<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242018000300466</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v9i3.4358</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Metales pesados en leche de vacas alimentadas con alfalfa producida en suelos irrigados con aguas residuales en Puebla y Tlaxcala, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Heavy metals in milk from cows fed alfalfa produced in soils irrigated with wastewater in Puebla and Tlaxcala, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-González]]></surname>
<given-names><![CDATA[Numa Pompilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Rojas]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calderón-Sánchez]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Ortega]]></surname>
<given-names><![CDATA[Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tamariz-Flores]]></surname>
<given-names><![CDATA[José Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Facultad de Ingeniería Agrohidráulica ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Córdoba Departamento de Bromatología y Biotecnología de alimentos ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus-Puebla ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Departamento de Investigación en Ciencias Agrícolas ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>3</numero>
<fpage>466</fpage>
<lpage>485</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242018000300466&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242018000300466&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242018000300466&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El objetivo fue determinar la presencia de Cd, Pb, Ni, Cu, Cr, Zn y As en la cadena alimentaria de la leche de vaca, producida en zonas donde la alfalfa es cultivada en suelos irrigados con aguas residuales de procedencia industrial, doméstica y agrícola. Se muestrearon suelo y alfalfa de 16 sitios ubicados en cuatro zonas; la leche se colectó de 160 vacas, correspondiendo a 40 vacas de cuatro hatos diferentes por zona, todo en dos épocas del año y por triplicado. Se calculó el factor de bioacumulación (BCF), el factor de translocación (TF) y el valor de transferencia de los metales de la planta a la leche. Las plantas tuvieron un BCF &lt;1, indicando que la alfalfa es resistente a los metales pesados. Sin embargo, el TF &gt;1 en orden decreciente quedó de la siguiente manera: Zn; Cu; Ni; Pb y Cr, lo que muestra la existencia de gran movilidad de los metales dentro de la planta. La leche tuvo un contenido de Pb en un rango de 0.039 ± 0.02 a 0.059 ± 0.05 mg kg-1, valores por arriba del límite internacional permitido. Sin embargo, los niveles de Pb y As fueron inferiores a los valores permisibles por la Norma Oficial Mexicana. Se concluye que la alfalfa es una planta acumuladora y resistente a los metales pesados, y cuando es cultivada en suelos contaminados, se convierte en un medio importante para la trasferencia de metales pesados a los animales y son eliminados a través de la leche.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The objective was to determine the presence of Cd, Pb, Ni, Cu, Cr, Zn and As in the food chain of cow's milk, produced in areas where alfalfa is cultivated in irrigated soils with industrial, domestic and agricultural wastewater. Soil and alfalfa were sampled from 16 sites located in four zones; milk was collected from 160 cows, corresponding to 40 cows from four different herds per zone, all in two seasons of the year and in triplicate. The bioaccumulation factor (BCF), the translocation factor (TF) and the transfer value of the metals from the plant to the milk were calculated. The plants had a BCF &lt;1, indicating that alfalfa is resistant to heavy metals. However, the TF &gt;1 in decreasing order was left as follows: Zn; Cu; Ni; Pb and Cr, which shows the existence of great mobility of metals within the plant. The milk had a Pb content in a range of 0.039 ± 0.02 to 0.059 ± 0.05 mg kg-1, values &#8203;&#8203;above the international allowed limit. However, the levels of Pb and As were lower than the permissible values &#8203;&#8203;by the Official Mexican Standard. It is concluded that alfalfa is an accumulator plant and resistant to heavy metals and when it is cultivated in contaminated soils, it becomes an important medium for the transfer of heavy metals to animals and they are eliminated through milk.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bioacumulación]]></kwd>
<kwd lng="es"><![CDATA[Translocación]]></kwd>
<kwd lng="es"><![CDATA[Metales pesados]]></kwd>
<kwd lng="es"><![CDATA[Contaminación alimentaria]]></kwd>
<kwd lng="es"><![CDATA[Leche]]></kwd>
<kwd lng="en"><![CDATA[Bioaccumulation]]></kwd>
<kwd lng="en"><![CDATA[Translocation]]></kwd>
<kwd lng="en"><![CDATA[Heavy metals]]></kwd>
<kwd lng="en"><![CDATA[Food contamination]]></kwd>
<kwd lng="en"><![CDATA[Milk]]></kwd>
</kwd-group>
</article-meta>
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