title: Characterization of statistically produced xylanase for enrichment of fruit juice clarification process.
abstract: Critical factors for xylanase production of Bacillus stearothermophilus under batch fermentation and for clarification of citrus fruit juice using this xylanase were optimized through central composite design of response surface methodology. Statistical approach resulted in an increase of 1.19-fold in xylanase yield over conventional method. Model equation for juice clarification included independent variables viz. temperature, incubation time and enzyme dose to study the dependent variables such as yield, acidic neutrality and filterability etc. Coefficient of determination, R(2) for enzyme production model and for different juice properties were in accordance with the linearity of the model. On the basis of the contour plots the optimum enzyme dose was 12.5 IU/g of xylanase. Enzymatic treatment has resulted in the improvement of twofold in the release of reducing sugars and 52.97% in juice yield, whereas 35.34% reduction in turbidity was observed.
authors.affiliation: Biotechnology Group, Thapar Center for Industrial Research and Development (TCIRD), Yamuna Nagar 135001, India.
authors.forename: Saurabh Sudha
authors.initials: SS
authors.lastname: Dhiman
authors.forename: Gaurav
authors.initials: G
authors.lastname: Garg
authors.forename: Jitender
authors.initials: J
authors.lastname: Sharma
authors.forename: Ritu
authors.initials: R
authors.lastname: Mahajan
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D001628:Beverages; D018552:Daucus carota; D005525:Food-Processing Industry / Q000379:methods*; D001411:Geobacillus stearothermophilus / Q000201:enzymology* / Q000254:growth & development; D014995:Xylosidases / Q000096:biosynthesis / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D001426:Bacterial Proteins; D014995:Xylosidases