Colloidal gas aphrons based separation process for the purification and fractionation of natural phenolic extracts

Polyphenols extracted from red grape pomace by a surfactant based method show enhanced collagenase and elastase inhibitory activity

“…It is also important to highlight that some aggregates were observed in the CGA phase which did not completely solubilise during analysis, hence this would probably lead to an underestimation of the net recovery. Overall, the recovery results were in agreement with our previous work …”

“…In a previous work by our group, it was found that high recovery of polyphenols from grape ethanolic extracts could be obtained by CGA generated with the cationic surfactant Cetyl trimethylammonium bromide (CTAB) and the non‐ionic TWEEN20 . In the present work, ethanolic and hot water extracts were first obtained from grape pomace (see Fig.…”

“…The low ratio value of V LP /V CGA (i.e. low volume of liquid drained in relation to volume of CGA) was an indication of a stable CGA which might be due to the presence of other compounds (glucose and proteins) which could increase the viscosity of the liquid in the continuous phase and hence increase the stability of the CGA . It is also important to highlight that some aggregates were observed in the CGA phase which did not completely solubilise during analysis, hence this would probably lead to an underestimation of the net recovery.…”

“…Our group investigated a surfactant based extraction method, colloidal gas aphrons (CGA), for the separation of polyphenols from grape . CGA are microbubbles (10–100 µm) generated by intense stirring (>8000 rpm) of a surfactant solution above its critical micelle concentration.…”

Stirring-assisted dead-end ultrafiltration for protein and polyphenol recovery from purple sweet potato juices: Filtration behavior investigation and HPLC-DAD-ESI-MS2 profiling

“…During the last two decades, purifying polyphenols from natural plant extracts with more environmentally friendly and less energy costly methods has been intensively studied [9][10][11]. On the one hand, innovative technologies such as ultrasounds, high voltage electrical discharges and pulsed electric fields have been applied to obtain extracts with less impurities compared to conventional extraction methods, especially from plant food materials [12][13][14][15][16].…”