title: Bioactive compounds and phenolic-linked functionality of powdered tropical fruit residues.
abstract: Tropical fruit residues consisting of seeds, peels and residual pulp generated as by-products of fruit processing industry were investigated for bioactive compounds, the in vitro antioxidant capacity as well as alpha-glucosidase and alpha-amylase inhibitory activities. Cyanidin, quercetin, ellagic acid (EA) and proanthocyanidins were found in acerola, jambolan, pitanga and cajá-umbu residue powders. Acerola powder had the highest phenolic content (8839.33 mg catechin equivalents (CE)/100 g) and also high-ascorbic acid (AA) concentration (2748.03 mg/100 g), followed by jambolan and pitanga. The greatest 1,1-Diphenyl-2-picrylhydrazyl (DPPH) inhibition was observed for jambolan (436.76 mmol Trolox eq/g) followed by pitanga (206.68 mmol Trolox eq/g) and acerola (192.60 mmol Trolox eq/g), while acerola had the highest ferric reducing antioxidant power (FRAP) assay result (7.87 mmol Trolox eq/g). All fruit powders exhibited enzymatic inhibition against alpha-amylase (IC50 ranging from 3.40 to 49.5 mg CE/mL) and alpha-glucosidase (IC50 ranging from 1.15 to 2.37 mg CE/mL). Therefore, acerola, jambolan and pitanga dried residues are promising natural ingredients for food and nutraceutical manufacturers, due to their rich bioactive compound content.
authors.affiliation: Department of Chemical Engineering, Federal University of Rio Grande do Norte, Campus Lagoa Nova, Natal, Brazil. roberta@eq.ufrn.br
authors.forename: Roberta T P
authors.initials: RT
authors.lastname: Correia
authors.forename: Kátia C
authors.initials: KC
authors.lastname: Borges
authors.forename: Maria F
authors.initials: MF
authors.lastname: Medeiros
authors.forename: Maria I
authors.initials: MI
authors.lastname: Genovese
mesh_terms: D027926:Anacardiaceae / Q000737:chemistry*; D000975:Antioxidants / Q000008:administration & dosage / Q000032:analysis* / Q000191:economics / Q000494:pharmacology; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000032:analysis / Q000191:economics; D001938:Brazil; D002392:Catechin / Q000008:administration & dosage / Q000032:analysis / Q000191:economics; D019587:Dietary Supplements / Q000191:economics; D004791:Enzyme Inhibitors / Q000008:administration & dosage / Q000032:analysis / Q000191:economics / Q000494:pharmacology; D005511:Food Handling; D005527:Food, Fortified / Q000191:economics; D005525:Food-Processing Industry / Q000191:economics; D005638:Fruit / Q000737:chemistry* / Q000191:economics; D038321:Glycemic Index; D065089:Glycoside Hydrolase Inhibitors; D007220:Industrial Waste / Q000032:analysis / Q000191:economics; D029581:Malpighiaceae / Q000737:chemistry*; D027822:Myrtaceae / Q000737:chemistry*; D010636:Phenols / Q000008:administration & dosage / Q000032:analysis* / Q000191:economics / Q000494:pharmacology; D019441:Plant Epidermis / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D000516:alpha-Amylases / Q000037:antagonists & inhibitors
chemical_list: D000975:Antioxidants; D004791:Enzyme Inhibitors; D065089:Glycoside Hydrolase Inhibitors; D007220:Industrial Waste; D010636:Phenols; D002392:Catechin; D000516:alpha-Amylases; D001205:Ascorbic Acid