<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952016000500575</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Uso de carbón activado para conservar bacterias celulolíticas liofilizadas]]></article-title>
<article-title xml:lang="en"><![CDATA[Use of activated carbon to preserve lyophilized cellulolytic bacteria]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Santillán]]></surname>
<given-names><![CDATA[Paulino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cobos-Peralta]]></surname>
<given-names><![CDATA[Mario A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Sánchez]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarado-Iglesias]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Victoria]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Haro]]></surname>
<given-names><![CDATA[José G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Guerrero Unidad Académica de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Cuajinicuilapa Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Programa de Ganadería ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional del Litoral Instituto de Agrobiotecnología del Litoral ]]></institution>
<addr-line><![CDATA[Santa Fe ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Colegio de Postgraduados Programa de Suelos ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<volume>50</volume>
<numero>5</numero>
<fpage>575</fpage>
<lpage>582</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952016000500575&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952016000500575&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952016000500575&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El éxito de la conservación de microorganismos se logra al evitar contaminaciones en el proceso, y al optimizar la sobrevivencia alta y la estabilidad genética. El objetivo de este estudio fue evaluar el uso del carbón activado como preservador de bacterias celulolíticas en el proceso de liofilización. El cultivo de bacterias celulolíticas se obtuvo de cuatro trasferencias de fluido ruminal fresco en medios de cultivo y papel Whatman. Como preservador se adicionó carbón activado (CA), antes de liofilizar, y se comparó con un tratamiento testigo sin preservador (SL). Las bacterias liofilizadas se reactivaron en medios de cultivo, en los cuales se midieron sus características y las de las bacterias. Las bacterias reactivadas fueron el inóculo para evaluar la degradación in vitro de la materia seca (%DEGMS) y la producción de ácidos grasos volátiles (AGV). El diseño experimental fue completamente al azar repetido en el tiempo. El tratamiento CA degradó 83.3 % de papel Whatman en la reactivación. En la reactivación de las bacterias el potencial óxido-reducción y el pH de los medios de cultivo no fueron diferentes entre tratamientos (p&gt;0.05). El tratamiento CA mostró concentración mayor de bacterias (9.58×108 bacterias mL-1), degradación mayor de sustratos (32.75 %DEGMS), producción mayor de ácido acético (54.50 mM L-1) y butírico (12.74 mM L-1), comparado con el tratamiento SL (p&#8804;0.05). El ácido propiónico y AGV totales presentaron interacción significativa de tratamiento-tiempo. El tratamiento CA produjo más AGV totales (p&#8804;0.05), pero el ácido propiónico sólo fue diferente entre tratamientos en el primer tiempo de medición (p&#8804;0.05). El carbón activado tiene características de preservador de bacterias celulolíticas para la liofilización.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Successful conservation of microorganisms is attained by preventing contamination during the process and optimizing high survival and genetic stability. The objective of this study was to evaluate the use of activated carbon as a preserver of cellulolytic bacteria during the process of lyophilization. The cellulolytic bacterial culture was obtained from four transfers of fresh ruminal liquid in culture media and Whatman paper. As a lyoprotectant, activated carbon (CA) was added before lyophilizing and compared with a control treatment without lyoprotectant (SL). The lyophilized bacteria were reactivated in culture media; characteristics of both media and bacteria were measured. The reactivated bacteria were the inoculum in the evaluation of in vitro dry matter degradation (%DMDEG) and production of volatile fatty acids (VFA). The experimental design was completely randomized repeated in time. The CA treatment degraded 83.3% of the Whatman paper during reactivation. The oxide-reduction potential and culture media pH were not different between treatments (p&gt;0.05). The CA treatment showed higher concentration of bacteria (9.58×108 bacteria mL-1), greater degradation of substrates (32.75 %DMDEG), and higher production of acetic (54.50 mM L-1) and butyric (12.74 mM L-1) acids, compared to the SL treatment (p&#8804;0.05). Propionic acid and total VFA showed significant treatment-time interaction. The CA treatment produced more total VFA (p&#8804;0.05), but propionic acid was different only between treatments at the first measurement time (p&#8804;0.05). Activated carbon has characteristics that preserve cellulolytic bacteria for lyophilization.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Preservador]]></kwd>
<kwd lng="es"><![CDATA[bacterias ruminales]]></kwd>
<kwd lng="es"><![CDATA[in vitro]]></kwd>
<kwd lng="es"><![CDATA[liofilización]]></kwd>
<kwd lng="es"><![CDATA[degradación]]></kwd>
<kwd lng="en"><![CDATA[Lyoprotectant]]></kwd>
<kwd lng="en"><![CDATA[ruminal bacteria]]></kwd>
<kwd lng="en"><![CDATA[in vitro]]></kwd>
<kwd lng="en"><![CDATA[lyophilization]]></kwd>
<kwd lng="en"><![CDATA[degradation]]></kwd>
</kwd-group>
</article-meta>
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