Red cabbage is rich in phytochemical compounds, and its consumption, either raw or cooked, has been linked to the prevention of several diseases. This work aimed to investigate the in uence of cooking methods on in vitro bioaccessibility of phenolics and antioxidant activity of red cabbage. The vegetable was subjected to boiling, steaming, and microwaving for different times to evaluate color parameters, total phenolic (TPC), total avonoid (TFC), anthocyanin content (AC), and antioxidant activity (FRAP, DPPH, and ABTS). The phytochemical bioaccessibility before and after cooking was also evaluated by in vitro simulated digestion. Steaming showed the most signi cant retention of the compounds after 20 and 25 minutes of cooking (72-86% for TPC, 72-77% for TFC, 75-79% for FRAP, 84-91% for DPPH, 70-83% for ABTS), followed by microwaving, which was more stable in 10 minutes. Microwaving decreased TFC and AC over time. Boiling did not show signi cant differences between the cooking times and showed more than 50% of losses of TPC, TFC, and AC and 30 to 60% of antioxidant activity. Steaming was the best cooking method, showing the most signi cant tendency to black coloration (< L*). In 10 minutes, it still showed the highest percentages of increase in TPC and the minor losses of TFC and AC in the gastric and intestinal phases. Steaming also increased the antioxidant after digestion when compared to uncooked red cabbage. These results are important to help consumers choose the most effective cooking method for red cabbage to retain its health-promoting components.
O presente material tem como objetivo sugerir um roteiro para guiar o pesquisador no planejamento de Revisão de Escopo e Revisão Sistemática na área de alimentos. A metodologia seguiu o protocolo sugerido pela Cochrane Handbook for Systematic Reviews of Interventions e pelo Joanna Briggs Institute. Esta ferramenta pretende auxiliar na melhoria da qualidade metodológica das revisões na área de alimentos, ao padronizar o método aplicado e buscar maior reflexão sobre o tema de estudo.
Objective: To investigate the opinion of family farmers about the supply of organic food to the National School Feeding Program (PNAE) in the state of Paraná, Brazil. Method: The convenience sample consisted of 44 family farmers from nine cooperatives and associations located in eight different mesoregions of the state of Paraná that supplied organic food to the PNAE. An online survey was conducted to evaluate the farmers' opinion on possible changes in the cooperatives' revenue and organization; diversification and production increase; difficulties in commercialization; increase in income, and improvement in food consumption after supplying to the PNAE. Results: According to the farmers’ opinion, there was better organization (100%) and an increase in the cooperatives' revenue and production (86.36%), after supplying to the PNAE. 75% of the farmers diversified their crops and 52.3% reported an increase of up to 25% in their family income. In addition, it was reported a better acceptance of the school feeding, diversification in the family's diet, improved self-esteem, closeness between producers and consumers, and the return of family members to the rural property. Conclusion: In the opinion of family farmers, PNAE has been fulfilling its role as a promoter of Food and Nutritional Security in the development of healthy habits, besides contributing to the increase in family income and promoting local sustainable development, following the World Health Organization's agenda.
Red cabbage is rich in phytochemical compounds, and its consumption, either raw or cooked, has been linked to the prevention of several diseases. This work aimed to investigate the influence of cooking methods on in vitro bioaccessibility of phenolics and antioxidant activity of red cabbage. The vegetable was subjected to boiling, steaming, and microwaving for different times to evaluate color parameters, total phenolic (TPC), total flavonoid (TFC), anthocyanin content (AC), and antioxidant activity (FRAP, DPPH, and ABTS). The phytochemical bioaccessibility before and after cooking was also evaluated by in vitro simulated digestion. Steaming showed the most significant retention of the compounds after 20 and 25 minutes of cooking (72-86% for TPC, 72-77% for TFC, 75-79% for FRAP, 84-91% for DPPH, 70-83% for ABTS), followed by microwaving, which was more stable in 10 minutes. Microwaving decreased TFC and AC over time. Boiling did not show significant differences between the cooking times and showed more than 50% of losses of TPC, TFC, and AC and 30 to 60% of antioxidant activity. Steaming was the best cooking method, showing the most significant tendency to black coloration (< L*). In 10 minutes, it still showed the highest percentages of increase in TPC and the minor losses of TFC and AC in the gastric and intestinal phases. Steaming also increased the antioxidant after digestion when compared to uncooked red cabbage. These results are important to help consumers choose the most effective cooking method for red cabbage to retain its health-promoting components.
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