Biodiesel de segunda generación a partir de aceite comestible de desecho

 En los últimos años, ha sido de gran interés el estudio de la generación de biodiesel usando enzimas como catalizadores. Estudios recientes muestran la capacidad de la lipasa del látex de Araujia sericifera (Apocynaceae) (ASL) como catalizador en reacciones de hidrólisis y esterificación de ácidos grasos

A Proposal for a Detector 2 km Away From the T2K Neutrino Source

We propose building a detector site 2km from the neutrino production point of the the T2K experiment. At this distance, almost the same neutrino flux is measured as that seen at Super-K 295 km away. We propose to measure this flux with both a 1 kton water Cherenkov detector which has been optimized to match Super-K resolution, and a 100 ton fiducial volume liquid argon time projection chamber which will provide fine grain imaging and low particle detection thresholds for a precise study of neutrino interactions at the relevant energies. High energy muons which exit the water Cherenkov detector will be measured by an iron muon ranger. In this document, we show that combination of a detector made with the same target as Super-K, with almost the same detector response, and an extremely fine-grained tracking chamber sited in the off-axis beam, will allow us to predict the events seen at Super-K with very little correction other than that of geometric acceptance

Remediación de aguas empleando catalizadores con vistas al desarrollo de un sistema integrado para la potabilización de aguas contaminadas con oxoaniones

Se estudió la eliminación de los oxoaniones NO3-, NO2- y BrO3- en muestras de agua sintética y real, empleando catalizadores en polvo y estructurados usando PdCu como fase activa soportados sobre materiales con características redox a base de CeO2  pura o modificada con 10%p/p ZrO2 (10ZrCe) y H2 como agente reductor. Se determinó por las técnicas de caracterización DRX, Raman, FTIR y TPR que los soportes CeO2 y 10ZrCe poseen vacancias de oxígeno siendo mayores en el soporte modificado con ZrO2 por la presencia de iones Zr4+ en la red de CeO2

Pileup mitigation at CMS in 13 TeV data

With increasing instantaneous luminosity at the LHC come additional reconstruction challenges. At high luminosity, many collisions occur simultaneously within one proton-proton bunch crossing. The isolation of an interesting collision from the additional "pileup" collisions is needed for effective physics performance. In the CMS Collaboration, several techniques capable of mitigating the impact of these pileup collisions have been developed. Such methods include charged-hadron subtraction, pileup jet identification, isospin-based neutral particle "δβ" correction, and, most recently, pileup per particle identification. This paper surveys the performance of these techniques for jet and missing transverse momentum reconstruction, as well as muon isolation. The analysis makes use of data corresponding to 35.9 fb$^{-1}$ collected with the CMS experiment in 2016 at a center-of-mass energy of 13 TeV. The performance of each algorithm is discussed for up to 70 simultaneous collisions per bunch crossing. Significant improvements are found in the identification of pileup jets, the jet energy, mass, and angular resolution, missing transverse momentum resolution, and muon isolation when using pileup per particle identification