Showing papers by "Concepción Sánchez-Moreno published in 2005"

Impact of High Pressure and Pulsed Electric Fields on Bioactive Compounds and Antioxidant Activity of Orange Juice in Comparison with Traditional Thermal Processing

Abstract: Bioactive compounds (vitamin C, carotenoids, and flavanones) and DPPH• radical scavenging capacity (RSC) were measured in orange juice (OJ) subjected to different technologies. High pressure (HP) (400 MPa/40 °C/1 min), pulsed electric fields (PEF) (35 kVcm-1/750 μs), low pasteurization (LPT) (70 °C/30 s), high pasteurization (HPT) (90 °C/1 min), HPT plus freezing (HPT+F) (−38 °C/15 min), and freezing (F) were studied. Among the treatments assayed, even though the losses in total vitamin C were <9%, treatments with the higher temperatures tended to show the higher decrease in the content of both forms of vitamin C. HP treatment led to an increased (P < 0.05) carotenoid release (53.88%) and vitamin A value (38.74%). PEF treatment did not modify individual or total carotenoids content. Traditional thermal treatments did not exert any effect on total carotenoid content or vitamin A value. With regard to individual carotenoid extraction, HPT and HPT+F led to different releases of carotenoids. With respect to f...