<?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>S0034-74182017000300331</article-id>
<article-id pub-id-type="doi">10.15446/rcciquifa.v46n3.69463</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[A descrição matemática da eletrooxidação de dopamina, acompanhada por sua eletropolimerização]]></article-title>
<article-title xml:lang="en"><![CDATA[The mathematical description for the dopamine electrooxidation, accompanied by its electropolymerization]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tkach]]></surname>
<given-names><![CDATA[Volodymyr V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ivanushko]]></surname>
<given-names><![CDATA[Yana G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lukanova]]></surname>
<given-names><![CDATA[Svitlana M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romaniv]]></surname>
<given-names><![CDATA[Lyudmyla V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Oliveira]]></surname>
<given-names><![CDATA[Sílvio C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aksimentyeva]]></surname>
<given-names><![CDATA[Olena I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ojani]]></surname>
<given-names><![CDATA[Reza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yagodynets']]></surname>
<given-names><![CDATA[Petró I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Nacional de Chernivtsi  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ucrânia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de Mato Grosso do Sul  ]]></institution>
<addr-line><![CDATA[Campo Grande MS]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Nacional de Lviv Faculdade de Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ucrânia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade de Mazandarã  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>República Islâmica do Irã</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>46</volume>
<numero>3</numero>
<fpage>331</fpage>
<lpage>341</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74182017000300331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74182017000300331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74182017000300331&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Um caso interessante da eletrooxidação de dopamina, acompanhada por sua eletropolimerização, em que tanto o monômero, como o polímero condutor resultante podem ser oxidados até à respectiva forma quinônica, foi investigado do ponto de vista teórico. A análise do modelo matemático, correspondente a este sistema, mostrou que o estado estacionário, neste sistema é fácil de manter estável, apesar de a zona topológica, correspondente a esta estabilidade, ser mais estreita. Já as instabilidades oscilatória e monotônica mostraram-se mais prováveis neste caso que em sistemas semelhantes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY An interesting case for dopamine electrooxidation, in which either a monomer, or a polymer may be oxidized to the correspondent quinonic form, has been investigated from the theoretical point of view. The analysis o the correspondent mathematical model has shown that in this system the steady-state is easy to maintain stable, despite of the more narrow extension of the topological zone, correspondent to this stability. Yet the oscillatory and monotonic instabilities may be more probable in this cast, than in the similar ones.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[elétrodos quimicamente modificados]]></kwd>
<kwd lng="pt"><![CDATA[polímeros condutores]]></kwd>
<kwd lng="pt"><![CDATA[dopamina]]></kwd>
<kwd lng="pt"><![CDATA[eletropolimerização]]></kwd>
<kwd lng="pt"><![CDATA[estado estacionário estável]]></kwd>
<kwd lng="en"><![CDATA[chemically modified electrodes]]></kwd>
<kwd lng="en"><![CDATA[dopamine]]></kwd>
<kwd lng="en"><![CDATA[electropolymerization]]></kwd>
<kwd lng="en"><![CDATA[stable steady-state]]></kwd>
</kwd-group>
</article-meta>
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