<?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>2221-2450</journal-id>
<journal-title><![CDATA[Revista CENIC Ciencias Biológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. CENIC Cienc. Biol]]></abbrev-journal-title>
<issn>2221-2450</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Investigaciones Científicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2221-24502022000300243</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[EVALUACION DE DIFERENTES EXTRACTOS DE PROPOLEOS]]></article-title>
<article-title xml:lang="en"><![CDATA[EVALUATION OF DIFFERENT EXTRACTS OF PROPOLIS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guanche Gallardo]]></surname>
<given-names><![CDATA[Dailen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigaciones Apícolas (CIAPI)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>53</volume>
<numero>3</numero>
<fpage>243</fpage>
<lpage>251</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2221-24502022000300243&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2221-24502022000300243&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2221-24502022000300243&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El propóleos es una sustancia compleja producida por las abejas. Presenta amplio uso en la medicina tradicional y como suplemento nutricional. Estas se basan entre otros, en sus propiedades antioxidantes y antimicrobianas. El extracto etanólico ha sido muy bien estudiado y comúnmente empleado debido a que las sustancias biológicamente activas del propóleos son fácilmente solubles en etanol; sin embargo, presenta desventajas como la intolerancia de algunas personas al alcohol y su fuerte sabor que dificultan su empleo. Por su parte, el extracto acuoso de propóleos es capaz de superar estas dificultades, a la vez que ha mostrado actividades antioxidantes y antibacterianas. El objetivo de este estudio fue comparar los extractos acuosos obtenidos mediante diferentes procedimientos de extracción, con el extracto hidroalcohólico tradicional, evaluando los contenidos de materia seca, fenoles totales, flavonoides totales, actividad antioxidante y antibacteriana de los mismos. También se realizó la cromatografía en capa delgada para el análisis cualitativo del contenido de los mismos. Los resultados mostraron que los extractos acuosos analizados tuvieron diferencias en la concentración de compuestos extraídos. Por otro lado, las propiedades antioxidantes no se relacionaron con el contenido fenólico o flavonoico. Mientras, la propiedad antibacteriana sí presentó relación con el contenido de fenoles. Los extractos obtenidos con mezclas hidroalcohólicas y redisueltos en agua presentaron los mayores valores de materia seca, flavonoides y fenoles totales, así como actividad antibacteriana. Estos son por tanto lo extractos que Tienen un mayor potencial de acción terapéutica para su uso en la clínica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Propolis is a complex substance produced by bees. It is widely used in traditional medicine and as a nutritional supplement. These are based, among others, on its antioxidant and antibacterial properties. The ethanolic extract has been very well studied and usually used because the biologically active substances of propolis are easily soluble in ethanol; however, it has disadvantages as the intolerance of some people to alcohol and its strong taste that make it difficult to used. On the other hand, the aqueous extract of propolis it is able to overcome these difficulties while it has shown antioxidant and antibacterial activities. The aim of this study was to compare the aqueous extract obtained through different extraction procedures. The content of dry matter, total phenols, total flavonoids and antioxidant and antibacterial activity were evaluated. An analysis by thin layer chromatography was conducted too. The results showed that the aqueous extracts analyzed had differences in the concentration of extracted compounds. On the other hand, the antioxidant properties were not related to the phenolic or flavonoic content. Meanwhile, the antibacterial property did show a relationship with the phenol content. The extracts obtained with hydroalcoholic mixtures and redissolved in water, presented the highest values &#8203;&#8203;of dry matter, total flavonoids and phenols, as well as antibacterial activity. They have potential therapeutic action for use in the clinic.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[propóleos]]></kwd>
<kwd lng="es"><![CDATA[fenoles]]></kwd>
<kwd lng="es"><![CDATA[actividad antibacteriana y antioxidante]]></kwd>
<kwd lng="en"><![CDATA[propolis]]></kwd>
<kwd lng="en"><![CDATA[phenols]]></kwd>
<kwd lng="en"><![CDATA[antibacterial and antioxidant activity]]></kwd>
</kwd-group>
</article-meta>
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