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Electrochemical biosensor for quantitative determination of fentanyl based on immobilized cytochrome c on multi-walled carbon nanotubes modified screen-printed carbon electrodes
(2022)
Fentanyl is a powerful synthetic opioid used to treat severe pain. New administration routes toward its illegal consumption
for recreational purposes pose a growing threat to public health, either due to misuse or abuse ...
Assessing the reactive surface area of soils and the association of soil organic carbon with natural oxide nanoparticles using ferrihydrite as proxy
(2020-09-09)
Assessment of the surface reactivity of natural metal-(hydr)oxide nanoparticles is necessary for predicting ion adsorption phenomena in soils using surface complexation modeling. Here, we describe how the equilibrium ...
Predation of the Rolled-Leaf Beetle Cephaloleia kressi García-Robledo (Coleoptera: Chrysomelidae: Cassidinae) by the Rove Beetle Phanolinus Sp. (Coleoptera: Staphylinidae: Xanthopygina) in a Montane Forest of Costa Rica
(2020-12-22)
The genus Cephaloleia Chevrolat includes 215 species, known as rolled-leaf beetles, all of which are restricted to the Neotropics (Garcı́a-Robledo et al. 2015; Staines and Garcı́a-Robledo 2014). These beetles complete their ...
Alkaloid contents in members of Lycopodiales
(2001)
The composition of alkaloids in fifteen species that belong to the Lycopodiales, which grow wild in Costa Rica were analysed by gas chromatography coupled with mass spectrometry. Several alkaloids were identified, ...
Tetraaquabis(2,3-dihydro-1,4-benzodioxine-2-carboxylato)calcium(II)
(2020)
The acid–base reaction of 1,4-benzodioxane 2-carboxylic acid with calcium carbonate furnished the centrosymmetric title compound, [Ca(C9H7O4)2(H2O)4], in which the metal ion is octahedrally coordinated by two monodentate ...
Baulamycins A and B, Broad-Spectrum Antibiotics Identified as Inhibitors of Siderophore Biosynthesis in Staphylococcus aureus and Bacillus anthracis
(2014)
Siderophores are high-affinity iron chelators produced by microorganisms and frequently contribute to the virulence of human pathogens. Targeted inhibition of the biosynthesis of siderophores staphyloferrin B of Staphylococcus ...
Residuos, Degradación y Persistencia del Fungicida Maneb en Patatas en Costa Rica
(1983)
Residues of the fungicide maneb (manganese-1,2-ethylen-bisdithiocarbamate) were analyzed by the carbondisulfide evolution method in samples of potatoes, potato leaves and soil from a commercial crop located in Llano Grande ...
Operando tracking of oxidation-state changes by coupling electrochemistry with time-resolved X-ray absorption spectroscopy demonstrated for water oxidation by a cobalt-based catalysts film
(2021)
Transition metal oxides are promising electrocatalysts for water oxidation, i.e., the oxygen evolution reaction (OER), which is
critical in electrochemical production of non-fossil fuels. The involvement of oxidation state ...