<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242021000401168</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v12i4.5894</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variabilidad en el contenido de polifenoles, actividad biológica y antihelmíntica de extractos metanol:agua de las hojas de Gymnopodium floribundum Rolfe]]></article-title>
<article-title xml:lang="en"><![CDATA[Variability in polyphenol content, biological and anthelmintic activity of methanol:water extracts from the leaves of Gymnopodium floribundum Rolfe]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortíz-Ocampo]]></surname>
<given-names><![CDATA[Guadalupe Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval-Castro]]></surname>
<given-names><![CDATA[Carlos Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mancilla-Montelongo]]></surname>
<given-names><![CDATA[Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castañeda-Ramírez]]></surname>
<given-names><![CDATA[Gloria Sarahi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chan Pérez]]></surname>
<given-names><![CDATA[José Israel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Capetillo Leal]]></surname>
<given-names><![CDATA[Concepción]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Acosta]]></surname>
<given-names><![CDATA[Juan Felipe de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Yucatán Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Yucatán Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>4</numero>
<fpage>1168</fpage>
<lpage>1187</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242021000401168&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242021000401168&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242021000401168&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se determinó el efecto del mes de cosecha y edad de las hojas de Gymnopodium floribundum sobre el contenido de compuestos polifenólicos (fenoles totales (FT), taninos totales (TT) y taninos condensados (TC)) de extractos metanol:agua. Además, se determinó la actividad biológica de los polifenoles medida como la capacidad de precipitar proteína (PP), inhibir la eclosión de huevos (EH), y el desenvaine larval (IDL) de Haemonchus contortus. Se cosecharon hojas de G. floribundum en cuatro meses del año: diciembre, marzo, junio y septiembre. Se obtuvieron 24 extractos metanol:agua (70:30), 12 producidos de hojas de edad variada (EV) y 12 de hojas de 90 días (E90). Todos los extractos ocasionaron similar PP independientemente de edad y mes de cosecha. La inhibición de la EH solo fue significativa para el extracto EV de diciembre (CE50 = 374.4 &#956;g/ml; P&lt;0.05). Los extractos de hojas E90 mostraron una CE50 &gt; 1500 &#956;g/ml en diciembre, junio y septiembre. Aunque todos los extractos inhibieron el desenvaine larval (IDL), la menor CE50 fue la del extracto de hojas EV de junio (CE50 = 80.4 &#956;g/ml; P&lt;0.05). La incubación de extractos con polivinilpolipirrolidona (PVPP) limitó la IDL (P&lt;0.05), pero los polifenoles solo explicaron parte de esa actividad. En conclusión, el contenido de TC de los extractos de hojas de G. floribundum depende de su edad y mes de cosecha. Los polifenoles mostraron actividad de PP y se asociaron parcialmente con la IDL. Sin embargo, los polifenoles no explican la actividad contra huevos de H. contortus.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The effect of the harvest month and age of the leaves of Gymnopodium floribundum on the content of polyphenolic compounds (total phenols (TP), total tannins (TT) and condensed tannins (CT)) of methanol:water extracts was determined. In addition, the biological activity of polyphenols measured as the ability to precipitate protein (PP), inhibit egg hatching (EH), and larval exsheathment (LEI) of Haemonchus contortus was determined. G. floribundum leaves were harvested in 4 mo of the year: December, March, June and September. Twenty-four methanol:water extracts (70:30) were obtained, 12 produced from leaves of varied age (VA) and 12 from 90-d-old leaves (A90). All extracts caused similar PP regardless of age and harvest month. EH inhibition was only significant for December VA extract (EC50 = 374.4 &#956;g/mL; P&lt;0.05). A90 leaf extracts showed a EC50 &gt; 1,500 &#956;g/mL in December, June and September. Although all extracts inhibited larval exsheathment (LEI), the lowest EC50 was that of the VA leaf extract of June (EC50 = 80.4 &#956;g/mL; P&lt;0.05). Incubation of extracts with polyvinylpolypyrrolidone (PVPP) limited LEI (P&lt;0.05), but polyphenols only explained part of that activity. In conclusion, the CT content of G. floribundum leaf extracts depends on their age and harvest month. Polyphenols showed PP activity and were partially associated with LEI. However, polyphenols do not explain the activity against H. contortus eggs.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Polifenol]]></kwd>
<kwd lng="es"><![CDATA[Antihelmíntico]]></kwd>
<kwd lng="es"><![CDATA[Haemonchus contortus]]></kwd>
<kwd lng="es"><![CDATA[Precipitación de proteína]]></kwd>
<kwd lng="es"><![CDATA[Extractos]]></kwd>
<kwd lng="es"><![CDATA[Taninos]]></kwd>
<kwd lng="en"><![CDATA[Polyphenol]]></kwd>
<kwd lng="en"><![CDATA[Anthelmintic]]></kwd>
<kwd lng="en"><![CDATA[Haemonchus contortus]]></kwd>
<kwd lng="en"><![CDATA[Protein Precipitation]]></kwd>
<kwd lng="en"><![CDATA[Extracts]]></kwd>
<kwd lng="en"><![CDATA[Tannins]]></kwd>
</kwd-group>
</article-meta>
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