The Increasing Chemical Complexity of the Taurus Dark Clouds: Detection of CH3CCH and C4H

Esta memoria refleja el trabajo de la red docente “Gestión Medioambiental y Gestión de la Calidad” para la elaboración de un libro docente para la asignatura de seis créditos “Gestión de la Calidad en Turismo”. Se ha elaborado un libro docente con el propósito de facilitar el aprendizaje del alumnado elaborando un material que permita tener en un solo documento lo que los estudiantes necesitan para preparar la materia. Para diseñar este material necesitamos conocer los objetivos del mismo, el contenido y los destinatarios. En este sentido, se han identificado los objetivos de la asignatura y los objetivos por tema. A partir de aquí, se ha elaborado el contenido de cada tema teniendo en cuenta los destinatarios, que en este caso es el alumnado de cuarto curso del Grado en Turismo. Una vez diseñado el material teórico, se ha actualizado el mismo con nuevos ejemplos de empresas. En concreto, diferentes organizaciones turísticas han proporcionado ejemplos para incluir en el libro (bien de manera anónima o bien identificando su nombre en el ejemplo). Esto ha permitido enriquecer los temas del libro al incluir documentos y materiales reales que utilizan las empresas cuando aplican la filosofía de la calidad

DETERMINATION OF THE HNC TO HCN ABUNDANCE RATIO IN GIANT MOLECULAR CLOUDS

The lines of the rare isotopes (H-13)CN, H(C-15)N, H(N-13)C, and (H-15)NC, which are sufficiently weak to be little affected by saturation, are used to measure the relative abundance of the isomers HCN and HNC in four giant molecular clouds. The low values of the HNC/HCN abundance ratio, which range from 0.015 to 0.40, are (1) similar to those found in warm sources from the common isotopes by Wootten et al. (1978), (2) not consistent with HNC and HCN production solely from various sources of the precursor ion H2CN(+), and (3) indicate that another source of HCN is required in warm, giant molecular clouds. It is suggested that neutral atom-molecule reactions may be an important contribution to the HCN production rate in such regions

VARIATIONS IN THE HCN HNC ABUNDANCE RATIO IN THE ORION MOLECULAR CLOUD

Observations of the rare isotopes of HCN and HNC have been used to determine the relative abundance of these two chemical isomers along the central ridge of the Orion molecular cloud. The abundance ratio HCN/HNC decreases by more than an order of magnitude from the relatively warm plateau and hot core sources toward the KL nebula to the colder, more quiescent clouds to the north and south. Even in the cooler regions, however, the ratio is an order of magnitude larger than that found in previous investigations of cold dark clouds. The kinetic temperature in the regions studied is determined from new observations of methylacetylene (CH3CCH), together with other recent estimates of the gas temperature near KL. The results suggest that the warmer portions of the cloud are dominated by different chemical pathways that those in the general instellar cloud material

VARIATIONS IN THE HCN HNC ABUNDANCE RATIO IN THE ORION MOLECULAR CLOUD

Observations of the rare isotopes of HCN and HNC have been used to determine the relative abundance of these two chemical isomers along the central ridge of the Orion molecular cloud. The abundance ratio HCN/HNC decreases by more than an order of magnitude from the relatively warm plateau and hot core sources toward the KL nebula to the colder, more quiescent clouds to the north and south. Even in the cooler regions, however, the ratio is an order of magnitude larger than that found in previous investigations of cold dark clouds. The kinetic temperature in the regions studied is determined from new observations of methylacetylene (CH3CCH), together with other recent estimates of the gas temperature near KL. The results suggest that the warmer portions of the cloud are dominated by different chemical pathways that those in the general instellar cloud material

DETERMINATION OF THE HNC TO HCN ABUNDANCE RATIO IN GIANT MOLECULAR CLOUDS

The lines of the rare isotopes (H-13)CN, H(C-15)N, H(N-13)C, and (H-15)NC, which are sufficiently weak to be little affected by saturation, are used to measure the relative abundance of the isomers HCN and HNC in four giant molecular clouds. The low values of the HNC/HCN abundance ratio, which range from 0.015 to 0.40, are (1) similar to those found in warm sources from the common isotopes by Wootten et al. (1978), (2) not consistent with HNC and HCN production solely from various sources of the precursor ion H2CN(+), and (3) indicate that another source of HCN is required in warm, giant molecular clouds. It is suggested that neutral atom-molecule reactions may be an important contribution to the HCN production rate in such regions