Advisor(s)
Abstract(s)
The recovery of bio-wastes to obtain high added value compounds is of great interest for the pharmaceutical,
medicinal and food industries. Therefore, the aerial parts of turnip (Brassica rapa L.), radish (Raphanus sativus L.)
and leaf blade of wild cardoon (Cynara cardunculus L. var. sylvestris (Lamk) Fiori) were characterized regarding
their nutritional composition, as also their content in soluble sugars, organic acids, fatty acids, and tocopherols.
Furthermore, their hydroethanolic extracts and infusion preparations, were profiled regarding individual phenolic
compounds by HPLC-DAD/ESI-MS and their antioxidant, antibacterial and hepatotoxic activities were
evaluated. Regarding the nutritional content, wild cardoon revealed the best results, however it was radish and
turnip that showed higher values for organic acids and phenolic compounds. The hydroethanolic extract and
infusion preparation of wild cardoon stood out for its antioxidant and antibacterial activity. Overall, the hydroethanolic
extracts seemed more effective (regarding antioxidant and antibacterial activity) than the infusions.
Total phenolic acids proved to be strongly correlated with the antioxidant and antibacterial (against Morganella
morganii) activities. This study showed that the discarded parts of these plants can be used as an important
natural source of valuable nutrient content and new and safe bioactive compounds, beneficial for human health.
Moreover, the extraction of those compounds from underused parts of turnip, radish and cardoon could be used
to preserve foods, avoiding artificial additives and thus, contributing to the development of new natural ingredients.
Description
Keywords
Antioxidant/antibacterial/hepatotoxic properties Brassica rapa L. Chemical/nutritional characterization Cynara cardunculus L. var. sylvestris Polyphenols Raphanus sativus L.
Pedagogical Context
Citation
Chihoub, Wiem; Dias, Maria Inês; Barros, Lillian; Calhelha, Ricardo C.; Alves, Maria José; Harzallah-Skhiri, Fethia; Ferreira, Isabel C.F.R. (2019). Valorisation of the green waste parts from turnip, radish and wild cardoon: Nutritional value, phenolic profile and bioactivity evaluation. Food Research International. ISSN 0963-9969. 126, p.