Stručni rad
Isolation of Active Substances from the Seeds of the Milk Thistle Plant (Silybum marianum) and Determination of Antioxidant Activity
D. Gašo-Sokač
; Prehrambeno-tehnološki fakultet Osijek, Osijek, Hrvatska; Odjel za kemiju, Sveučilište J. J. Strossmayera; Osijek, Hrvatska
S. Kovač
; Prehrambeno-tehnološki fakultet Osijek, Osijek, Hrvatska; Odjel za kemiju, Sveučilište J. J. Strossmayera; Osijek, Hrvatska
V. Bušić
; Odjel za kemiju, Sveučilište J. J. Strossmayera; Osijek, Hrvatska
Sažetak
Isolation of silymarin, a mixture of well-defined flavonolignans, from the seeds of milk thistle (Silybum marianum) was achieved. Silymarin was extracted from defatted seed with acetone without heating; the yield was Y=4.1 %. The antioxidant activity of silymarin was determined at ambient temperature by means of a 2,2-diphenyl-1-picrylhydrazyl (DPPH) colorimetry with a detection scheme at λ= 515 nm. The activity was evaluated by the decrease in absorbance as the result of a DPPH radical color change from purple to yellow. The results obtained showed that ascorbic acid was a substantially more powerful antioxidant than silymarin, but silymarin was a significantly stronger quencher of DPPH radical than the standard silibinin.
Ključne riječi
Silymarin; silibinin; DPPH radical scavenging; antioxidant activity
Hrčak ID:
71387
URI
Datum izdavanja:
5.9.2011.
Posjeta: 2.565 *