ORN ANONG CHAIYACHET*, KANLAYANI CHAROENSOPHARAT AND WORACHAT TOKAEW
Division of Biotechnology, Faculty of Science and Technology, Rajabhat Maha Sarakham University, Talat, Mueang, Maha Sarakham, P. O. Box 44000, Thailand
*(e-mail: ornanong.ch@rmu.ac.th; Mobile: +66892767907)
(Received: July 20, 2023; Accepted: August 30, 2023)
ABSTRACT
This study was aimed at determining the curcumin content and antioxidant/antimicrobial activities of Curcuma longa Linn. (CL), Curcuma aromatic Salisb. (CA) and Zingiber purpureum Roscoe (ZP) powders. The alcohol and water soluble extractive values were estimated. The curcumin content was analyzed by high-performance liquid chromatography. The antioxidant activity was investigated by DPPH assay, and the antimicrobial activity was evaluated using the agar diffusion method. The alcohol-soluble extractive value of CL was the highest, while the water-soluble extractive value of CL was the lowest. The curcumin content was highest for CL, followed by CA and ZP. CL had the lowest IC50, indicating the highest antioxidant activity, which was strongly correlated with the curcumin content. The herbal powders showed no antibacterial activity against Propionibacterium acnes but exhibited antifungal activity against Trichophyton mentagrophytes. This study demonstrated the effective activity of the C. longa, C. aromatica and Z. purpureum powders which can be further applied in cosmetic products.
Key words : Antimicrobial, Curcuma aromatic, Curcuma longa, curcumin, Zingiber purpureum