<?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>S2224-54212020000200195</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nanopartículas magnéticas de óxido de hierro para el aislamiento de ADN plasmídico]]></article-title>
<article-title xml:lang="en"><![CDATA[Magnetic iron oxide nanoparticles for plasmid DNA isolation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morejón-Alonso]]></surname>
<given-names><![CDATA[Loreley]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wilson-Savón]]></surname>
<given-names><![CDATA[Liem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Masso]]></surname>
<given-names><![CDATA[Julio R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Águila]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Habana Facultad de Química Departamento de Química General e Inorgánica]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Ciencias del Mar  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Ingeniería Genética y Biotecnología Dpto de Biología de Sistemas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de La Habana Centro de Biomateriales ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2020</year>
</pub-date>
<volume>32</volume>
<numero>2</numero>
<fpage>195</fpage>
<lpage>217</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-54212020000200195&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-54212020000200195&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-54212020000200195&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El trabajo propone la síntesis y caracterización de nanopartículas magnéticas de óxido de hierro recubiertas con silica (Fe3O4@SiO2) para el aislamiento de ADN plasmídico. La síntesis se realizó por co-precipitación y el recubrimiento por el método de Stöber. Los materiales fueron caracterizados por Fluorescencia de Rayos-X, Difracción de Rayos-X y Espectroscopía infrarroja. La purificación del ADN se realizó comparando los métodos de precipitación etanólica, el sistema comercial QIAprep® y las Fe3O4@SiO2 sintetizadas. Los resultados mostraron que es posible obtener Fe3O4@SiO2 con tamaños de cristalita en un rango de 9,9 a 11,7 nm por la metodología propuesta. La cantidad de Si adsorbida sobre la superficie de las nanopartículas y el tamaño de cristalita de las Fe3O4@SiO2, fueron dependientes del pH y de las condiciones de lavado. Se demostró que es posible recuperar eficientemente ADN plasmídico, utilizando como soporte sólido las Fe3O4@SiO2 obtenidas en condiciones normales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The aim of this work was the synthesis and characterization of iron oxide magnetic nanoparticles coated with silica (Fe3O4@SiO2) intended for plasmid DNA isolation. Synthesis was carried out through co-precipitation method and coating was performed used the Stöber method. Materials were characterized by X-ray fluorescence, X-ray diffraction and Infrared spectroscopy. DNA purification was performed by comparing the ethanolic precipitation method, the QIAprep® commercial DNA purification kit and the synthesized Fe3O4@SiO2. Results showed that is possible to obtain Fe3O4@SiO2 (ranging size from 9 to 12 nm) through the proposed methodology. The amount of Si adsorbed onto the surface of magnetic particles and the crystal size of the Fe3O4@SiO2 were pH and washing-conditions dependent. The isolation assay showed that it is possible to recovery efficiently plasmid DNA using the Fe3O4@SiO2 obtain in normal conditions as solid support.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[nanopartículas]]></kwd>
<kwd lng="es"><![CDATA[magnetita]]></kwd>
<kwd lng="es"><![CDATA[silica]]></kwd>
<kwd lng="es"><![CDATA[stöber]]></kwd>
<kwd lng="es"><![CDATA[purificación de ADN]]></kwd>
<kwd lng="en"><![CDATA[nanoparticles]]></kwd>
<kwd lng="en"><![CDATA[magnetite]]></kwd>
<kwd lng="en"><![CDATA[silica]]></kwd>
<kwd lng="en"><![CDATA[Stöber]]></kwd>
<kwd lng="en"><![CDATA[DNA extraction]]></kwd>
</kwd-group>
</article-meta>
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