Publicação
The chemistry and bioactive properties behind microalgae-enriched gluten-free breads
| Resumo: | This work aims to: (i) assess volatiles composition of microalgae-enriched gluten-free breads (prepared with Tetraselmis chuii, Chlorella vulgaris and Microchloropsis gaditana); (ii) report the bioaccessibility of protein and minerals after a static in vitro digestion model; (iii) understand how it affects the bioactive properties of gluten-free breads in regard to antioxidant capacity and the α-amylase inhibitory potential. Therefore, nutritional composition and bioactive properties of gluten-free breads before and after in vitro digestion model were examined. Identification of compounds responsible for the overall aroma of microalgae using GC–MS was done. There was a considerable decrease in protein and minerals available after in vitro digestion, as well as in the antioxidant potential. The overall aroma of microalgae-enriched breads was mainly due to the presence of alcohols, representing the major class of volatiles present in breads (3% to 59%), being lower for T. chuii-enriched bread. Terpenes also existed in considerable amounts especially in M. gaditana (24%) where γ-terpinene was the most abundant. Alkanoic acids were the most abundant lipophilic bioactive compounds (25%–68%), and 9,12-octadecadienoic acid was the major identified compound (13%–51%). Phytic acid is also present in all microalgae-enriched breads and may contribute to the decrease in the bioaccessibility of nutrients. |
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| Autores principais: | Freitas, Marco A. |
| Outros Autores: | Ferreira, Joana; Nunes, Maria Cristiana; Raymundo, Anabela |
| Assunto: | Bioaccessibility gluten-free bread in vitro digestibility lipophilics microalgae volatiles composition |
| Ano: | 2023 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | This work aims to: (i) assess volatiles composition of microalgae-enriched gluten-free breads (prepared with Tetraselmis chuii, Chlorella vulgaris and Microchloropsis gaditana); (ii) report the bioaccessibility of protein and minerals after a static in vitro digestion model; (iii) understand how it affects the bioactive properties of gluten-free breads in regard to antioxidant capacity and the α-amylase inhibitory potential. Therefore, nutritional composition and bioactive properties of gluten-free breads before and after in vitro digestion model were examined. Identification of compounds responsible for the overall aroma of microalgae using GC–MS was done. There was a considerable decrease in protein and minerals available after in vitro digestion, as well as in the antioxidant potential. The overall aroma of microalgae-enriched breads was mainly due to the presence of alcohols, representing the major class of volatiles present in breads (3% to 59%), being lower for T. chuii-enriched bread. Terpenes also existed in considerable amounts especially in M. gaditana (24%) where γ-terpinene was the most abundant. Alkanoic acids were the most abundant lipophilic bioactive compounds (25%–68%), and 9,12-octadecadienoic acid was the major identified compound (13%–51%). Phytic acid is also present in all microalgae-enriched breads and may contribute to the decrease in the bioaccessibility of nutrients. |
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