Preparation of polyphenol fine particles potent antioxidants by a supercritical antisolvent process using different extracts of Olea europaea leaves
| Autor: | Clara Pereyra, Casimiro Mantell, Lourdes Casas, A. Montes, Sangma Pattabhi, Enrique J. Martínez de la Ossa, M.T. Fernández-Ponce, Chandrasekar Chinnarasu |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Chromatography
Ethanol Antioxidant biology Chemistry Precipitation (chemistry) General Chemical Engineering medicine.medical_treatment Extraction (chemistry) 04 agricultural and veterinary sciences General Chemistry biology.organism_classification 040401 food science Supercritical fluid chemistry.chemical_compound 0404 agricultural biotechnology Polyphenol Olea Yield (chemistry) medicine |
| Zdroj: | Korean Journal of Chemical Engineering. 33:594-602 |
| ISSN: | 1975-7220 0256-1115 |
| Popis: | Various extracts from olive leaves have been precipitated by a supercritical antisolvent (SAS) process to evaluate the possibility of producing polyphenol fine particles with controlled size and size distribution. Olive leaves were initially extracted with subcritical fluids using mixtures of CO2+ethanol at 10% and 50%, by pressurized liquid extraction (PLE) with water, ethanol and a hydroalcoholic mixture (50: 50) (v/v), and also by conventional ethanol extraction (CE). PLE gave the extract with the highest yield and the best antioxidant activity. SAS precipitation was unsuccessful for the extracts obtained with pressurized water and with the hydroalcoholic mixture (50: 50) (v/v). The SAS precipitates with the smallest particle sizes were produced from extracts obtained with subcritical fluids. The SAS precipitates obtained after the conventional ethanol extraction of olive leaves showed the best antioxidant activity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink