Development of probiotic drink yoghurt from Dillenia serrata thunb: antioxidant and antibacterial potencies

Nuralifah, . and Susilowati P.E., . and Parawansah, . and Ernisa A., . and Purnama, L.M.J. and Asasutjarit, R. and Fristiohady A., . (2022) Development of probiotic drink yoghurt from Dillenia serrata thunb: antioxidant and antibacterial potencies. Food Research (Malaysia), 6. pp. 124-129. ISSN 2550-2166

Yogurt is a functional drink that has been known to have health benefits. Yogurt has higher antioxidant activity than whole milk. This study aimed to determine the ability of antioxidant and antibacterial activity of Songi fruit extract yogurt. The antioxidant activity was assayed using DPPH (1,1-diphenyl-picrylhydrazyl) and the antibacterial activity using the agar diffusion method with the well-technique against Gram-negative bacteria Escherichia coli ATCC 35218. The test results of secondary metabolites of Songi fruit extract contain tannins, saponins, and flavonoids. The Songi fruit extract was formulated into 4 formulas, which were Formula I (0%), Formula II (10%), Formula III (15%), and Formula IV (20%). The results of the antioxidant activity test obtained with IC₅₀ values of formulas were 121, 75.38, 50.50, and 36.58 mg/mL respectively, and 84.82 mg/mL for commercial yogurt. Test results of antibacterial activity against bacteria E. coli ATCC 35218 with inhibition zone diameters were 0, 0, 1.5, and 3.5 mm, respectively for Formula I-IV, and the commercial yogurt was 0 mm. Formula IV (20% fruit extract yogurt) possessed the highest antioxidant and antibacterial activity with IC₅₀ 36.58 mg/mL and an inhibition zone diameter of 3.5 mm. In conclusion, the Songi fruit extract yogurt has antioxidant and antibacterial activity against E. coli.

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Abstract

Yogurt is a functional drink that has been known to have health benefits. Yogurt has higher antioxidant activity than whole milk. This study aimed to determine the ability of antioxidant and antibacterial activity of Songi fruit extract yogurt. The antioxidant activity was assayed using DPPH (1,1-diphenyl-picrylhydrazyl) and the antibacterial activity using the agar diffusion method with the well-technique against Gram-negative bacteria Escherichia coli ATCC 35218. The test results of secondary metabolites of Songi fruit extract contain tannins, saponins, and flavonoids. The Songi fruit extract was formulated into 4 formulas, which were Formula I (0%), Formula II (10%), Formula III (15%), and Formula IV (20%). The results of the antioxidant activity test obtained with IC₅₀ values of formulas were 121, 75.38, 50.50, and 36.58 mg/mL respectively, and 84.82 mg/mL for commercial yogurt. Test results of antibacterial activity against bacteria E. coli ATCC 35218 with inhibition zone diameters were 0, 0, 1.5, and 3.5 mm, respectively for Formula I-IV, and the commercial yogurt was 0 mm. Formula IV (20% fruit extract yogurt) possessed the highest antioxidant and antibacterial activity with IC₅₀ 36.58 mg/mL and an inhibition zone diameter of 3.5 mm. In conclusion, the Songi fruit extract yogurt has antioxidant and antibacterial activity against E. coli.

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Item Type:	Article
AGROVOC Term:	fruit extracts
AGROVOC Term:	fermentation
AGROVOC Term:	Escherichia coli
AGROVOC Term:	antioxidants
AGROVOC Term:	antibacterial plants
AGROVOC Term:	functional foods
AGROVOC Term:	tannins
AGROVOC Term:	saponins
AGROVOC Term:	flavonoids
Geographical Term:	Indonesia
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	05 Feb 2026 08:15
Last Modified:	05 Feb 2026 08:15
URI:	http://webagris.upm.edu.my/id/eprint/3342

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