81 research outputs found

    Colour Evolution of Rosé Wines after Bottling

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    This research reports on the colour evolution of six rosé wines during sixteen months of storage in the bottle.Colour changes were determined in terms of CIELAB colour parameters and in terms of the common colourcategories used in visual assessment. The colour measurement method reproduces the visual assessmentconditions during wine tasting with respect to wine sampler, illuminating source, observing background andsample-observer geometry. CIELAB L*, a*, b*, C* and hab colour coordinates were determined at seven differenttimes (t = 0, 20, 80, 153, 217, 300 and 473 days). The time evolution of colour coordinate values was studied usingmodels related to linear, quadratic and exponential rise to a maximum. Adjusted R2, average standard error andCIELAB ΔE* colour difference were used to compare models and evaluate their performance. For each colourcoordinate, the accuracy of model predictions was similar to the standard deviation associated with a singlemeasurement. An average ΔE* = 0.92 with a 90 percentile value ΔE*90% = 1.50 was obtained between measuredand predicted colour. These values are smaller than human colour discrimination thresholds. The classificationinto colour categories at different times depends on the wine sample. It was found that all wines take three tofour months to change from raspberry to strawberry colour and seven to eight months to reach the redcurrantcategory. Only two wines had developed salmon colour by the end of the experiment

    Diseño e implementación de un sistema de posicionamiento de un vehículo para la validación de sistemas ADAS

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    Este proyecto consiste en diseñar e implementar un sistema de posicionamiento de un vehículo para la validación de sistemas ADAS (Advanced Driver Assistance Systems). Se ha creado un escenario que simula una intersección en una vía urbana y en la que en un momento dado cruza un peatón a la vez que un vehículo se acerca a él. La infraestructura consiste en una pista de ensayos recta, al final de la cual hay un pórtico con raíles que arrastra a un conjunto formado por un soporte y un dummy. El sistema a diseñar es capaz de medir la posición y velocidad del vehículo test, de forma externa, a lo largo de toda la pista situada en un laboratorio de ensayos para poder verificar que éste se ha producido en las condiciones prefijadas. Se realizan los cálculos y selección del motor adecuado a utilizar para mover el dummy a lo largo del raíl del pórtico. Además se implementa un algoritmo que decide el momento adecuado en el que hay que activar el dummy a partir de los datos que se obtengan del vehículo test en tiempo real para que se encuentren en el cruce al mismo tiempo. Por último se ejecuta un testing para verificar que el algoritmo funciona el las condiciones establecidas

    La Cirugía Pediátrica en España: análisis del ejercicio de la profesión y proyección futura bajo criterios demográficos

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    Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Medicina, Departamento de Pediatría. Fecha de Lectura: 06-10-202

    Phenolic profiles, antioxidant activity and in vitro antiviral properties of apple pomace

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    Methanolic and acetonic extracts of apple pomace were evaluated for phenolic profiles, antioxidant properties and antiviral effect against herpes simplex virus type 1 (HSV-1) and 2 (HSV-2). Acetone extraction yielded the higher amounts of phenolic compounds. The extraction method influenced the phenolic composition although antioxidant activity correlated weakly with phenols concentration. Among the polyphenols analysed, quercetin glycosides were the most important family, followed by dihydrochalcones. Apple pomace extracts were able to inhibit both HSV-1 and HSV-2 replication in Vero cells by more than 50%, at non-cytotoxic concentrations. Selectivity indexes (SI) ranged from 9.5 to 12.2
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