularization, as it was brought forward by hegel's philosophy and dialectical theology, in which barth, gogarten bultmann and bonhoeffer were some of its most remarkable exponents.
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