title: [Supercritical CO2 fluid extraction of Rosmarinus officinalis and capability of extracts eliminate OH radical].
abstract: OBJECTIVE
  Supercritical CO2 fluid extraction process of antioxidation active components from Rosmarinus officinalis was studied.
  
  
  METHODS
  A new extraction process of components extracted from R. officinalis by supercritical CO2 fluid extraction (SFE-CO2 ) was studied in detail. The capability of that the extract eliminate *OH radical was tested by electron paramagnetic resonance (EPR) technique and spin catch technique.
  
  
  CONCLUSIONS
  With free radical clearance as index, by range and variance analysis, the optimum extraction process conditions were: keeping pressure at 30 MPa and temperature at 75 degrees C for 1 h, in the same time adding alcohol 0.30 mL x g(-1).
authors.affiliation: Material and Chemical Engineering School, Hainan University, Key Lab. of Tropic Biological Resource of Chinese Education Ministry, Haikou 570228, China.
authors.forename: Chong
authors.initials: C
authors.lastname: Zhang
authors.forename: Jia-Cheng
authors.initials: JC
authors.lastname: Li
authors.forename: De-La
authors.initials: DL
authors.lastname: Zhang
authors.forename: Yu-Hong
authors.initials: YH
authors.lastname: Feng
authors.forename: Ya-Nan
authors.initials: YN
authors.lastname: Zhang
authors.forename: Si-Li
authors.initials: SL
authors.lastname: Chen
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D017665:Hydroxyl Radical / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D027542:Rosmarinus / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; D002245:Carbon Dioxide; D017665:Hydroxyl Radical