| Texto completo | |
| Autor(es): |
Preczenhak, Ana Paula
[1]
;
Orsi, Bruna
[1]
;
Lima, Giuseppina P. Pereira
[2]
;
Tezotto-Uliana, V, Jaqueline
;
Minatel, Igor Otavio
[2]
;
Kluge, Ricardo Alfredo
[3]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Dept Biol Sci, Escola Super Agr Luiz de Queiroz, Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[2] Sao Paulo State Univ, Inst Biosci, Dept Chem & Biochem, BR-18618000 Botucatu, SP - Brazil
[3] Tezotto-Uliana, Jaqueline, V, Univ Sao Paulo, Dept Biol Sci, Escola Super Agr Luiz de Queiroz, Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Food Chemistry; v. 286, p. 600-607, JUL 15 2019. |
| Citações Web of Science: | 1 |
| Resumo | |
This study investigated the effectiveness of cysteine in conservation of bioactive compounds and the antioxidant capacity of minimally processed red beet. After red beet minimal processing increasing cysteine concentrations were applied, corresponding to control, 2 mM, 4 mM, 8mM and 16 mM. Assay was performed over 15 d to evaluate the polyphenols, betalains, antioxidant capacity and enzymatic activity of polyphenol oxidase (PPO) and phenylalanine ammonia lyase (PAL). Cysteine enhanced the gallic acid, caffeic acid, chlorogenic acid, kaempferol and betalain contents until 6 d of storage. Subsequently, dosages of cysteine above 4mM maintained gallic acid, kaempferol and betalains contents. Cysteine appears to influence the phenylpropanoid pathway, favoring the accumulation of polyphenols and betalains. In red beet, cysteine did not inhibit PPO activity but enhanced PAL activity. Betalains contribute more than phenolics to the antioxidant capacity, and their relationship with cysteine has not been thoroughly elucidated to date. (AU) | |
| Processo FAPESP: | 16/01201-8 - Avaliação de perdas qualitativas de beterraba em função do processamento mínimo e aplicação de aditivos visando sua redução |
| Beneficiário: | Ricardo Alfredo Kluge |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |