Suchergebnisse

En este trabajo se selecciona el ano 2000 como fecha de referencia para evaluar los impactos de la biotecnologia en la economia mexicana. Se cuestiona en que sectores productivos nacionales las biotecnologias tendran su mayor aplicacion, indicando algunos aspectos cuantitativos. Finalmente se comenta el posible significado socio-economico y politico que tendra la introduccion de estas tecnologias en los paises del Tercer Mundo

• Resumen: La enseñanza de la economía en Colombia presenta en los actuales momentos deficiencias importantes. La rígida estructura curricular no ha permitido incorporar a los pensumes las discusiones más recientes en el campo de la teoría económica. Por otra parte, no hay suficientes esfuerzos para incorporar ésta al análisis de la realidad colombiana. En la parte final se hacen algunas propuestas que pueden permitir un fructífero debate sobre este importante asunto. • Abstract: At the moment the teaching of economics in Colombia exhibits very significant deficiencies. Curricular structure inflexibility has prevented recent theoretical discussions in economics of being included in the study programs. There is as well a lack of effort to incorporate that theory to the analysis of the Colombian economy. Finally we make some alternative propositions, hoping that they will allow a fruitful debate.

The purification of the internal ambient air of the "Latacunga Cheese" factory was studied by the application of ozone. It is an energetic oxidizing agent which is able to kill the microorganisms present in the medium where it is found. It is applied in its appropriate doses with the aim of purifying the air environment of the workshop. The concentrations of fungi and bacteria found before the application of ozone were higher than that allowed by the Spanish legislation "UNE 100012 Hygiene of systems". Among the fungi identified were Aspergillus sp., Penicilium sp., Scopulariopsis sp., Fusarium sp., and Cladosporium sp. The major bacteria identified were Staphylococcus sp., Streptococcus sp., Bacillus sp., Streptomyces sp., and Enterobacter agglomerans. The main material used for the treatment of indoor air with ozone was a SEFILTRA purifier. This purifier, however, generates an ozonated air flow rate of 2 dm3 / min with an ozone concentration in air of 9.5 g / m3. This means it has an ozone charge of about 1.14 g / hr. A High Efficiency Particle Arresting (99.995%) filter was used to measure microbial air content before and after treatment. After an hour of application of ozone, the reduction of fungi was sufficient to ensure that its presence was complied with the maximum limit established in the legislation in question. However, this does not happen with bacteria which needs about 25 minutes more to conclude which is the same as for fungi.