<?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>1405-0471</journal-id>
<journal-title><![CDATA[Madera y bosques]]></journal-title>
<abbrev-journal-title><![CDATA[Madera bosques]]></abbrev-journal-title>
<issn>1405-0471</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-04712005000200049</article-id>
<article-id pub-id-type="doi">10.21829/myb.2005.1121256</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia de los radios en algunas propiedades físicas y mecánicas de la madera de ocho encinos (Quercus) de Durango, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz Pérez Olvera]]></surname>
<given-names><![CDATA[Carmen de la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dávalos Sotelo]]></surname>
<given-names><![CDATA[Raymundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintanar Isaías]]></surname>
<given-names><![CDATA[Paz Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana División de Ciencias Biológicas y de la Salud Departamento de Biología]]></institution>
<addr-line><![CDATA[Iztapalapa ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Ecología, A.C. Unidad de Recursos Forestales ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>49</fpage>
<lpage>68</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-04712005000200049&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-04712005000200049&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-04712005000200049&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se presenta la relación del parénquima radial (radios uniseriados y multiseriados) con la contracción volumétrica y las propiedades mecánicas de flexión, compresión paralela y perpendicular y el cortante paralelo de la madera de ocho especies de encinos de Durango, México. Para determinar la relación de los radios con las propiedades tecnológicas, se hizo un análisis de regresión multivariado en donde las variables dependientes fueron los valores anatómicos y las independientes los valores físicos y mecánicos. Los resultados muestran que la altura y anchura de los radios multiseriados son los caracteres anatómicos de mayor influencia en las propiedades tecnológicas. Se resalta que en la selección de la madera de encino para su aprovechamiento, se deben considerar las características anatómicas, físicas y mecánicas, que influyen en su manejo para aprovechar de manera óptima este recurso y lograr la conservación de los encinares y preservar el equilibrio ecológico de los sitios donde crecen.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The relations between the radial parenchyma (uniseriate and multiseriate rays) and volumetric shrinkage and with the mechanical properties of eight Durango woods are presented. The mechanical properties studied are: static bending, compression parallel-to-grain, compression perpendicular-to-grain and shear parallel-to-grain. The relationship between the anatomical and physical properties was determined through stepwise regression analysis. The dependent variables were the anatomical values and the independent ones were the physical and mechanical values. It was determined that the height and width of multiseriate rays are the anatomical characters with the greatest influence in all properties. It was concluded that the selection of oak wood species in the transformation processes is an urgent task and that the anatomical and physical characteristics that influence its management must be considered in order to utilize this resource in an optimal way and to be able to achieve the conservation of oak forests and the preservation of the ecological equilibrium of the places where they grow.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Contracción volumétrica]]></kwd>
<kwd lng="es"><![CDATA[Durango]]></kwd>
<kwd lng="es"><![CDATA[encino]]></kwd>
<kwd lng="es"><![CDATA[madera]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[propiedades mecánicas]]></kwd>
<kwd lng="es"><![CDATA[radios]]></kwd>
<kwd lng="en"><![CDATA[Volumetric shrinkage]]></kwd>
<kwd lng="en"><![CDATA[Durango]]></kwd>
<kwd lng="en"><![CDATA[oak]]></kwd>
<kwd lng="en"><![CDATA[wood]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[mechanical properties]]></kwd>
<kwd lng="en"><![CDATA[Rays]]></kwd>
</kwd-group>
</article-meta>
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