Abstract

• In this research work, the fruits of Trapa natans L., Myanmar name Kywe-gaung-thee were selected for determination of some nutritional values, minerals contents, total phenolic content, total flavonoid content, antimicrobial activity and antioxidant activity. The fruits of T. natans (Kywe-gaung-thee) were collected from Pathein-gyi Township, Mandalay Region, Myanmar. Firstly, some nutritional values of fruits of T. natans such as moisture, ash, pH, protein, fiber and fat were determined by AOAC method. The mineral contents were also determined by EDXRF technique. Moreover, the total phenolic content of fresh fruit of T. natans was measured by Folin – Ciocalteau reagent and total flavonoid content was measured by AlCl3 method with UV visible spectrophotometer. Furthermore, the antimicrobial activities of three solvent extracts of selected sample were tested by agar well diffusion method on six microorganisms such as Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus pumilus, Candida albicans and E.coli. In addition, the antioxidant activity of the ethanolic extract of selected sample was evaluated by DPPH (1,1- diphenyl-2- picryl hydrazyl) assay method.