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master's thesis
Proizvodnja i stabilizacija hladno prešanog orahovog ulja
2014. urn:nbn:hr:109:033359
Cik, Martina
Josip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
Department of Food Technologies
Sub-department of Food Engineering

Cite this document

Cik, M. (2014). Proizvodnja i stabilizacija hladno prešanog orahovog ulja (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY. Retrieved from https://urn.nsk.hr/urn:nbn:hr:109:033359

Cik, Martina. "Proizvodnja i stabilizacija hladno prešanog orahovog ulja." Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2014. https://urn.nsk.hr/urn:nbn:hr:109:033359

Cik, Martina. "Proizvodnja i stabilizacija hladno prešanog orahovog ulja." Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2014. https://urn.nsk.hr/urn:nbn:hr:109:033359

Cik, M. (2014). 'Proizvodnja i stabilizacija hladno prešanog orahovog ulja', Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, accessed 28 January 2025, https://urn.nsk.hr/urn:nbn:hr:109:033359

Cik M. Proizvodnja i stabilizacija hladno prešanog orahovog ulja [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY; 2014 [cited 2025 January 28] Available at: https://urn.nsk.hr/urn:nbn:hr:109:033359

M. Cik, "Proizvodnja i stabilizacija hladno prešanog orahovog ulja", Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, Osijek, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:109:033359

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Metadata
TitleProizvodnja i stabilizacija hladno prešanog orahovog ulja
Title (english)Production and stabilization of cold pressed walnut oil
AuthorMartina Cik
MentorTihomir Moslavac (mentor)
MentorStela Jokić (komentor)
Committee memberStela Jokić
Committee memberJurislav Babić
Committee memberVedran Slačanac
Committee memberTihomir Moslavac
GranterJosip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
(Department of Food Technologies)
(Sub-department of Food Engineering)
Osijek
Defense date and country2014-10-10, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Food Technology
Engineering
Abstract
U ovom radu istraživan je utjecaj procesnih parametara prešanja oraha na efikasnost proizvodnje hladno prešanog orahovog ulja. Prešanje jezgre oraha se provodilo na laboratorijskoj kontinuiranoj pužnoj preši. Prilikom prešanja mijenjali su se procesni parametri: temperature glave preše, brzina pužnice te nastavak za izlaz pogače. Nakon prešanja provedeno je prirodno taloženje sedam dana i centrifugiranje sirovog ulja. Primjenom standardnih metoda određeni su parametri kvalitete ulja: peroksidni broj, slobodne masne kiseline, udio netopljivih nečistoća i udio vlage i hlapljivih tvari. Također, ispitivana je oksidacijska stabilnost proizvedenog hladno prešanog orahovog ulja s i bez dodatka antioksidansa. Korišten je test ubrzane oksidacije ulja (Oven test). Dobiveni rezultati pokazuju da procesni parametri prešanja utječu na iskorištenje ulja. Ekstrakt ružmarina i ekstrakt zelenog čaja dodani u koncentraciji 0,1 % i 0,2 % značajno povećavaju otpornost orahovog ulja prema oksidacijskom kvarenju, u odnosu na druge ispitane antioksidanse.
Abstract (english)
This study researches the influence of process parameters on the efficiency of cold pressed walnut oil production. The walnut core pressing was carried out in a laboratory continuous worm screw press. The process parameters were varied during the pressing: the temperature of the press head, frequency and cake output extensions. After pressing, natural sedimentation was conducted for seven days and centrifugation of crude oil. Walnut oil quality parameters were determined by applying standard methods: peroxide value, free fatty acids, the proportion of insoluble impurities and moisture, and volatile substance. Effect of added antioxidants on the oxidative stability of produced cold pressed walnut oil is also examined, by applying the accelerated oxidation test (Oven test). Obtained results showed the effect of process parameters on the yield of the oil. Compared to other examined antioxidants, rosemary extract and green tea extract added in a concentration of 0.1% and 0.2% are significantly increasing the resistance of walnut oil to oxidative deterioration.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:109:033359
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 In copyright icon
Created on2015-09-25 13:09:53