Data/hora: 06/06/2024 09:53:28

Provedor de dados: | 65
País: | Brazil
Título: | Blackberry (Rubus spp.): influence of ripening and processing on levels of phenolic compounds and antioxidant activity of the 'Brazos' and 'Tupy' varieties grown in Brazil
Autores: | Zielinski,Acácio Antonio Ferreira; Goltz,Caroline; Yamato,Maira Akemi Casagrande; Ávila,Suelen; Hirooka,Elisa Yoko; Wosiacki,Gilvan; Nogueira,Alessandro; Demiate,Ivo Mottin.
Data: | 2015-04-01
Ano: | 2015
Palavras-chave: | Rubus spp.; Antioxidant activity; Ripening stage; Processing.
Resumo: | Fruits from temperate and tropical climates which have high levels of antioxidant compounds are the source of numerous studies concerning the correlation with benefits to human health. The objectives of this study were to quantify the anthocyanins and phenolic compounds and also to measure the antioxidant activity (ferric reducing antioxidant power - FRAP) of blackberries from two varieties grown in southern Brazil ('Brazos' and 'Tupy') at three stages of ripening; unripe, semi-ripe, ripe and their products (pulp and fermented products). During fruit ripening it was observed that weight, size, diameter and sugars increase significantly and acidity decreased significantly. The anthocyanin content ranged from 4.19 (semi-ripe 'Tupy' variety) to 205.75mg 100g-1 (ripe 'Brazos' variety). The highest levels of phenolic compounds were observed for the unripe fruit of both varieties, while antioxidant activity showed no significant difference during the ripening stages. The studied pulp showed a high content of phenolic compounds (ten times higher than that found in the ripe fruits). The anthocyanin content and antioxidant activity did not show the same increase due to the degradation of anthocyanins caused by the heat treatment that was used. The alcoholic fermented beverage made from blackberries remained stable (total phenolic compounds and antioxidant activity) during two years of storage, but the in third year a significant reduction in antioxidant activity was observed. These results can be important for establishing the shelf life of this kind of product made with blackberry
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000400744
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20120715
Formato: | text/html
Fonte: | Ciência Rural  v.45 n.4 2015
Fonte: | info:eu-repo/semantics/openAccess