<?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>1405-7743</journal-id>
<journal-title><![CDATA[Ingeniería, investigación y tecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. invest. y tecnol.]]></abbrev-journal-title>
<issn>1405-7743</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-77432016000300331</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Bioconversión de glicerol a dihidroxiacetona usando un proceso fed-batch mediante fermentación con Gluconobacter oxydans]]></article-title>
<article-title xml:lang="en"><![CDATA[Bioconversion of Glycerol to Dihydroxyacetone Using a Fed-Batch by a Fermentation Process with Gluconobacter Oxydans]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De Avila-Montiel]]></surname>
<given-names><![CDATA[Gezira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Realpe-Jiménez]]></surname>
<given-names><![CDATA[Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duran-Ariza]]></surname>
<given-names><![CDATA[Jhon Edward]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acevedo-Morantes]]></surname>
<given-names><![CDATA[María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bonfante-Álvarez]]></surname>
<given-names><![CDATA[Heidy Yaneth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Cartagena Facultad de ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Cartagena Facultad de ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Cartagena Facultad de ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Cartagena Facultad de ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Cartagena Facultad de ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>17</volume>
<numero>3</numero>
<fpage>331</fpage>
<lpage>341</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-77432016000300331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-77432016000300331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-77432016000300331&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La conversión de glicerol a dihidroxiacetona (DHA) se realizó mediante un proceso fed-batch, con concentraciones de glicerol de 50 y 100 g/l, utilizando la bacteria Gluconobacter oxydans. La fermentación se realizó durante 72 h, un pH de 5.3 y una temperatura de 30 °C, bajo un flujo de aireación de 1.66 vvm. La cantidad de DHA producida y el glicerol consumido se determinaron aplicando cromatografía de gases y espectrofotometría UV-VIS. Se obtuvo un rendimiento producto/sustrato de 91% para una concentración de glicerol de 50 g/l y 79% para una concentración de glicerol 100 g/l. Estos números demuestran que el fenómeno de inhibición se da a altas concentraciones de sustrato y también se observó un menor crecimiento de biomasa. Estos hallazgos demuestran que es viable la producción de dihidroxiacetona a partir de glicerol a un bajo costo, además de solucionar el importante problema de acumulación y contaminación, que el glicerol representa en la producción industrial de biodiesel.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The objective of this work was the convertion of glycerol to dihydroxyacetone (DHA) by a fed-batch process at different glycerol concentrations, 50 and 100 g/l, using Gluconobacter oxydans. The fermentation was conducted during 72 h, at a pH 5.3 and 30 °C under a flow of 1.66 vvm aeration. The amounts of produced DHA and consumed glycerol, were determined using gas chromatography and UV-VIS spectrophotometry. Product-substrate yields were obtained to 91% and 79% for concentrations of glycerol 50 g/l and 100 g/l, respectively, which showed the inhibition phenomenon to high substrate concentrations and reduced biomass growth. This research shows that the production of dihydroxyacetone from glycerol is feasible and inexpensive Therefore, it is possible to solve, future problems about pollution and accumulation of glycerol.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biodiesel]]></kwd>
<kwd lng="es"><![CDATA[glicerol]]></kwd>
<kwd lng="es"><![CDATA[Gluconobacter oxydans]]></kwd>
<kwd lng="es"><![CDATA[dihidroxiacetona]]></kwd>
<kwd lng="es"><![CDATA[fed-batch]]></kwd>
<kwd lng="en"><![CDATA[biodiesel]]></kwd>
<kwd lng="en"><![CDATA[glycerol]]></kwd>
<kwd lng="en"><![CDATA[Gluconobacter oxydans]]></kwd>
<kwd lng="en"><![CDATA[dihydroxyacetone]]></kwd>
<kwd lng="en"><![CDATA[fed-batch]]></kwd>
</kwd-group>
</article-meta>
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