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Synthesis of vanillyl-maltoside using glucosidases by response surface methodology

Ramaiah, Sivakumar and Balaraman, Manohar and Soundar, Divakar (2007) Synthesis of vanillyl-maltoside using glucosidases by response surface methodology. European Food Research and Technology, 226. pp. 255-263.

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Abstract

Amyloglucosidase from Rhizopus mold and β- glucosidase from sweet almond, catalysed synthesis of vanillyl-maltoside was optimized using response surface methodology. A central composite rotatable design involving 32 experiments of five variables at five levels was employed. Among the variables employed, glucosidases (10– 50% w/w of maltose), vanillin (0.5–2.5 mmol), incubation period (24–120 h), buffer volume 0.4–2.0 ml (0.04–0.2 mM) and pH (4.0–8.0); enzyme, buffer concentration and buffer pH were found to be significant with both the enzymes. Surface plots generated clearly brought out the maltosylation behaviour of the two glucosidases in this reaction with both the enzymes exhibiting yields in the range 5–60%. Saddleshaped surface plots observed with both the enzymes exhibited total reversal of the maltosylation behaviour at certain critical crossover points like 30% (w/w maltose) enzyme concentration, buffer pH 6.0 and a buffer concentration of 1.25 ml (0.125 mM), implying that a critical enzyme to buffer concentration and pH dictate the extent of vanillin maltosylation. Validation experiments conducted at certain random selected conditions as well as those conducted at optimum conditions obtained from the reduced model showed good correspondence between predicted and experimental yields

Item Type: Article
Uncontrolled Keywords: Amyloglucosidase . Buffer concentration . CCRD . Enzyme concentration . β-Glucosidase . Incubation period . pH . Vanillyl-maltoside
Subjects: 600 Technology > 08 Food technology > 16 Nutritive value > 05 Enzymes
600 Technology > 08 Food technology > 05 Processing and Engineering
Divisions: Fermentation Technology and Bioengineering
Food Engineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 26 Jun 2009 06:47
Last Modified: 28 Dec 2011 10:10
URI: http://ir.cftri.com/id/eprint/9121

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