Tintado de superficies y efectos visuales mediante el uso de micro y nanopartículas metálicas

Número de publicación: ES2285932 A1 (16.11.2007) También publicado como: ES2285932 B1 (01.11.2008) Número de Solicitud: Consulta de Expedientes OEPM (C.E.O.)P200600774 (06.03.2006)Sistema de coloración de superficies mediante el empleo de soluciones de partículas nanoscópicas metálicas depositadas sobre la superficie del objeto a tintar. Al no suponer un recubrimiento completo de la superficie, como el que se da en depósitos moleculares, sino un depósito discreto de partículas, dejará pasar los detalles originales de la superficie. Este método presenta la ventaja de que el color se controla mediante la elección del tipo de partícula o mezcla de ellas y no únicamente mediante el control del espesor de la lámina depositada, en el caso de deposiciones moleculares. Lo parámetros de control y diseño son: forma de las partículas, tamaño de las partículas, relación de aspecto de las mismas, naturaleza material de las partículas, concentración de partículas, relación de mezcla de las partículas.Universidad de Almerí

Pressurised Liquid Extraction of Capsaicinoids from Peppers

Se presenta el desarrollo de un método de extracción de capsaicinoides en pimientos mediante la técnica de extracción mediante fluidos presurizados

Ultrasound Assisted Extraction of capsaicinoids from peppers

The development of a rapid, reproducible and simple method of extraction of the majority capsaicinoids (nordihydrocapsaicin, capsaicin, dihydrocapsaicin, homocapsaicin and homodihydrocapsaicin) present in hot peppers by the employment of ultrasound-assisted extraction is reported

Fast determination of capsaicinoids from peppers by High-Performance Liquid Chromatography using a reversed phase Monolithic Column

This article reports the development of a rapid and reproducible method of HPLC with fluorescence detection for the determination and quantification of the main capsaicinoids (nordihydrocapsaicin, capsaicin, dihydrocapsaicin, homocapsaicin and homodihydro-capsaicin) present in hot peppers by employing a monolithic column

Optimization of a new extraction technique for analysis of verbenone and cis-verbenol in pine seeds

Results from a systematic study of the factors affecting extraction of cis-verbenol and verbenone from pine seeds are presented. Five extraction conditions were investigated: extraction solvent, method of extraction, extraction temperature, volume of solvent, and the ratio of the mass of sample to the amount of extraction solvent

Rapid determination of simple polyphenols in grapes by HPLC using a monolithic column

The development of a rapid, reliable and reproducible LC method for the determination and quantification of 13 polyphenols (gallic acid, protocatechuic aldehyde, gentisic acid, catechin, vanillinic acid, caffeic acid, vanillin, epicatechin, syringaldehyde, p-coumaric acid, ferulic acid, sinapic acid and resveratrol) in grapes and derived products is reported

On the estimation of percentiles of the Weibull distribution

3 pages, no figures.Advanced ceramics exhibit brittle behavior. The lack of ductility and the presence of flaws and defects of different sizes and orientations lead to scatter in failure strength. This variability depends also on the specimen size, stress distribution and stress state. The Weibull theory explains correctly this dependence, so the fracture strength of ceramic materials has been studied using the Weibull statistic as recommended by ASTM Standards for reporting uniaxial strength data of these materials.The authors are indebted to the Fundación Ramón Areces (Área de Materiales, IX Concurso Nacional) for its financial support of this research.Publicad

Lente intraocular multifocal refractiva con calidad óptica optimizada en un rango de foco y procedimiento para obtenerla

La presente invención describe una lente intraocular multifocal refractiva con geometría asférica en ambas superficies de tal forma que el mapa de potencia óptica local de la lente, en combinación con la cornea, tiene una zona central de potencia óptica intermedia rodeada en transición suave por un anillo de potencia óptica máxima, tras el cual se alternan de forma suave anillos de potencia oscilante. La lente proporciona un comportamiento estable en términos de calidad de imagen, tanto a través de foco como frente a cambios de pupila. El procedimiento para obtenerla se basa en la optimización de una función de mérito multiconfiguración que integra de manera simultánea el comportamiento óptico de un ojo modelo que incorpora la lente, frente a diferentes distancias al plano objeto.Peer reviewedConsejo Superior de Investigaciones CientíficasB1 Patente sin examen previ

Statistical distribution of the estimator of Weibull modulus

3 pages, 3 figures.The Weibull statistic has been widely used to study the inherent scatter existing in the strength properties of many advanced materials, as well as in the fracture toughness of steels in the ductile-brittle transition region.The authors are indebted to the Fundación Ramón Areces (Área de Materiales, IX Concurso Nacional) for its financial support of this research.Publicad

Statistical analysis of the mechanical properties of composite materials

7 pages, 6 figures.The Weibull statistic is currently used in designing mechanical components made of composite materials. This work presents useful formulae to describe the behaviour of the Weibull modulus estimator, which in turn may be described by means of a three-parameter Weibull distribution. Expressions for the parameters of this latter distribution, dependent on the sample size, are also given in the paper, so, the percentage points, published until now in tabular form, may be directly calculated. Empirical expressions are derived for determining the A-basis and the B-basis material properties as a function of the sample size.The authors are indebted to the Fundación Ramón Areces (Área de Materiales, IX Concurso Nacional) for the financial support of this research.Publicad