<?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>S1405-888X2019000100123</article-id>
<article-id pub-id-type="doi">10.22201/fesz.23958723e.2019.0.192</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Toxicidad aguda del herbicida N-(fosfonometil) glicina sobre representantes planctónicos Artemia franciscana y Microcystis aeruginosa]]></article-title>
<article-title xml:lang="en"><![CDATA[Acute toxicity of N-(phosphonomethyl) glycine herbicide on planktonic microorganisms Artemia franciscana and Microcystis aeruginosa]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solís-González]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cortés-Téllez]]></surname>
<given-names><![CDATA[Alondra A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Téllez-Pérez]]></surname>
<given-names><![CDATA[Zaida Irazú]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bartolomé-Camacho]]></surname>
<given-names><![CDATA[María Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Químico-Farmacobiología ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>22</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-888X2019000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-888X2019000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-888X2019000100123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En los ecosistemas acuáticos se producen alteraciones cuando de forma continua están expuestos al N-(fosfonometil) glicina (glifosato), especies susceptibles a un determinado grado de concentración y tiempo de exposición a este compuesto químico. El objetivo del trabajo fue evaluar la concentración letal media (CL50(24)) en Artemia franciscana, así como la concentración inhibitoria media poblacional (CI50) y el coeficiente de forma (CF) en la cianobacteria Microcystis aeruginosa en ecosistemas acuáticos. Los resultados para A. franciscana fueron de una CL50(24) 0.31 mg L-1; y sobre M. aeruginosa de una CI50(72) 53.95 mg L-1. En cuanto al estudio del coeficiente de forma, en las células control de M. aeruginosa resultó en un CF&#8776;1, mientras que expuestas a 72h-NOEC (Concentración sin Efecto Observable) fue de 2.95 mg L-1. La CI50(72) fue de 53.95 mg L-1 indicando que las células se mantienen esféricas, sin embargo, hay cambios significativos en su volumen y superficie celular en la CI50(72) de 7.69 ± 1.69 µm3 con un 33% en reducción de volumen comparada con la célula control, lo que refleja los peligros ecotoxicológicos de este herbicida. La exposición al glifosato resultó de categoría I (altamente tóxica) en A. franciscana y categoría II (tóxica) en M. aeruginosa, de acuerdo con la clasificación de la Agencia de Protección Ambiental de los Estados Unidos (U.S. EPA).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Continuous exposure to N-(phosphonomethyl) glycine (glyphosate) produces alterations on aquatic ecosystems, depending on the species or organism, concentration and exposure time. The aim of this research was to evaluate the median lethal concentration (LC50(24)) in Artemia franciscana, as well as the median population inhibitory concentration (IC50) and the coefficient of form (CF) in the cyanobacterium Microcystis aeruginosa in aquatic ecosystems. The results for A. franciscana were an LC50(24) 0.31 mg L-1, and on M. aeruginosa of an IC50(72) 53.95 mg L-1. About the study of the coefficient of form, in the control cells of M. aeruginosa it resulted in a CF&#8776;1, while exposed to 72h-NOEC (No Observable Effect Concentration) was 2.95 mg L-1. The IC50(72) was 53.95 mg L-1 indicating that the cells remain spherical, however, there are significant changes in their volume and the cell surface exposed to IC50(72) of 7.69 ± 1.69 µm3 with 33% volume reduction compared to the control cell, which reflects the ecotoxicological dangers of this herbicide. Exposure to glyphosate resulted as category I (highly toxic) in A. franciscana and category II (toxic) in M. aeruginosa, according to the classification of the United States Environmental Protection Agency (U.S. EPA).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[glifosato]]></kwd>
<kwd lng="es"><![CDATA[toxicidad aguda]]></kwd>
<kwd lng="es"><![CDATA[Artemia franciscana]]></kwd>
<kwd lng="es"><![CDATA[Microcystis aeruginosa]]></kwd>
<kwd lng="es"><![CDATA[coeficiente de forma]]></kwd>
<kwd lng="en"><![CDATA[glyphosate]]></kwd>
<kwd lng="en"><![CDATA[acute toxicity]]></kwd>
<kwd lng="en"><![CDATA[Artemia franciscana]]></kwd>
<kwd lng="en"><![CDATA[Microcystis aeruginosa]]></kwd>
<kwd lng="en"><![CDATA[form coefficient]]></kwd>
</kwd-group>
</article-meta>
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