<?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>0034-7418</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Químico - Farmacéuticas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. cienc. quim. farm.]]></abbrev-journal-title>
<issn>0034-7418</issn>
<publisher>
<publisher-name><![CDATA[Departamento de Farmácia, Facultad de Ciencias, Universidade Nacional da Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74182019000200425</article-id>
<article-id pub-id-type="doi">10.15446/rcciquifa.v48n2.82720</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de la actividad antioxidante en extractos hidroalcohólicos de Portulaca oleracea L.]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of the antioxidant activity in hydroalcoholic extracts of Portulaca oleracea L.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gruszycki]]></surname>
<given-names><![CDATA[Mabel Rosalía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valenzuela]]></surname>
<given-names><![CDATA[Gabriela Malena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Báez]]></surname>
<given-names><![CDATA[Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leguiza]]></surname>
<given-names><![CDATA[Pedro Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gruszycki]]></surname>
<given-names><![CDATA[Ana Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alba]]></surname>
<given-names><![CDATA[Daniel Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional del Chaco  ]]></institution>
<addr-line><![CDATA[Chaco ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2019</year>
</pub-date>
<volume>48</volume>
<numero>2</numero>
<fpage>425</fpage>
<lpage>435</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74182019000200425&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74182019000200425&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74182019000200425&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de este trabajo fue evaluar la actividad antioxidante en extractos hidroal-cohólicos de las partes aéreas de Portulaca oleracea L. Se obtuvieron extractos utilizando como solventes metanol (MeOH) y etanol (EtOH). Los fenoles totales y los flavonoides se cuantificaron con el método de Folin-Ciocalteu y el de complejación de aluminio. Para determinar la actividad antioxidante de los extractos se utilizó y mediante la metodología ABTS&#8226;+ (ácido 2,2'-azino-bis(3-etilbenzotiazolin)-6-sulfónico). El extracto metanólico presentó mayor capacidad antioxidante frente a los radicales DPPH&#8226; y ABTS&#8226;+, así como un mayor contenido de fenoles totales y flavonoides, en comparación con el extracto etanólico. Estos resultados demuestran que las partes aéreas de P. oleracea presentan actividad antioxidante.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY The aim of this study was to evaluate the antioxidant activity in hydroalcoholic extracts of the aerial parts of Portulaca oleracea L. Extracts were obtained using methanol and ethanol as solvents. Total phenols and flavonoids were quantified using the Folin-Ciocalteu method and the aluminum complexation reaction. The antioxidant activity of the extracts was screened using the DPPH&#8226; (2,2-diphenyl-1-picrylhydracil) radical scavenging method and the ABTS&#8226;+ (2,2'-azino-bis(3-ethylbenzothiazolin)-6-sulfonic acid) assay. The methanolic extract showed a greater antioxidant capacity against DPPH&#8226; and ABTS&#8226;+, as well as a higher content of total phenols and flavo-noid, in comparison to the ethanolic extract. These results suggest that the aerial parts of P. oleracea exhibit antioxidant activity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Portulaca oleracea]]></kwd>
<kwd lng="es"><![CDATA[verdolaga]]></kwd>
<kwd lng="es"><![CDATA[polifenoles]]></kwd>
<kwd lng="es"><![CDATA[antioxidantes]]></kwd>
<kwd lng="en"><![CDATA[Portulaca oleracea]]></kwd>
<kwd lng="en"><![CDATA[purslane]]></kwd>
<kwd lng="en"><![CDATA[polyphenols]]></kwd>
<kwd lng="en"><![CDATA[antioxidants]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhou]]></surname>
<given-names><![CDATA[Y.X.]]></given-names>
</name>
<name>
<surname><![CDATA[Xin]]></surname>
<given-names><![CDATA[H.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Rahman]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[S.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Peng]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Portulaca oleracea L.: A review of phytochemistry and pharmacological effects]]></article-title>
<source><![CDATA[Biomed. Res. Int]]></source>
<year>2015</year>
<volume>925631</volume>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alam]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Juraimi]]></surname>
<given-names><![CDATA[A.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Rafii]]></surname>
<given-names><![CDATA[M.Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Abdul-Hamid]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Aslani]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Hasan]]></surname>
<given-names><![CDATA[M.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mohd-Zainudin]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Uddin]]></surname>
<given-names><![CDATA[M.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of antioxidant compounds, antioxidant activities, and mineral composition of 13 collected purslane (Portulaca oleracea L.) accessions]]></article-title>
<source><![CDATA[Biomed. Res. Int]]></source>
<year>2014</year>
<volume>296063</volume>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sarmiento-Franco]]></surname>
<given-names><![CDATA[L.A]]></given-names>
</name>
<name>
<surname><![CDATA[Barrera-Ramos]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Carrasco-Espinoza]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Bautista-Ortega]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Portulaca oleracea, Un recurso vegetal versátil en espera de ser aprovechado en el trópico]]></article-title>
<source><![CDATA[Agroproductividad]]></source>
<year>2014</year>
<volume>9</volume>
<numero>61</numero>
<issue>61</issue>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rahimi]]></surname>
<given-names><![CDATA[V.B]]></given-names>
</name>
<name>
<surname><![CDATA[Ajam]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Rakhshandeh]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Askari]]></surname>
<given-names><![CDATA[V.R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A pharmacological review on Portulaca oleracea L.: Focusing on anti-inflammatory, anti-oxidant, immunomodulatory and antitumor activities]]></article-title>
<source><![CDATA[J. Pharmacopuncture]]></source>
<year>2019</year>
<volume>22</volume>
<numero>7</numero>
<issue>7</issue>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marzocca]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Vademécum de malezas medicinales de la Argentina: indígenas y exóticas]]></source>
<year>1997</year>
<page-range>300</page-range><publisher-loc><![CDATA[Buenos Aires ]]></publisher-loc>
