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undergraduate thesis
Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis)
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2017. urn:nbn:hr:159:989995
Marjanović, Ivona
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Chemistry and Biochemistry
Laboratory for Analytical Chemistry

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

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Marjanović, I. (2017). Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis) (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:989995

Marjanović, Ivona. "Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis)." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2017. https://urn.nsk.hr/urn:nbn:hr:159:989995

Marjanović, Ivona. "Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis)." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2017. https://urn.nsk.hr/urn:nbn:hr:159:989995

Marjanović, I. (2017). 'Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis)', Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 20 November 2024, https://urn.nsk.hr/urn:nbn:hr:159:989995

Marjanović I. Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis) [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2017 [cited 2024 November 20] Available at: https://urn.nsk.hr/urn:nbn:hr:159:989995

I. Marjanović, "Spektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis)", Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:159:989995

Metadata
TitleSpektrofotometrijsko određivanje polifenola u acetonskim ekstraktima lovora (Laurus nobilis)
Title (english)Spectrophotometric determination of polyphenols from acetone extracts of laurel (Laurus nobilis)
AuthorIvona Marjanović
MentorAntonela Ninčević Grassino (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Chemistry and Biochemistry)
(Laboratory for Analytical Chemistry)
Zagreb
Defense date and country2017-07-17, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Polifenoli su iznimno vaţni zbog svog antioksidativnog djelovanja i pozitivnog učinka na ljudsko zdravlje. Mogu pokazivati i antikorozijska svojstva, a njihova sposobnost adsorpcije na metale ili metalne legure pripisuje se njihovim strukturnim karakteristikama. U ovom radu su pripravljeni acetonski ekstrakti lišća lovora ( = 30 i 70 %) primjenom ultrazvučne ekstrakcije pri vremenu od 3, 6 i 9 min i amplitudi od 60, 80 i 100 %. Maseni udio ukupnih fenola i flavonoida u pripravljenim ekstraktima određen je spektrofotometrijski. Na temelju dobivenih rezultata mjerenja određeni su optimalni uvjeti (70 %-tni aceton, A = 100 % i t = 9 min) ultrazvučne ekstrakcije, koji će se koristiti u daljnjim pripravama ekstrakata pri praćenju njihova antikorozijskog djelovanja.
Abstract (english)
Polyphenols are extremely important because of their antioxidant activity and positive effects on human health. They can show anticorrosion property, and their absorption capability on metals or metal alloys depend on their structural characteristics. In this work, laurel leaves acetone ( = 30 and 70 %) extracts were prepared by ultrassound extraction at time of 3, 6 and 9 min and amplitude of 60, 80 and 100 %. Mass fraction of total phenols and flavonoids in prepared extracts is determined by spectrophotometric method. With regard to obtained results, optimal conditions (70 % acetone, A = 100 % and t = 9 min) of ultrasound extraction were determined and will be used for further preparation of extracts for monitoring of its anticorrosion activity.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:989995
Study programmeTitle: Biotechnology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2017-07-20 08:38:14