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master's thesis
Određivanje sadržaja luteina u hrani za nesilice
2021. urn:nbn:hr:182:251531
Jakovljević, Martina
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of Analytical, Organic and Applied Chemistry

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Jakovljević, M. (2021). Određivanje sadržaja luteina u hrani za nesilice (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:251531

Jakovljević, Martina. "Određivanje sadržaja luteina u hrani za nesilice." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2021. https://urn.nsk.hr/urn:nbn:hr:182:251531

Jakovljević, Martina. "Određivanje sadržaja luteina u hrani za nesilice." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2021. https://urn.nsk.hr/urn:nbn:hr:182:251531

Jakovljević, M. (2021). 'Određivanje sadržaja luteina u hrani za nesilice', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 18 November 2024, https://urn.nsk.hr/urn:nbn:hr:182:251531

Jakovljević M. Određivanje sadržaja luteina u hrani za nesilice [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2021 [cited 2024 November 18] Available at: https://urn.nsk.hr/urn:nbn:hr:182:251531

M. Jakovljević, "Određivanje sadržaja luteina u hrani za nesilice", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:182:251531

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Metadata
TitleOdređivanje sadržaja luteina u hrani za nesilice
Title (english)Determination of lutein content in laying hens feed
AuthorMartina Jakovljević
MentorOlivera Galović (mentor)
MentorMartina Šrajer Gajdošik (komentor)
Committee memberTomislav Balić (predsjednik povjerenstva)
Committee memberOlivera Galović (član povjerenstva)
Committee memberMartina Šrajer Gajdošik (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of Analytical, Organic and Applied Chemistry)
Osijek
Defense date and country2021-09-30, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Analytic Chemistry
Abstract
Lutein je antioksidans koji je bitan za ljudsko zdravlje te ga je potrebno unositi u organizam. Nalazimo ga u jajima, a količina luteina u jajima ovisi o količini luteina u hrani za nesilice. Ispitivana je najpovoljnija metoda priprema uzoraka koja uključuje ekstrakciju potpomognutu ultrazvukom korištenjem ultrazvučne sonde (UZVS) u trajanju od 3 min, bez zagrijavanja i pri t = 0. Pripremljeni uzorci analizirani su HPLC metodom. Uspoređena je koncentracija luteina u šest različitih smjesa hrane za nesilice koje su različitog sastava. Najveću koncentraciju luteina imala je hrana za nesilice obogaćena luteinom i drugim nutricinima a iznosila je 14,877 mg/kg hrane. Hrana za nesilice obogaćena luteinom i drugim nutricinima, ali pripremljena godinu dana ranije imala je znatno manju koncentraciju luteina koja je iznosila 3,752 mg/kg hrane. Vrlo visoku koncentraciju luteina imala je hrana za nesilice obogaćena samo luteinom te je iznosila 13,929 mg/kg hrane. Najnižu koncentraciju imala je hrana za nesilice obogaćena vitaminom E s iznosom od 0,321 mg/kg hrane.
Abstract (english)
Lutein is an antioxidant that is important for human health and needs to be taken into the body. We find it in eggs but the amount of lutein in eggs depends on the amount of lutein in laying hens feed. The best method of sample preparation has been researched, and it includes ultrasonic assisted extraction using an ultrasonic probe (UZVS) for 3 min, without heating and at t = 0. The prepared samples were analyzed by HPLC method. We compared concentraction od lutein in six different mixtures of laying hens feed with different composition. The highest concentration of lutein was in laying hens feed enriched with lutein and other nutrients and amounted to 14.877 mg / kg of food. Laying hens food that were enriched with lutein and other nutrients, but prepared a year earlier had a significantly lower concentration of lutein, which was 3.752 mg / kg of food. Laying hens food that is enriched only with lutein had a very high concentration of lutein and amounted to 13.929 mg / kg of food. The lowest concentration was found in laying hens food enriched with vitamin E in the amount of 0.321 mg / kg of food.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:251531
Study programmeTitle: Graduate University Study of Chemistry; research program; specializations in: Research program
Course: Research program
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-08-04 09:06:40