title: Enhanced oxygen transfer rate and bioprocess yield by using magnetite nanoparticles in fermentation media of erythromycin.
abstract: BACKGROUND
  Magnetite nanoparticles have widespread biomedical applications. In the aerobic bioprocesses, oxygen is a limiting factor for the microbial metabolic rate; hence a high availability of oxygen in the medium is crucial for high fermentation productivity. This study aimed to examine the effect of using magnetite nanoparticles on oxygen transfer rate in erythromycin fermentation culture.
  
  
  METHODS
  Magnetite nanoparticles were synthetized through co-precipitation method. After observing the enhanced oxygen transfer rate in deionized water enriched with magnetite nanoparticles, these nanoparticles were used in the media of by Saccharopolyspora erythraea growth to explore their impact on erythromycin fermentation titer. Treatments comprised different concentrations of magnetite nanoparticles, (0, 0.005, 0.02 v/v).
  
  
  RESULTS
  In the medium containing 0.02 v/v magnetite nanoparticles, KLa was determined to be 1.89 time higher than that in magnetite nanoparticle-free broth. An improved 2.25 time higher erythromycin titer was obtained in presence of 0.02 v/v nanoparticles.
  
  
  CONCLUSIONS
  Our results, demonstrate the potential of magnetite nanoparticles for enhancing the productivity of aerobic pharmaceutical bioprocesses.
authors.forename: Ghazal
authors.initials: G
authors.lastname: Labbeiki
authors.forename: Hossein
authors.initials: H
authors.lastname: Attar
authors.forename: Amir
authors.initials: A
authors.lastname: Heydarinasab
authors.forename: Sayed
authors.initials: S
authors.lastname: Sorkhabadi
authors.forename: Alimorad
authors.initials: A
authors.lastname: Rashidi
mesh_terms: D003470:Culture Media / Q000737:chemistry / Q000494:pharmacology; D004917:Erythromycin / Q000096:biosynthesis*; D005285:Fermentation; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D010100:Oxygen / Q000378:metabolism*; D010316:Particle Size; D016930:Saccharopolyspora / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*
chemical_list: D003470:Culture Media; D058185:Magnetite Nanoparticles; D004917:Erythromycin; D010100:Oxygen