Efforts to increase donation rates among Hispanic and non-Hispanic black women should include information about both the technical aspects and the social value of donation. The specific terms "umbilical" and "donation" should be used consistently to prevent misunderstanding. Information should be provided by physicians with follow-up by other health providers.
Semiconductor molecular films based on a gallium phthalocyanine chloride (GaPcCl) and a bidentate amine were prepared by using vacuum thermal evaporation and electrochemical techniques in order to investigate the preferred conduction paths within the films. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) were employed to characterize the morphology of the films. The conductivity measurements were performed with two different methods in order to investigate preferential conduction directions. The film transverse conductivity was obtained by using scanning tunneling spectroscopy (STS) and the in-plane film conductivity was measured with a four-point probe system. From spectroscopy measurements, the tunneling conductance (dI/dV) was also obtained. From these results, it was found that the conductive nature of the films was strongly influenced by the deposition technique which in turn defined the morphological characteristics of the film. The evaporated method showed better conductivity response and provided semiconductor characteristics in the film transverse direction with an in-plane ohmic response. Finally, contact angle measurements were performed and showed hydrophobic characteristics in all cases. * Corresponding author.
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El presente trabajo se llevó a cabo para el estudio de estabilidad de taludes para un relleno sanitario manual, en el cual se consideró una población de 5000 habitantes, en el que, las propiedades geomecánicas utilizadas fueron: la cohesión, el ángulo de fricción y el peso específico, las cuales fueron introducidas al software Slide 5.0, mediante el método de Janbu. Las condiciones para el análisis, a las que el diseño del relleno estuvo sujeto fueron, tanto estáticas como pseudoestáticas, incluyendo niveles de saturación en la capa de residuos, provocando que ocurra inestabilidad y fallas en la geometría de los taludes. El resultado obtenido con el análisis de estabilidad de taludes, es conocido como Factor de Seguridad (F.S.) el cual indica la ocurrencia o no de un tipo de falla que se puede presentar en el talud. Este resultado del análisis se basa en la Norma Ecuatoriana de la Construcción 2011 la cual se encuentra vigente en el país, en la que se recomienda que, para el diseño y construcción de las obras en contacto con el suelo se debe garantizar un comportamiento adecuado de las estructuras y preservar la vida humana.
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