<?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>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322016000200047</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Composición lignocelulósica de Pinus ayacahuite Ehrenb. ex Schltdl., P. leiophylla Schlecht. &amp; Cham. y P. herrerae Martínez]]></article-title>
<article-title xml:lang="en"><![CDATA[Lignocellulosic composition of Pinus ayacahuite Ehrenb. Ex Schltdl., P. leiophylla Schlecht. &amp; Cham.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Honorato Salazar]]></surname>
<given-names><![CDATA[José Amador]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Apolinar Hidalgo]]></surname>
<given-names><![CDATA[Flora]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Colotl Hernández]]></surname>
<given-names><![CDATA[Gertrudis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP Centro de Investigación Regional Golfo Centro Campo Experimental San Martinito]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>34</numero>
<fpage>47</fpage>
<lpage>56</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322016000200047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322016000200047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322016000200047&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En el municipio Pueblo Nuevo, Durango se produce la cuarta parte de la producción maderable estatal y 89 % se basa en 12 especies de Pinus; sin embargo, no existen estudios sobre la composición química de la madera de los pinos que se aprovechan. El objetivo de este trabajo fue determinar la composición lignocelulósica y los contenidos de cenizas, extractos en etanol-benceno y en etanol de la madera de Pinus ayacahuite, P. leiophyla y P. herrerae, de acuerdo con los procedimientos de las normas TAPPI y ASTM. Se tomaron muestras al azar de cinco a seis árboles por especie, con cinco repeticiones por árbol para cada prueba. Se efectuaron pruebas de normalidad y homogeneidad de varianzas de los datos obtenidos y una comparación múltiple de medias (Bonferroni, &#945; = 0.05) con el programa SAS. Con excepción del contenido de cenizas, los resultados mostraron que existen diferencias significativas entre especies (p &lt; 0.05), para los valores promedio de los contenidos determinados. La madera de Pinus ayacahuite tiene altos contenidos de extractos en etanol-benceno y de lignina. La de P. herreae presenta valores menores, pero los de holocelulosa y celulosa son superiores. La madera de P. leiophylla tiene contenidos de holocelulosa, celulosa, hemicelulosas y cenizas más bajos. La lignina, hemicelulosas y celulosa de la madera de loss taxa estudiados apoya su uso como fuente de materia prima para la obtención de pulpa para papel y biocombustibles líquidos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The municipality of Pueblo Nuevo, Durango, produces one fourth of the timber in the state, and 89 % of it is obtained from 12 pine species. However, there are no studies on the wood chemical composition of exploited pine trees. The aim of this study was to determine the lignocellulosic composition and the ash content, as well as the contents of extracts in ethanol-benzene and in ethanol, of Pinus ayacahuite, P. leiophylla and P. herrerae wood, according to the procedures of the TAPPI and ASTM standards. Random samples were taken from 5 to 6 trees per species, with 5 repetitions per tree per test. The collected data were subjected to normality and variance homogeneity tests and to a multiple comparison of means (Bonferroni, &#945; = 0.05) using the SAS software. The results showed significant differences between species (p &lt; 0.05) for the average values of the determined contents, with the exception of ash. Pinus ayacahuite wood has high contents of extracts in ethanol-benzene and lignin. P. herrerae wood has lower contents of extracts in ethanol-benzene and lignin, but higher contents of holocellulose and cellulose P. leiophylla wood has lower holocellulose, cellulose, hemicelluloses and ash. The contents of lignin, hemicelluloses and cellulose of the wood of these species support its use as a source of raw materials for obtaining pulp for paper and liquid biofuels.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cenizas]]></kwd>
<kwd lng="es"><![CDATA[celulosa]]></kwd>
<kwd lng="es"><![CDATA[composición química]]></kwd>
<kwd lng="es"><![CDATA[extractos]]></kwd>
<kwd lng="es"><![CDATA[lignina]]></kwd>
<kwd lng="es"><![CDATA[pinos]]></kwd>
<kwd lng="en"><![CDATA[Ashes]]></kwd>
<kwd lng="en"><![CDATA[cellulose]]></kwd>
<kwd lng="en"><![CDATA[chemical composition]]></kwd>
<kwd lng="en"><![CDATA[extracts]]></kwd>
<kwd lng="en"><![CDATA[lignin]]></kwd>
<kwd lng="en"><![CDATA[pine trees]]></kwd>
</kwd-group>
</article-meta>
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