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EnglishThe waste in the fruit production chain, including the juice and pulp industries, produces large quantities of leftover husks, seeds and bagasse. This volume of waste generates huge environmental and economic impact. The objective of this research was to determine the potential of using residues from passion fruit (Passiflora edulis) and apple (Malus domestica) varieties in the production of functional flours. Passion fruit flour showed greater reduction of DPPH (EC50%: 50.4μg/mL) radicals, showing antioxidant potential, as well as a more efficient inhibition of Staphylococcus aureus (71.3±1.2μg/mL), with a modest; however efficient, inhibition of acetylcholinesterase (10%). All Apple flours were good antioxidants and the fuji apple flour stood out inhibiting Pseudomonas aeruginosa (78.6±3.1μg/mL). All the residues showed potential for use as a functional product either as a source of antioxidants, a natural (antimicrobial) preservative for dry foods or supplementary use by patients with Alzheimer’s disease. Key words: Acetylcholinesterase; agroindustrial residues; antioxidant; natural preservative portuguesO desperdicio na cadeia produtiva de frutos, incluindo as industrias de suco e polpa, produz grandes quantidades de residuos, como cascas, sementes e bagacos. Esse volume de residuos gera impacto ambiental e economico. O objetivo deste trabalho foi determinar o potencial de aproveitamento de residuos de maracuja (Passiflora edulis) e de variedades de maca (Malus domestica) na producao de farinhas funcionais. A farinha de maracuja apresentou maior reducao de radicais DPPH (EC50%: 50,4μg/mL), demonstrando potencial antioxidante, maior inibicao de Staphylococcus aureus (71,3±1,2μg/mL) e da acetilcolinesterase (10%). Todas as farinhas de maca foram boas antioxidantes e a fuji destacou-se inibindo Pseudomonas aeruginosa (78,6±3,1μg/mL). Todos os residuos mostraram potencial para aproveitamento como produto funcional, seja como fonte de antioxidantes, conservante natural (antimicrobiano) para alimentos secos ou uso suplementar no tratamento de Alzheimer. Palavras-chave: Acetilcolinesterase; antioxidantes; conservante natural; residuos agroindustriais

Passion fruit and apple: from residues to antioxidant, antimicrobial and anti-Alzheimer’s potential