Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/15075
Título: Optimization and comparison of maceration and microwave extraction systems for the production of phenolic compounds from Juglans regia L. for the valorization of walnut leaves
Autor: Vieira, Vanessa
Prieto, M.A.
Barros, Lillian
Coutinho, João A.P.
Ferreira, Olga
Ferreira, Isabel C.F.R.
Data: 2017
Citação: Vieira, Vanessa; Prieto, M.A.; Barros, Lillian; Coutinho, João A.P.; Ferreira, Olga; Ferreira, Isabel C.F.R. (2017) - Optimization and comparison of maceration and microwave extraction systems for the production of phenolic compounds from Juglans regia L. for the valorization of walnut leaves. Industrial Crops & Products. ISSN 0926-6690. 107, p. 341-352
Resumo: This study compares maceration (ME) and microwave assisted (MAE) extractions aiming to maximize the extraction of valuable compounds from Juglans regia L. leaves. An experimental design, assisted by response surface methodology, was developed to optimize the variables of the ME and MAE systems (time, temperature and ethanol-water proportion). The responses used as criteria were the quantification by HPLC-DAD (3-O-caffeoylquinic acid, quercetin 3-O-glucoside and quercetin O-pentoside), the extraction yield and the spectrophotometric results of total phenolics and flavonols. The global optimum conditions were: 112.5 min, 61.3 °C and 50.4% of ethanol for ME; and 3.0 min, 107.5 °C and 67.9% of ethanol for MAE. The solid/liquid ratio effect was studied at the optimal values showing a decreasing linear relation until 140 g/L for all criteria assessed. This study contributes to the valorization of walnut leaves as source of valuable compounds (e.g., quercetin) to be used as ingredients for the development of functional foods.
Peer review: yes
URI: http://hdl.handle.net/10198/15075
DOI: 10.1016/j.indcrop.2017.06.012
ISSN: 0926-6690
Aparece nas colecções:CIMO - Artigos em Revistas Indexados à WoS/Scopus

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
41.pdf573,81 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.