<?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>0121-4004</journal-id>
<journal-title><![CDATA[Vitae]]></journal-title>
<abbrev-journal-title><![CDATA[Vitae]]></abbrev-journal-title>
<issn>0121-4004</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Química Farmacéutica, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-40042022000200002</article-id>
<article-id pub-id-type="doi">10.17533/udea.vitae.v29n2a347446</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Propolis from native Stingless Bees: ultrasound-assisted extraction]]></article-title>
<article-title xml:lang="es"><![CDATA[Propóleos de abejas nativas sin aguijón: extracción asistida por ultrasonido]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina-Jaramillo]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvajal-Díaz]]></surname>
<given-names><![CDATA[Loren Milena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Córdoba]]></surname>
<given-names><![CDATA[Alex]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Pedagógica y Tecnológica de Colombia Facultad Seccional Duitama Escuela de Administración de Empresas Agropecuarias]]></institution>
<addr-line><![CDATA[Duitama Boyacá]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Compañía Campo Colombia S.A.S. Grupo de Investigación en Procesos Agroindustriales (AYNI) ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</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>29</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-40042022000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-40042022000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-40042022000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  BACKGROUND: Propolis has been considered a highly valuable material due to its therapeutic properties. However, in Colombia, the commercialization of propolis is limited not only by low production but also by the little knowledge about its efficient extraction. Therefore, finding an optimal and economical extraction method to obtain propolis is a necessity for beekeepers that would open new possibilities for industrial use and, therefore, for the market.  OBJECTIVES: The objective of this study was to evaluate a conventional and ultrasound-assisted extraction method, seeking to obtain the highest yield and a high amount of content of bioactive compounds in propolis extracts.  METHODS: The extraction was carried out for three crude propolis from different types of bees: Tetragonisca angustula or Angelita (ANG), Melipona eburnea or Melipona (MEL), and Scaptotrigona spp (SCT). The extracts were characterized by color, pH, visual appearance, solid content, antioxidant capacity, total polyphenol content, and bacterial inhibition capacity.  RESULTS: The highest extraction performance was obtained when the ultrasound-assisted method was used, especially for the ANG extract, which in addition to presenting inhibition for gram-negative (E. coli) and gram-positive (S. Aureus) bacteria, had the best antioxidant activity with a value of 545 mg GAE / 100 g of sample and total polyphenol content of 1,884 mg GAE / 100 g of sample.  CONCLUSIONS: Ultrasound-assisted extraction can be considered a low-cost alternative to increase the extraction performance of crude propolis, together with its total polyphenol content and antioxidant capacity, without altering its physical properties.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  ANTECEDENTES: El propóleos ha sido considerado un material de alto valor por sus propiedades terapéuticas. Sin embargo, en Colombia la comercialización de propóleos está limitada no solo por la baja producción sino también por el incipiente conocimiento sobre la extracción eficiente de este. Por ello, encontrar un método de extracción óptimo y económico para la obtención de propóleos es una necesidad para los apicultores que abriría nuevas posibilidades para el uso industrial y por tanto para el mercado.  OBJETIVOS:  El objetivo de este estudio fue evaluar un método de extracción convencional y asistido por ultrasonido (US) buscando el mayor rendimiento y alto contenido de compuestos bioactivos en extractos de propóleos.  MÉTODOS:  La extracción se realizó para tres propóleos crudos de diferentes tipos de abejas Tetragonisca angustula o Angelita (ANG), Melipona eburnea o Melipona (MEL) y Scaptotrigona spp (SCT). Todos los extractos se caracterizaron por su color, pH, apariencia visual, contenido de sólidos, capacidad antioxidante, contenido total de polifenoles y capacidad de inhibición bacteriana.  RESULTADOS: El mayor rendimiento de extracción se obtuvo cuando se usó el método asistido por ultrasonido y específicamente para el extracto ANG, que además de presentar inhibición para bacterias gram negativas (E. coli) y gram positivas (S. Aureus), tuvo la mejor actividad antioxidante con un valor de 545 mg GAE / 100 g de muestra y contenido total de polifenoles de 1884 mg GAE / 100 g de muestra.  CONCLUSIONES: La extracción asistida por ultrasonido puede considerarse una alternativa de bajo costo para aumentar el rendimiento de extracción del propóleos crudo, así como su contenido total de polifenoles y capacidad antioxidante sin alterar sus propiedades físicas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Propolis extract]]></kwd>
<kwd lng="en"><![CDATA[Antioxidant activity]]></kwd>
<kwd lng="en"><![CDATA[Antibacterial activity]]></kwd>
<kwd lng="en"><![CDATA[Melipona eburnea]]></kwd>
<kwd lng="en"><![CDATA[Scaptotrigona spp]]></kwd>
<kwd lng="en"><![CDATA[Tetragonisca angustula]]></kwd>
<kwd lng="en"><![CDATA[S. aureus]]></kwd>
<kwd lng="en"><![CDATA[E. coli]]></kwd>
<kwd lng="es"><![CDATA[Extracto de propóleos]]></kwd>
<kwd lng="es"><![CDATA[actividad antioxidante]]></kwd>
<kwd lng="es"><![CDATA[actividad antibacteriana]]></kwd>
<kwd lng="es"><![CDATA[Melipona eburnea]]></kwd>
<kwd lng="es"><![CDATA[Scaptotrigona spp]]></kwd>
<kwd lng="es"><![CDATA[Tetragonisca angustula]]></kwd>
<kwd lng="es"><![CDATA[S. aureus]]></kwd>
<kwd lng="es"><![CDATA[E. coli]]></kwd>
</kwd-group>
</article-meta>
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