منابع مشابه
Boletín de la Sociedad Chilena de Química
The surface and catalytic properties in the vapor-phase hydrogenation of crotonaldehyde on Rh/TiO2 has been studied. It was found that a partial reduction of the support produces a surface decoration of the metal component. Thus, interfacial sites are created, which are responsible of an increase in the selectivity to crotyl alcohol, via enhancement of the polarization of the C=O bond. Photoele...
متن کاملLa doctrina y el laboratorio: fisiología y experimentación en la sociedad española del siglo XIX
Vivian Nutton, in the first chapter, wrote a 43 page essay on the social history of medicine in ancient Greece and Rome that is the best introduction to this vast topic I have seen. Katharine Park's description of medicine and society in medieval Europe, a society more diverse than our own, she claims, tells us about a universe of disease and the various attempts to cope with the effects of suc...
متن کاملSistemas comunitarios de satisfacción a necesidades de conectividad en la sociedad de la información: el caso de Argentina
Este artículo se focaliza en la capacidad de las comunidades, mediante las iniciativas y acciones de diversos actores sociales, tanto privados como provenientes de la sociedad civil, para satisfacer sus necesidades con respecto al acceso a las herramientas de la Sociedad de la Información mediante innovaciones sociales y/o tecnológicas, en ausencia o insuficiencia de estrategias estatales. La h...
متن کاملSalud, cultura y sociedad en América Latina
Recent years have seen a rapid growth of interest in the history of tropical medicine, sparked by a number of academic and political developments. Imperialism is back on the scholarly agenda, leading us to ask how important empire was to science and medicine, and vice versa. Post-colonial studies raise questions about how the colonies were critical to the constitution or genealogy of science an...
متن کاملThree-Dimensional Sacrificial Etching
In MEMS fabrication micro-mechanical components have to be partially released from a substrate. Selectively etching away sacrificial layers, such that a free standing structure remains, is a widely used technique for this purpose. Free standing structures allow MEMS devices to induce or to sense mechanical movements or vibrations. During sacrificial etching lower etch rates than the blanket one...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Realidad: Revista de Ciencias Sociales y Humanidades
سال: 2017
ISSN: 2520-0526,1991-3516
DOI: 10.5377/realidad.v0i129.3267