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Food Chem ; 339: 127882, 2021 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-32889131

RESUMO

Unconventional parts of vegetables represent a rich source of health-promoting phytochemicals. The phenolic profile of cabbage-stalk flour (CSF), pineapple-crown flour (PCF), and their essential oils were characterized via UPLC-ESI-QTOF-MSE and GC-FID/MS. Antimicrobial activity was tested against five strains, and antioxidant activities were determined in free and bound extracts. Globally, 177 phenolics were tentatively identified in PCF (major p-coumaric acid, ferulic acid, and 4-hydroxybenzaldehyde) and 56 in CSF (major chlorogenicacid, quercetin 3-O-glucuronide, and p-coumaric acid). PCF exhibited a distinguished profile (lignans, stilbenes) and antioxidant capacity, especially in bound extracts (1.3 g GAE.100 g-1; 0.6 g catechin eq.100 g-1; DPPH: 244.7; ABTS: 467.8; FRAP: 762.6 µg TE.g-1, ORAC: 40.9 mg TE.g-1). The main classes of volatile compounds were fatty acids, their esters, and terpenes in CSF (30) and PCF (41). A comprehensive metabolomic approach revealed CSF and PCF as a promising source of PC, showing great antioxidant and discrete antimicrobial activities.


Assuntos
Ananas/química , Anti-Infecciosos/análise , Antioxidantes/química , Brassica/química , Farinha/análise , Fenóis/química , Compostos Orgânicos Voláteis/química , Ananas/metabolismo , Anti-Infecciosos/farmacologia , Brassica/metabolismo , Cromatografia Líquida de Alta Pressão , Análise Discriminante , Cromatografia Gasosa-Espectrometria de Massas , Bactérias Gram-Negativas/efeitos dos fármacos , Bactérias Gram-Positivas/efeitos dos fármacos , Óleos Voláteis/análise , Óleos Voláteis/química , Fenóis/análise , Fenóis/farmacologia , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Análise de Componente Principal , Espectrometria de Massas por Ionização por Electrospray , Compostos Orgânicos Voláteis/análise
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