Laccase from Dichostereum sordulentum was entrapped in hydrogels formed using lignocellulosic residues from bioethanol production and ionic liquids. The active hydrogel was efficient in ethinylestradiol removal.
Alternate bearing in citrus trees has been extensively studied as a key feature for citrus growers. Although the genetic and the biochemical process occurring during alternate bearing has been studied extensively, there is a lack of information identifying the presence of metabolic indicators during “on” and “off” years. In citrus plants, leaves play a central role in the metabolic pathway triggering the flowering induction process. To investigate the changes during this transition, a liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) analysis of the leaf profiles of 20 compounds (17 polyphenols, two limonoids, and one furanocoumarin), in bearing and non-bearing branches arising from four different mandarin genotypes, was performed. The same metabolites were found in all the genotypes at both stages: both limonoids and 11 polyphenols. Using these compounds, the chemotaxonomic differentiation between cultivars was assessed. The levels of flavanones and limonoids showed differences in both bearing stages and the transition from vegetative to flowering could be shown by the activation of the polyphenol biosynthetic pathway, from precursors like naringenin to metabolic end-points such as narirutin and polymethoxyflavones. Narirutin levels showed significant differences between both stages, suggesting it as a possible marker of the physiological status of the branch.
RESUMENHoy en día el concepto de vida útil se utiliza mucho en todo el mundo, ya que la intención de los profesionales de la construcción es ejecutar proyectos que tengan una vida prolongada de servicio cumpliendo con los fines previstos bajo ciertos niveles de mantenimiento preventivo. En otros países desde hace casi dos décadas, se han ejecutado investigaciones sobre la durabilidad y vida útil de materiales y en su conjunto aplicado a edificaciones, para determinar cuáles son los problemas encontrados, y así poder proyectar obras técnicamente más efectivas y sustentables en el tiempo. Con el presente trabajo se propone determinar una Metodología aplicable al Paraguay, con el objetivo de estimar la vida útil de las viviendas utilizando el método ponderado como eje articulador del estudio.Palabras clave: Vida útil; ponderación; senavitat; carbonatación; método de factores.ABSTRACTToday the concept of Service Life is used widely around the world, and that the intention of building professionals is to implement projects that have a long service life to meet the purposes set out below certain levels of preventive maintenance. In other countries for almost two decades, investigations have been conducted on the durability and service life of materials and applied to buildings as a whole to determine which are the problems encountered, and so to project works far more effective and sustainable over time. The present work aims to determine a methodology applicable to Paraguay in order to estimate the useful life of the housing using the weighted method as articulating axis of the study.Keywords: Life pan; weighting; senavitat; carbonation; factor method.
En este trabajo se muestran los resultados relacionados con el proceso de extraer características en imágenes digitales que contienen lesiones de piel. Estos resultados son parte de un proceso más amplio que considera la tarea de clasificar lesiones de piel a través de un dispositivo móvil. Se explica el proceso utilizado para detectar la región de interés (ROI), así como las principales características que se consideran y cómo éstas nos pueden ayudar a dar una mejor clasificación de una lesión de piel tipo melanoma. Se plantea una metodología basada en el procesamiento de imágenes en la cual se utilizan -por el momento las tres primeras fases (preprocesamiento, segmentación y la extracción de características) los resultados obtenidos en este proceso se consideran por el momento satisfactorios.
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