Informe ejecutivo estudio de competencia base de datos

Banco del conocimiento

Cómo crear negocios para la base de la pirámide

Bogotá Emprende

Generalidades y Tendencias en el Uso de Base Datos Única para la Prestación de Servicios al Ciudadano

Gestión del conocimiento

Plan estratégico exportador para la región 2007 - 2019 Bogotá - Cundinamarca : Base Técnica

Gestión del conocimiento

Generalidades y Tendencias en el Uso de Base Datos Única para la Prestación de Servicios al Ciudadano

Gestión del conocimiento

Resolución N° 93 ¿Cuáles son los elementos con base en los que la Cámara de Comercio interpreta la exigencia de autenticación de firmas frente a los trámites presentados para registro?

Servicios registrales

Resolución N° 137 ¿Cuál es el alcance del control de legalidad de la cámara de comercio respecto de los actos y documentos sujetos a registro? ¿Cuándo existe duda razonable respecto de los elementos formales con base en los que se configuro una decisión pueden constituirse como causal de abstención del registro?

Servicios registrales

Significance of DNA base excision repair in the maintenance of mitochondrial function in Saccharomyces cerevisiae /

Mitochondria have an important role in cell metabolism, being the major site of ATP production via oxidative phosphorylation (OXPHOS). Accumulation of mtDNA mutations have been linked to the development of respiratory dysfunction, apoptosis, and aging. Base excision repair (BER) is the major and the only certain repair pathway existing in mitochondria that is in responsible for removing and repairing various base modifications as well as abasic sites (AP sites). In this research, Saccharomyces cerevisiae (S. cerevisiae) BER gene knockout strains, including 3 single DNA glycosylase gene knockout strains and Ap endonuclease (Apn 1 p) knockout strain were used to examine the importance of this DNA repair pathway to the maintenance of respiratory function. Here, I show that individual DNA glycosylases are nonessential in maintenance of normal function in yeast mitochondria, corroborating with previous research in mammalian experimental models. The yeast strain lacking Apn 1 p activity exhibits respiratory deficits, including inefficient and significantly low intracellular ATP level, which maybe due to partial uncoupling of OXPHOS. Growth of this yeast strain on respiratory medium is inhibited, but no evidence was found for increased ROS level in Apn 1 p mitochondria. This strain also shows an increased cell size, and this observation combined with an uncoupled OXPHOS may indicate a premature aging in the Apnlp knockout strain, but more evidence is needed to support this hypothesis. However, the BER is necessary for maintenance of mitochondrial function in respiring S.cerevisiae.

Selected topics in fast atom bombardment (FAB) mass spectrometry a)specially designed probe tips and ion generation, b)structures of vitamin B6 schiff base complexes

This thesis can be broken down into two sections. Section one is a study . of the ionization mechanisms and the ion source optimization for Fast Atom Bombardment (FAB) ionization. For this study, several specially designed probe tips were created and tested under various experimental conditions. The aIm of this section is to understand the operating characteristics of a FAB IOn source better. The second section involves the study of several Vitamin B6 Schiff Base complexes using both positive and negative ion FAB MS. This section is an exploration of the usefulness of FAB MS as a structure probe for the metalcoordination complexes of Vitamin B6.