Improvement of antioxidant activity of peptides with molecular weights ranging from 1 to 10kDa by PEF technology

Optimized PEF treatment for antioxidant polypeptides with MW 10–30kDa and preliminary analysis of structure change

“…The similar tendency has been reported previously [13]. These results may be from the effects of polarization of the protein molecule and polarized structures, which tend to attract each orther by electrostatic forces [28,29]. Therefore, a PEF electric field intensity of 10 kV/cm was used in the following experiments.…”

“…However, when the frequency was increased from 2000 to 2700 Hz. Based on previous studies of PEF processing on food preservation and extraction, a high increase of pulse duration and frequency was shown to cause changes of the structure of cell membranes and protection of some nutrients in large molecules [28,29]. In this study, the increase of pulse frequency slightly improved the antioxidant activity of polypeptides.…”

Effects on functional groups and zeta potential of SAP1<MW<3kDatreated by pulsed electric field technology

“…Several studies investigating the effects of applied pulsed electric field (PEF) technology on antioxidant activity have been reported . Previous reports indicated that the antioxidant peptides derived from PEF‐treated egg white showed a significant improvement in reducing power ability within 5 h ( P < 0.05), as well as the antioxidant activity of polypeptides under the optimized conditions.…”

Analysis of DPPH inhibition and structure change of corn peptides treated by pulsed electric field technology

“…In our study, the improvement of DPPH inhibition of CPS treated by PEF was researched. Optimal conditions for PEF using response surface methodology (RSM) have been published previously (Wang et al 2012a). RSM is an effective statistical technique for optimizing complex processes.…”