<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2009000100001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Transferencia energética en un modelo multicapa de tejido humano sometido a irradiación electromagnética de alta frecuencia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Collado]]></surname>
<given-names><![CDATA[Á.J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molina-Cuberos]]></surname>
<given-names><![CDATA[G. J.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Católica San Antonio Dpto. de C. Politecnicas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>España</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Murcia Facultad de Químicas Dpto. de Física]]></institution>
<addr-line><![CDATA[Murcia ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2009</year>
</pub-date>
<volume>55</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>7</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2009000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2009000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2009000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La forma en la que la energía es absorbida cuando la superficie de la piel es expuesta a una radiación electromagnética, y las consecuencias físicas implicadas, son esencialmente los propósitos de este trabajo. En particular, se estudia la radiación electromagnética de alta frecuencia. Cuando esta radiación incide directamente sobre la superficie de la piel, la energía es transmitida hacia el interior de los tejidos, incrementando su temperatura. Este proceso ha sido empleado de forma beneficiosa en muchos casos. Aún hoy día, existe un desconocimiento teórico sobre estos efectos. Este estudio pretende tratar el tema desde su origen, y deja vías de trabajo futuras para abordar a fondo el mismo. La piel es considerada como un sistema de múltiples capas con distintas características cada una de ellas, cada capa es caracterizada por parámetros de permitividad, conductividad, densidad y calor específico. Dos tipos de piel son analizados: un tipo fibroso y un tipo adiposo, cada uno de ellos con diferentes grados de hidratación. En este estudio se muestra la evolución temporal no lineal de la temperatura de los tejidos y es tenida en cuenta la redistribución del calor ejercida por el propio cuerpo humano.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The way the energy is absorbed when skin surface is being exposed to an electromagnetic radiation, and the physical consequences involved, are essentially the purposes of this study. In particular, we are dealing with High Frequency radiation. When it is directed toward the surface of the skin, energy is transmitted to its inner layers causing an increase of the temperature. This process has experimentally been proved to be beneficial in many cases. Yet theoretically there is still a slightly hollow basis about it. This study pretends to deal with that subject from its origin, and allows future study doors to tap in depth this theme. Skin tissue is actually a multilayer tissue with a different tissue in each layer. Each one of them is characterized by some parameters, such as permittivity, conductivity, density and specific heat. Two kinds of skin tissues will be analysed: a fibrous and a fatty one, each of both with a different skin humidity. In this study some parameters such as the non-linear temporal evolution of tissue temperature and the redistribution of heat them will be take into account.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Radiofrecuencia]]></kwd>
<kwd lng="es"><![CDATA[absorción]]></kwd>
<kwd lng="es"><![CDATA[diatermia]]></kwd>
<kwd lng="es"><![CDATA[tejidos]]></kwd>
<kwd lng="es"><![CDATA[modelo de transferencia de calor]]></kwd>
<kwd lng="en"><![CDATA[Radio frequency]]></kwd>
<kwd lng="en"><![CDATA[absorption]]></kwd>
<kwd lng="en"><![CDATA[diathermy]]></kwd>
<kwd lng="en"><![CDATA[tissues]]></kwd>
<kwd lng="en"><![CDATA[bio-heat equation]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Transferencia energ&eacute;tica en un modelo multicapa de tejido humano sometido a irradiaci&oacute;n electromagn&eacute;tica de alta frecuencia</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"> <b>&Aacute;.J. Garc&iacute;a&#150;Collado&ordf;, G. J. Molina&#150;Cuberos<sup>b</sup> y M. J. N&uacute;&ntilde;ez<sup>b</sup></b></font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <i>&ordf; Dpto. de C. Politecnicas, Universidad Cat&oacute;lica San Antonio, Guadalupe&#150;Murcia, Espa&ntilde;a, </i>e&#150;mail: <a href="mailto:ajgarcia@pdi.ucam.edu">ajgarcia@pdi.ucam.edu</a></font></p>     <p align="justify"><font face="verdana" size="2"> <i><sup>b</sup> Dpto. de F&iacute;sica, Facultad de Qu&iacute;micas, Universidad de Murcia, Murcia, Espa&ntilde;a, </i>e&#150;mail: <a href="mailto:gregomc@um.es">gregomc@um.es</a>, <a href="mailto:maripepa@um.es">maripepa@um.es</a></font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> Recibido el 31 de enero de 2008    ]]></body>
<body><![CDATA[<br> Aceptado el 6 de febrero de 2009</font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2"> La forma en la que la energ&iacute;a es absorbida cuando la superficie de la piel es expuesta a una radiaci&oacute;n electromagn&eacute;tica, y las consecuencias f&iacute;sicas implicadas, son esencialmente los prop&oacute;sitos de este trabajo. En particular, se estudia la radiaci&oacute;n electromagn&eacute;tica de alta frecuencia. Cuando esta radiaci&oacute;n incide directamente sobre la superficie de la piel, la energ&iacute;a es transmitida hacia el interior de los tejidos, incrementando su temperatura. Este proceso ha sido empleado de forma beneficiosa en muchos casos. A&uacute;n hoy d&iacute;a, existe un desconocimiento te&oacute;rico sobre estos efectos. Este estudio pretende tratar el tema desde su origen, y deja v&iacute;as de trabajo futuras para abordar a fondo el mismo. La piel es considerada como un sistema de m&uacute;ltiples capas con distintas caracter&iacute;sticas cada una de ellas, cada capa es caracterizada por par&aacute;metros de permitividad, conductividad, densidad y calor espec&iacute;fico. Dos tipos de piel son analizados: un tipo fibroso y un tipo adiposo, cada uno de ellos con diferentes grados de hidrataci&oacute;n. En este estudio se muestra la evoluci&oacute;n temporal no lineal de la temperatura de los tejidos y es tenida en cuenta la redistribuci&oacute;n del calor ejercida por el propio cuerpo humano.</font></p>     <p align="justify"><font face="verdana" size="2"> <b>Descriptores: </b>Radiofrecuencia; absorci&oacute;n; diatermia; tejidos; modelo de transferencia de calor.</font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2"> The way the energy is absorbed when skin surface is being exposed to an electromagnetic radiation, and the physical consequences involved, are essentially the purposes of this study. In particular, we are dealing with High Frequency radiation. When it is directed toward the surface of the skin, energy is transmitted to its inner layers causing an increase of the temperature. This process has experimentally been proved to be beneficial in many cases. Yet theoretically there is still a slightly hollow basis about it. This study pretends to deal with that subject from its origin, and allows future study doors to tap in depth this theme. Skin tissue is actually a multilayer tissue with a different tissue in each layer. Each one of them is characterized by some parameters, such as permittivity, conductivity, density and specific heat. Two kinds of skin tissues will be analysed: a fibrous and a fatty one, each of both with a different skin humidity. In this study some parameters such as the non&#150;linear temporal evolution of tissue temperature and the redistribution of heat them will be take into account.</font></p>     <p align="justify"><font face="verdana" size="2"> <b>Keywords: </b>Radio frequency; absorption; diathermy; tissues; bio&#150;heat equation.</font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"> PACS: 44.05.+e; 44.35.+c; 44.40.+a</font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <a href="/pdf/rmf/v55n1/v55n1a1.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <b>Agradecimientos</b></font></p>     <p align="justify"><font face="verdana" size="2"> Los autores de este trabajo quieren mostrar su agradecimiento al Programa Ramon y Cajal del MEC y a la empresa Tahe por su apoyo en la realizacion del mismo.</font></p>     <p align="justify"><font face="verdana" size="2"> &nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <b>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2"> 1. P. 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