<?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>2007-4018</journal-id>
<journal-title><![CDATA[Revista Chapingo serie ciencias forestales y del ambiente]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo ser. cienc. for. ambient]]></abbrev-journal-title>
<issn>2007-4018</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40182007000200163</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[EFECTO DEL PEG 300 Y 600 EN LA ESTABILIDAD DIMENSIONAL DE LA MADERA Aspidosperma quebracho-blanco Schlecht]]></article-title>
<article-title xml:lang="en"><![CDATA[EFFECT OF THE PEG 300 AND 600 ON THE DIMENSIONAL STABILITY OF WOOD Aspidosperma quebracho-blanco Schlecht]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sanabria]]></surname>
<given-names><![CDATA[E. O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cayré]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Frank]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional del Nordeste Facultad de Agroindustrias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2007</year>
</pub-date>
<volume>13</volume>
<numero>2</numero>
<fpage>163</fpage>
<lpage>167</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182007000200163&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182007000200163&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182007000200163&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La especie Aspidosperma quebracho-blanco Schlecht es la más abundante del Parque Chaqueño y no es utilizada en la producción de bienes de alto valor agregado debido a la inestabilidad dimensional de su madera. Una de las maneras de mejorar la estabilidad dimensional es el engrosado de la pared celular con polietilenglicol (PEG). El objetivo de este trabajo fue determinar el efecto del PEG de peso molecular 300 y 600 en la estabilidad dimensional, utilizando como parámetro de control el coeficiente de retractabilidad de la madera citada. Las muestras se impregnaron en una Planta Piloto con PEG, a través del proceso Bethell, según Norma IRAM Núm. 9511. Posteriormente se secaron hasta un contenido de humedad (CH) del 10 %. Los mejores resultados se lograron impregnando la madera con PEG 600, a una concentración del 50 % en solución acuosa, a una presión de 12 kg·cm-2 durante 120 minutos, lo que permitió disminuir el coeficiente de retractabilidad de esta madera en 58.2 %.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY The species Aspidosperma quebracho-blanco Schlecht is the most abundant of the &#8220;Parque Chaqueño&#8221; region but it is not used for high added value goods production because of its dimensional instability. A way to enhance dimensional stability is the swelling of cell walls with polyethylene glycol (PEG). The aim of this work was to determine the effect of PEG, molecular weight 300 and 600, on the dimensional stability of this wood using the retractability coefficient as control parameter. Samples were impregnated with PEG in a pilot plant through the Bethell process, following the IRAM Nr. 9511 norm. Subsequently the samples were dried until humidity content (HC) of 10 %. The best results were achieved impregnating wood with PEG 600 at a concentration of 50 % in water solution, at a pressure level of 12 kg.cm-2 during 120 minutes. These conditions led to the decrease of 58.2 % of the retractability coefficient of this wood.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[polietilenglicol]]></kwd>
<kwd lng="es"><![CDATA[hinchamiento diferencial]]></kwd>
<kwd lng="es"><![CDATA[impregnación]]></kwd>
<kwd lng="es"><![CDATA[bethell]]></kwd>
<kwd lng="en"><![CDATA[polyethylene glycol]]></kwd>
<kwd lng="en"><![CDATA[differential swelling]]></kwd>
<kwd lng="en"><![CDATA[impregnation]]></kwd>
<kwd lng="en"><![CDATA[bethell]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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