This thesis attempts to put into practice certain precepts culled from leading semioticians in its focus on La camisa (1960), a work by the contemporary Spanish dramatist, Lauro Olmo (1922-). Semiotics has, thus, provided the theoretical framework from which to question the usual critical interpretations of this work: by concentrating on the theme of heroism the intention here is, therefore, to offer an alternative critical reading of the play's protagonists. / The work of Patrice Pavis, Anne Ubersfeld and Keir Elam is examined in the first chapter and particular attention is paid to the interface between signs, communication and characterization on stage. This is the theoretical basis for the consideration in the next chapter of the heroism of the masculine protagonist, widely acknowledged in previous criticism. In the third chapter an innovative interpretation is offered, using the same theoretical base, of the heroism of the female protagonist, which posits a code of behaviour rarely commented upon before.

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Thesis (Ph. D.)--University of Missouri-Columbia, 1996. / Typescript. Vita. Translation of Pablo Iglesias. Includes bibliographical references (leaves 204-218). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 1996. / Typescript. Vita. Translation of Pablo Iglesias. Includes bibliographical references (leaves 204-218). Also available on the Internet.

Memoria para optar al Título Profesional de Ingeniero Agrónomo Mención Sanidad Vegetal / Durante la temporada 2008-2009, se evaluó en laboratorio la toxicidad de cuatro insecticidas de origen botánico; Biomilbe, Biobug, Bugitol y Garlic Barrier, sobre larvas y adultos de la vaquita del olmo, Xanthogaleruca luteola Müller (Coleoptera: Chrysomelidae), colectados desde árboles ubicados en el Parque O`Higgins, Región Metropolitana. Los insecticidas se aplicaron en cuatro dosis distintas cada uno, mediante una torre de Potter, y su acción se evaluó de tres formas, directa, para determinar la toxicidad por contacto, sobre hojas, para medir el efecto residual, y una prueba con una bandeja que contenía por un lado hojas asperjadas con la mezcla insecticida y por el otro hojas sólo asperjadas con agua, para observar cualquier efecto de repelencia. Para los ensayos se utilizó un diseño estadístico completamente aleatorio, con los cuatro insecticidas en el primer y segundo ensayos, más un testigo sin insecticida, y cuatro repeticiones por tratamiento. La unidad experimental consistió en una placa Petri con 20 individuos. La mortalidad se evaluó 24 y 48 horas después de la aspersión sobre hojas, y a los 30 y 60 minutos en el experimento por aplicación directa. Los porcentajes de mortalidad se sometieron a pruebas no paramétricas sin normalización de datos y pruebas de separación de promedios. Para el ensayo en bandejas se comparó el porcentaje de larvas ubicadas en cada sector, tratado y no tratado. Los porcentajes de mortalidad obtenidos fueron muy bajos. El mayor promedio de mortalidad se obtuvo con Bugitol al 4%, con 46,3% y 37,5% de mortalidad en larvas y adultos respectivamente. En la prueba preliminar de repelencia se encontraron efectos marcados en las hojas tratadas con Biomilbe y Biobug, con las larvas concentrándose en mayor porcentaje sobre las hojas asperjadas sólo con agua. / The toxicity of four botanical insecticides, Biomilbe, Biobug, Bugitol, and Garlic Barrier, was evaluated in the laboratory onto larvae and adults of the elm leaf beetle Xanthogaleruca luteola Müller (Coleoptera: Chrysomelidae), which were collected in Parque O`Higgins, Santiago, Metropolitan Region of Chile. The insecticides were applied at four concentrations with a Potter spray tower, and their action was evaluated in three ways, directly, to determine contact toxicity, onto leaves, to measure contact effect of residues, and a test using a tray with leaves sprayed with the insecticide on one side, and leaves sprayed only with water in the other, to observe any effect of repellence. For the first two experiments, a completely random statistical design was used, with four insecticide treatments at four concentrations each, and an untreated control, and four replicates per treatment. The experimental unit was a Petri dish with 20 individuals. Mortality was evaluated at 24 and 48 hours after spraying onto leaves, and after 30 and 60 minutes in the experiment of immersion of leaves. Percentages of mortality were subjected to non-parametric tests without standardization of data and range tests to separate means. The percentages of mortality obtained were very low. The greatest mortality was obtained with Bugitol at 4%, with 46,3% y 37,5% of mortality of larvae and adults respectively. The preliminary repellency test show marked effects on the leaves treated with Biomilbe y Biobug, and higher percentage of larvae concentrated on spray leaves only with water.