Warning: XSLTProcessor::transformToXml() [xsltprocessor.transformtoxml]: I/O warning : failed to load external entity "file:////srv/scielo/www/bases/xml/ind/v35n3/2224-5421-ind-35-03-480.xml" in /srv-new/scielo/www/htdocs/class.XSLTransformerPHP5.php on line 36 Efecto del campo magnético sobre el potencial bioenergético de Chlorella vulgaris y Dunaliella viridis