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Short Communication: Energetics of glucoamylase-catalyzed hydrolysis of commercial sago starch

Year: 2011

Type: article

Abstract: . Glucoamylase (EC 3.2.1.3) from Aspergillus niger was used to hydrolyze commercial sago starch into reducing sugars. The energetics of the hydrolysis was studied at optimal substrate concentration, enzyme amount and pH for the process. The ∆H and ∆S estimated via van’t Hoff analysis were 7.9 J.mole-1 and 6.2 J.mole-1.K-1, respectively. The results indicated that the hydroly-sis process is an endothermic reaction and spontaneous within the temperature range tested. It is calculated that 26.3 J.mole-1 of activation energy, Ea is required for the enzymatic conversion of sago starch into reducing sugars. The spontaneous reaction with relatively low activation energy supported the viability of glucoamylase-catalyzed hydrolysis of sago starch.

Source: The University of Malaya Research Repository (University of Malaya)

Authors: Lai Long Wee, Mohamad Suffian Mohamad Annuar, Bin Mohamad Annuar

Institution: University of Malaya

Language: English

Topic: thermodynamics and calorimetric analyses

Subfield: Physical and Theoretical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funder: Universiti Malaya

OpenAlex ID: W2109119906

FWCI: 0.313

Cites: 8

Cited by: 4

Related to: 10