title: Effects of gas periodic stimulation on key enzyme activity in gas double-dynamic solid state fermentation (GDD-SSF).
abstract: The heat and mass transfer have been proved to be the important factors in air pressure pulsation for cellulase production. However, as process of enzyme secretion, the cellulase formation has not been studied in the view of microorganism metabolism and metabolic key enzyme activity under air pressure pulsation condition. Two fermentation methods in ATPase activity, cellulase productivity, weight lose rate and membrane permeability were systematically compared. Results indicated that gas double-dynamic solid state fermentation had no obviously effect on cell membrane permeability. However, the relation between ATPase activity and weight loss rate was linearly dependent with r=0.9784. Meanwhile, the results also implied that gas periodic stimulation had apparently strengthened microbial metabolism through increasing ATPase activity during gas double-dynamic solid state fermentation, resulting in motivating the production of cellulase by Trichoderma reesei YG3. Therefore, the increase of ATPase activity would be another crucial factor to strengthen fermentation process for cellulase production under gas double-dynamic solid state fermentation.
authors.affiliation: State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Beijing 100190, China. Electronic address: hzchen@home.ipe.ac.cn.
authors.forename: Hongzhang
authors.initials: H
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Meixue
authors.initials: M
authors.lastname: Shao
authors.affiliation: State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Beijing 100190, China.
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Li
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000388:Air; D000399:Air Pressure; D019149:Bioreactors; D002463:Cell Membrane Permeability; D002480:Cellulase / Q000378:metabolism*; D003470:Culture Media; D004867:Equipment Design; D005285:Fermentation; D005656:Fungal Proteins / Q000378:metabolism*; D006358:Hot Temperature; D009172:Mycology / Q000295:instrumentation / Q000379:methods*; D014242:Trichoderma / Q000201:enzymology* / Q000254:growth & development / Q000648:ultrastructure
chemical_list: D003470:Culture Media; D005656:Fungal Proteins; D002480:Cellulase; D000251:Adenosine Triphosphatases
keywords: ATPase activity; Cellulase; Gas periodic stimulation; Microbial metabolism; Solid state fermentation