<?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>2007-0705</journal-id>
<journal-title><![CDATA[Nova scientia]]></journal-title>
<abbrev-journal-title><![CDATA[Nova scientia]]></abbrev-journal-title>
<issn>2007-0705</issn>
<publisher>
<publisher-name><![CDATA[Universidad de La Salle Bajío A. C., Coordinación de Investigación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-07052016000200361</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Bacillus sp. G3 un microorganismo promisorio en la biorremediación de aguas industriales contaminadas con cromo hexavalente]]></article-title>
<article-title xml:lang="en"><![CDATA[Bacillus sp. G3 a promissory microorganism in bioremediation of industrial wastewater contaminated with hexavalent chromium]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora Collazos]]></surname>
<given-names><![CDATA[Alexander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle Departamento de Biología ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<volume>8</volume>
<numero>17</numero>
<fpage>361</fpage>
<lpage>378</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-07052016000200361&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-07052016000200361&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-07052016000200361&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: El presente trabajo tuvo como objetivo identificar y caracterizar microorganismos provenientes de un agua residual industrial potencialmente útiles en biorremediación de aguas contaminadas con cromo hexavalente.  Metodología: Se realizó el aislamiento de tres microorganismos partiendo de un agua residual industrial proveniente de una empresa de galvanoplastia. Se evaluó el potencial de los microorganismos aislados en su capacidad para reducir cromo hexavalente; escogiéndose al aislado bacteriano G3 por mostrase potencialmente útiles en biorremediación de cromo hexavalente. Se realizó la caracterización morfológica, bioquímica e inferencias filogenéticas basadas en el gen del ARNr 16S del aislado seleccionado; se evaluó el potencial de reducción de cromo hexavalente asociado a la actividad microbiana y la actividad enzimática utilizando un extracto libre de células; de forma adicional, se realizaron bioensayos de reducción de cromo evaluando la acción conjunta de los 3 microorganismos.  Resultados: Los datos moleculares y pruebas bioquímicas sugieren que el asilado bacteriano G3 pertenece al grupo de Bacillus cereus sensu lato. Los bioensayos de reducción de cromo hexavalente (10 mg/L) realizados con Bacillus sp. G3 mostraron una reducción química del 100% del contaminante al cabo de diez horas en medio LB y de 34 horas en agua residual industrial. El extracto libre de células obtenido a partir del aislado bacteriano G3 mostró actividad de cromato reductasa al reducir el cromo hexavalente a su forma trivalente, mostrando valores óptimos de actividad relativa a 28ºC y 6.5 de pH. La acción conjunta de los microorganismos sobre la reducción de cromo se mostró cinco veces menos eficiente que los ensayos realizados solo con la cepa G3.  Discusión o conclusión: Los resultados sugieren, que el aislado bacteriano G3 se muestra como un microorganismo con buen potencial para utilizarse en procesos de biorremediación de aguas contaminadas con cromo hexavalente, en particular en aguas industriales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: The current study aimed to identify and characterize promissory microorganisms in bioremediation of waters contaminated with hexavalent chromium.  Method: The isolation and purification of three bacterial isolates from a electroplating was achieved, of the three microorganisms isolated was chosen the bacterial isolated G3 for showed a good potential in bioremediation of hexavalent chromium. The morphological and biochemical characterization and phylogenetic inferences based in the gene of the rRNA 16S of isolated selected was performed; current study evaluated the potential for the reduction of hexavalent chromium associated to biological activity and enzyme activity of chromate reductases using cell-free extract. Additionally, bioassays of reduction of hexavalent chromium with the three microorganisms isolated was performed.  Results: Biochemical tests and analysis of the 16S rRNA gene suggest that the bacterial isolated G3 belongs to Bacillus cereus sensu lato group. The 100% of reduction of hexavalent chromium in bioassays for 10 mg/L was reached at 10 hour in LB medium and 34 hours in industrial wastewater. The cell-free extract showed chromium reduction activity with optimum values at the temperature of 28°C and pH 6.5. The assay realized with the three microorganisms together on the reduction of chromium is showed five times less efficient than the assays realized only with the strain G3.  Discussion or Conclusion: The results suggest that Bacillus sp. G3 is a promissory microorganism with good potential for bioremediation processes of water contaminated with hexavalent chromium, in particular concerning detoxification of industrial wastewater.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Agua residual industrial]]></kwd>
<kwd lng="es"><![CDATA[Bacillus]]></kwd>
<kwd lng="es"><![CDATA[Cromo hexavalente]]></kwd>
<kwd lng="es"><![CDATA[extracto libre de células]]></kwd>
<kwd lng="en"><![CDATA[Bacillus]]></kwd>
<kwd lng="en"><![CDATA[cell-free extract]]></kwd>
<kwd lng="en"><![CDATA[hexavalent chromium]]></kwd>
<kwd lng="en"><![CDATA[industrial wastewater]]></kwd>
</kwd-group>
</article-meta>
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