<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992017000300529</article-id>
<article-id pub-id-type="doi">10.20937/rica.2017.33.03.15</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[BÚSQUEDA DE CAPACIDAD PRODUCTORA DE BIOSURFACTANTES EN ACTINOBACTERIAS HALOALCALÓFILAS Y HALOALCALOTOLERANTES]]></article-title>
<article-title xml:lang="en"><![CDATA[SEARCHING FOR THE BIOSURFACTANT PRODUCTION CAPACITY OF HALOALKALIFILIC AND HALOALKALITOLERANT ACTINOBACTERIA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lara-Severino]]></surname>
<given-names><![CDATA[Reyna del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez Olivan]]></surname>
<given-names><![CDATA[Leobardo Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval Trujillo]]></surname>
<given-names><![CDATA[Ángel Horacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Isaac-Olive]]></surname>
<given-names><![CDATA[Keila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Durán]]></surname>
<given-names><![CDATA[Ninfa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Medicina ]]></institution>
<addr-line><![CDATA[Toluca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Química ]]></institution>
<addr-line><![CDATA[Toluca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Sistemas Biológicos ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>529</fpage>
<lpage>539</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992017000300529&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992017000300529&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992017000300529&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Una opción para biorremediar ambientes salinos contaminados con compuestos orgánicos hidrofóbicos, es el uso de microorganismos haloalcalófilos o haloalcalotolerantes capaces de producir biosurfactantes estables y consumir al compuesto hidrófobo. El biosurfactante solubiliza al contaminante haciéndolo biodisponible para el microrganismo. De estudios previos se conocía la capacidad de siete actinobacterias haloalcalotolerantes para transformar el antraceno. En este trabajo, a estas siete más 11 más aisladas de ambientes salinos, se les determinó la capacidad para producir biosurfactantes con propiedades emulsificantes. A las que la mostraron, fueron seleccionadas para saber si utilizaban al antraceno como única fuente de carbono y energía. La capacidad para producir biosurfactante fue determinada por los métodos de actividad hemolítica, gota colapsada y difusión del diámetro de la gota. La propiedad emulsificante y la estabilidad de la emulsión se caracterizaron con el índice de emulsificación y el índice de emulsificación relativo, respectivamente. De 18 actinobacterias evaluadas, cinco cepas mostraron capacidad para producir biosurfactantes con propiedades emulsificantes, alta estabilidad en la emulsión y utilización de antraceno como única fuente de carbono y energía. De estas cinco, dos son haloalcalófilas pertenecientes a la especie Nocardiopsis salina y tres son haloalcalotolerantes pertenecientes a las especies: Kocuria palustris, Microbacterium testaceum y Kocuria rosea. En un estudio previo se determinó la capacidad transformadora de antraceno en las tres cepas haloalcalotolerantes, por lo tanto los resultados de este estudio sugieren proponerlas como candidatas para procesos de biorremediación de ambientes salinos contaminados con compuestos hidrófobos. Asimismo se sugiere determinar la misma capacidad para las dos cepas haloalcalófilas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT One option for bioremediation of saline environments contaminated with hydrophobic organic compounds is the use of haloalkaliphilic or haloalkalitolerant microorganisms capable of producing stable biosurfactants and consuming the hydrophobic compound. The biosurfactant solubilizes the contaminant making it bioavailable for the microorganism. Previous studies have revealed the ability to transform anthracene from seven haloalkalitolerant actinobacteria. In this work the ability to produce biosurfactants with emulsifying properties from these seven plus 11 isolates of saline environments were determined. Those that showed the capability were investigated for anthracene as their only source of carbon and energy. The ability to produce biosurfactant was determined by methods of hemolytic activity, collapsed droplet and diffusion of droplet diameter. The emulsifying property and the stability of the emulsion were characterized by the emulsification index and the relative emulsification index, respectively. Of 18 actinobacteria evaluated, five strains showed capacity to produce biosurfactants with emulsifying properties, high stability in the emulsion and the use of anthracene as their only source of carbon and energy. Of these five strains, two are haloalkaliphilic, they belong to the species Nocardiopsis salina and three are haloalkalitolerant, they belong to the species Kocuria palustris, Microbacterium testaceum and Kocuria rosea. In a previous study the transforming capacity of anthracene of the three haloalkalitolerant strains was determined; therefore the results of this study suggest they can be proposed as candidates for bioremediation processes of saline environments contaminated with hydrophobic compounds. Likewise it is also recommended to determine the same capacity for the two haloalkaliphilic strains.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bacteria]]></kwd>
<kwd lng="es"><![CDATA[emulsificante]]></kwd>
<kwd lng="es"><![CDATA[tensoactivo]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[biorremediación]]></kwd>
<kwd lng="en"><![CDATA[bacteria]]></kwd>
<kwd lng="en"><![CDATA[emulsifier]]></kwd>
<kwd lng="en"><![CDATA[surfactant]]></kwd>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="en"><![CDATA[bioremediation]]></kwd>
</kwd-group>
</article-meta>
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