Ljuboš Ušjak, PhD

Ljuboš Ušjak graduated at University of Belgrade-Faculty of Pharmacy in 2010. He completed internship at Pharmacy “Belgrade” and Clinical Center of Serbia and passed professional exam for pharmacist (2010-2011). At University of Belgrade-Faculty of Pharmacy, he defended doctoral dissertation “Chemical and pharmacological characterization of selected taxa of the genus Heracleum L. (Apiaceae), autochthonous for Southeast Europe” in 2019 (supervisor Prof. Dr. Silvana Petrović), completed specialist academic studies (SAS) in Pharmacotherapy in Pharmaceutical Practice in 2020 and was awarded for the best scientific research work of postgraduate students in 2019.

During 2012-2013, Ljuboš Ušjak worked at Clinical Center of Serbia. Since 2013, he has been employed as researcher at Department of Pharmacognosy, University of Belgrade-Faculty of Pharmacy (currently as research associate). He participates in realization of practical classes at integrated academic studies (courses Pharmacognosy, Phytotherapy and Analysis of herbal drugs and preparations) and workshops at SAS Pharmacotherapy in Pharmaceutical Practice (courses Phytotherapy 1 and 2). He was member of 1 Committee for doctoral thesis, 14 Committees for final work and co-mentor of 3 student scientific works.

Ljuboš Ušjak was engaged in one national project of Ministry of Education, Science and Technological Development of Republic of Serbia (OI 173021) in period 2013-2019. Since 2023, he participates in one bilateral project of Serbian Academy of Sciences and Arts and Bulgarian Academy of Sciences. In 2023, he completed research stay at Medical University of Lublin (Poland). He published 23 papers in international scientific journals, 3 papers in national scientific journals and 30 abstracts from scientific conferences, gave 1 invited lecture at national scientific conference and reviewed papers for 9 international journals and 1 national journal. His research primarily includes investigation of chemical composition of herbal isolates (extracts and essential oils) using LC-MS and GC-MS methods, and their pharmacological activity.

He speaks English and Slovak.

• Ušjak L, Stojković D, Carević T, Milutinović V, Soković M, Niketić M, Petrović S. Chemical analysis and investigation of antimicrobial and antibiofilm activities of Prangos trifida (Apiaceae). Antibiotics 2024;13(1):41.
  
• Ušjak L, Niketić M, Petrović S. Composition of essential oils from fruits of Peucedanum longifolium and Rhizomatophora aegopodioides (Apiaceae) with regard to other related taxa - a chemometric approach. Separations 2024;11(1):14.
• Ušjak L, Drobac M, Ivanov M, Soković M, Milenković MT, Niketić M, Petrović S. Composition and antimicrobial activity of Pastinaca sativa subsp. sativa, P. sativa subsp. urens and P. hirsuta essential oils. Journal of Essential Oil Research 2023;35(2):154-167.
• Ušjak L, Milutinović V, Đorđić Crnogorac M, Stanojković T, Niketić M, Kukić-Marković J, Petrović S. Barks of three wild Pyrus taxa: phenolic constituents, antioxidant activity, and in vitro and in silico investigations of α‐amylase and α‐glucosidase inhibition. Chemistry and Biodiversity2021;18(10):e2100446.
• Milutinović V, Niketić M, Ušjak L, Nikolić D, Krunić A, Zidorn C, Petrović S. Methanol extracts of 28 Hieracium species from the Balkan Peninsula – Comparative LC–MS analysis, chemosystematic evaluation of their flavonoid and phenolic acid profiles and antioxidant potentials. Phytochemical Analysis 2018;29(1):30-47.
• Ušjak L, Drobac M, Niketić M, Petrović S. Chemosystematic significance of essential oil constituents and furanocoumarins of underground parts and fruits of nine Heracleum L. taxa from Southeastern Europe.Chemistry and Biodiversity2018;15(12):e1800412.
• Milutinović V, Niketić M, Krunić A, Nikolić D, Petković M, Ušjak L, Petrović S. Sesquiterpene lactones from the methanol extracts of twenty-eight Hieracium species from the Balkan Peninsula and their chemosystematic significance. Phytochemistry 2018;154:19-30.
• Petrović S, Ušjak L, Milenković M, Arsenijević J, Drobac M, Drndarević A, Niketić M. Thymus dacicus as a new source of antioxidant and antimicrobial metabolites. Journal of Functional Foods 2017;28:114-121.
• Petrović S, Drobac M, Ušjak L, Filipović V, Milenković M, Niketić M. Volatiles of roots of wild-growing and cultivated Armoracia macrocarpa and their antimicrobial activity, in comparison to horseradish, A. rusticana. Industrial Crops and Products 2017;109:398-403.
• Ušjak L, Petrović S, Drobac M, Soković M, Stanojković T, Ćirić A, Niketić M. Essential oils of three cow parsnips – composition and activity against nosocomial and foodborne pathogens and food contaminants. Food and Function 2017;8(1):278-290.