<?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>2224-5421</journal-id>
<journal-title><![CDATA[Revista Cubana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cub Quim]]></abbrev-journal-title>
<issn>2224-5421</issn>
<publisher>
<publisher-name><![CDATA[Ediciones UO, Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-54212022000100087</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Pretratamientos aplicados a biomasas lignocelulósicas: una revisión de los principales métodos analíticos utilizados para su evaluación]]></article-title>
<article-title xml:lang="en"><![CDATA[Lignocellulosic biomasses pretreatment: a review of the main analytical methods used in its evaluation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Negrín]]></surname>
<given-names><![CDATA[Ana María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-González]]></surname>
<given-names><![CDATA[Lisbet Mailin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casdelo-Gutiérrez]]></surname>
<given-names><![CDATA[Neybis Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sancti Spíritus &#8220;José Martí Pérez&#8221; Centro de Estudios de Energía y Procesos Industriales (CEEPI) ]]></institution>
<addr-line><![CDATA[Sancti Spíritus ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Central &#8220;Marta Abreu&#8221; de Las Villas Facultad de Química y Farmacia Departamento de Licenciatura Química]]></institution>
<addr-line><![CDATA[Villa Clara ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>34</volume>
<numero>1</numero>
<fpage>87</fpage>
<lpage>110</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-54212022000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-54212022000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-54212022000100087&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La identificación del tipo y las mejores condiciones de pretratamiento para procesos de bioconversión de biomasas lignocelulósicas, requiere evaluar los cambios estructurales y composicionales después de su aplicación. En este trabajo se presenta una revisión de los principales métodos empleados para la evaluación de pretratamientos en biomasas lignocelulósicas, haciendo énfasis en los utilizados para mejorar la producción de biogás. Se concluye que los procedimientos modernos que emplean técnicas como la cromatografía para la cuantificación son más exactos, pero muy costosos y trabajosos, por lo que se continúan empleando métodos clásicos, como Weender y Van Soest para el análisis de carbohidratos estructurales y lignina, así como la potenciometría y colorimetría como alternativas atractivas en otras determinaciones. Los cambios cualitativos de sus componentes, así como la relocalización y forma de interacción entre ellos, es otro aspecto de suma importancia a la hora de interpretar los resultados obtenidos por la aplicación de pretratamientos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Identifying the type and best lignocellulosic biomass pretreatment conditions for bioconversion processes requires structural and compositional changes evaluating after its application. This paper presents a review of the main methods used for pretreatments evaluation in lignocellulosic biomass, with emphasis in those used to improve biogas production. It is concluded that modern procedures that use techniques such as chromatography for quantification are more accurate, but very expensive and laborious, which is why classical methods, such as Weender and Van Soest for the analysis of structural carbohydrates and lignin, continue to be used, and potentiometry and colorimetry results attractive alternatives in other determinations. The qualitative changes of its components, such as relocation and the way in which they interact, is another important aspect when interpreting results obtained by applying pretreatments.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biomasa lignocelulósica]]></kwd>
<kwd lng="es"><![CDATA[composición]]></kwd>
<kwd lng="es"><![CDATA[estructura]]></kwd>
<kwd lng="es"><![CDATA[pretratamiento]]></kwd>
<kwd lng="en"><![CDATA[composition]]></kwd>
<kwd lng="en"><![CDATA[lignocellulosic biomass]]></kwd>
<kwd lng="en"><![CDATA[pretreatment]]></kwd>
<kwd lng="en"><![CDATA[structure]]></kwd>
</kwd-group>
</article-meta>
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