Improving bioactive compounds extractability of Amorphophallus paeonizfolius (Dennst.) Nicolson

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Costa, ASG (Author) Other; Barreira, JCM (Author) Other; Ruas, A (Author) Other; Vinha, AF (Author) Other; Pimentel, FB (Author) Other; Rita C. Alves (Author) FFUP; Ferreira, ICFR (Author) Other; Beatriz B P P Oliveira (Author) FFUP

Journal

Title: Industrial Crops and Products

Vol. 79

Pages: 180-187

ISSN: 0926-6690

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00K-09R

DOI: 10.1016/j.indcrop.2015.11.019

Abstract (EN): Elephant foot yam (Amorphophallus paeoniifolius (Dennst.) Nicolson) is an underground, unbranched deciduous plant that produces a large tubercle (rhizome) with recognized health effects. In this study, the influence of solvent nature (water, water/etanol (1:1) and absolute ethanol) and processing type (fresh, lyophilized and boiled) on the antioxidant activity and bioactive compounds extractability of elephant foot yam was evaluated. Extracts were compared for their contents in total phenolics, flavonoids and tannins. Moreover, their antioxidant capacity was assessed by the ferric reducing antioxidant power (FRAP) and the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH center dot) scavenging capacity assays. Phenolics (154 mg GAE/L) and tannins (109 mg GAE/L) were maximized in lyophilized samples extracted with the hydroalcoholic solvent, which attained also the highest FRAP value (711 mg FSE/L). In turn, flavonoids reached the highest yields in lyophilized samples (95 mg ECE/L) extracted with pure ethanol, as well as the highest DPPH center dot scavenging activity. These findings might have practical applications to define the best processing methodology regarding the enhancement of elephant foot yam, either for prompt consumption, as well as to develop food supplements or pharmaceutical related products.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8