<?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>0258-5936</journal-id>
<journal-title><![CDATA[Cultivos Tropicales]]></journal-title>
<abbrev-journal-title><![CDATA[cultrop]]></abbrev-journal-title>
<issn>0258-5936</issn>
<publisher>
<publisher-name><![CDATA[Ediciones INCA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0258-59362020000100006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estabilidad química y actividad biológica del QuitoMax® durante su almacenamiento]]></article-title>
<article-title xml:lang="en"><![CDATA[Chemical stability and biological activity of QuitoMax® during storage]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mederos-Torres]]></surname>
<given-names><![CDATA[Yuliem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Arrebato]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Falcón-Rodríguez]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bernabé-Galloway]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[María-Moreno]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Ciencias Agrícolas (INCA)  ]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Unidad Científico Tecnológica de Base "Los Palacios"  ]]></institution>
<addr-line><![CDATA[Los Palacios Pinar del Río]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto de Ciencia y Tecnología de Materiales, Laboratorio de Polímeros  ]]></institution>
<addr-line><![CDATA[Vedado La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>41</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0258-59362020000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0258-59362020000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0258-59362020000100006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El QuitoMax® es un producto biológicamente activo, biocompatible y biodegrabable a base de quitosano. Tiene la capacidad de estimular el crecimiento y rendimiento vegetal e inducir mecanismos defensivos contra patógenos. Independientemente de su campo de acción, este producto debe ser capaz de mantener sus características químicas durante el almacenamiento. Los objetivos de este trabajo fueron evaluar las características químicas del QuitoMax® durante el almacenamiento y la actividad biológica en posturas de tomate. Se determinó la conductividad, el pH y la masa de quitosano soluble como características químicas. A las semillas previamente tratadas con QuitoMax® se les evaluó la germinación y las variables morfoagronómicas de las posturas de tomate a los 25 días de sembradas. Como resultados no se evidenciaron cambios significativos en la conductividad, el pH y la masa de quitosano soluble en el periodo evaluado. De igual forma, no se apreciaron diferencias entre el producto conservado y uno recién producido al evaluar la germinación y la altura de la planta. Los resultados obtenidos demuestran que el producto mantiene las características químicas y la actividad biológica a los 270 días de conservación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT QuitoMax® is a biologically active, biocompatible and biodegradable product based on chitosan. It has the ability to stimulate plant growth, yield and induce defensive mechanisms against pathogens. Regardless of its field of action, this product must be able to maintain its chemical characteristics during storage. The objectives of this work were to evaluate the chemical characteristics of QuitoMax® during storage and biological activity in tomato seedlings. The conductivity, pH and mass of soluble chitosan were determined as chemical characteristics. Seeds previously treated with QuitoMax® were evaluated for germination and morphoagronomic variables of tomato postures 25 days after planting. As results, there were no significant changes in conductivity, pH and mass of soluble chitosan in the period evaluated. Likewise, no differences were between the conserved product found and one newly produced when evaluating the germination and plants height. The results obtained show that the product maintains the chemical characteristics and biological activity at 270 days of conservation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[quitina]]></kwd>
<kwd lng="es"><![CDATA[conductividad]]></kwd>
<kwd lng="es"><![CDATA[polímero]]></kwd>
<kwd lng="es"><![CDATA[quitosano]]></kwd>
<kwd lng="en"><![CDATA[chitin]]></kwd>
<kwd lng="en"><![CDATA[conductivity]]></kwd>
<kwd lng="en"><![CDATA[polymer]]></kwd>
<kwd lng="en"><![CDATA[chitosan]]></kwd>
</kwd-group>
</article-meta>
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