<?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>2224-6185</journal-id>
<journal-title><![CDATA[Tecnología Química]]></journal-title>
<abbrev-journal-title><![CDATA[RTQ]]></abbrev-journal-title>
<issn>2224-6185</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-61852021000200252</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del pH sobre el crecimiento y viabilidad celular de una cepa local de Chlorella vulgaris Beijerinck]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of pH over growth and cellular viability of Chlorella vulgaris Beijerinck local strain]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Luna]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortega-Díaz]]></surname>
<given-names><![CDATA[Yadenis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tormos-Cedeño]]></surname>
<given-names><![CDATA[Lilisbeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Oriente Centro Nacional de Electromagnetismo Aplicado (CNEA) Laboratorio de Ecotoxicología y Servicios Ambientales]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Oriente Facultad de Ciencias Naturales y Exactas Carrera de Biología. Departamento de Biología y Geografía]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>252</fpage>
<lpage>276</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-61852021000200252&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-61852021000200252&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-61852021000200252&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Entre las microalgas de mayor importancia por su valor económico y nutricional, tanto para animales como humanos se encuentra Chlorella vulgaris Beijerinck, con múltiples aplicaciones por su calidad proteica y las propiedades de sus metabolitos. A pesar de ello existen limitantes en su producción a gran escala, y vacíos en cuanto a la estandarización de cultivos, en especial para cepas locales utilizadas con fines biotecnológicos. En este trabajo se evaluó el efecto del pH en el rango de 5 a 8, sobre el crecimiento y viabilidad de una cepa local de C. vulgaris aislada de un embalse del oriente de Cuba, estableciendo cultivos aireados y sin aireación a diferentes volúmenes, en condiciones controladas (temperatura: 22 ±2,3 °C, régimen de luz continua Daylight TL-D 36W/ 54-765 a una densidad de flujo fotónico (DFF) de 3 000 lux (58,59 µE m-2s-1). El pH 7 resultó óptimo para el crecimiento y viabilidad de las células, favoreciendo la formación de autósporas. Se obtuvieron valores máximos de concentración celular de 640,5 x104 célmL-1 in minicultivos no aireados Se desarrollaron posteriormente cultivos aireados a mayor volumen a 7 y 7,5, corroborándose los mejores resultados en cuanto al crecimiento a pH 7 (6 066 ± 141x 104 célmL-1), valores 1,2 veces mayor que los obtenidos a 7,5 (4 122 ± 112x 104 célmL-1) (p&#8804;0,05) que es el pH recomendado al cultivar C. vulgaris en medio Bristol.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Among the most important microalgae because of their economic and nutritional value, both for animals and humans, we can mention Chlorella vulgaris Beijerinck, with multiple applications due to its protein quality and its metabolites properties. Despite this, there are limitations in the large-scale cultures, and gaps in relation with standardization of culture parameters, especially in local strains with biotechnological interest. This work it was evaluated the effect of pH into the range of 5 to 8, over the growth and cellular viability of C. vulgaris strain isolated from a water pond of the eastern of Cuba, stablishing aerated and non-aerated cultures at different scales in controlled conditions (temperature: 22 ±2,3 °C, continuous light Daylight TL-D 36W/ 54-765 with a photon flux density (PFD) of 3 000 lux (58,59 µE m-2s-1). The optimum pH value for the growth and viability of C. vulgaris was pH 7, favoring the autospores formation. The maximum values of cell concentration around 640.5 x104 celmL-1 were obtained in non-aeriated mini-cultures. Aerated cultures were developed in 1L of volume, at pH 7 and 7,5 documenting the better results in growth values, being 6066 ± 141x 104 célmL-1 at pH 7; 1,2 times higher than those obtained with pH 7,5 (4122 ± 112x 104 célmL-1) (p&#8804;0,05), which is the recommended pH when Bristol media is used to C. vulgaris culture.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Chlorella vulgaris]]></kwd>
<kwd lng="es"><![CDATA[pH]]></kwd>
<kwd lng="es"><![CDATA[viabilidad celular]]></kwd>
<kwd lng="es"><![CDATA[crecimiento]]></kwd>
<kwd lng="en"><![CDATA[Chlorella vulgaris]]></kwd>
<kwd lng="en"><![CDATA[pH]]></kwd>
<kwd lng="en"><![CDATA[growth]]></kwd>
<kwd lng="en"><![CDATA[cellular viability]]></kwd>
</kwd-group>
</article-meta>
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