A comparative study on composition and antioxidant activities of supercritical carbon dioxide, hexane and ethanol extracts from blackberry (Rubus fruticosus ) growing in Poland

2017 ◽  
Vol 97 (11) ◽  
pp. 3576-3583 ◽  
Author(s):  
Anna Wajs-Bonikowska ◽  
Agnieszka Stobiecka ◽  
Radosław Bonikowski ◽  
Agnieszka Krajewska ◽  
Magdalena Sikora ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Comparative Study ◽  
Antioxidant Activities ◽  
Rubus Fruticosus ◽  
Ethanol Extracts ◽  
Supercritical Carbon

scholarly journals COMPARATIVE STUDY ON VOLATILE COMPOUNDS OF AGARWOOD FROM KHANH HOA PROVINCE EXTRACTED BY DIFFERENT METHODS

2018 ◽  
Vol 56 (4A) ◽  
pp. 266 ◽  
Author(s):  
DINH Thi Thu Thuy ◽  
Tran Thi Tuyen ◽  
Nguyen Quyet Chien ◽  
Tran Thi Thu Thuy ◽  
Hoang Thi Bich ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Comparative Study ◽  
Volatile Compounds ◽  
Product Yield ◽  
Microwave Assisted ◽  
Almost All ◽  
Time And Energy ◽  
Aquilaria Crassna ◽  
Supercritical Carbon

Agarwood from Aquilaria crassna cultivated in Khanh Hoa province was extracted by 5 methods, including simple, enzyme-assited, and microwave-assisted hydrodistillation, extraction with solvent and supercritical carbon dioxide. The volatile compounds of the products were analyzed by GC-MS. Almost all samples contain some common characteristic components, such as Valerianol, Agarospirol, Eudesmol <b->, Eudesmol <10-epi-g->, 2-Allyl-4-methylphenol, Guaiol and Neopetasone. However, there were obvious differences in yields, composition, and number of identified components. The application of the more advanced methods for the extraction of agarwood resulted in saving of time and energy, and some improvement of product yield. However, these methods also lead to unconventional products with many unknown components, what requires further investigations.

scholarly journals Enhancing Phenolic Contents and Antioxidant Potentials ofAntidesma thwaitesianumby Supercritical Carbon Dioxide Extraction

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Warut Poontawee ◽  
Surapol Natakankitkul ◽  
Orawan Wongmekiat
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Added Value ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Phenolic Constituents ◽  
Supercritical Carbon

Supercritical fluid extraction (SFE) has increasingly gained attention as an alternative technique for extraction of natural products without leaving toxic residues in extracts.Antidesma thwaitesianumMuell. Arg. (Phyllanthaceae), or ma mao, has been reported to exhibit antioxidant health benefits due to its phenolic constituents. To determine whether SFE technique could impact on phenolic contents and associated antioxidant potentials, ripe fruits ofAntidesma thwaitesianum(Phyllanthaceae) were extracted using supercritical carbon dioxide (SC-CO2) and conventional solvents (ethanol, water). The results showed that the SC-CO2extract contained significantly higher yield, total phenolic, flavonoid, and proanthocyanidin contents than those obtained from ethanol and water. It also demonstrated the greatest antioxidant activities as assessed by ABTS radical cation decolorization, DPPH radical scavenging, and ferric reducing antioxidant power (FRAP) assays. Further analysis using high-performance liquid chromatography with diode array and mass spectrometry detectors (HPLC-DAD/MSD) revealed the presence of catechin as a major phenolic compound ofAntidesma thwaitesianum(Phyllanthaceae), with the maximum amount detected in the SC-CO2extract. These data indicate that SFE technology improves both quantity and quality ofAntidesma thwaitesianumfruit extract. The findings added more reliability of using this technique to produce high added value products from this medicinal plant.

Friedel−Crafts Alkylation of Anisole in Supercritical Carbon Dioxide:  A Comparative Study of Catalysts

2005 ◽  
Vol 9 (4) ◽  
pp. 451-456 ◽  
Author(s):  
Rodrigo Amandi ◽  
Peter Licence ◽  
Stephen K. Ross ◽  
Olli Aaltonen ◽  
Martyn Poliakoff
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Comparative Study ◽  
Supercritical Carbon
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