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Browsing by Subject "Dielectric properties"

Now showing items 1-20 of 25

Application of microwaves dielectric spectroscopy for controlling long time osmotic dehydration of parenchymatic apple tissue

Castro Giráldez, Marta; Fito Suñer, Pedro José; Fito Maupoey, Pedro (Elsevier, 2011-05)

[EN] Dielectric spectroscopy studies have been performed on fresh and osmotically dehydrated Granny Smith apples. The osmotic treatment consisted on immerse the samples into 65% (w/w) sucrose aqueous solution at 30 degrees ...
Application of microwaves dielectric spectroscopy for controlling osmotic dehydration of kiwifruit (Actinidia deliciosa cv Hayward)

Castro Giráldez, Marta; Fito Suñer, Pedro José; Dalla Rosa, Marco; Fito Maupoey, Pedro (Elsevier, 2011-10)

[EN] Dielectric spectroscopy studies have been performed on fresh and osmotically dehydrated kiwifruits (Actinidia deliciosa cv Hayward). The osmotic treatment consisted on the immersion the samples into 65% (w/w) sucrose ...
Assessment of the dielectric anisotropy in timber using the nondestructive GPR technique

Martínez Sala, Rosa María; Rodríguez Abad, Isabel; Díez Barra, Rafael; Capuz Lladró, Rafael (Elsevier, 2013-01-01)

In the realm of architecture ground-penetrating radar has been used as nondestructive technique to assess physical properties of wood structures in situ. However, a better understanding of the dielectric anisotropy of ...
DESARROLLO DE TÉCNICAS COMBINADAS DE SECADO CON AIRE CALIENTE Y MICROONDAS EN LA PRODUCCIÓN DE FIBRA ALIMENTARIA A PARTIR DE SUBPRODUCTOS CÍTRICOS

Talens Vila, Clara (2016-01-21)

[EN] Sustainability is nowadays an investment for the future of any economic activity. The current situation of crisis has had an adverse impact in most industries, including the agri-food sector. However, this industry ...
Development of a dielectric spectroscopy technique for the determination of key bichemical markers of meat quality

Castro Giráldez, Marta; Dols, Laura; Toldrá Vilardell, Fidel; Fito Maupoey, Pedro (Elsevier, 2011-07-01)

[EN] Dielectric measurements of different standard solutions (nucleotides, nucleosides, lactic acid and myoglobin) were assayed simulating the concentrations of these substances in early postmortem meat. These assays were ...
Dielectric Behavior Induced by Vitamin E and Electron Beam Irradiation in Ultra High Molecular Weight Polyethylene

Puertolas, Jose Antoio; Martínez-Morlanez, María José; Teruel Juanes, Roberto; Martinez-Felipe, Alfonso; Oral, Ebru; Pascual, Francisco Javier; Ribes Greus, María Desamparados (Wiley, 2014-09-05)

[EN] Radiation cross-linked ultra high molecular weight polyethylenes (UHMWPEs) have been successfully used as wear resistant bearing surfaces in total joint arthroplasty. A recent development in this field is the ...
Dielectric spectroscopy of natural rubber-cellulose II nanocomposites

Ortiz Serna, Mª Pilar; Díaz Calleja, Ricardo; Sanchis Sánchez, María Jesús; Riande, Evaristo; Numes, R.; Martins, A.; Visconte, L. (Elsevier, 2011)

[EN] Nanocomposite materials obtained from natural rubber (NR) reinforced with different amounts of cellulose II nanoparticles (in the range of 0 to 30 phr) are studied by dielectric spectroscopy (DS). For comparative ...
Dielectrical, microstructural and flow properties of sauce model systems based on starch, gums and salt

Guardeño Expósito, Luis Miguel; Catalá Civera, José Manuel; Plaza González, Pedro José; Sanz, T.; Salvador, A.; Fiszman, S.; Hernando Hernando, Mª Isabel (Elsevier, 2010-05)

The dielectric properties of salted systems based on different hydrocolloids (native or modified starches, or on iota, lambda, or kappa carrageenan) as models for microwaveable white sauces were studied. Microstructural ...
Diseño y optimización de componentes de pilas de combustible en aplicaciones para automoción

González Guisasola, Carlos Francisco (2015-05-18)

[EN] A characterization metodology for Direct Alcohol Polymeric Fuel Cell membranes is proposed based on dielectric properties. Nafion 117 is tested as reference and in-lab crosslinked PVA membranes with SSA and SSA-PAA ...
Dynamic Measurement of Dielectric Properties of Materials at High Temperature During Microwave Heating in a Dual Mode Cylindrical Cavity

Catalá Civera, José Manuel; Canós Marín, Antoni Josep; Plaza González, Pedro José; Gutiérrez Cano, José Daniel; García Baños, Beatriz; Penaranda-Foix, Felipe L. (Institute of Electrical and Electronics Engineers (IEEE), 2015-09)

