<?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>2007-3380</journal-id>
<journal-title><![CDATA[Revista bio ciencias]]></journal-title>
<abbrev-journal-title><![CDATA[Revista bio ciencias]]></abbrev-journal-title>
<issn>2007-3380</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Nayarit]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-33802023000100400</article-id>
<article-id pub-id-type="doi">10.15741/revbio.10.e1348</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Antioxidant and antibacterial effect of different extracts from Tithonia tubaeformis.]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto antioxidante y antibacteriano de diferentes extractos de Tithonia tubaeformis.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Vázquez]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ocampo-López]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ayala-Martínez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Aco]]></surname>
<given-names><![CDATA[R. S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zaragoza-Bastida]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zepeda-Bastida]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Instituto de Ciencias Agropecuarias Área Académica de Medicina Veterinaria y Zootecnia]]></institution>
<addr-line><![CDATA[Tulancingo Hidalgo]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>10</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33802023000100400&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33802023000100400&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33802023000100400&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The genus Tithonia has been extensively studied to determine its bioactive effects of pharmaceutical and nutritional interest; therefore, this study aimed to determine the antioxidant and antibacterial effect of five extracts of Tithonia tubaeformis, obtained with ascending polarity solvents, hexane, dichloromethane, ethyl acetate, methanol, and ethanol. In addition, tannins, alkaloids, and total phenols were identified. The antioxidant effect of ABTS, DPPH radicals, and ferric ion reducing power was measured, and the Minimum Inhibitory Concentration of each extract was determined on Escherichia coli, Salmonella typhimurium, Salmonella enteritidis, and Listeria monocytogenes. The results showed that the five extracts have antioxidant effects on ABTS, DPPH radicals, and ferric ion-reducing potential; however, methanol and ethanol had a statistically significant effect (p &lt; 0.05). In addition, methanol, ethanol, and ethyl acetate extracts showed antimicrobial activity; ethanol solvent was the best, with a Minimum Inhibitory Concentration of 1 mg/mL on Escherichia coli and 3 mg/mL on Salmonella typhimurium, Salmonella enteritidis, Escherichia coli, and Listeria monocytogenes respectively. These results suggest that Tithonia tubaeformis may be of pharmaceutical and nutritional interest due to the bioactive effects of phytochemicals in its extracts.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El género Tithonia, ha sido ampliamente estudiado para determinar sus efectos bioactivos de interés farmacéutico y nutricional, por lo tanto, el objetivo del presente estudio fue determinar el efecto antioxidante y antibacterial de cinco extractos de Tithonia tubaeformis, obtenidos con solventes de polaridad ascendente, hexano, diclorometano, acetato de etilo, metanol y etanol. Se identificó la presencia de taninos, alcaloides y fenoles totales. Se midió el efecto antioxidante a los radicales ABTS, DPPH y poder reductor al ion férrico, se determinó la Concentración Mínima Inhibitoria de cada extracto sobre Escherichia coli, Salmonella typhimurium, Salmonella enteritidis y Listeria monocytogenes. Los resultados obtenidos mostraron que los cinco extractos tienen efecto antioxidante sobre los radicales ABTS, DPPH y potencial reductor al ion férrico; sin embargo, los extractos que presentaron un efecto estadísticamente significativo (p &lt; 0.05) fueron metanol y etanol. Los extractos de metanol, etanol y acetato de etilo mostraron actividad antimicrobiana, siendo el solvente de etanol el que mayor actividad antibacterial tuvo, con una Concentración Mínima Inhibitoria de 1 mg/mL sobre Escherichia coli y 3 mg/mL sobre Salmonella typhimurium, Salmonella enteritidis, Escherichia coli y Listeria monocytogenes. Estos resultados sugieren que Tithonia tubaeformis puede ser de interés farmacéutico y nutricional por los efectos bioactivos de los fitoquímicos presentes en sus extractos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[DPPH]]></kwd>
<kwd lng="en"><![CDATA[Ferric ion]]></kwd>
<kwd lng="en"><![CDATA[Pathogenic bacteria]]></kwd>
<kwd lng="es"><![CDATA[ABTS]]></kwd>
<kwd lng="es"><![CDATA[DPPH]]></kwd>
<kwd lng="es"><![CDATA[Ion férrico]]></kwd>
<kwd lng="es"><![CDATA[bacterias patógenas]]></kwd>
</kwd-group>
</article-meta>
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