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排序方式: 共有233条查询结果,搜索用时 31 毫秒
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M Luisa García Ester Cáceres M. Dolores Selgas 《Journal of the science of food and agriculture》2007,87(4):624-631
The effect of several fruit dietary fibres on the sensory properties of conventional and reduced‐fat cooked‐meat sausages is studied. Fruit fibres were assayed at 15 and 30 g kg?1 concentrations. The energy value reduction of the final products was close to 30%. Instrumental measurements of colour and texture were performed. Sensory properties were estimated by hedonic tests. A correlation principal component analysis was performed. The results of textural analysis showed that the differences between batches were mainly related to the fat content. However, sensory analysis indicated that the most appreciated batches were those manufactured with orange fibre, although their colour was more yellow than the remainder. As a consequence, it is possible to manufacture conventional and hypocaloric cooked sausages containing fruit fibres mainly at a concentration of 15 g kg?1 of fibre and obtain a sensorial acceptable product. Copyright © 2006 Society of Chemical Industry 相似文献
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Ester Samuel-Cahn 《Sequential Analysis》2013,32(4):395-401
Abstract Let X j , j = 1,…, n be independent and identically distributed random variables. Like in the classical secretary problem, the optimal stopper only observes Y j = 1, if X j is a (relative) record, and Y j = 0, otherwise. The actual X j values are not revealed. The goal is to maximize the expected X value at which one stops. We show that the optimal number of observations one should skip before considering stopping depends heavily on the underlying distribution. 相似文献
36.
Judith Martín‐de Len Victoria Bernardo Ester Laguna‐Gutirrez Miguel ngel Rodríguez‐Prez 《Polymer International》2020,69(1):72-83
Three different grades of poly(methyl methacrylate) (PMMA) with different rheological properties are used for the production of nanocellular materials using gas dissolution foaming. The influences of both the viscosity of the different polymers and the processing parameters on the final cellular structure are studied using a wide range of saturation and foaming conditions. Foaming conditions affect similarly all cellular materials. It is found that an increase of the foaming temperature results in less dense nanocellular materials, with higher cell nucleation densities. In addition, it is demonstrated that a lower viscosity leads to cellular polymers with a lower relative density but larger cell sizes and smaller cell nucleation densities, these differences being more noticeable for the conditions in which low solubilities are reached. It is possible to produce nanocellular materials with relative densities of 0.24 combined with cell sizes of 75 nm and cell nucleation densities of 1015 nuclei cm?3 using the PMMA with the lowest viscosity. In contrast, minimum cell sizes of around 14 nm and maximum cell nucleation densities of 3.5 × 1016 nuclei cm?3 with relative densities of 0.4 are obtained with the most viscous one. © 2019 Society of Chemical Industry 相似文献
37.
