Vitamin C and Phenolic Antioxidants of Jua (Ziziphus joazeiro M.) Pulp: A Rich Underexplored Brazilian Source of Ellagic Acid Recovered by Aqueous Ultrasound-Assisted Extraction

Molecules

Fereidoon Shahidi¹  Renan Danielski¹  Thaís Silva da Rocha²  Alessandro de Lima³  Jurandy do Nascimento Silva³  Adriano Costa de Camargo⁴  Rosana Aparecida Manólio Soares Freitas⁵  Elizabeth Aparecida Ferraz da Silva Torres⁵  Geni Rodrigues Sampaio⁵ 

[1] Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1C 5ST, Canada;Department of Nutrition, Universidade Federal do Piauí-UFPI, Teresina 64049-550, PI, Brazil;Instituto Federal de Educação, Ciência e Tecnologia do Piauí-IFPI-Zona Sul, Teresina 64000-040, PI, Brazil;Nutrition and Food Technology Institute, University of Chile, Santiago 7830490, Chile;School of Public Health, Universidade de São Paulo—USP, São Paulo 01246-904, SP, Brazil;

关键词: polyphenols;    ellagic acid;    gallic acid;    ultrasound-assisted extraction;    underexplored fruits;   

DOI  :  10.3390/molecules27030627

来源: DOAJ

【 摘 要 】

Jua (juá in Portuguese) is an underexplored fruit from Brazil’s northeast. This fruit is rich in antioxidant substances. However, there is a dearth of information about jua’s bioactive potential. The present study evaluated two extraction methods (continuous agitation and ultrasound-assisted extraction—UAE) and employed three different solvents (water, ethanol, and acetone) to efficiently recover soluble phenolic compounds. Aqueous extracts obtained by UAE showed the highest total phenolic content (TPC) and antiradical activity. Besides being an eco-friendly procedure, extraction and/or solubility in an aqueous medium is also important for food application. Ellagic acids were the predominant phenolics (80%) found in aqueous jua pulp extract obtained by UAE, as determined by HPLC, while its TPC was 405.8 gallic acid equivalent per gram of fruit. This extract also exhibited a higher scavenging activity towards peroxyl radicals when compared to that of several other fruits from the literature, including grape, strawberry, cranberry, and walnuts, which are known references in terms of antioxidants. This is the first report that demonstrates jua pulp’s potential as an alternative source of ellagic acid and other phenolic acids and flavonoids. Therefore, the outcome of this study provides new information that can be useful for functional food and nutraceutical industries.

【 授权许可】

Unknown