Antimicrobial, Antioxidant Activities and Total Phenolic Contents of the Traditional Turkish Beverages Produced by Using Grapes

Authors

DOI:

https://doi.org/10.24925/turjaf.v7isp1.119-125.2774

Keywords:

grapes, hardaliye, traditional beverages, antimicrobial, antioxidant activity

Abstract

In the present study, antimicrobial effects of traditional beverages produced from grapes such as traditional grape pickles, grape juice, home-made hardaliye, and commercially produced hardaliye were investigated using microdilution method against Staphylococcus aureus ATCC 6538P, Escherichia coli ATCC 25922, Salmonella Typhimurium NRRL B4420, Bacillus cereus ATCC 10876, Saccharomyces cerevisiae NRRL Y-12632, Lactobacillus acidophilus La-5 and L. rhamnosus LGG. In addition, total phenolic content was measured by the Folin-Ciocalteau method, and antioxidant activities of grape products were evaluated using DPPH assay. Results showed that grape containing beverages have antimicrobial effects on S. aureus, E. coli, S. typhimurium and B. cereus at various minimum inhibitory concentration (MIC) values in the range of 4.53-150 mg/mL. The lowest MIC value of 4.53 mg/mL was obtained against E. coli for home-made hardaliye. MIC values of the traditional grape pickles were determined as 4.69 mg/mL and 9.38 mg/mL against S.aureus and E.coli, respectively. On the other hand, traditional grape pickles showed weak inhibitory effects against B.cereus with MIC value of 150 mg/mL. The bactericidal effect of these grape products was not detected for any of the test microorganisms however traditional foods produced by using grapes were showed inhibitory effects at different concentrations against tested microorganisms except for probiotics and the yeast. The total phenolic contents of the grape products were within the range of 865.27-2193.08 mg gallic acid equivalent (GAE)/L. Free radical scavenging activities of grape samples ranged from 46% to 90% and the grape juice was found to have the highest antioxidant activity. In conclusion, grape beverages have the potential to act as a antimicrobial and antioxidant agents for use as a natural antimicrobial and antioxidant product in the food industry.

Author Biographies

Gülten Tiryaki Gündüz, Department of Food Engineering, Faculty of Engineering, Ege University, Bornova, 35040 Izmir

Engineering Faculty, Food Enginering Department

Ayça Korkmaz, Department of Food Engineering, Faculty of Engineering, Ege University, Bornova, 35040 Izmir

Engineering Faculty, Food Enginering Department

Ezgi Solak, Department of Food Engineering, Faculty of Engineering, Ege University, Bornova, 35040 Izmir

Engineering Faculty, Food Enginering Department

Hande Didar Sözbir, Department of Food Engineering, Faculty of Engineering, Ege University, Bornova, 35040 Izmir

Engineering Faculty, Food Enginering Department

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Published

10.12.2019

How to Cite

Gündüz, G. T., Korkmaz, A., Solak, E., & Sözbir, H. D. (2019). Antimicrobial, Antioxidant Activities and Total Phenolic Contents of the Traditional Turkish Beverages Produced by Using Grapes. Turkish Journal of Agriculture - Food Science and Technology, 7(sp1), 119–125. https://doi.org/10.24925/turjaf.v7isp1.119-125.2774