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11.
Carlos Carleos María Concepción López-Díaz Miguel López-Díaz 《Journal of Mathematical Imaging and Vision》2014,48(1):1-12
The study of shapes is a difficult topic, but it is becoming more and more important as computer vision techniques are already crucial in many research fields. Concretely, the variability of shapes is the basis for many criteria of symptom definition in medical diagnosis. This article introduces a stochastic order to address the variability of star-shaped sets. The main properties of the order are analyzed. An example of an application to hypothesis testing in medical diagnosis is also provided. Namely, we study if there are significant differences between healthy and diseased corneal endothelia with respect to cell shapes by means of ocular images. 相似文献
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The Sterol and Erythrodiol + Uvaol Content of Virgin Olive Oils Produced in Five Olive-Growing Zones of Extremadura (Spain) 下载免费PDF全文
Manuel Martínez Cano Concepción de Miguel Gordillo Manuel Fuentes Mendoza Daniel Martín Vertedor Jacinto Sánchez Casas 《Journal of the American Oil Chemists' Society》2016,93(2):227-235
The content of sterols and erythrodiol + uvaol was studied in 273 virgin olive oil samples from 40 mills in five olive‐growing zones of Extremadura (Spain). An analysis of variance showed significant differences at a confidence level of 95 % between the different zones in each of the main sterols and in the sum of erythrodiol + uvaol. The results of a linear discriminant analysis, considering the different olive‐growing areas as categorical dependent variables and the different sterols as independent variables, explained 78.2 % of the variance with the first two discriminant functions. The resulting model correctly classified 86.9 % of the samples analysed. A validation study was conducted to verify the goodness of the discriminant analysis, resulting in 79.3 % of the new samples used for validation being correctly classified. In the graphical representation of the different groups studied considering the proposed model's first two discriminant functions, the centroids of the Sierra Norte de Cáceres, Vegas del Guadiana and Tierra de Barros olive‐growing zones were clearly separated, but this was not the case for the other two zones—La Serena and La Siberia. 相似文献
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Monica Cavia‐Saiz Maria D Busto Maria Concepción Pilar‐Izquierdo Natividad Ortega Manuel Perez‐Mateos Pilar Muñiz 《Journal of the science of food and agriculture》2010,90(7):1238-1244
BACKGROUND: This study was designed to evaluate and compare antioxidant capacity and radical scavenging activity of naringin and its aglycone by different in vitro assays. The effects of flavanones on lipid peroxidation, glutathione (GSH) oxidation and DNA cleavage were also assessed. RESULTS: The results showed that naringenin exhibited higher antioxidant capacity and hydroxyl and superoxide radical scavenger efficiency than naringin. Our results evidenced that glycosylation attenuated the efficiency in inhibiting the enzyme xanthine oxidase and the aglycone could act like a more active chelator of metallic ions than the glycoside. Additionally, naringenin showed a greater effectiveness in the protection against oxidative damage to lipids in a dose‐dependent manner. Both flavanones were equally effective in reducing DNA damage. However, they show no protective effect on oxidation of GSH. CONCLUSION: The data obtained support the importance of characterizing the ratio naringin/naringenin in foods when they are evaluated for their health benefits. Copyright © 2010 Society of Chemical Industry 相似文献
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This study reports the low‐temperature and clean fabrication of porous poly(lactic acid) (PLA) through solid‐state foaming using various mixtures of ethyl lactate (EL) and supercritical CO2 (scCO2) as the blowing agent. Results showed that adding a small amount of EL (up to 0.2% molar fraction) to scCO2 enhanced the plasticizing effect of the blowing agent mixture. As a direct consequence, at an operating temperature of 35 °C, PLA foams could be manufactured with homogeneous morphology, density as low as 0.09 ± 0.01 g cm?3, mean pore sizes up to 519.0 ± 205.0 µm and pore densities in the range 2.0 × 105 to 3.4 × 108 pores cm?3. Conversely, at a temperature of 40 °C, an increase of plasticizer concentration in the blowing agent mixture up to 0.2% promoted the crystallization of the polymer during sorption stage and, consequently, foaming was slightly reduced. © 2013 Society of Chemical Industry 相似文献
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Concepción?CollarEmail author Clara?Bollaín 《European Food Research and Technology》2004,218(2):139-146
The effects of microbial transglutaminase (TGM) on the viscoelastic profile of wheat flour doughs when added singly and in combination with hydrocolloids—hydroxypropylmethylcellulose (HPMC) and a high ester pectin (GENU pectin type BIG, or BIG)—, amylolytic (-amylase) and non amylolytic enzymes (xylanase) and an emulsifier [diacetyl tartaric acid ester of mono-diglycerides (DATEM)] have been investigated by applying response surface analysis to a Draper-Lin small composite design of formulated dough samples. In spite of the major effects on mixing, textural, extensional and viscometric parameters, which were provided by hydrocolloid/surfactant combinations, incorporation of TGM into dough formulas improved some viscoelastic properties. TGM, when added to DATEM and/or HPMC-containing doughs, induced synergistic effects on mixing parameters, resulting in increased water absorption, development time and stability. Highly cohesive doughs with improved water holding capacity and gluten strength during mixing and fermentation, and suitable pasting behaviour during cooking were achieved using TGM/BIG/DATEM mixtures, mainly associated with suitable interactions of the pairs TGM/DATEM and DATEM/BIG. 相似文献
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E. William Barrera M. Cinta Pujol Concepción Cascales Joan J. Carvajal X. Mateos R. Solé J. Massons Magdalena Aguiló Francesc Díaz 《Optical Materials》2011,34(2):355-359
We synthesized crystalline Erbium Er3+ and Ytterbium Yb3+ codoped -Lu2O3 nanolayers on SiO2 microspheres using the modified Pechini method. Two different kinds of precursors, nitrates and chlorides, have been used leading to a layer-to-layer morphology and necklaces structures, respectively. In both cases, the size of nanocrystallites constituting the optical active layer is around 5 nm. We performed X-ray powder diffraction to confirm the cubic crystalline structure of the sesquioxides layer. High resolution transmission electron microscopy analyses corroborate the crystalline nature of the layer. The optical emission of Er3+ in the visible range has been recorded. 相似文献
19.
Gloria Urbano María López‐Jurado Jesús M Porres Sławomir Frejnagel Elena Gómez‐Villalva Juana Frías Concepción Vidal‐Valverde Pilar Aranda 《Journal of the science of food and agriculture》2007,87(7):1356-1363
The effect of treatment with α‐galactosidase, tannase or a cell‐wall‐degrading enzyme complex under optimal conditions of pH, temperature and length of incubation time on the chemical composition and nutritive utilisation of protein and carbohydrates from pea (Pisum sativum L.) flour was studied. Soaking of pea flours in combination with enzyme treatment led to reductions of 77–90% in the levels of α‐galactosides, and of 60–80% in the levels of trypsin inhibitor activity, increasing the content of total available sugars, which was highest in the pea flour treated with the cell‐wall‐degrading enzyme complex. All the treatments assayed caused a significant improvement in daily food intake, whereas the nutritive utilisation of protein was not increased in any of the pea products tested when compared to the raw pea flour. However, all the soaking and enzymatic treatments led to a significant improvement in daily weight gain associated with a higher dietary intake of food and total available sugars. Copyright © 2007 Society of Chemical Industry 相似文献
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