Abstract
The Gulupa (Passiflora edulis f. edulis Sims) is an expression of South America’s tropics’ biodiversity, and a source of B vitamins and amino acids. It is a climacteric export fruit for which it is necessary to incorporate emerging technologies for its conservation and transport. This work investigated the effect of ultrasound on gulupa pulp and verified the stability of the characters of interest in the shelf life of 20 days. Six treatments and a control sample were used, evaluated in triplicate, and varied in frequency (30 and 40 kHz) with an exposure time of 10, 20, and 30 min. A statistical analysis of unidirectional variances and Dunnett’s test was used. It was found that the ultrasound treatments did not affect the pH or the titratable acidity. Soluble solid results presented a significant increase (p < 0.05) (from 13.4 to 14.8% w/v) in the antioxidant capacity (from 1.13 to 1.54 µmol Trolox Equivalent (TE)/g by the ABTS•+ (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) Cationic Radical Assay and from 3.3 to 3.7 µmol TE/g by the DPPH· (2,2-diphenyl-1-picrilhydrazil) Radical Scavenging Assay). During the shelf life, ascorbic acid was the parameter that varied most (p < 0.05). It decreased from 42.7 to 21.6 mg ascorbic acid/100 g of pulp in the control sample. However, a smaller decrease was observed (23.8–24.5 mg ascorbic acid/100 g of pulp) in the 40 kHz treatments. The smallest global color difference (ΔE) for the control was found in the 40 kHz treatment at 30 min through the entire shelf life (day 0 to 20). Ultrasound treatment offers a new strategy to improve and extend the shelf life of chilled gulupa pulp.
Highlights
Gulupa (P. edulis f. edulis), known as purple passion fruit, of the Passifloraceae family, is a climbing plant native to southern Brazil, Paraguay, and northern Argentina
Colombia has the most remarkable diversity of the genus Passiflora, among which P. edulis f. flavicarpa, P. edulis f. edulis, P. ligularis, and P. mollissima are the most desired in international markets
The fruits were cut in half to obtain the pulp, and the pulp, including the seeds, was extracted with a sterile spoon according to the procedure described by the Colombian technical standard
Summary
Gulupa (P. edulis f. edulis), known as purple passion fruit, of the Passifloraceae family, is a climbing plant native to southern Brazil, Paraguay, and northern Argentina. Edulis), known as purple passion fruit, of the Passifloraceae family, is a climbing plant native to southern Brazil, Paraguay, and northern Argentina. It is produced mainly in Brazil, followed by Venezuela, Colombia, and the rest of the tropical countries [1], from where it is mainly exported to the European Union. Its pulp is used to prepare juices and soft drinks. It has essential nutrients with antioxidant properties, such as vitamins, polyphenolic compounds, carotenoids, anthocyanins (cyanidin-3-O-β-Dglucopyranoside), and amino acids that make it attractive for consumption [4,5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
