<?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>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562020000300046</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v22i3.1185</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Physicochemical and microbiological characterization, and evaluation of the antibacterial and antioxidant activity of propolis produced in two seasons and two areas of the eastern edge of the Sonoran Desert]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización fisicoquímica y microbiológica, y evaluación de la actividad antibacteriana y antioxidante del propóleos producido en dos estaciones y dos áreas del borde oriental del Desierto de Sonora]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Sánchez]]></surname>
<given-names><![CDATA[Rey David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torrescano-Urrutia]]></surname>
<given-names><![CDATA[Gastón R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Escalante]]></surname>
<given-names><![CDATA[Armida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación en Alimentación y Desarrollo, A.C.  ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,CIAD  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>22</volume>
<numero>3</numero>
<fpage>46</fpage>
<lpage>52</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562020000300046&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562020000300046&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562020000300046&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study determined the effects of season and collection location on physicochemical quality and microbiological properties of raw propolis, and the biological activity of propolis extracts. The total phenolic compounds (TPC) and total flavonoid content (TFC) were measured, and antioxidant activity was evaluated by the freeradical scavenging activity (FRSA) and reducing power ability (RPA). The antibacterial activity was determined against Gram-positive (Staphylococcus aureus and Listeria monocytogenes) and Gram-negative (Es-cherichia coli and Salmonella typhimurium) bacteria. The results showed that season affect physicochemical properties, but no different in microbial counts of raw propolis. Propolis extracts collected in both regions during summer had the greatest effect against S. aureus (&gt;17 mm of inhibition zone). In addition, propolis extracts from location 2 and collected during summer exhibit the highest TPC and TFC (&gt;150 and 250 mg/g, respectively), as well as highest FRSA (&gt;70% of radical inhibition) and RPA (&gt;0.2 abs). In conclusion, the season and collection location affect the physicochemical properties of propolis and extract bioactivities of propolis.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Esta investigación determinó los efectos de la estación y el área de colecta sobre la calidad fisicoquímica y microbiológica del propóleos crudo, y la actividad biológica de los extractos de propóleos. El contenido de compuestos fenólicos totales (CFT) y de flavonoides totales (CFvT) fue medido en los extractos de propóleos; así como la actividad antioxidante, mediante la actividad de eliminación de radicales libres (AERL) y la habilidad de poder reductor (HPR). La actividad antibacteriana se determinó contra bacterias Gram-positivas (Staphylococcus aureus y Listeria monocytogenes) y Gram-negativas (Escherichia coli y Salmonella typhimurium). Los resultados mostraron que la estación afecta las propiedades fisicoquímicas, sin encontrarse diferencias en los recuentos microbianos del propóleos crudo. Los extractos recolectados en ambas regiones durante el verano tuvieron el mayor efecto contra S. aureus (&gt;17 mm de zona de inhibición). Además, los extractos de propóleos de la zona 2 y recolectados durante el verano mostraron el mayor CFT and CFvT (&gt;150 y 250 mg/g, respectivamente), así como la más alta AERL (&gt;70% de inhibición de radicales libres) y HPR (&gt;0.2 abs). En conclusión, la estación y área de colecta afectan las propiedades fisico-químicas y bioactividad de los extractos de propóleos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Propolis]]></kwd>
<kwd lng="en"><![CDATA[Phenolic compound]]></kwd>
<kwd lng="en"><![CDATA[Antibacterial]]></kwd>
<kwd lng="en"><![CDATA[Antioxidant]]></kwd>
<kwd lng="es"><![CDATA[Propóleos]]></kwd>
<kwd lng="es"><![CDATA[Compuestos fenólicos]]></kwd>
<kwd lng="es"><![CDATA[Antibacteriano]]></kwd>
<kwd lng="es"><![CDATA[Antioxidante]]></kwd>
</kwd-group>
</article-meta>
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