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EnglishAs condicoes de extracao sao um fator importante no processo de obtencao de compostos bioativos da matriz vegetal. Estes compostos diferem-se estruturalmente. As estruturas de fito conjugacoes e suas interacoes com outros ingredientes alimentares nao sao totalmente conhecidas, enquanto esses dois aspectos devem desempenhar um papel significativo na escolha de extracoes e na determinacao das condicoes do processo de extracao. A amoreira (Morus alba) e uma planta que cresce na Asia, cujos frutos sao ricos em ingredientes bioativos e com alto potencial antioxidante. Em nosso estudo, analisamos extratos de frutos de amoreira diferindo no extraente aplicado: acetona, metanol, etanol e agua. Todos os extratos testa dos possuiam composicao polifenolica rica e capacidade de eliminacao de radicais livres. As diferencas significativas entre os extratos em composicoes de acidos fenolicos e flavonoides foram observadas, em que os maiores valores foram observados para o extrato de acetona. O extraente aplicado afeta tambem o perfil antioxidante das amostras testadas. A maior atividade de eliminacao contra o ABTS foi observada para a acetone e etanol extracao, enquanto a atividade mais pobre tinha agua. Resultados semelhantes foram fornecidos para teste de reducao de ions ferrosos e atividade de aglutinacao de Fe (acetona>etanol>metanol>agua). Estes resultados sao uteis na selecao de solventes com composicoes apropriadas de compostos bioativos e altos perfis fitoquimicos para serem usados como ingredientes em suplementos, bem como em alimentos funcionais. portuguesExtraction conditions are an important factor in the process of obtaining bioactive compounds from plant matrix. These compounds differ structurally. Structures of phyto-compounds and their interactions with other food ingredient are not fully known, while these two aspects should play a significant role in extrahents choice and determination of extraction process conditions. Mulberry (Morus alba) is a plant growing in Asia, which fruits are rich in bioactive ingredients and high anti-oxidative potential. In our study we analyzed mulberry fruits extracts differing in the extra hent applied: acetone, methanol, ethanol and water. All tested extracts possessed rich polyphenolic composition and radical scavenging ability. The significant differences among the extracts in phenolic acids and flavonoids compositions were noticed, where the highest values were observed for acetone extract. The extrahent applied affects the antioxidative profile of tested samples, as well. The highest scavenging activity against ABTS was observed for acetone and ethanol extracts, while the poorest activity had water extract. Similar results were provided for ferrous ion reducing test and Fe chlating activity (acetone>ethanol>methanol>water). These results are helpful when selecting solvents with appropriate bioactive compounds compositions and high phytochemical profiles to be used as ingredients in supplements, as well as in functional foods

Antioxidant potential of various solvent extract from Morus alba fruits and its major polyphenols composition