Praćenje udjela fenolnih spojeva i antioksidacijske aktivnosti u hidrolatima i eteričnim uljima odabranog samoniklog bilja

master's thesis

• Title (english): Monitoring the proportion of phenolic compounds and antioxidant activity in the hydrolates and essential oils of selected wild plants
• Author: Doris Barić
• Mentor: Maja Dent (mentor)
• Committee member: Antonija Trontel (predsjednik povjerenstva)
• Committee member: Kristina Radošević (član povjerenstva)
• Committee member: Marina Cvjetko Bubalo (član povjerenstva)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Chemistry and Biochemistry); (Laboratory for Analytical Chemistry); Zagreb
• Defense date and country: 2024-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

U ovom radu istražen je fenolni sastav hidrolata i antioksidacijska aktivnost hidrolata i eteričnih ulja ružmarina, lovora, bosiljka, kadulje i komorača kroz vremenski period od 90 dana. Nakon provedene vodene destilacije po Clevengeru i odvajanja eteričnih ulja i hidrolata ružmarina, lovora, bosiljka, kadulje i komorača, uzorci se čuvani u staklenoj ambalaži pri sobnoj temperaturi kroz 90 dana. Nakon određenog broja dana čuvanja (0., 7., 14., 21., 30., 60. i 90. dan) spektrofotometrijski su određeni maseni udjeli ukupnih fenolnih spojeva u hidrolatima i antioksidacijska aktivnost (FRAP i DPPH metodom) u hidrolatima i eteričnim uljima. Dobiveni rezultati su pokazali pad masenog udjela ukupnih fenolnih spojeva u hidrolatima ružmarina, lovora, bosiljka, kadulje i komorača nakon 21. dana, a kadulje nakon 7. dana te smanjenja antioksidacijske aktivnosti u hidrolatima i eteričnim uljima nakon 7. dana, a bosiljka i kadulje nakon 21. i 30. dana.

Abstract (english)

In this paper, the phenolic composition of hydrolates and antioxidant activity of hydrolates and essential oils of rosemary, bay laurel, basil, sage and fennel were investigated over a period of 90 days. After hydrodistillation according to Clevenger and separation of essential oils and hydrolates of rosemary, bay laurel, basil, sage and fennel, the samples are stored in glass containers at room temperature for 90 days. After a certain number of days of storage (0, 7, 14, 21, 30, 60 and 90 days), the mass fractions of total phenolic compounds in the hydrolates and the antioxidant activity (FRAP and DPPH method) in the hydrolates and essential oils were determined spectrophotometrically. The obtained results showed a decrease in the mass fraction of total phenolic compounds in hydrolates of rosemary, bay laurel, basil, sage and fennel after 21 days, and sage after 7 days, and a decrease in antioxidant activity in hydrolates and essential oils after 7 days, and basil and sage after 21 and 30 days.

• Keywords: eterično ulje; hidrolat; ukupni fenoli; antioksidacijska aktivnost
• Keywords (english): essential oil; hydrolate; total phenols; antioxidant activity
• Language: croatian
• URN:NBN: urn:nbn:hr:159:188510
• Study programme: Title: Bioprocess Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka bioprocesnog inženjerstva (magistar/magistra inženjer/inženjerka bioprocesnog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-10-21 12:32:58