A microwave cavity and heating system for microwave processing and in situ dynamic measurements of the complex permittivity of dielectric materials at high temperatures (~1000ºC) has been developed. The method is based on ...
Effect of water content on the dynamic measurement of dielectric properties of food snack pellets during microwave

Gutiérrez Cano, José Daniel; Hamilton, Ian E.; Catalá Civera, José Manuel; Bows, John; Penaranda-Foix, Felipe L. (Elsevier, 2018)

[EN] The evolution of dielectric properties of starch-based food pellets with different moisture contents was measured during microwave expansion to determine the effect of water content on the expansion dynamics. Dynamic ...
Energy Diagrams and Stability Restrictions for Electroelastic Generators

Diaz-Calleja, R.; Llovera Segovia, Pedro (John Wiley & Sons, 2010)

[EN] The relation between electric and mechanical properties of dielectric elastomers allows using them as energy convertors under some conditions. The process is based on the relations between mechanical and electrical ...
Estudio del efecto de las propiedades dieléctricas del hormigón en los parámetros de las ondas electromagnéticas del georradar. Modelización numérica del comportamiento del hormigón con gprMax

Botella Campello, Youmana Fina (2018-09-18)

[es] El georradar es una técnica de ensayo de materiales que cada vez está más presente en diferentes campos de estudio debido a su carácter no destructivo. De hecho, es una técnica que en edificación se emplea cada vez ...
Full-wave analysis of dielectric-loaded cylindrical waveguides and cavities using a new four-port ring network

Penaranda-Foix, Felipe L.; Janezic, Michael D.; Catalá Civera, José Manuel; Canós Marín, Antoni Josep (Institute of Electrical and Electronics Engineers (IEEE), 2012-09)

In this paper, a full-wave method for the electromagnetic analysis of dielectric-loaded cylindrical and coaxial waveguides and cavities is developed. For this purpose, a new four-port ring network is proposed, and the ...
High thermal stability of microwave sintered low-er beta-eucryptite materials

Benavente Martínez, Rut; Salvador Moya, Mª Dolores; Penaranda-Foix, Felipe L.; García-Moreno, Olga; Borrell Tomás, María Amparo (Elsevier, 2015-12)

Low-temperature sinterable microwave LiAlSiO4-based solid-state material was investigated with regard to microwave dielectric properties as functions of the sintering temperature. beta-eucryptite materials and alumina-reinforced ...
In Situ Monitoring of Microwave Processing of Materials at High Temperatures through Dielectric Properties Measurement

García Baños, Beatriz; Catalá Civera, José Manuel; Peñaranda Foix, Felipe Laureano; Plaza González, Pedro José; Llorens Vallés, Gabriel (MDPI AG, 2016)

[EN] Microwave-assisted processes have recognized advantages over more conventional heating techniques. However, the effects on the materials¿ microstructure are still a matter of study, due to the complexity of the ...
Low frequency dielectric measurements to assess post-mortem ageing of pork meat

Castro Giráldez, Marta; Toldrá Vilardell, Fidel; Fito Maupoey, Pedro (Elsevier, 2011-07)

[EN] The use of dielectric properties at low frequencies to estimate the progress of pork meat (Longissimus dorsi) ageing was evaluated. Dielectric measurements were perfomed at 140 Hz, 1 kHz and 300 kHz in perpendicular ...
Measurement of dielectric constant for a liquid and its temperature dependence

APICELLA FERNANDEZ, SERGIO (2014-06-24)

The dielectric properties determine the electrical characteristics of materials. These properties are important for understanding the behavior of materials and how they can interact with each other. Engineers and scientists ...
Microwave sensor system for continuous monitoring of adhesive curing processes

García Baños, Beatriz; Catalá Civera, José Manuel; Penaranda-Foix, Felipe L.; Canós Marín, Antoni Josep; Sahuquillo Navarro, Oscar (IOP Publishing: Hybrid Open Access, 2012-03)

A microwave sensor system has been developed for monitoring adhesive curing processes. The system provides continuous, real-time information about the curing progress without interfering with the reaction. An open-coaxial ...
Poly(ethyl methacrylate-co-hydroxyethyl acrylate) random co-polymers: Dielectric and dynamic-mechanical characterization

Gómez-Tejedor, José Antonio; Rodríguez Acosta, T.; Gómez Ribelles, José Luís; Polizos, G.; Pissis, P. (Elsevier, 2007)

[EN] The conformational mobility in poly(ethyl methacrylate-co-hydrxyethyl acrylate) co-polymers was studied by dielectric relaxation spectroscopy, thermally stimulated depolarization currents and dynamic-mechanical ...