Search results for "Calycosin"
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Enhanced extraction of isoflavonoids from Radix Astragali by incubation pretreatment combined with negative pressure cavitation and its antioxidant a…
2011
Abstract Incubation pretreatment with the function of endogenous enzyme combined with negative-pressure cavitation extraction (IP-NPCE) was established to extract calycosin and formononetin from Radix Astragali. Significant factors involved in the process were selected using Plackett–Burman factorial design (PBD) and then were optimized by central composite design (CCD). The optimum experimental conditions were incubation at 35 °C, 60 min, pH 4.0 and extraction at negative pressure − 0.080 MPa, ethanol concentration 60%, 60 mesh, 30 min, solid-to-liquid ratio 1:25 and two cycles. Under the optimal conditions, the extraction yields of calycosin and formononetin were 0.650 ± 0.015 and 0.307 ±…
Preparation and antioxidant activity of Radix Astragali residues extracts rich in calycosin and formononetin
2011
Abstract Radix Astragali is considered an excellent source of Traditional Chinese Medicine and a kind of famous restorative food. To make full usage of Radix Astragali, calycosin and formononetin were enriched through various macroporous resins from its residues, HPD500 resin, compared with other resins, offered the best effectiveness for the enrichment and separation of compounds. 35 °C was selected for its highest adoption capacity during static adsorption process, which can be obtained from adsorption isotherms. And then dynamic adsorption and desorption tests were carried out to optimize the operating parameters. After one run treatment with HPD500 resin, the contents of calycosin and f…