Comparison of functional properties of tea protein in reverse micelles,alkali and enzymatic

To develop the utilization of tea residue protein,the effects of reverse micelle system CTAB- Tween80 on some functional properties of tea residue protein were investigated,compared with the effects of alkali- solution and acid- isolation as well as enzymatic method. The results showed that tea residue protein had the lowest solubility at p H4.0,then solubility had a rising trend with increasing p H. The oil absorption capacity and the water absorption capacity were 2.54 g / g and 1.78 g / g,respectively,while the foam stability was 59.30%. Besides,the emulsibility was 60.27% with reverse micelle system CTAB- Tween80 preparation,the number was 84.56% in terms of emulsion stability.And the foam capacity valued 68.69%.Tea residue protein with reverse micelle system CTABTween80 preparation can form gel. In summary,tea residue protein with reverse micelle system CTAB- Tween80 preparation showed excellent emulsibility,emulsion stability and foam capacity despite its slightly poorer performance in the oil absorption capacity,water holding capacity and foam stability test,in comparison with tea residue protein with either alkali- solution and acid- isolation or enzymatic method,so reverse micelle system can keep the tea residue protein functional properties better.