Mechanized instrumentation of root canals oscillating systems

Cleaning and shaping are important steps in the root canal treatment. Despite the technological advances in endodontics, K and Hedströen files are still widely used. In an attempt to be more effective in preparing the root canals, faster and more cutting efficient kinematic, alloys and design alternatives utilizing mechanically oscillating or rotary files are proposed. Even with all these technological innovating alternatives, the preparation of root canals remains a challenge.

La educación latinoamericana: exclusión o participación

Incluye Bibliografía

Una perspectiva histórica de la educación latinoamericana

Incluye Bibliografía

Educar o no educar: ¿es éste el dilema?

Incluye Bibliografía

El papel de la educación en relación con los problemas del empleo

Incluye Bibliografía

Desarrollo y educación en zonas rurales

Incluye Bibliografía

Modelo pedagógico y fracaso escolar

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Estilos de desarrollo y educación: un inventario de mitos, recomendaciones y potencialidades

Incluye Bibliografía

Perspectivas políticas de la educación y de la cultura: hipótesis sobre la importancia de la educación para el desarrollo

Incluye Bibliografía

Genetic Diversity in the Modern Horse Illustrated from Genome-Wide SNP Data

Horses were domesticated from the Eurasian steppes 5,000-6,000 years ago. Since then, the use of horses for transportation, warfare, and agriculture, as well as selection for desired traits and fitness, has resulted in diverse populations distributed across the world, many of which have become or are in the process of becoming formally organized into closed, breeding populations (breeds). This report describes the use of a genome-wide set of autosomal SNPs and 814 horses from 36 breeds to provide the first detailed description of equine breed diversity. FST calculations, parsimony, and distance analysis demonstrated relationships among the breeds that largely reflect geographic origins and known breed histories. Low levels of population divergence were observed between breeds that are relatively early on in the process of breed development, and between those with high levels of within-breed diversity, whether due to large population size, ongoing outcrossing, or large within-breed phenotypic diversity. Populations with low within-breed diversity included those which have experienced population bottlenecks, have been under intense selective pressure, or are closed populations with long breed histories. These results provide new insights into the relationships among and the diversity within breeds of horses. In addition these results will facilitate future genome-wide association studies and investigations into genomic targets of selection. © 2013 Petersen et al.

Education in Latin America: exclusion or participation

Includes bibliography

A historical perspective of Latin American education

Includes bibliography

To educate or not to educate: is that the question?

Includes bibliography

The role of education in relation to employment problems

Includes bibliography

Development and education in rural areas

Includes bibliography