Počet záznamů: 1

Beta-Sitosterol: Supercritical Carbon Dioxide Extraction from Sea Buckthorn (Hippophae rhamnoides L.) Seeds

  1. 1.
    0342400 - UCHP-M 2011 RIV US eng J - Článek v odborném periodiku
    Sajfrtová, Marie - Ličková, I. - Wimmerová, Martina - Sovová, Helena - Wimmer, Zdeněk
    Beta-Sitosterol: Supercritical Carbon Dioxide Extraction from Sea Buckthorn (Hippophae rhamnoides L.) Seeds.
    International Journal of Molecular Sciences. Roč. 11, č. 4 (2010), s. 1842-1850 E-ISSN 1422-0067
    Grant CEP: GA MŠk 2B06024
    Výzkumný záměr: CEZ:AV0Z40720504; CEZ:AV0Z50380511
    Klíčová slova: sea buckthorn seed * supercritical carbon dioxide * beta-sitosterol
    Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství
    Impakt faktor: 2.279, rok: 2010

    Supercritical fluid extraction represents an efficient and environmentally friendly technique for isolation of phytosterols from different plant sources. Sea buckthorn (Hippophae rhamnoides L.) seeds were extracted with supercritical carbon dioxide at pressures ranging from 15–60 MPa and temperatures of 40-80 °C. Oil and beta-sitosterol yields were measured in the extraction course and compared with Soxhlet extraction with hexane. The average yield of beta-sitosterol was 0.31 mg/g of seeds. The maximum concentration of beta-sitosterol in the extract, 0.5% w/w, was achieved at 15 MPa, 40 °C, and a carbon dioxide consumption of 50 g/g of seeds. The extraction rate was maximal at 60 MPa and 40 °C. Both beta-sitosterol yield and its concentration in the extract obtained with hexane were lower than with carbon dioxide.
    Trvalý link: http://hdl.handle.net/11104/0185143