title: Artificial neural network modelling of the antioxidant activity and phenolic compounds of bananas submitted to different drying treatments.
abstract: Bananas (cv. Musa nana and Musa cavendishii) fresh and dried by hot air at 50 and 70°C and lyophilisation were analysed for phenolic contents and antioxidant activity. All samples were subject to six extractions (three with methanol followed by three with acetone/water solution). The experimental data served to train a neural network adequate to describe the experimental observations for both output variables studied: total phenols and antioxidant activity. The results show that both bananas are similar and air drying decreased total phenols and antioxidant activity for both temperatures, whereas lyophilisation decreased the phenolic content in a lesser extent. Neural network experiments showed that antioxidant activity and phenolic compounds can be predicted accurately from the input variables: banana variety, dryness state and type and order of extract. Drying state and extract order were found to have larger impact in the values of antioxidant activity and phenolic compounds.
authors.affiliation: Polytechnic Institute of Viseu, Research Centre CI&DETS/Dep. Food Industry, Quinta da Alagoa, Estrada de Nelas, Ranhados, 3500-606 Viseu, Portugal. Electronic address: raquelguine@esav.ipv.pt.
authors.forename: Raquel P F
authors.initials: RP
authors.lastname: Guiné
authors.affiliation: Polytechnic Institute of Coimbra, ISEC, DEQB, Rua Pedro Nunes, Quinta da Nora, 3030-199 Coimbra, Portugal. Electronic address: mjbarroca@gmail.com.
authors.forename: Maria João
authors.initials: MJ
authors.lastname: Barroca
authors.affiliation: Polytechnic Institute of Viseu, Research Centre CI&DETS/Dep. Food Industry, Quinta da Alagoa, Estrada de Nelas, Ranhados, 3500-606 Viseu, Portugal. Electronic address: fgoncalves@esav.ipv.pt.
authors.forename: Fernando J
authors.initials: FJ
authors.lastname: Gonçalves
authors.affiliation: Polytechnic Institute of Viseu, Dep. Food Industry, Quinta da Alagoa, Estrada de Nelas, Ranhados, 3500-606 Viseu, Portugal. Electronic address: mgalves.2100@gmail.com.
authors.forename: Mariana
authors.initials: M
authors.lastname: Alves
authors.affiliation: Polytechnic Institute of Viseu, Dep. Food Industry, Quinta da Alagoa, Estrada de Nelas, Ranhados, 3500-606 Viseu, Portugal. Electronic address: sol_10890@hotmail.com.
authors.forename: Solange
authors.initials: S
authors.lastname: Oliveira
authors.affiliation: Polytechnic Institute of Coimbra - ESTGOH/Institute of Systems and Robotics of the University of Coimbra, Department of Electrical and Computer Engineering, University of Coimbra, Pinhal de Marrocos - Polo II, 3030 Coimbra, Portugal. Electronic address: mmendes@isr.uc.pt.
authors.forename: Mateus
authors.initials: M
authors.lastname: Mendes
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D003890:Desiccation / Q000379:methods; D028521:Musa / Q000737:chemistry*; D016571:Neural Networks, Computer; D010636:Phenols / Q000032:analysis*; D010936:Plant Extracts / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D010636:Phenols; D010936:Plant Extracts
keywords: Antioxidant activity; Banana; Drying; Neural network; Phenolic compounds