publication . Conference object . 2013

Extrakce beta-sitosterolu z kořenů kopřivy superkritickým CO2

Sajfrtová, Marie;
Open Access Czech
  • Published: 01 Jan 2013
  • Country: Czech Republic
The stinging nettle root contains both polar and non-polar biologically active substances. beta-Sitosterol (BS), the most important component of its neutral lipids, is active in the root extracts used for various alternative medicine treatments, including the reduction of enlarged prostate. Dry roots contaning 0.28 g/kg BS were extracted with CO2 at pressure 12-60 MPa and temperature 40-80 C. Though the maximum yield of BS was only 89 %, its concentration in extract was increased by 13 % compared to the extraction with hexane. Changing vials where the CO2 extract was collected, fractions with double and higher BS concentration could be obtained. The fractionatio...
free text keywords: Urtica dioisa; kinetics; supercritical fluid extraction
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