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Modification of the activity of an alpha-amylase from Bacillus licheniformis by several surfactants Electron. J. Biotechnol.
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.
The influence of different commercial surfactants on the enzymatic activity of a commercial alpha-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...
Tipo: Journal article Palavras-chave: Alpha-amylase; Alkyl polyglycosides; Enzymatic activity; Fatty alcohol ethoxylates; Linear alkyl benzene sulfonate; Nonyl phenol ethoxylate.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000500012
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Production, characterization and application of inulinase from fungal endophyte CCMB 328 Anais da ABC (AABC)
Nascimento,Diego S.; Valasques Junior,Gildomar; Fernandes,Pedro; Ribeiro,Geise C.A.; Lima,Danyo M.; Góes-Neto,Aristóteles; Oliveira,Rodrigo Q.; Figueiredo-Ribeiro,Rita de Cassia L.; Assis,Sandra A. de.
Inulinase (β-2,1-D- fructan fructanohydrolase), EC 3.2.1.7, targets the β-2,1 linkage of inulin, a polyfructan consisting of linear β-2,1 linked fructose, and hydrolyzes it into fructose. This use provides an alternative to produce fructose syrup through the hydrolysis of inulin. The objective of this work was to study the production, characterization and applications of inulinases from the fungal endophyte CCMB 328 isolated from the Brazilian semi-arid region. Response Surface Methodology (RSM) was employed to evaluate the effect of variables (concentration of glucose and yeast extract), on secreted inulinase activities detected in the culture medium and also in the inulin hydrolysis. The results showed that the best conditions for inulinase production by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inulin; Inulinase; Yeasts; Semi-arid; Fungal endophyte.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200014
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