an increasing trendP < 0.05
2 B, after adding CUR, the absolute potential value of the UP-CSPI complex showed an increasing trend ( P < 0.05), which was consistent with the research results of ( Ren et al., 2024 ), the absolute value of Zeta potential increased, the phenolic hydroxyl groups and other groups contained in CUR would partially dissociate during the pH shift process, causing CUR molecules to carry a certain amount of negative charge.