| dc.description.abstract | The present study aimed to extract the rhizomes essential oil of C. longa, C. aeruginosa, and
C. aromatic from Vietnam, determine its composition by gas chromatography and mass
spectrometry, and evaluate its antioxidant and antimicrobial activity. The oil extraction was
performed by hydrodistillation and gas chromatography-mass spectrometry identified its
composition. The antioxidant activity was evaluated through 2,2-diphenyl-1-picrylhydrazyl
DPPH assay, and the agar well diffusion was used for analyzing the antimicrobial activity.
The main constituents of essential oil from the fresh rhizome of C. longa included ar turmerone (38.381%), turmerone (24.173%), and curlone (16.227%). Besides, C. aromatic
was dominant in α-Zingiberene (12.94%), xanthorrhizol (19.256%), ar-Curcumene
(14.695%), camphor (12.982%). The black turmeric (C. aeruginosa) essential oil, on the
other hand, was rich in curzerenone (48.791%), Germacrene B (6.90%), α-Curcumene
(6.233%) as well as germacrone (13.930%) In antioxidant activity, The IC50 values of C.
longa, C. aeruginosa, C. aromatica were 74.767 ± 2.443, 87.870 ± 1.107, and 65.675 ± 2.506
μg/mL, respectively. The essential oils of C. longa, and C. aromatic showed antibacterial
activity against E. coli with an inhibition zone diameter of 20.0 and 9.0 mm. At the same
time, Curcuma aeruginosa was no inhibition zone in Escherichia coli. On the other hand, the
antibacterial activity of C longa, C aeruginosa, and C. aromatic against Bacillus subtills with
an inhibition zone diameter of 15, 21, and 17 mm, respectively | en_US |
