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Date Plum (Diospyros Lotus) has high health-promoting properties which they are mainly attributed to its available bioactive compounds. In present study, antioxidant and antibacterial properties of the date plum syrup was investigated and the extract compounds identified by Gas Chromatography Mass Spectrometry (GC-MS). Total phenolic and flavonoid contents and antioxidant activity of the extracts were measured. Antimicrobial activity was performed on four bacteria by disc diffusion method. The research results indicated high total phenolic and flavonoid contents of the date plum extracts. Surveying antioxidant properties of date plum extract also implicate its high antioxidant properties. DPPH radical scavenging activity of date plum extract at concentrations of 800, 400, 200, 100 and 50 micrograms/milliliter has been 82% , 61.53%, 53.51%, 32.52%, 18.31%,  respectively. In investigation of antibacterial properties, the date plum syrup had high inhibiting effects on growth of different types such as Escherichia coli, Salmonella, Staphylococcus aureus and Bacillus cereus in high dilutions (50 and 100 mg/ml).. The date plum extract includes high amounts of sugar and functional components such as 5,5-Epoxymethano-2,2,6-trimethyl-7-oxabicyclo (17/77%), 2-Furancarboxaldehyde (17/01%) and 1-allyl-3-methylindole-2-carbaldehyde (11/2%).

Keywords: Date plum (Diospyros Lotus), antioxidant, antimicrobial, gas chromatography with mass spectrometry (GC-MS).

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