<publisher-name><![CDATA[Orientación Gráfica Editora S.R.L.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Uddin]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Juraimi]]></surname>
<given-names><![CDATA[A.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Ali]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Ismail]]></surname>
<given-names><![CDATA[M.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of antioxidant properties and mineral composition of purslane (Portulaca oleracea L.) at different growth stages]]></article-title>
<source><![CDATA[Int. J. Mol. Sci]]></source>
<year>2012</year>
<volume>13</volume>
<numero>10257</numero>
<issue>10257</issue>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rondina]]></surname>
<given-names><![CDATA[R.V.D.]]></given-names>
</name>
<name>
<surname><![CDATA[Coussio]]></surname>
<given-names><![CDATA[J.D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio fitoquímico de plantas medicinales argentinas]]></article-title>
<source><![CDATA[Rev. Invest. Agrop]]></source>
<year>1969</year>
<volume>6</volume>
<numero>351</numero>
<issue>351</issue>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singleton]]></surname>
<given-names><![CDATA[V.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Orthofer]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Lamuela-Raventós]]></surname>
<given-names><![CDATA[R.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of total phenols and other oxidation substrates and antioxidants by means of Folin-Ciocalteu reagent]]></article-title>
<source><![CDATA[Meth. Enzymol]]></source>
<year>1999</year>
<volume>299</volume>
<numero>152</numero>
<issue>152</issue>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Popova]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Bankova]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Butovska]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Petkov]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Nikolova-Damyanova]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Sabatini]]></surname>
<given-names><![CDATA[A.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Marcazzan]]></surname>
<given-names><![CDATA[G.L]]></given-names>
</name>
<name>
<surname><![CDATA[Bogdanov]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Validated methods for the quantification of biologically active constituents of poplar-type propolis]]></article-title>
<source><![CDATA[Phytochem. Anal]]></source>
<year>2004</year>
<volume>15</volume>
<numero>235</numero>
<issue>235</issue>
</nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brand-Williams]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Cuvelier]]></surname>
<given-names><![CDATA[M.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Berset]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Use of a free radical method to evaluate antioxidant activity]]></article-title>
<source><![CDATA[LWT Food Sci. Technol]]></source>
<year>1995</year>
<volume>28</volume>
<numero>25</numero>
<issue>25</issue>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Re]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Pellegrini]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Proteggente]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pannala]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rice-Evans]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Anti-oxidant activity applying an improved ABTS radical cation decolorization assay]]></article-title>
<source><![CDATA[Free Radic. Biol. Med]]></source>
<year>1999</year>
<volume>26</volume>
<numero>1231</numero>
<issue>1231</issue>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kuskoski]]></surname>
<given-names><![CDATA[E.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Asuero]]></surname>
<given-names><![CDATA[A.G.]]></given-names>
</name>
<name>
<surname><![CDATA[García-Parilla]]></surname>
<given-names><![CDATA[M.C]]></given-names>
</name>
<name>
<surname><![CDATA[Troncoso]]></surname>
<given-names><![CDATA[A.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fett]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Actividad antioxidante de pigmentos antociánicos]]></article-title>
<source><![CDATA[J. Food Sci. Technol]]></source>
<year>2004</year>
<volume>24</volume>
<numero>691</numero>
<issue>691</issue>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guzmán-Heras]]></surname>
<given-names><![CDATA[L.E.]]></given-names>
</name>
<name>
<surname><![CDATA[García-Mir]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Cuesta-Rubio]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Jaramillo-Jaramillo]]></surname>
<given-names><![CDATA[C.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Japón]]></surname>
<given-names><![CDATA[G.E.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Composición química y actividad antiinflamatoria de extracto de partes aéreas de Portulaca oleracea (verdolaga)]]></article-title>
<source><![CDATA[Rev. Cubana Farm]]></source>
<year>2017</year>
<volume>51</volume>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lim]]></surname>
<given-names><![CDATA[Y.Y]]></given-names>
</name>
<name>
<surname><![CDATA[Quah]]></surname>
<given-names><![CDATA[E.P.L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Antioxidant properties of different cultivars of Portulaca oleracea]]></article-title>
<source><![CDATA[Food Chem]]></source>
<year>2007</year>
<volume>103</volume>
<numero>734</numero>
<issue>734</issue>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santiago-Sáenz]]></surname>
<given-names><![CDATA[Y.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Monroy-Torres]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Cariño-Cortés]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Fuentes]]></surname>
<given-names><![CDATA[A.D.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez-Alvarado]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización fisicoquímica y propiedades antioxidantes de verdolaga (Portulaca oleracea) de alto consumo en el estado de Hidalgo, México]]></article-title>
<source><![CDATA[Investigación y Desarrollo en Ciencia y Tecnología de Alimentos]]></source>
<year>2018</year>
<volume>3</volume>
<numero>210</numero>
<issue>210</issue>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gevrenova]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Zheleva-Dimitrova]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Balabanova]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Lazarova]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Ruseva]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Lozanov]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A phytochemical study and antioxidant potential of Portulaca oleracea L. (Purslane) grown wild in Bulgaria and Greece]]></article-title>
<source><![CDATA[C. R. Acad. Bulg. Sci]]></source>
<year>2016</year>
<volume>69</volume>
<numero>865</numero>
<issue>865</issue>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
