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

1. Vieira, V.
2. Prieto, M.A.
3. Barros, L.
4. Coutinho, J.A.P.
5. Ferreira, O.
6. Ferreira, I.C.F.R.