Artículos de revistas
Effect Of Ultrasound On The Supercritical Co2 Extraction Of Bioactive Compounds From Dedo De Moca Pepper (capsicum Baccatum L. Var. Pendulum)
Registro en:
Ultrasonics Sonochemistry. Elsevier Science Bv, v. 31, p. 284 - 294, 2016.
1350-4177
1873-2828
WOS:000373419900034
10.1016/j.ultsonch.2016.01.013
Autor
Baiao Dias
Arthur Luiz; Arroio Sergio
Camilla Scarelli; Santos
Philipe; Barbero
Gerardo Fernandez; Rezende
Camila Alves; Martinez
Julian
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Extracts with bioactive compounds were obtained from the red pepper variety "dedo de moca" (Capsicum baccatum L. var. pendulum) through supercritical fluid extraction with carbon dioxide assisted by ultrasound (SFE-US). The process was tested at pressures of 15, 20 and 25 MPa; temperatures of 40, 50 and 60 degrees C, and ultrasonic powers of 200, 400 and 600 W applied during 40, 60 and 80 min of extraction. The CO2 mass flow rate was fixed at 1.7569 x 10(-4) kg/s. Global yield, phenolic content, antioxidant capacity and capsaicinoid concentration were evaluated in the extracts. The application of ultrasound raised the global extraction yield of SFE up to 45%. The phenolic content of the extract increased with the application of higher ultrasound power and radiation time. The capsaicinoid yield was also enhanced with ultrasound up to 12%. However, the antioxidant capacity did not increase with the ultrasound application. The BET-based model and the broken and intact cell model fitted well to the kinetic SFE curves. The BET-based model with three adjustable parameters resulted in the best fits to the experimental data. Field emission scanning electron microscopy (FESEM) images showed that SFE disturbed the vegetable matrix, releasing particles from the inner region of the plant cells to their surface. When the ultrasound was applied this effect was more pronounced. On the other hand, cracks, fissures or any sign of rupture were not identified on the sample surface. (C) 2016 Elsevier B.V. All rights reserved. 31 284 294 FAPESP [2013/02203-6] CNPq [147260/2013-2, 142373/2013-3] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)