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Composites of carbon nanofibers and thermoplastic polyurethanes with shape-memory properties prepared by chaotic mixing
(Wiley Inter Science, 2009)
Composites of carbon nanofibers (CNFs), oxidized car bon nanofibers (ox-CNFs), and shape-memory thermo plastic polyurethane (TPU) were prepared in a chaotic
mixer and their shape-memory properties evaluated.
The polymer ...
Kinetics of anaerobic degradation of screened dairy manure by upflow fixed bed digesters: Effect of natural zeolite addition
(Taylor & Francis, 2009)
The effect of the hydraulic retention time (HRT) on the performance of two up-flow anaerobic fixed bed digesters (UFAFBDs) packed with waste tire rubber (D1) and waste tire rubber and zeolite (D2) as micro-organism ...
Influence of iron oxide nanoparticles on the rheological properties of hybrid chitosan ferrogels
(Elsevier, 2009)
Magnetite nanoparticles have been successfully synthesized in the presence of chitosan using an in situ
coprecipitation method in alkali media. This method allows obtaining chitosan ferrogels due to the simul taneous ...
Manejo de Mercancías Químicas peligrosas en puerto Caldera, Puntarenas, Costa Rica
(Universidad Nacional (Costa Rica), 2009)
Puerto Caldera, ubicado en Puntarenas, Costa Rica, en uno de los puertos más importantes de Centroamérica, ya que a través de él se trasiegan por año aproximadamente 1.5 millones de toneladas métricas de carga de diferentes ...
Determinación de la concentración de sólidos suspendidos totales (SST) y metales pesados en la cuenca del Río Morote, Nicoya, Guanacaste
(Universidad Nacional (Costa Rica), 2009)
Se determinó la concentración de solidos suspendidos totales y metales pesados en la cuenca del río Morote. El estudio abarco seis campañas de muestreo entre abril del 2003 y mayo del 2005. Los puntos de muestreos seleccionados ...