Listar Artículos de revista - Aldizkari artikuluak por autor UPNA "Echeverría Morrás, Jesús"
Mostrando ítems 1-12 de 12
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Bioavailability of heavy metals in soils amended with sewage sludge
The recycling of sewage sludge to agricultural land results in the slow accumulation of potentially toxic heavy metals in soils. A greenhouse experiment was conducted to determine the bioavailability of Cu, Ni, Pb and ... -
Comprehensive kinetics of hydrolysis of organotriethoxysilanes by 29Si NMR
The kinetics of several representative hybrid precursors were studied via 29Si NMR: three alkyl precursors, methyltriethoxysilane, ethyltriethoxysilane, and propyltriethoxysilane; as well as two unsaturated radicals, ... -
Dynamic testing in columns for soil heavy metal removal for a car park SUDS
The increase in urban runoff brought about by a rise in impermeable surfaces has triggered the alteration and pollution of many aquatic systems. The overall goal of this research was to design a ‘Sustainable Urban Drainage ... -
Effect of Cu substitution on the magnetic and magnetic induction heating response of CdFe₂O₄ spinel ferrite
In this work, a comparative study of the effect of Cu on the structural, magnetic and magnetic induction heating response in CdFe2O4 spinel is presented. The ceramic nanoparticles (Cu1−xCdxFe2O4; 0 ≤ x ≤ 1) were synthesized ... -
Estrategias del alumnado de Educación Secundaria para estimar la densidad
La densidad, o concentración de materia, es un concepto muy relevante pero que genera muchas dificultades de comprensión. Para medir la competencia en la estimación de la densidad del alumnado de la ESO, se pasó un ... -
Kinetics of the acid-catalyzed hydrolysis of tetraethoxysilane (TEOS) by 29Si NMR spectroscopy and mathematical modeling
Tetraethoxysilane (TEOS) is widely used to synthesize siliceous material by the sol–gel process. However, there is still some disagreement about the nature of the limiting step in the hydrolysis and condensation reactions. ... -
Mid-infrared spectroscopy (MIR) for simultaneous determination of fat and protein content in meat of several animal species
The aim of this research was to study the application of MIR spectroscopy as an alternative to conventional methods to determine fat and protein content. Samples of the main species used to produce meat products were ... -
Mobility of heavy metals in soils amended with sewage sludge
Sewage sludges added to arable land can improve soil fertility and physical properties. However, the concentrations of heavy metals commonly found in sludges limits their application to soil. The purpose of this paper is ... -
Phenyl siloxane hybrid xerogels: structure and porous texture
The aim of this research is to investigate the effect of phenyltriethoxysilane (PhTEOS) and tetraethoxysilane (TEOS) molar ratios as silicon precursors on the structure and porous texture of xerogels. We have prepared ... -
Steering the synthesis of Fe3O4 nanoparticles under sonication by using a fractional factorial design
Superparamagnetic iron oxide nanoparticles (MNPs) have the potential to act as heat sources in magnetic hyperthermia. The key parameter for this application is the specific absorption rate (SAR), which must be as large as ... -
Strategies for fabrication of hydrogen peroxide sensors based on electrostatic self-assembly (ESA) method
An optical fiber sensor has been fabricated for detection of 5 M–0.1mM concentrations of hydrogen peroxide with a linear response. The deposition method used is electrostatic self-assembly (ESA) of polymer cationic and ... -
Tenderness of PGI "Ternera de Navarra" beef samples determined by FTIR-MIR spectroscopy
Understanding meat quality attribute changes during ageing by using non-destructive techniques is an emergent pursuit in the agroindustry research field. Using beef certified samples from the protected geographical indication ...