Listar Química por título
Mostrando ítems 34-53 de 360
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Aprovechamiento de los desechos de la industria del anodizado de aluminio en la síntesis de zeotipos tipo AlPO4-X y aplicación de estos en la captura de amoniaco
(2020)La finalidad de este trabajo fue llevar a cabo la síntesis de zeotipos tipo AlPO4-X utilizando desechos provenientes de la industria de anodizado de aluminio (DAAl-1) en sustitución de la fuente de aluminio, estos desechos ... -
ArsH protects Pseudomonas putida from oxidative damage caused by exposure to arsenic
(2020-03-23)The two As resistance arsRBC operons of Pseudomonas putida KT2440 are followed by a downstream gene called arsH that encodes an NADPH‐dependent flavin mononucleotide reductase. In this work, we show that the arsH1 and (to ... -
Aspectos prácticos de la validación e incertidumbre en mediciones químicas
(Buenos Aires, Argentina, 2009)En este libro se abordan dos temas relacionados con uno de los más importantes aspectos en lo relativo a la calidad de la información generada por un laboratorio de análisis químico: la validación de los métodos utilizados, ... -
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 ... -
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 ... -
Bile salts and derivatives: Rigid unconventional amphiphiles as dispersants, carriers and superstructure building blocks
(2015)Steroidal surfactants like bile salts have a rigid amphiphilic structure significantly different from the typical head–tail one. As a result, these molecules show peculiar features in their self-assembly behavior and ... -
Bioactivity of prenylated hydroxybenzoic acids from Piper garagaranum C. DC
(2022)A bio-assay guided fractionation of Piper garagaranum C. DC. led to the isolation of two prenylated hydroxybenzoic acids (1-2) with anti-inflammatory and cytotoxic activities. The anti-inflammatory action was determined in ... -
Bioassay-guided isolation of anti-inflammatory O-sulfated withanolides from Acnistus arborescens (Solanaceae)
(2019)Bioassay-guided fractionation of Acnistus arborescens (Solanaceae) organic extract afforded two anti-inflammatory withanolides: 2,3-Dihydro-3β-O-sulfate withacnistin (1) and 2,3-Dihydro-3β-O-sulfate withaferin A (2) showing ... -
Bioavailability of Xenobiotics in the Soil Environment
(2010)When synthetic, xenobiotic compounds such as agrochemicals and industrial chemicals are utilized, they eventually reach the soil environment where they are subject to degradation, leaching, volatilization, sorption, and ... -
Biodegradation of Pharmaceuticals by Fungi and Metabolites Identification
(2012-01-01)Pharmaceutical compounds comprise a widely employed group of therapeutic agents now considered as emerging micropollutants. This chapter summarizes the state of the art in the degradation of pharmaceuticals by fungi ... -
Biodiversity for Bioindustries
(1997)Biodiversity refers to the variety and variability of living material and ecological complexes in a given area and comprises species, genetic and ecosystem diversity. Biodiversity is not only the basis of life on earth, ... -
Biodiversity Prospecting: The INBio Experience
(2004)Bioprospecting is defined as the systematic search for genes, compounds, designs, and organisms that might have a potential economic use and might lead to a product development. In 1991, Costa Rica's National Institute of ... -
Bioprospecting
(2001)Bioprospecting is the systematic search for genes, natural compounds designs and whole organisms in wild life with a potential for product development by biological observation and biophsical, biochemical, and genetic ... -
Biosensor for Aluminum(III) Based on α-Chymotrypsin Inhibition using a Disposable Screen-Printed Carbon Electrode and Acetyl-Tyrosine Ethyl Ester as Substrate
(2015)We report on a new amperometric assay for Al(III) ions based on the inhibition of α-chymotrypsin enzyme. The immobilization of the enzyme was performed on screen-printed carbon electrodes modified with gold nanoparticles ... -
Bis(μ2-benzoato-κ2O,O′)bis(benzoato-κO)bis(ethanol-κO)bis(μ3-hydroxido)hexakis(μ-pyrazolato-κ2N,N′)hexacopper(II) ethanol disolvate
(2019)Trinuclear copper–pyrazolate entities are present in various Cu-based enzymes and nanojar supramolecular arrangements. The reaction of copper(II) chloride with pyrazole (pzH) and sodium benzoate (benzNa) assisted by ... -
Bocaparvovirus, Erythroparvovirus and Tetraparvovirus in New World Primates from Central America
(2020)Parvoviruses in the genera Bocaparvovirus (HBoV), Erythroparvovirus (B19) and Tetraparvovirus (PARV4) are the only autonomous parvoviruses known to be associated with human and non‐human primates based on studies and ... -
Boron adsorption to ferrihydrite with implications for surface speciation in soils: Experiments and modeling
(2020-07-29)The adsorption and desorption of boric acid onto reactive materials such as metal (hydr)oxides and natural organic matter are generally considered to be controlling processes for the leaching and bioavailability of boron ... -
Calidad del Aire en la Sede Central Rodrigo Facio de la Universidad De Costa Rica
(2014-12)Este estudio vigiló la calidad del aire en la Sede Universitaria Rodrigo Facio de la Universidad de Costa Rica con el fin de mantener informadas a las autoridades universitarias, cantonales, del Ministerio de Ambiente y ... -
Caracterización bioquímica y espectroscópica de la interacción del aptámero con componentes de la espora de clostridium difficile y la superficie de óxido de grafeno
(2023)Clostridioides difficile es un patógeno bacteriano formador de endosporas que causa infecciones asociadas al uso de antibióticos, primordialmente en entornos clínicos. Las esporas de C. difficile son altamente resistentes ... -
Caracterización de la calidad del agua de la Quebrada Sanatorio en Tierra Blanca ubicada en una zona agrícola de la provincia de Cartago y sus implicaciones para la salud pública
(2012-10)Se monitoreó la calidad del agua de la Quebrada Sanatorio (Tierra Blanca, Cartago, Costa Rica), durante abril, junio, agos to y octubre de 2011. Se establecieron tres puntos de muestreo utilizando una metodología de ...