Browsing Química by Title
Now showing items 21-40 of 313
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Amyloid fibrils from organic solutions of an amphiphilic dipeptide
(Royal Society of Chemistry, 2019)Non-hydrated organic solutions of a diphenylalanine amphiphile blocked at the C-terminus with a fluorenylmethyl ester and stabilized at the N-terminus with a trifluoroacetate have been used to prepare amyloid fibrils. The ... -
An evaluation of the life cycle cost of rapeseed oil as a straight vegetable oil fuel to replace petroleum diesel in agriculture
(Elsevier, 2011-08)The use of straight vegetable oil (SVO) as biofuel has been recognized as a valid substitute of diesel fuel in the agricultural sector under specific circumstances. Its direct use reduces most of the chemical processes ... -
An in vitro system for the rapid functional characterization of genes involved in carotenoid biosynthesis and accumulation
(Wiley, 2014)We have developed an assay based on rice embryogenic callus for rapid functional characterization of metabolic genes. We validated the assay using a selection of well-characterized genes with known functions in the carotenoid ... -
Analytical solution for the steady-state diffusion towards an inlaid disc microelectrode in a multi-layered medium
(Elsevier Science, 1997)The rigorous analytical expression for the steady-state diffusion-limited current produced by an electroactive species diffusing towards an inlaid disc electrode through a multi-layered medium (such as the membrane covered ... -
Analytical tools for the analysis of carotenoids in diverse materials
(Elsevier, 2012)High-performance liquid chromatography (HPLC) has become the method of choice for carotenoid analysis. Although a number of normal-phase columns have been reported, reverse-phase columns are the most widely used stationary ... -
Antennal and Behavioral Response of Cydia pomonella and Lobesia botrana Moths to Allyl Cinnamate
(OMICS International, 2014-11-10)Electroantenographical (EAG) response to allyl cinnamate were assessed on virgin and mated Cydia pomonella and Lobesia botrana adults to determine whether this compound could be used within integrated management programs ... -
Antimony speciation in aqueous solution followed with AGNES
(Elsevier, 2019-09-29)Determining antimony speciation is essential to understand its environmental behaviour and potential (eco)toxicological effects. Absence of Gradients and Nemstian Equilibrium Stripping (AGNES) is an electroanalytical ... -
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 ...