A generalized finite‐strain damage model for quasi‐incompressible hyperelasticity using hybrid formulation
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Ester Comellas Facundo J. Bellomo Sergio Oller 《International journal for numerical methods in engineering》2016,105(10):781-800
A new generalized damage model for quasi‐incompressible hyperelasticity in a total Lagrangian finite‐strain framework is presented. A Kachanov‐like reduction factor (1 ? D) is applied on the deviatoric part of the hyperelastic constitutive model. Linear and exponential softening are defined as damage evolution laws, both describable in terms of only two material parameters. The model is formulated following continuum damage mechanics theory such that it can be particularized for any hyperelastic model based on the volumetric–isochoric split of the Helmholtz free energy. However, in the present work, it has been implemented in an in‐house finite element code for neo‐Hooke and Ogden hyperelasticity. The details of the hybrid formulation used are also described. A couple of three‐dimensional examples are presented to illustrate the main characteristics of the damage model. The results obtained reproduce a wide range of softening behaviors, highlighting the versatility of the formulation proposed. The damage formulation has been developed to be used in conjunction with mixing theory in order to model the behavior of fibered biological tissues. As an example, the markedly different behaviors of the fundamental components of the rectus sheath were reproduced using the damage model, obtaining excellent correlation with the experimental results from literature. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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Laura Delgado-Abellán Xavier Aguado Ester Jiménez-Ormeño Laura Mecerreyes 《Ergonomics》2014,57(5):787-797
The aim of this study was to analyse the differences in foot dimensions in a sample of Spanish school-aged children. A total of 497 boys and 534 girls from Spain participated in the study. Measurements of both feet were obtained using a 3D foot digitiser, and shoe sizes were recorded and then estimated based on foot length measurements. The variations in foot measurements underwent a gradual increase with age in both boys and girls. Gender differences appeared at the age of 8–9 years, when the girls in the sample were found to wear smaller shoes than those they should have worn. Most foot dimensions begin to differ between boys and girls at the age of 8 years. The girls in the sample studied used footwear that was too small for their foot length, probably because they looked for a better width fit. 相似文献
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Daniel A. Dalla Corte Camila TorresPatricia dos Santos Correa Ester Schmidt RiederCélia de Fraga Malfatti 《International Journal of Hydrogen Energy》2012
The electrolytic codeposition of nickel composite coatings with different amounts of polyaniline particles (PAni) was used to produce electrodes for the catalytic hydrogen evolution reaction (HER). The electrodes produced were imaged by scanning electron microscopy, and their catalytic activities for HER were determined by linear Tafel polarization and electrochemical impedance spectroscopy (EIS) in a 0.5 M H2SO4 solution. The electron micrographs showed that the amount of exposed polyaniline surface was directly related to the polyaniline concentration in the solution used for the electrolytic codeposition. The linear Tafel polarizations indicated that the HER was limited by the Volmer step, and the EIS measurements showed that the presence of PAni on the electrode surface affected the HER. Electrodes with higher composite contents exhibited enhanced catalytic activity. 相似文献
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Giovanni Ambrosi Simona Bartocci Laurent Basara Roberto Battiston William J. Burger Luca Carfora Guido Castellini Piero Cipollone Livio Conti Andrea Contin Cinzia De Donato Cristian De Santis Francesco M. Follega Cristina Guandalini Maria Ionica Roberto Iuppa Giuliano Laurenti Ignazio Lazzizzera Mauro Lolli Christian Manea Laura Marcelli Giuseppe Masciantonio Matteo Mergé Giuseppe Osteria Lorenzo Pacini Francesco Palma Federico Palmonari Beatrice Panico Laura Patrizii Francesco Perfetto Piergiorgio Picozza Michele Pozzato Matteo Puel Irina Rashevskaya Ester Ricci Marco Ricci Sergio Bruno Ricciarini Valentina Scotti Alessando Sotgiu Roberta Sparvoli Bruno Spataro Vincenzo Vitale 《中国科学:技术科学(英文版)》2018,61(5):643-652
CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CNSA(Chinese National Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle environment, for studying the seismo-associated disturbances in the ionosphere-magnetosphere transition zone. The anthropogenic and electromagnetic noise,as well as the natural non-seismic electromagnetic emissions is mainly due to tropospheric activity. In particular, the mission aims to confirming the existence of possible temporal correlations between the occurrence of earthquakes for medium and strong magnitude and the observation in space of electromagnetic perturbations, plasma variations and precipitation of bursts with highenergy charged particles from the inner Van Allen belt. In this framework, the high energy particle detector(HEPD) of the CSES mission has been developed by the Italian LIMADOU Collaboration. HEPD is an advanced detector based on a tower of scintillators and a silicon tracker that provides good energy and angular resolution and a wide angular acceptance, for electrons of 3–100 Me V, protons of 30–200 Me V and light nuclei up to the oxygen. CSES satellite has been launched on February 2~(nd), 2018 from the Jiuquan Satellite Launch Center(China). 相似文献