<?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>2617-4731</journal-id>
<journal-title><![CDATA[Revista de la Sociedad Científica del Paraguay]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Soc. cient. Parag.]]></abbrev-journal-title>
<issn>2617-4731</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Científica del Paraguay]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2617-47312018000200251</article-id>
<article-id pub-id-type="doi">10.32480/rscp.2018-23-2.251-262</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sedimentos de fondo en los arroyos Tapiracuai y Cuarepotí]]></article-title>
<article-title xml:lang="en"><![CDATA[Bottom sediments from Tapiracuai and Cuarepotí Brooks]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[Franklin D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[Mirna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Facetti-Masulli]]></surname>
<given-names><![CDATA[Juan F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hydroconsult SRL  ]]></institution>
<addr-line><![CDATA[Asunción ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Asunción Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[San Lorenzo ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>23</volume>
<numero>2</numero>
<fpage>251</fpage>
<lpage>262</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2617-47312018000200251&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2617-47312018000200251&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2617-47312018000200251&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los sedimentos de fondo de los cuerpos de agua constituyen un reservorio para los cationes metálicos, moléculas y otros productos que a lo largo de lapsos, cortos o largos, pueden constituirse en contaminantes, con efectos deletéreos para la biota; el conocimiento de su contenido es pues muy importante. En este trabajo se investigan en los sedimentos de los arroyos Tapiracuai y Cuarepoti los tenores de elementos de la serie 3d que por la presencia/acción de electrones desapareados pueden originar reacciones de radicales libres, así como otros tales como el Cd y el Pb de conocida toxicidad. Los valores registrados son más bien bajos. En el examen de sus posibles efectos indeseables, se utilizan con fines de comparación y análisis, los diagramas multielementales (aracnogramas) referidos a los valores recomendados para la corteza superior así como a los valores guías de calidad de sedimentos. Los mismos indican la actual ausencia de riesgo potencial debido a tales elementos; señalan así mismo su utilidad para inferir expeditivamente, la existencia de niveles de efectos indeseables para la biota.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Bottom sediments of water bodies constitute a reservoir for metal cations, molecules and other products that, over a short or long period of time, can become pollutants, with deleterious effects for the biota; the knowledge of its content is therefore very important. In this work, in the sediments of Tapiracuai and Cuarepoti Brooks are investigated elements of the 3d seriesthat bythe presence / action of unpaired electrons can originate reactions of free radicals, as well as others such as Cd and Pb of known toxicity. Their registered values are rather low. In consideration of possible adverse effects were used for comparison and analysis, multielement diagrams (aracnogramas) referred to the recommended values for the upper crust as well as sediments quality guidelines values. They indicate the current lack of potential risk due to such elements; they also show its usefulness to infer expeditiously, the existence of levels of undesirable effects for the biota.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sedimentos de fondo]]></kwd>
<kwd lng="es"><![CDATA[Tapiracuai]]></kwd>
<kwd lng="es"><![CDATA[Cuarepoti]]></kwd>
<kwd lng="es"><![CDATA[contaminantes]]></kwd>
<kwd lng="es"><![CDATA[serie 3d]]></kwd>
<kwd lng="es"><![CDATA[Corteza superior]]></kwd>
<kwd lng="es"><![CDATA[valores de referencia en sedimentos]]></kwd>
<kwd lng="en"><![CDATA[Bottom sediments]]></kwd>
<kwd lng="en"><![CDATA[Tapiracuai]]></kwd>
<kwd lng="en"><![CDATA[Cuarepoti]]></kwd>
<kwd lng="en"><![CDATA[pollutants]]></kwd>
<kwd lng="en"><![CDATA[3d series]]></kwd>
<kwd lng="en"><![CDATA[Upper Crust]]></kwd>
<kwd lng="en"><![CDATA[sediments referencevalues]]></kwd>
</kwd-group>
</article-meta>
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