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Browsing by Subject "Dielectric properties"

Now showing items 1-20 of 41

A New Stand-Alone Microwave Instrument for Measuring the Complex Permittivity of Materials at Microwave Frequencies

Gutiérrez Cano, José Daniel; Plaza González, Pedro José; Canós Marín, Antoni Josep; García-Baños, Beatriz; Catalá Civera, José Manuel; Penaranda-Foix, Felipe L. (Institute of Electrical and Electronics Engineers, 2020-06)

[EN] This paper reports the development of a stand-alone and portable instrument designed to measure the complex permittivity of dielectric materials at microwave frequencies. The equipment consists of an in-house single-port ...
A step ahead on efficient microwave heating for kaolinite

Reinosa, J. J.; García-Baños, Beatriz; Catalá Civera, José Manuel; Fernández Lozano, J. F. (Elsevier, 2019-02)

[EN] The thermal evolution of kaolin clay under microwave radiation shows an unexpected large heating rate up to 500 degrees C/min for temperatures > 650 degrees C. Such heating rate is associated with a resistivity drop ...
Análisis de la influencia de las corrientes de macrocelda en la corrosión de losas de hormigón armado

Pacheco Garcia, Erika Juliana (Universitat Politècnica de València, 2021-09-10)

[ES] En la actualidad, el deterioro de las estructuras de hormigón armado debido a la corrosión es un problema de gran importancia en todo el mundo. Las consecuencias del desarrollo de este fenómeno llevan asociados ...
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 ...
Caracterización térmica de mezclas compatibles estructuralmente basadas en biomateriales de lignina y poliuretano termoplástico como precursores de fibras de carbono

Muñoz Biendicho, Mario (Universitat Politècnica de València, 2019-09-02)

[ES] La producción de fibras de carbono basadas en lignina reduce el costo y el impacto ambiental asociado a la tradicional fabricación de estas por vía petroquímica. Sin embargo, el procesado de la lignina pura como ...
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 (Universitat Politècnica de València, 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 ...
Desarrollo de un sistema de monitorización de liofilización de pollo mediante espectroscopía dieléctrica

Algarra Alexandre, Enrique (Universitat Politècnica de València, 2020-03-11)

[ES] La congelación es un método de conservación muy extendido en la industria cárnica. Además, es una parte importante de otros procesos complejos como la liofilización, que consiste en una deshidratación para reducir la ...
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 (Universitat Politècnica de València, 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 food snack pellets during microwave expansion

Gutiérrez Cano, José Daniel; Catalá Civera, José Manuel; Bows, John; Penaranda-Foix, Felipe L. (Elsevier, 2017-06)

[EN] The in situ dielectric properties of a starch-based food pellet have been measured during microwave expansion. A dual-mode cylindrical cavity allowed simultaneous microwave heating and dielectric measurements of a ...
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 de las propiedades térmicas y dieléctricas de nanocomposites membranas de quitosano con lignina Organosolv o Kraft al 1%

Beirnaert, Karel (Universitat Politècnica de València, 2021-09-06)

[ES] El quitosano es uno de los biopolímeros biodegradables renovables más abundantes con buenas propiedades antimicrobianas, antioxidantes y absorbentes de disolventes, que se puede utilizar en aplicaciones tales como ...
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 (Universitat Politècnica de València, 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 ...