Participation in the XVIII Scientific poster session for young scientists, PhD students and students in UCTM – Sofia

On June 25, 2021, the University of Chemical Technology and Metallurgy held for the eighteenth time a Scientific Poster Session for young scientists, PhD students and students. This year’s edition was attended by 138 young scientists, doctoral students and students with 144 posters in 9 different scientific fields. The team took part with the development of the topic: “Biological activity of clove oil”.


Снимка: ХТМУ



Yoana Stoyanova*, N. Georgieva*, N. Lazarova-Zdravkova*, D. Tsanova*, D. Peshev**
*Department of Biotechnology, Faculty of Chemical and System Engineering, UCTM, Sofia, Bulgaria
**Department of Chemical Engineering, UCTM, Sofia, Bulgaria

The clove essential oil isolated from the buds of the species Eugenia caryophyllata (Myrtaceae) also found in the literature as Syzygium aromaticum is widely used and widely known for its healing properties. Clove oil has a number of benefits, ranging from anti-inflammatory for oral infections to treating toothache and acne. Due to its widespread use in the pharmaceutical, flavoring and food industries, demand for clove oil is expected to increase to 6000 tonnes by 2022.

The aim of this work is to study the antibacterial and antioxidant activity of clove oil. Gram-negative Escherichia coli K12 407 and Gram-positive Bacillus subtilis 3562 bacterial strains were used to study the inhibitory ability of the clove oil. The agar-diffusion method was used to test the susceptibility of the bacteria when treated with the clove oil. Antioxidant activity was determined spectrophotometrically using the DPPH method.

Acknowledgements: This work was supported by the Bulgarian National Science Fund (contract KP-06-H37/14)

Correspondence author: Yoana Stoyanova (

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