An increase in specific antioxidant activity of extracts from rosemary (Rosemarinus officinalis) is obtained by the use of a blend of tetrafluoroethane and an organic solvent in the extraction process. A blend of tetrafluoroethane, acetone and methanol improves total yield. A tetrafluoroethane and acetone...http://www.google.com/patents/US6450935?utm_source=gb-gplus-sharePatent US6450935 - Method for removing essential oils and antioxidants from extract products of lamiaceae species using rolled film evaporation
