<?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>1405-888X</journal-id>
<journal-title><![CDATA[TIP. Revista especializada en ciencias químico-biológicas]]></journal-title>
<abbrev-journal-title><![CDATA[TIP]]></abbrev-journal-title>
<issn>1405-888X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Estudios Superiores Zaragoza]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-888X2020000100102</article-id>
<article-id pub-id-type="doi">10.22201/fesz.23958723e.2020.0.233</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización e identificación de compuestos bioactivos con actividad antioxidante de la cáscara, pulpa y semilla del fruto de tejocote (Crataegus mexicana)]]></article-title>
<article-title xml:lang="en"><![CDATA[Characterization and identification of bioactive compounds with antioxidant activity from peel, pulp and seed of tejocote fruit (Crataegus mexicana)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Robles-Botero]]></surname>
<given-names><![CDATA[M. Viviana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ronquillo-de Jesús]]></surname>
<given-names><![CDATA[Elba]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quiroz-Reyes]]></surname>
<given-names><![CDATA[Cinthya N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Méndez]]></surname>
<given-names><![CDATA[Miguel A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Politécnica de Francisco I. Madero Dirección de Ingeniería Agroindustrial ]]></institution>
<addr-line><![CDATA[Tepatepec Hidalgo]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>23</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-888X2020000100102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-888X2020000100102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-888X2020000100102&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El tejocote (Crataegus mexicana) es una planta nativa de México. Su fruto no sólo es utilizado como alimento para el consumo humano, sino también como ornamento en celebraciones y en la medicina tradicional. A pesar de esto, se le considera un cultivo subutilizado y su aporte de compuestos con actividad antioxidante ha sido poco estudiado. El objetivo de este trabajo fue caracterizar e identificar metabolitos secundarios extraídos de las fracciones del fruto para determinar su potencial antioxidante: (1) cáscara, (2) pulpa y (3) semilla. Se cuantificó el contenido de fenoles y flavonoides totales, flavan-3-ol y proantocianidinas. Además, la actividad antioxidante de las tres fracciones fue cuantificada mediante dos métodos: (1) reducción del hierro (FRAP) e (2) inhibición del radical libre 2,2-difenil-1-picrilhidracilo (DPPH). Se identificaron los principales compuestos presentes en cada una de las fracciones a través de cromatografía de líquidos de alta resolución (HPLC). Los resultados indicaron que fue en el extracto de la semilla donde se presentó el mayor contenido de fenoles y flavonoides totales, así como el mejor potencial antioxidante, el cual estuvo directamente relacionado con el contenido de compuestos extraídos. En las tres fracciones del fruto se registró la presencia de epicatequina, quercetina 3-D-galactósido y ácido ascórbico. Además, en semilla se identificó la catequina y vitexina, mientras que en cáscara y pulpa se observó la presencia de ácido clorogénico y procianidina B2.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Tejocote (Crataegus mexicana) is a native plant from Mexico. Its fruit is not only used as food for human consumption but also as an ornament in celebrations and traditional medicine. Despite this, it is considered an underutilized crop, and its antioxidant-containing compounds have only been minimally studied. The objective of this work was to characterize and identify secondary metabolites extracted from three fruit fractions to determine their antioxidant potential: (1) peel, (2) pulp and (3) seed. Phenols and total flavonoid, flavan-3-ol, and proanthocyanidins contents were determined. Also, antioxidant activities of the three fractions were quantified by two methods: (1) iron reduction (FRAP) and (2) inhibition of the 2,2-diphenyl-1- picrylhydrazyl free radical (DPPH). The main compounds present in each of the fractions were identified through high-performance liquid chromatography (HPLC). The results showed that the seed extract exhibited the highest phenol and total flavonoid contents and the best antioxidant potential, which was directly related to the content of extracted compounds. The presence of epicatechin, quercetin 3-D-galactoside, and ascorbic acid was recorded in the three fractions of the fruit. In addition, catechin and vitexin were identified in seed, while in the peel and pulp the presence of chlorogenic acid and procyanidin B2 was detected.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Crataegus mexicana]]></kwd>
<kwd lng="es"><![CDATA[antioxidante]]></kwd>
<kwd lng="es"><![CDATA[polifenol]]></kwd>
<kwd lng="es"><![CDATA[extracción asistida por ultrasonido]]></kwd>
<kwd lng="en"><![CDATA[Crataegus mexicana]]></kwd>
<kwd lng="en"><![CDATA[antioxidant]]></kwd>
<kwd lng="en"><![CDATA[polyphenol]]></kwd>
<kwd lng="en"><![CDATA[ultrasound-assisted extraction]]></kwd>
</kwd-group>
</article-meta>
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