Study of the reaction of acid ester production of greasy for it saw enzymatic objectifying nourishing applications / Estudo da reaÃÃo de produÃÃo de Ãsteres de Ãcidos graxos por via enzimÃtica objetivando aplicaÃÃes alimentÃcias

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Several experiments were done aiming at the study on the enzymatic esterification of the oleic acid with fructose in ethanolic medium, focusing the synthesis of biodegradable biosurfactants. For that purpose, it was utilized the enzyme, Candida antartica B., at temperature of 55 ÂC, in reacting time of 48, 72, 96 e 120 hours. Accordingly to the obtained results it was verified that the related enzyme catalyzed primarily the ethanol present in the reactional medium to form the ester: ethyl oleate. This fact was confirmed through magnetic nuclear resonance spectra (1H and 13C) as well as, through infrared spectrum, by the presence of absorption peak at 1738, 4 cm- 1, characteristic of that ester. The results of the reaction of ethyl oleate production indicate that the highest yield was observed in about 96 hours time, and for the 120 hours time it was observed also an inferior yield. The experiments accomplished for the obtention of fructose esters from oleic acids in ethanolic medium were not successful like in other solvents not recommended for food use. The ethyl oleate shows a lipophilic character and in the food industry it finds application in the osmotic dehydration of tomatoes and peppers âdedo de moÃaâ, improving water release, sugar yield and solar brightness. The use of ethyl oleate in the dehydration process decreases the drying time increases its efficiency without leaving any traces pf chemical residues

ASSUNTO(S)

ciencia e tecnologia de alimentos biodegradable, lipases, esterification, biosurfactants, ethyl oleate. biodegradÃvel, lipases, esterificaÃÃo, biosurfactantes, oleato de etila.

ACESSO AO ARTIGO

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