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| Xiao,Jian Bo; Chen,Jing Wen; Xu,Ming. |
| The essential oil of Marchantia convoluta was obtained by supercritical (carbon dioxide) extraction using methanol as a modifier. Global yields were determined according to the orthogonal design. The effects of different parameters, such as pressure, temperature, modifier volume and extraction time, on the supercritical fluid extraction (SFE) of essential oil from M. convoluta were investigated. Maximum global yields were obtained using the following conditions: extraction temperature, 35ºC; dynamic time, 35 min; pressure, 15 Mpa and modifier volume, 40 mL. The essential oil extract was analyzed by capillary gas chromatography with mass spectrometric detector (GC-MS). The compounds were identified according to their retention indices and mass spectra (EI,... |
| Tipo: Journal article |
Palavras-chave: GC-MS; Supercritical fluid extraction; Yields. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100013 |
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| Messina, Concetta Maria; Troia, Angelo; Arena, Rosaria; Manuguerra, Simona; Ioannou, Theodora; Curcuraci, Eleonora; Renda, Giuseppe; Hellio, Claire; Santulli, Andrea. |
| n this study we focused on four taxa of the genus Calendula (C. maritima, C. suffruticosa subsp. fulgida, C. arvensis, and the hybrid between the first two ones), collected in Mediterranean area (Sicily). Six extracts for each species were obtained using solvents with increasing polarity (hexane, ethanol 80%, acetone 70%, and water) and through extraction by supercritical fluids (SFE). It has been observed that the solvent with the highest extraction efficiency was ethanol 80% for all species. However, SFE extracts showed high antioxidant activity comparable to the ethanol 80% extract (polyphenol, DPPH, and reducing power method). These findings were confirmed by in vitro analysis (MTT assay) where it was observed that the tested concentration (24 µg/mL),... |
| Tipo: Text |
Palavras-chave: Calendula species; Marigold; Supercritical fluid extraction; Bioactivity; Antioxidants; Polyphenols. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70336/68389.pdf |
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