<?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>S0035-001X2008000700003</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Gradient of heavy elements in the ocean sediments from the Gulf of Tehuantepec]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aspiazu F]]></surname>
<given-names><![CDATA[J.A]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz Fernández]]></surname>
<given-names><![CDATA[A.C]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Monroy]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Torres]]></surname>
<given-names><![CDATA[J.J]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villaseñor S]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ordoñez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Acelerador Tandem  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional Autónoma de México Inst. de Ciencias del Mar y Limnología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Química Nuclear  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A04">
<institution><![CDATA[,Instituto Nacional de Investigaciones Nucleares Sínt. y Carac. de Materiales ]]></institution>
<addr-line><![CDATA[Méx ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2008</year>
</pub-date>
<volume>54</volume>
<fpage>5</fpage>
<lpage>8</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2008000700003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2008000700003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2008000700003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[With the scope of determining the concentrations of heavy elements in regard to the ocean's depth in the Gulf of Tehuantepec, several samples were analyzed by using PIXE. The gradients of the concentrations of the elements found, are presented.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Usando la tecnica PIXE se analizaron muestras de sedimento marino del Golfo de Tehuantepec para determinar las concentraciones de elementos pesados respecto a la profundidad. Se presentan los gradientes de las concentraciones medidas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[PIXE analysis]]></kwd>
<kwd lng="en"><![CDATA[ocean sediments]]></kwd>
<kwd lng="en"><![CDATA[heavy elements]]></kwd>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="es"><![CDATA[Análisis PIXE]]></kwd>
<kwd lng="es"><![CDATA[sedimentos marinos]]></kwd>
<kwd lng="es"><![CDATA[medio ambiente]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[elementos pesados]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>Gradient of heavy elements in the ocean sediments from the Gulf of Tehuantepec</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>J.A. Aspiazu F.&ordf;, A.C. Ruiz Fern&aacute;ndez<sup>b</sup>, J. L&oacute;pez Monroy&ordf;, J.J. Ram&iacute;rez Torres&ordf;, P. Villase&ntilde;or S.&ordf;, E. Ordo&ntilde;ez<sup>c</sup>, A. Guti&eacute;rrez<sup>d</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; Acelerador Tandem. </i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> U. Academica Mazatl&aacute;n Universidad Nacional Aut&oacute;noma de M&eacute;xico, Inst. de Ciencias del Mar y Limnolog&iacute;a. </i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>c</sup> Qu&iacute;mica Nuclear.</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>d</sup> S&iacute;nt. y Carac. de Materiales. Instituto Nacional de Investigaciones Nucleares. Carretera M&eacute;xico&#150;Toluca S/N, La Marquesa, Ocoyoacac, M&eacute;x. C.P. 52750.</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 14 de mayo de 2007    ]]></body>
<body><![CDATA[<br> Aceptado el 26 de octubre de 2007</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">With the scope of determining the concentrations of heavy elements in regard to the ocean's depth in the Gulf of Tehuantepec, several samples were analyzed by using PIXE. The gradients of the concentrations of the elements found, are presented.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>PIXE analysis; ocean sediments; heavy elements; contamination.</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">Usando la tecnica PIXE se analizaron muestras de sedimento marino del Golfo de Tehuantepec para determinar las concentraciones de elementos pesados respecto a la profundidad. Se presentan los gradientes de las concentraciones medidas.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>An&aacute;lisis PIXE; sedimentos marinos; medio ambiente; contaminaci&oacute;n; elementos pesados. </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: 92.20.Vu; 92.20.Wx; 32.30.Rj; 78.70.En</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/v54s1/v54s1a3.pdf">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>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. J.A. Aspiazu F. <i>et al., International Journal of PIXE </i><b>12</b> (2002) 225.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8348536&pid=S0035-001X200800070000300001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">2. J. L&oacute;pez M., J.J. Ram&iacute;rez Torres, J.A. Aspiazu F., P. Villase&ntilde;or S., L. Cervantes N., <i>V Simposio de Contaminacion Atmosf&eacute;rica , </i>El Colegio Nacional, M&eacute;xico, D. F. (2005) 233.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8348537&pid=S0035-001X200800070000300002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> ]]></body><back>
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<source><![CDATA[International Journal of PIXE]]></source>
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</article>
