Antioxidant Activity of Novel Casein-Derived Peptides with Microbial Proteases as Characterized via Keap1-Nrf2 Pathway in HepG2 Cells.

Casein-derived antioxidant peptides by using microbial proteases have gained increasing attention. Combination of two microbial proteases, Protin SD-NY10 and Protease A "Amano" 2SD, was employed to hydrolyze casein to obtain potential antioxidant peptides that were identified by LCMS/ MS, chemically synthesized and characterized in a oxidatively damaged HepG2 cell model. Four peptides, YQLD, FSDIPNPIGSEN, FSDIPNPIGSE, YFYP were found to possess high 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging ability.

Characterization and ACE Inhibitory Activity of Fermented Milk with Probiotic K25 as Analyzed by GC-MS-Based Metabolomics Approach.

Addition of probiotics to yogurt with desired health benefits is gaining increasing attention. To further understand the effect of probiotic on the quality and function of fermented milk, probiotic fermented milk (PFM) made with probiotic K25 and yogurt starter ( ssp. and ) was compared with the control fermented milk (FM) made with only the yogurt starter.

Study of colloidal particle Brownian aggregation by low-coherence fiber optic dynamic light scattering.

The aggregation kinetics of particles in dense polystyrene latex suspensions is studied by low-coherence fiber optic dynamic light scattering. Low-coherence fiber optic dynamic light scattering is used to measure the hydrodynamic radius of the aggregates. The aggregation kinetics data obtained can be fitted into a single exponential function, which is the characteristic of slow aggregation.