title: Individual and combined effects of physicochemical parameters on ellagitannin acyl hydrolase and ellagic acid production from ellagitannin by Aspergillus oryzae.
abstract: The individual and interactive effects of physicochemical parameters on ellagitannin acyl hydrolase activity and ellagic acid production by Aspergillus oryzae using ellagitannins from acorn fringe of oak as substrate were studied. Ellagitannins concentration, incubation time were identified as important physicochemical parameters influencing the enzyme synthesis and the production accumulation, and the substrate concentration with initial pH was determined to has an interactive effect on the enzyme synthesis, while ellagitannins concentration and initial pH with incubation time were found to have interactions on the production accumulation. Furthermore, the parameters were optimized by quadratic programming. Under optimum condition, the fermentation run lasted 84 h with 4 g L(-1) ellagitannins concentration, yielding 17.7% ellagic acid. However, the maximum enzyme activity was obtained in 96 h with 5 g L(-1) substrate concentration. The research demonstrated a possible way to develop an efficient approach for recovery of higher added-value product (ellagic acid) from forestry byproduct (acorn fringe of oak).
authors: Institute for Nanobiomedical Technology and Membrane Biology, State Key Lab of Biotherapy of Human Diseases, Cancer Center, West China Hospital, Chengdu, Gaoxin District 610041, China.
authors: W
authors: W
authors: Huang
authors: H
authors: H
authors: Niu
authors: G H
authors: GH
authors: Gong
authors: Y R
authors: YR
authors: Lu
authors: Z S
authors: ZS
authors: Li
authors: H
authors: H
authors: Li
mesh_terms: D000215:Acylation; D001236:Aspergillus oryzae / Q000378:metabolism*; D003198:Computer Simulation; D004610:Ellagic Acid / Q000138:chemical synthesis*; D004789:Enzyme Activation; D006867:Hydrolases / Q000737:chemistry*; D047348:Hydrolyzable Tannins / Q000737:chemistry*; D008956:Models, Chemical
chemical_list: D047348:Hydrolyzable Tannins; C013515:ellagitannin; D004610:Ellagic Acid; D006867:Hydrolases