Development of a modified biosensor by a crude extract of guariroba (syagrus oleracea) for the analysis of phenolic compounds in environmental samples - Gil, Eric de Souza; Moraes, Fernando Cruz de; Oliveira, Aline de; Santana, Juliana Chaves; Siqueira, Eduardo Queija de; Machado, Sergio Antonio Spinola (Spring Meeting of the International Society of Electrochemistry, 2008)