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master's thesis
Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2022. urn:nbn:hr:159:800475
Blažević, Ivana
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Food Engineering
Laboratory for Technology of Milk and Milk Products

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

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Blažević, I. (2022). Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka (Master's thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:800475

Blažević, Ivana. "Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2022. https://urn.nsk.hr/urn:nbn:hr:159:800475

Blažević, Ivana. "Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2022. https://urn.nsk.hr/urn:nbn:hr:159:800475

Blažević, I. (2022). 'Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka', Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 30 December 2024, https://urn.nsk.hr/urn:nbn:hr:159:800475

Blažević I. Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka [Master's thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2022 [cited 2024 December 30] Available at: https://urn.nsk.hr/urn:nbn:hr:159:800475

I. Blažević, "Utjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka", Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:159:800475

Metadata
TitleUtjecaj različitih režima toplinske obrade na kvalitetu kobiljeg mlijeka
Title (english)Influence of different heat treatments regimes on mare`s milk quality
AuthorIvana Blažević
MentorIrena Barukčić Jurina (mentor)
Committee memberKatarina Lisak Jakopović (predsjednik povjerenstva)
Committee memberTamara Jurina (član povjerenstva)
Committee memberKsenija Marković (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Food Engineering)
(Laboratory for Technology of Milk and Milk Products)
Zagreb
Defense date and country2022-09-27, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Food Technology
Abstract
Kobilje mlijeko je oduvijek bilo cijenjena namirnica zbog brojnih terapeutskih svojstava. Kako bi se očuvao jedinstven nutritivni sastav, kobilje mlijeko najčešće se konzumira sirovo ili se smrzava. Cilj ovog rada bio je ispitati utjecaje različitih toplinskih tretmana na kvalitetu kobiljeg mlijeka. Pri tom je praćena koncentracija hidroksimetilfurfurala (HMF) nastalog uslijed toplinske obrade, antioksidacijska aktivnost (AA) pomoću DPPH i FRAP metoda te udjel ukupnih fenola Folin Ciocalteu metodom. SDS-PAGE elektroforezom je praćena denaturacija proteina, dok je blisko-infracrvena spektrometrija (NIR) korištena za kvalitativnu analizu struktirnih promjena u uzorcima mlijeka. Dobiveni rezultati ukazuju kako povišenje temperature i/ili duže trajanje toplinske obrade uzrokuje povećanje koncentracije HMF-a, ukupnih fenola i AA mjerene FRAP metodom, dok je AA mjerena DPPH metodom padala. Nadalje, povećanjem intenziteta toplinskog režima smanjivale su se vrijednosti ukupnih otopljenih tvari i električne vodljivosti. SDS-PAGE elektroforeza je ukazala na denaturaciju nekih proteina. Analiza glavnih komponenata dobivenih NIR spektara pokazala je sličnosti među određenim uzorcima u odnosu na primijenjen toplinski režim.
Abstract (english)
Mare milk has always been a highly appreciated due to its therapeutic characteristics. In order to maintain a unique nutritive profile, mare milk is usually consumed raw or it is frozen. The aim of this study was to examine the effects of different heat treatments on mare milk quality. Thereby following parameters were determined: hydroxymethylfurfural (HMF) concentration, antioxidant activity (AA) by the DPPH and FRAP method, and the total phenol content by the Foline Ciocalteu method. SDS-PAGE electrophoresis was used to monitor protein denaturation while Near Infrared Spectroscopy (NIR) for qualitative analysis of structural changes in milk samples. According to the obtained results, with time and/or temperature increase the concentrations of HMF, AA (FRAP) and total phenols content increased too, while AA measured by the DPPH method, total dissolved solids and electrical conductivity decreased. SDS-PAGE electrophoresis indicated denaturation of some proteins. Principal Component Analysis of NIR spectra revealed similarities between the tested samples in relation to the applied thermal regime.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:800475
Study programmeTitle: Food Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka prehrambenog inženjerstva (magistar/magistra inženjer/inženjerka prehrambenog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) icon
Created on2023-02-24 13:40:01