Browsing Química by Title
Now showing items 145-164 of 313
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Fast quantitative method for the analysis of carotenoids in transgenic maize
(American Chemical Society, 2013)A fast method was developed to determine carotenoid content in transgenic maize seeds. The analysis was carried out using an ultrahigh-pressure liquid chromatograph coupled to a photodiode array detector and a mass ... -
Fatty acid eutectic mixtures and derivatives from non-edible animal fat as phase change materials
(Royal Society of Chemistry, 2017)A set of compounds from non-edible fat waste was prepared and their thermal behavior was studied. The fat was hydrolyzed and crystallized in a simple and robust process to yield palmitic acid-stearic acid (PA-SA) mixtures. ... -
Firmness at harvest impacts postharvest fruit softening and internal browning development in mechanically damaged and non-damaged highbush blueberries (Vaccinium corymbosum L.)
(Frontiers Media, 2017-04-11)Fresh blueberries are very susceptible to mechanical damage, which limits postharvest life and firmness. Softening and susceptibility of cultivars 'Duke' and 'Brigitta' to developing internal browning (IB) after mechanical ... -
Foreword to the special issue from the Interfaces Against Pollution 2016 Conference: Environmental challenges and opportunities
(CSIRO Publishing, 2017-01-01) -
Free indium concentration determined with AGNES
(Elsevier, 2018)Indium is increasingly used in electronic devices, from which it can be mobilized towards environmental compartments. Speciation of In in waters is important for its direct ecotoxicological effects, as well as for the fate ... -
Free Zn2+ determination in natural freshwater of the Pyrenees: towards on-site measurements with AGNES
(CSIRO Publishing, 2015)An on-site methodology has been developed for the direct determination of free Zn2+ with AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) in freshwaters. This implementation includes: i) the use of screen ... -
Free Zn2+ determination in systems with Zn-Glutathione
(Elsevier, 2015-11-01)Zn-Glutathione speciation was studied applying the electrochemical technique AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) to determine the free zinc concentration. In titrations varying either pH, total ... -
From symmetric glycerol derivatives to dissymmetric chlorohydrins
(Molecular Diversity Preservation International, 2011)The anticipated worldwide increase in biodiesel production will result in an accumulation of glycerol for which there are insufficient conventional uses. The surplus of this by-product has increased rapidly during the last ... -
Fruit characteristics and cuticle triterpenes as related to postharvest quality of highbush blueberries
(Elsevier, 2016-09-15)Chilean fresh blueberries take 20-50 days to arrive by boat to the Northern hemisphere, softening and dehydration being the main defects upon arrival. The effect of maturity at harvest (75% blue, 100% blue, and overripe) ... -
Fruit cuticle composition of a melting and a nonmelting peach cultivar
(American Chemical Society, 2014-03-28)Although postharvest quality of fruit is greatly affected by cuticle composition, structure, and properties, very few published studies have analyzed fruit cuticle composition from a postharvest perspective. In this work, ... -
Full description of copper uptake by algal biomass combining an equilibrium NICA model with a kinetic intraparticle diffusion driving force approach
(Elsevier, 2011)In this work kinetic and equilibrium studies related to copper binding to the protonated macroalga Sargassum muticum are reported. An intraparticle-diffusion linear driving force (LDF) model has been chosen for the ... -
Full wave analysis of stripping chronopotentiometry at scanned deposition potential (SSCP): obtaining binding curves in labile heterogeneous macromolecular systems for any metal-toligand ratio.
(Elsevier, 2020)The different deposition potentials applied in Scanned Stripping ChronoPotentiometry (SSCP) probe different values of the free metal and complex concentrations at the electrode surface. The knowledge of these concentrations ... -
Full-wave analysis of stripping chronopotentiograms at scanned deposition potential (SSCP) as a tool for heavy metal speciation: Theoretical development and application to Cd(II)-phthalate and Cd(II)-iodide systems
(Elsevier, 2007)A new mathematical treatment has been developed and implemented in an EXCEL spreadsheet in order to determine average equilibrium functions from the full set of data measured by scanning stripping chronopotentiometry (SSCP) ... -
Gene and QTL detection in a three-way barley cross under selection by a mixed model with kinship information using SNPs
(Springer Verlag, 2011)Quantitative trait locus (QTL) detection is commonly performed by analysis of designed segregating populations derived from two inbred parental lines, where absence of selection, mutation and genetic drift is assumed. Even ... -
Gibbs-Donnan and specific ion interaction theory descriptions of the effect of ionic strength on proton dissociation of alginic acid
(Elsevier, 2004)The apparent proton dissociation constants of a commercial alginic acid have been obtained in KNO3 and NaCl at concentrations ranging between 0.01 and 2 mol·L-1. An analysis of the dependence on the ionic strength at a ... -
Glycerol as a starting material to prepare palmitate derivatives
(Asociación de Químicos e Ingenieros del Instituto Químico de Sarriá, 2007)Glycidyl palmitate, used to obtain high purity monoglycerides and epoxy resins, can be obtained from glycerol using a two-step process. The first step of this new approach consists in a reaction of esterification-chlorination ... -
H3PO4/metal halide induces a one-pot solvent-free esterification–halogenation of glycerol and diols
(Royal Society of Chemistry, 2013)As part of our continued effort to achieve the synthesis of halohydrin esters from polyols by a sustainable method, here we report on a multicomponent inorganic acid-mediated solvent-free synthesis. The synthesis was ... -
Heading date QTL in a spring × winter barley cross evaluated in Mediterranean environments
(Springer Verlag, 2008)Heading date is a key trait for the adaptation of barley to Mediterranean environments. We studied the genetic control of flowering time under Northern Spanish (Mediterranean) conditions using a new population derived from ... -
Heterochirality Restricts the Self-Assembly of Phenylalanine Dipeptides Capped with Highly Aromatic Groups
(American Chemical Society, 2020)The influence of stereochemistry on the self-assembly of phenylalanine (Phe) dipeptides bearing aromatic fluorenyl groups at both the N- and C-termini (Fmoc, OFm) has been investigated. For this purpose, Fmoc–d-Phe–l-Phe–OFm ... -
Hierarchical self-assembly of di-, tri- and tetraphenylalanine peptides capped with two fluorenyl functionalities: from polymorphs to dendrites
(Royal Society of Chemistry, 2016)Homopeptides with 2, 3 and 4 phenylalanine (Phe) residues and capped with fluorenylmethoxycarbonyl and fluorenylmethyl esters at the N-terminus and C-terminus, respectively, have been synthesized to examine their self-assembly ...