| WPHs | Wheat protein hydrolysates |
| PSPAs | Purple sweet potato anthocyanins |
| WPHs+PSPAs | Purple sweet potato anthocyanins solution with wheat protein hydrolysates added |
| BI | Brown indexes |
| PCI | Polymeric color indexes |
| AFM | Atomic force microscope |
| WPHs | Wheat protein hydrolysates |
| PSPAs | Purple sweet potato anthocyanins |
| WPHs+PSPAs | Purple sweet potato anthocyanins solution with wheat protein hydrolysates added |
| BI | Brown indexes |
| PCI | Polymeric color indexes |
| AFM | Atomic force microscope |