Ultrasound-Assisted Extraction and Biological Activities of Extracts of Brassica oleracea var.

Valéria Dal Prá1, Carolina Bolssoni Dolwitsch1, Fernanda Oliveira Lima2Camilo Amaro de Carvalho3, Carine Viana1,
Paulo Cícero do Nascimento4 and 
Marcelo Barcellos da Rosa1,4*

1Post-Graduate Program in Pharmaceutical Sciences, Federal University of Santa Maria, Camobi Campus, 97105-900 Santa
  Maria, RS, Brazil

2Federal University of Fronteira Sul, Centro, 97900-000 Cerro Largo, RS, Brazil
3Medical and Nursing Department, Federal University of Viçosa, Av. Peter Henry Rolfs, s/n, 36570-000 Viçosa, Brazil
4Post-Graduate Program in Chemistry, Federal University of Santa Maria, Camobi Campus, 97105-900 Santa Maria, RS, Brazil

Article history
Received October 4, 2013
Accepted January 26, 2015

Key words:
Brassica oleracea var. capitata, ultrasound-assisted extraction, hydrolysis of extracts, biological activity

In this work, the antioxidant and antimicrobial activities of Brassica oleracea var. capitata extracts obtained through ultrasound-assisted extraction are evaluated. The extracts obtained using the best extraction conditions were subjected to different hydrolysis conditions before their use in the biological tests. The crude and hydrolysed extracts were characterized using gas chromatography coupled with a mass detector. The use of ultrasound at 30 °C with 60 % (by volume) solvent enabled obtaining a richer extract. All extracts had antioxidant activities against DPPH (13.0–80.0 %), superoxide (35.2–63.2 %) and peroxyl (89.3–99.5 %) radicals, but the use of hydrolysed extracts considerably improved the antioxidant activities. Antimicrobial activities only of the hydrolysed extracts of Brassica oleracea var. capitata were detected. It was confirmed that antioxidant activity of vegetable extracts can be considerably increased when hydrolysis is applied as a pretreatment to their extraction.

*Corresponding author:  
                                        +55 55 3220 8870


Search FTB

Follow us

 facebook 1 twitter bird_icon LI In Bug


Environmental Policy

sdg publishers compact 4 300x300

QR Code


We use cookies to improve our website and your experience when using it. Cookies used for the essential operation of the site have already been set. To find out more about the cookies we use and how to delete them, see our privacy policy.

I accept cookies from this site.

EU Cookie Directive Module Information