SciELO - Scientific Electronic Library Online

Research evaluates water demand of vines in protected cultivation author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Ciência Rural

Print version ISSN 0103-8478

Cienc. Rural vol.45 no.2 Santa Maria Feb. 2015


Press Release

Pitaya peels is promising source of betalains

Edna Regina Amante

Researchers from the Federal University of Paraná, the Federal Technological University of Paraná and from the Federal University of Santa Catarina, Brazil, have shown that pitaya peels can be promising source of betalains. The study was published in Ciência Rural journal, v.45, of February 2015.

The aim of the study was to quantify the phenolic compounds, antioxidant activity and betalains in pitaya peels. The researchers also evaluated the stability of betalains in different conditions of pH and of heat exposure. Besides presenting phenolic compounds and antioxidant activity, the results showed that the peel of the pitaya has a high concentration of betalains (101,04mg equivalent betanin 100g-1) which were stable over a wide pH range (3, 2 to 7.0) and resistant to heating (100°C) for up to 10 minutes in a pH range from 3.7 to 5.5.

For the researcher Edna Regina Amante, the study of the stability of betalains of pitaya peels at different pHs and temperatures can be the basis for future applications of this waste. "In practice, the fruit peels can be used as substitutes for synthetic pigments, which would be an important application for this waste," she says.

Researcher: Edna Regina Amante E-mail:

Creative Commons License This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.