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Catalytic conversion of biomass renewable feedstocks to platform molecules using Brønsted acid catalysts
(2018-05)
The fractionation of sugarcane bagasse, plantain peel and brewer’s spent grains to
glucose, xylose and lignin was studied using 0.50 and 0.05 wt% H2SO4 as catalyst in a
mixture of 80:20 wt% γ-valerolactone:water. We ...
Effect of protic and aprotic polar solvents on the heterogeneous catalytic conversion of hexoses
(2018-12-12)
We studied the synthesis, the characterization and the solvent effect on the catalytic performance of materials with Brønsted or Lewis acidity on the hexose conversion towards value-added molecules such as 5-(hydroxymeth ...
Studies of ferrite based magnetic nanoparticle uptake and magnetocytolysis effects on model cell cultures
(2009)
Suspended ferrite magnetic nanoparticles are known to dissipate energy under an oscillating magnetic field. Such energy dissipation could be employed to locally raise temperature inside a tumor to 41-45°C (hyperthermia), ...
Stable colloidal dispersions of magnetic nanoparticles in aqueous media and polymer melts
(2009)
The work presented as part of this thesis describes a process to obtain two types of conventionally used magnetic nanoparticles, magnetite and cobalt ferrite, with a narrow size distribution that can be suspended in aqueous ...
Synthesis and characterization of sulfonated amine block copolymer membranes for fuel cells and specialty separations applications
(2021-07-09)
This work focuses on the synthesis and characterization of block copolymers membranes with multi-ionic domains to analyze the effect of the morphological and chemical changes on the transport properties for their use in ...
Particle flow promoted by external forces in a confined space – feed frame case
(2014)
Pharmaceutical tablets are the most sold and preferred drug solid dosage form due to its many advantages. The feed frame was designed to transfer the powder from the hopper to the tablet press dies as the die disk rotates. ...
Ferrohydrodynamics studies through Brownian dynamics simulations of spherical nanoparticle suspensions
(2012)
In this contribution, Brownian dynamics simulations of spherical, thermally blocked, magnetic nanoparticles under applied shear and magnetic fields were studied. Equilibrium and dynamical properties as well as rheological ...
Sulfonated fluoroblock copolymer membranes for direct methanol fuel cell applications
(2014)
This investigation studied the transport properties of several fluorinated sulfonated membranes for direct methanol fuel cell applications. First, Nafion® membranes were processed with supercritical fluid (SCF) CO2 and ...
Rheology and gelation of physical polymer gels
(2011)
The discovery of new potent and water-insoluble drugs has emphasized the need for novel drug-delivery systems and personalized dosification. Biopolymers solutions are an alternative over conventional methods since they can ...
Observation of enhanced Raman scattering as a result of coupling between localized plasmons and surface polariton waves associated with metal-semiconductor nanocomposites
(2011-05)
We report the observation of enhanced Raman scattering as a result of the coupling between the localized surface plasmon (LSP) of metal nanoparticles (NP) and the surface plasmon polariton (SPP) associated with a thin metal ...