<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972016000200233</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Preliminary data of antioxidant activity of green seaweeds (Ulvophyceae) from the Southwestern Atlantic and Antarctic Maritime islands]]></article-title>
<article-title xml:lang="es"><![CDATA[Datos preliminares de la actividad antioxidante de algas verdes (Ulvophyceae) del Antlántico del Sur y de las islas marítimas de Antártida]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bernardi]]></surname>
<given-names><![CDATA[Juliane]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vasconcelos]]></surname>
<given-names><![CDATA[Edson R. T. P. P. de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lhullier]]></surname>
<given-names><![CDATA[Cintia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gerber]]></surname>
<given-names><![CDATA[Thaise]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Neto]]></surname>
<given-names><![CDATA[Pio Colepicolo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pellizzari]]></surname>
<given-names><![CDATA[Franciane M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Pernambuco Departamento de Oceanografia Laboratório de Macroalgas]]></institution>
<addr-line><![CDATA[Recife PE]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de Santa Catarina Departamento de Ciências Farmacêuticas Laboratório de Química Farmacêutica]]></institution>
<addr-line><![CDATA[Florianópolis SC]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Federal de Santa Catarina Departamento de Botânica ]]></institution>
<addr-line><![CDATA[Florianópolis SC]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade de São Paulo Instituto de Química Departamento de Bioquímica]]></institution>
<addr-line><![CDATA[São Paulo SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidade Estadual do Paraná  ]]></institution>
<addr-line><![CDATA[Paranaguá ]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<volume>26</volume>
<numero>2</numero>
<fpage>233</fpage>
<lpage>239</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972016000200233&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972016000200233&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972016000200233&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  Seaweeds must survive in highly competitive environments and thus develop defense strategies that may produce highly diversified antioxidant compounds.  Goals:  The main objective of this work was to assess the antioxidant activity of green seaweeds.  Methods:  Six species of ulvophycean chlorophytes were collected during spring/summer, between the Antarctic (Monostroma hariotii, Protomonostroma rosulatum and Ulva hookeriana - formerly as U. bulbosa) and the southwestern Atlantic Ocean (Gayralia brasiliensis, Protomonostroma undulatum and Ulva fasciata). They were then tested for their antioxidant activities using the 2.2-diphenyl-picrylhydrazyl (DPPH) radical scavenging method and by quantification of their phenolic (expressed as gallic acid equivalent - GAE - and carotenoid contents.  Results:  Among the evaluated species, P. rosulatum and U. hookeriana showed high antioxidant potential (77.9±2.8 and 53.1±15.0%, respectively) and high phenolic content (176±6.0 and 144.7±8.9 µg GAE g-1, respectively). These species were collected on King George Island (South Shetland archipelago, around the Antarctic Peninsula) and their higher antioxidant potential may be associated with adaptation to the high incidence of UV rays in this region during summer. In general, tested seaweeds, mainly the samples collected in the Antarctic and Chilean Patagonia, showed higher values of phenolic (from 58.3±2.0 to 144.7±8.9 µg GAE g-1) and carote noid contents (from 23.4±0.2 to 51.5±0.1 µg &#946;-carotene g-1).  Conclusions:  The presence and levels of these compounds suggest that the target seaweeds may have high antioxidant potential. Also the antioxidant activity could be associated with the occurrence area of the species instead of the order or taxonomic group to which they belong.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  Las algas marinas tienen que sobrevivir en entornos altamente competitivos, lo que hace que desarrollan estrategias de defensa que pueden dar lugar a una gran diversidad de compuestos antioxidantes.  Objetivos:  El principal objetivo de este trabajo fue evaluar la actividad antioxidante de algas verdes.  Métodos:  Seis especies de clorófitos (Ulvophyceae) recogidos durante el primavera/verano entre la Antártida (Monostroma hariotii, Protomonostroma rosulatum y Ulva hookeriana - antes como U. bulbosa) y el Atlántico Sur (Gayralia brasiliensis, Protomonostroma undulatum y Ulva fasciata) fueron probados por su actividad antioxidante usando el método de secuestro de radicales libres con 2,2-diphenil-picrylhidrazil (DPPH) y pela cuantificación de contenidos fenólicos (expreso como equivalente de ácido gálico (GAE)) y contenidos de carotenoides.  Resultados:  Entre las especies evaluadas, P. rosulatum y U. hookeriana mostraron alto potencial antioxidante (77,9±2,8 y 53,1±15%, respectivamente) y alto contenido fenólico (176±6,0 y 144,7±8,9 µg GAE g-1, respectivamente). Estas especies fueron recolectadas en la Isla Rey Jorge (cerca de la Península Antártida) y su mayor potencial antioxidante puede estar asociado con la adaptación a la alta incidencia de los rayos UV en esta región. En general, las algas marinas probadas, principalmente las muestras recogidas en la Patagonia Antártida y chilena, mostraron valores más altos de fenólico (de 58,3 ± 2,0 a 144,7 ± 8,9 mg GAE g-1) y el contenido de carotenoides (de 23,4 ± 0,2 a 51,5 ± 0,1 mg g-1 &#946;-caroteno).  Conclusiones:  La presencia y los niveles de estos compuestos sugieren que las algas marinas diana pueden tener un alto potencial antioxidante. También la actividad antioxidante podría estar asociada con el área de ocurrencia de las especies en lugar de la orden o grupo taxonómico a la que pertenecen.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Green seaweeds]]></kwd>
<kwd lng="en"><![CDATA[reactive oxygen species]]></kwd>
<kwd lng="en"><![CDATA[phenolic contents]]></kwd>
<kwd lng="en"><![CDATA[photoprotectants]]></kwd>
<kwd lng="es"><![CDATA[Algas verdes]]></kwd>
<kwd lng="es"><![CDATA[especies reactivas del oxígeno]]></kwd>
<kwd lng="es"><![CDATA[contenidos fenólicos]]></kwd>
<kwd lng="es"><![CDATA[fotoprotectores]]></kwd>
</kwd-group>
</article-meta>
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