<?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>2448-6760</journal-id>
<journal-title><![CDATA[Veterinaria México OA]]></journal-title>
<abbrev-journal-title><![CDATA[Veterinaria México OA]]></abbrev-journal-title>
<issn>2448-6760</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-67602014000100003</article-id>
<article-id pub-id-type="doi">10.21753/vmoa.1.1.333</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Freezing, thawing and aging improves the tenderness of chuck muscles from young bulls of different phenotypes]]></article-title>
<article-title xml:lang="es"><![CDATA[La estrategia de congelación, descongelación y maduración mejora la suavidad de los músculos del cuarto delantero de toretes sin castrar de diferentes fenotipos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio Lozano]]></surname>
<given-names><![CDATA[María Salud]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Buitrón]]></surname>
<given-names><![CDATA[Esmeralda Vanessa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez Medina]]></surname>
<given-names><![CDATA[Rubén Danilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez Gómez]]></surname>
<given-names><![CDATA[Adrián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado Suárez]]></surname>
<given-names><![CDATA[Enrique Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[México DF]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Patología]]></institution>
<addr-line><![CDATA[México DF]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Medicina Preventiva y Salud Pública]]></institution>
<addr-line><![CDATA[México DF]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<volume>1</volume>
<numero>1</numero>
<fpage>0</fpage>
<lpage>0</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-67602014000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-67602014000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-67602014000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We evaluated eleven chuck muscles from phenotypically selected Brahman (BR, n =10) and Charolais (CH, n =10) young bull carcasses for the effect of freezing, thawing, and aging for 2, 9, 16, and 23 days on Warner-Bratzler shear force (WBSF). Splenius, infraspinatus, teres major, rhomboideus, and subscapularis from both phenotypes, and complexus from CH had tender (&#8804; 40 N) 9 d WBSF values. No further improvement in WBSF was observed beyond 9 days of aging. Overall, we observed freezing, thawing and aging of several chuck muscles from young bulls significantly improves beef tenderness. Further studies would help optimizing this tenderization strategy and assess its potential impact on other meat quality attributes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se evaluó el efecto de la congelación seguida de la descongelación y maduración por 2, 9, 16 y 23 días en la fuerza de corte Warner-Bratzler (FC) en 11 músculos del cuarto delantero de toretes sin castrar de origen Brah man (BR, n = 10) y Charolais (CH, n = 10) seleccionados fenotípicamente. Splenius, infraspinatus, teres major, rhomboideus, y subscapularis de ambos fenotipos, y complexus de CH tuvieron valores típicos de carne suave (FC &lt; 40 N) a los 9 días de maduración. La FC no mejoró después de los 9 días de maduración. En general, se observó que la congelación con una posterior descongelación y maduración de varios de los músculos estudiados mejoró significativamente la suavidad de la carne. Se requiere realizar otros estudios para optimizar esta estrategia de ablandamiento, así como para evaluar su posible impacto en otros atributos de la calidad de la carne.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Beef quality]]></kwd>
<kwd lng="en"><![CDATA[Aging]]></kwd>
<kwd lng="en"><![CDATA[Forequarter muscles]]></kwd>
<kwd lng="en"><![CDATA[Warner-Bratzler shear force]]></kwd>
<kwd lng="en"><![CDATA[Young bulls]]></kwd>
<kwd lng="es"><![CDATA[Calidad de la carne]]></kwd>
<kwd lng="es"><![CDATA[Maduración]]></kwd>
<kwd lng="es"><![CDATA[Músculos de la espaldilla de bovino]]></kwd>
<kwd lng="es"><![CDATA[Fuerza de corte Warner-Bratzler]]></kwd>
<kwd lng="es"><![CDATA[Machos jóvenes sin castrar]]></kwd>
</kwd-group>
</article-meta>
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