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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/32690

Title: Modification of the activity of an a-amylase from Bacillus licheniformis by several surfactants
Authors: Bravo Rodríguez, Vicente
Jurado Alameda, Encarnación
Martínez Gallegos, Juan Francisco
Reyes Requena, Antonia
García López, Ana Isabel
Sampaio Cabral, Joaquim Manuel
Fernandes, Pedro
Pina da Fonseca, Luis Joaquim
Issue Date: 2006
Abstract: The influence of different commercial surfactants on the enzymatic activity of a commercial α-amylase from Bacillus licheniformis (Termamyl 300 L) has been studied. As non-ionic surfactants, alkyl polyglycosides (Glucopon® 215, Glucopon® 600 and Glucopon® 650) were studied, as were fatty alcohol ethoxylates (Findet 1214N/23 and Findet 10/15), and nonyl phenol ethoxylate (Findet 9Q/21.5NF). Also, an anionic surfactant, linear alkyl benzene sulfonate (LAS) was assayed. In general, none of the non-ionic surfactants studied, except Findet 10/15, vary substantially the enzymatic activity. Findet 10/15 has the strongest hydrophobic character and reduces the enzymatic activity more significantly the greater its concentration. Regarding LAS, this surfactant significantly depressed enzymatic activity, presumably due to the electrostatic interactions caused by its anionic character.
Sponsorship: Fellowship awarded to Juan Francisco Martínez Gallegos by Spanish Ministry of Science and Education, FPU fellowships program.
Publisher: Pontificia Universidad Católica de Valparaíso (Chile)
Keywords: α-amylase
Alkyl polyglycosides
Enzymatic activity
Fatty alcohol ethoxylates
Linear alkyl benzene sulfonate
Nonyl phenol ethoxylate
URI: http://hdl.handle.net/10481/32690
ISSN: 0717-3458
Citation: Bravo Rodríguez, V.; et al. Modification of the activity of an a-amylase from Bacillus licheniformis by several surfactants. Electronic Journal of Biotechnology, 9(5): 566-571 (2006). [http://hdl.handle.net/10481/32690]
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