Browsing Articles publicats (Química) by Title
Now showing items 28-47 of 313
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Antioxidant Capacity Assessment of Plant Extracts for Green Synthesis of Nanoparticles
(MDPI, 2021)In this work, water extracts from different bio-based products of plant origin were studied to evaluate their antioxidant capacity and their potential to form metal nanoparticles from aqueous solutions. Two traditional ... -
Application of Danckwerts' expression to first-order EC′reactions. Transient currents at inlaid and recessed microdisc electrodes
(Elsevier, 1999)A general relationship, arising from Danckwerts' expression (P.V. Danckwerts, Trans. Faraday Soc. 47 (1951) 1014), allows the computation of the transient limiting current in a system with a homogeneous first-order reaction ... -
Application of the new electroanalytical technique AGNES for the determination of free Zn concentration in river water
(Springer Verlag, 2010)Absence of gradients and Nernstian equilibrium stripping (AGNES) is a recently developed electroanalytical technique specifically designed for the direct determination of free concentrations of metal ions. AGNES is applied ... -
Arctic - Atlantic Exchange of the Dissolved Micronutrients Iron, Manganese, Cobalt, Nickel, Copper and Zinc With a Focus on Fram Strait
(Wiley; American Geophysical Union, 2022-04-28)The Arctic Ocean is considered a source of micronutrients to the Nordic Seas and the North Atlantic Ocean through the gateway of Fram Strait (FS). However, there is a paucity of trace element data from across the Arctic ... -
Assessment of labilities of metal complexes with the dynamic ion exchange technique
(CSIRO Publishing, 2019)The dynamic ion exchange technique (DIET) is proposed to provide speciation information, which can be used to establish links with metal bioavailability in natural waters. The experimental setup consists of a few milligrams ... -
Assessment of trace metal binding kinetics in the resin phase of diffusive gradients in thin films
(Elsevier, 2012)The dynamic technique of diffusive gradients in thin films (DGT), that measures metal speciation in situ, has found wide environmental application. Simple interpretation of the metal accumulation in terms of a solution ... -
Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
(Elsevier, 2021-07)The analytical technique DGT (Diffusive Gradients in Thin-films) is able to gain access to a wealth of information by carefully interpreting accumulation data from passive samplers with different configurations (i.e. ... -
Barley β-glucan accelerates wound healing by favoring migration versus proliferation of human dermal fibroblasts
(Elsevier, 2019)β-Glucans are considered candidates for the medication in different human pathologies. In this work, we have purified β-glucan from a selected barley line and tested their effects in primary human dermal fibroblasts. ... -
Behaviour of the current in a membrane-covered disc microelectrode under steady-state conditions
(The Royal Society of Chemistry, 1996)The inlaid disc electrode covered with a membrane can be modelled as a system with axial symmetry containing several parallel layers with different permeabilities. A recent solution of the steady state under diffusion ... -
Bioactive Compounds and Antioxidant Capacity in Pearling Fractions of Hulled, Partially Hull-Less and Hull-Less Food Barley Genotypes
(MDPI, 2021-03-09)Three food barley genotypes differing in the presence or absence of husks were sequentially pearled and their fractions analyzed for ash, proteins, bioactive compounds and antioxidant capacity in order to identify potential ... -
Bioactividad de extractos de Melia azedarach L. sobre el taladro del maíz Sesamia nonagrioides Lef.
(Espanya. Ministerio de Medio Ambiente y Medio Rural y Marino, 1996)A partir de un extracto metanólico de semillas de Melia azedarach se han aislado los compuestos responsables de su actividad biológica como agentes inhibidores de la alimentación y reguladores del desarrollo sobre Sesamia ... -
Bioadsorción de carbón activo por materiales alternativos al carbón activo
(2008-09-01)La eliminación de metales presentes en aguas mediante bioadsorción es una alternativa al tratamiento convencional (precipitación decantación) de prometedoras expectativas. En este trabajo a escala de laboratorio se tratan ... -
Biocatalytic preparation of dichloropropyl acrylates. Application to the synthesis of poly(dichloropropyl acrylates)
(Elsevier, 2013)The synthesis of dichloropropyl acrylates from dichloropropyl dodecanoates through a transesterification process using diverse commercial lipases and whole cells (fungal resting cells) is presented. The synthesis was carried ... -
Biocatalytic Transformation of 5-Hydroxymethylfurfural into 2,5-di(hydroxymethyl)furan by a Newly Isolated Fusarium striatum Strain
(MDPI, 2021-02-06)The compound 2,5-di(hydroxymethyl)furan (DHMF) is a high-value chemical block that can be synthesized from 5-hydroxymethylfurfural (HMF), a platform chemical that results from the dehydration of biomass-derived carbohydrates. ... -
Biomarkers, matrices and analytical methods targeting human exposure to chemicals selected for a European human biomonitoring initiative
(Elsevier, 2020-11-20)The major purpose of human biomonitoring is the mapping and assessment of human exposure to chemicals. The European initiative HBM4EU has prioritized seven substance groups and two metals relevant for human exposure: ... -
Biosorption of cadmium by the protonated macroalga Sargassum muticum: Binding analysis with a nonideal, competitive, and thermodynamically consistent adsorption (NICCA) model
(Elsevier, 2005)Protonated biomass of the seaweed Sargassum muticum was investigated for its ability to remove cadmium(II) from aqueous solutions. In this work, a nonideal, semiempirical, thermodynamically consistent (NICCA) isotherm was ... -
Blueberry production in Chile: Current Status and Future Developments
(Sociedade Brasileira de Fruticultura, 2014)Chile has become a major actor in the blueberry industry as the most important supplier of off-season fresh fruit for the northern hemisphere. Blueberry exports passed from US$ 30 million (around 4,000 tons) in 2000 to US$ ... -
[BMIM][PF6] Promotes the synthesis of halohydrin esters from diols using potassium halides
(Japan Society for Analytical Chemistry, 2008)Haloesterification of diverse diols with various carboxylic acids was achieved using potassium halides (KX) as the only halide source in ionic liquids. The best yield was obtained in [BMIM][PF6] when 1,2-octanediol, palmitic ... -
Brownian Dynamics Computational Model of Protein Diffusion in Crowded Media with Dextran Macromolecules as Obstacles
(MDPI, 2017-03-09)The high concentration of macromolecules (i.e., macromolecular crowding) in cellular environments leads to large quantitative effects on the dynamic and equilibrium biological properties. These effects have been experimentally ... -
Building bridges: an integrated strategy for sustainable food production throughout the value chain
(Springer, 2013)The food production and processing value chain is under pressure from all sides-increasing demand driven by a growing and more affluent population; dwindling resources caused by urbanization, land erosion, pollution and ...