<?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>0250-5460</journal-id>
<journal-title><![CDATA[Revista Boliviana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Bol. Quim]]></abbrev-journal-title>
<issn>0250-5460</issn>
<publisher>
<publisher-name><![CDATA[Universidad Mayor de San Andrés]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0250-54602023000500021</article-id>
<article-id pub-id-type="doi">10.34098/2078-3949.40.5.3</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Interaction of DL-histidine, DL-threonine and DL-valine with platinum and tungsten ferrocyanides]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tewari]]></surname>
<given-names><![CDATA[Brij B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Usmanali]]></surname>
<given-names><![CDATA[Dropadi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,aff1  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>40</volume>
<numero>5</numero>
<fpage>21</fpage>
<lpage>28</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S0250-54602023000500021&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S0250-54602023000500021&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S0250-54602023000500021&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Interaction of DL-histidine, DL-threonine and DL-valine with platinum and tungsten ferrocyanides.Adsorptive interaction of DL-histidine, DL-threonine, and DL-valine on platinum and tungsten ferrocyanides were studied at pH range 1.0 - 10.0 and room temperature (30± 1°C). The progress of interaction was followed spectrophotometrically by measuring the absorbance of amino acids solutions at their corresponding &#955;max. At neutral pH DL-valine and DL-histidine was found to show maximum and minimum adsorption, respectively on both metal ferrocyanides studied. The Langmuir type of adsorption is followed in the concentration range 10-3 to 10-4 M of DL-histidine, DL-threonine, and DL-valine solutions. Present studies suggest the importance of double metal ferrocyanides in the stabilization of biomolecules from degradation on primitive Earth.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Interacción de DL-histidina, DL-treonina y DL-valina con ferrocianuros de platino y tungsteno. La interacción de adsorción de DL-histidina, DL-treonina y DL-valina en ferrocianuros de platino y tungsteno se estudió en un rango de pH de 1,0 a 10,0 y a temperatura ambiente (30 ± 1°C). El progreso de la interacción se siguió espectrofotométricamente midiendo la absorbancia de las soluciones de aminoácidos en su correspondiente &#955;max. A pH neutro, se encontró que la DL-valina y la DL-histidina mostraban una adsorción máxima y mínima, respectivamente, en ambos ferrocianuros metálicos estudiados. El tipo de adsorción de Langmuir se sigue en el rango de concentración de 10-3 a 10-4 M de soluciones de DL-histidina, DL-treonina y DL-valina. Los estudios actuales sugieren la importancia de los ferrocianuros de doble metal en la estabilización de biomoléculas de la degradación en la Tierra primitiva.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[DL-Histidine]]></kwd>
<kwd lng="en"><![CDATA[DL-Threonine]]></kwd>
<kwd lng="en"><![CDATA[DL-Valine]]></kwd>
<kwd lng="en"><![CDATA[Metal ferrocyanides]]></kwd>
<kwd lng="en"><![CDATA[Adsorptive interaction]]></kwd>
<kwd lng="en"><![CDATA[Chemical evolution]]></kwd>
<kwd lng="en"><![CDATA[Origins of life]]></kwd>
<kwd lng="es"><![CDATA[DL-Histidina]]></kwd>
<kwd lng="es"><![CDATA[DL-Treonina]]></kwd>
<kwd lng="es"><![CDATA[DL-Valina]]></kwd>
<kwd lng="es"><![CDATA[Ferrocianuros metálicos]]></kwd>
<kwd lng="es"><![CDATA[Interacción de adsorción]]></kwd>
<kwd lng="es"><![CDATA[Evolución química]]></kwd>
<kwd lng="es"><![CDATA[Orígenes de la vida]]></kwd>
</kwd-group>
</article-meta>
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