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</topic><topic id="https://vocabulario.abcd.usp.br/pt-br/?tema=52688"><instanceOf><topicRef xlink:href="#term"/></instanceOf><baseName><baseNameString>INDICADORES E REAGENTES</baseNameString></baseName>  <occurrence>    <instanceOf>      <topicRef xlink:href="#scope-note"/>    </instanceOf><baseName><baseNameString><![CDATA[ Substâncias usadas para detecção, identificação, análise, etc. de processos ou condições químicas, biológicas ou patológicas. Indicadores são substâncias que mudam sua aparência física (p.ex., cor) no ponto final de uma titulação química (ou dele se aproximando), p.ex., na passagem entre a acidez e a alcalinidade. Reagentes são substâncias usadas para detecção ou determinação (especialmente análise) de outra substância por meios químicos ou microscópicos. Os tipos de reagentes são precipitantes, solventes, oxidantes, redutores, fluxos, e reagentes colorimétricos.<p>Fonte: DeCS. Disponível em: https://decs.bvsalud.org<p> ]]></baseNameString></baseName>  </occurrence></topic>  <association>    <instanceOf>      <topicRef xlink:href="#broader-narrower"/>    </instanceOf>    <member>      <roleSpec>  <topicRef xlink:href="#narrower"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=52688"/>    </member>    <member>      <roleSpec>  <topicRef xlink:href="#broader"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=82898"/>    </member>  </association></topicMap>