title: Enhancing arachidonic acid production by Mortierella alpina ME-1 using improved mycelium aging technology.
abstract: Traditional mycelium aging technology was improved to enhance arachidonic acid (ARA) production by Mortierella alpina ME-1. Filtration step was skipped and additional carbon and nitrogen sources were fed during aging. The levels of the significant factors (time, temperature, ethanol, and KNO(3)) affecting ARA production during improved aging process were also optimized by applying response surface methodology (RSM), and the maximum ARA yield of 19.02 g/l was achieved in a 5 l fermentor at 5.6 days, temperature 13.7 degrees C, ethanol 42.44 g/l, and KNO(3) 2.62 g/l. This yield was 1.55 times higher than that of traditional aging technology. The improved mycelium aging technology is considered to be a useful strategy for enhancing ARA production.
authors.affiliation: College of Life Science and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, China.
authors.forename: Ming-Jie
authors.initials: MJ
authors.lastname: Jin
authors.forename: He
authors.initials: H
authors.lastname: Huang
authors.forename: Ai-Hua
authors.initials: AH
authors.lastname: Xiao
authors.forename: Zhen
authors.initials: Z
authors.lastname: Gao
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.forename: Chao
authors.initials: C
authors.lastname: Peng
mesh_terms: D016718:Arachidonic Acid / Q000378:metabolism*; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D003470:Culture Media / Q000737:chemistry; D000431:Ethanol / Q000737:chemistry; D044943:Fatty Acid Desaturases / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry; D005285:Fermentation; D008962:Models, Theoretical; D020094:Mortierella / Q000378:metabolism*; D025282:Mycelium / Q000378:metabolism*; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
chemical_list: D003470:Culture Media; D005227:Fatty Acids; D016718:Arachidonic Acid; D000431:Ethanol; D044943:Fatty Acid Desaturases