In Vitro Antioxidant Properties of Lactobacillus gasseri Isolated from Fermented Milk: Isolation and Preparation of Strains and Intracellular Cell-Free Extracts, Chemical Testing (Hydrogen Peroxide, Superoxide, Hydroxyl Radical, DPPH, Ferrous Ion Chelati. (2025). Indonesian Journal of Science and Technology, 9(3), 611-622. https://ejournal.kjpupi.id/index.php/ijost/article/view/391