20.500.12556/DKUM-14540 Značilnosti olja v lanenem semenu (Linum usitatissimum L.) Characteristics of linseed oil (Linum usitatissimum L.) Namen naloge je bil raziskati kakovosti olja dveh sort lanu, pridelanih v poljskem poskusu na poskusnem posestvu IHPS v Žalcu. Preučevali smo tudi pridelek semena in pridelek olja ter primerjali podatek o vsebnosti olja v semenu oljnic, pridobljen s hladnim stiskanjem olja in z ekstrakcijo. Kakovost olja smo ugotavljali z določitvijo jodnega, kislinskega števila ter maščobno-kislinske sestave. Sorta oljnega lanu Flanders je v primerjavi s sorto Cebeco dosegla primerljiv pridelek in je imela značilno večjo vsebnost olja v semenu, zato je imela posledično tudi (neznačilno) višji pridelek olja. Vsebnost olja, pridobljena s hladnim stiskanjem, se ni bistveno razlikovala od podatka o vsebnosti olja, pridobljenega z ekstrakcijo. Z določitvijo jodnega števila smo potrdili visoko vsebnost nenasičenih maščobnih kislin. Kislinsko število je pri obeh sortah nižje od dovoljene meje za uporabo olja za biodizel. Delež linolenske kisline pri obeh sortah je velik in presega 50%, kar nakazuje močne oksidativne lastnosti lanenega olja obeh sort. Glede na karakteristike olja smo potrdili, da olje ni primerno v namen izdelave biodizla. Poleg tega je pridelek olja pri lanu v svetovnem merilu le polovičen v primerjavi s pridelkom olja na enoto površine pri oljni ogrščici. Laneno olje velja po svetu za zelo kakovosten prehranski dodatek. Tudi v naši raziskavi smo glede na preučevane parametre potrdili, da spada to olje med jedilna olja. Priporoča se zgolj kot prehranski dodatek, saj v večjih količinah lahko povzroča neželene učinke na prebavila. The purpose of this thesis was to explore the quality of two flax varieties that were produced in a field experiment on experimental field of Slovenian Institute of Hop Research and Brewing in Žalec. We studied both the production of seed and the production of oil. We compared the contents of cold pressed oil and of oil gained by extraction. Oil content was significantly higher at variety Flanders compared to variety Cebeco. Variety Flanders achieved higer yield compared to variety Cebeco, but the difference was not significant. Therefore, Flanders had higher oil yield compared to variety Cebeco, but the difference was not significant. The content of oil gained by cold pressing was not essentially different compared to the result gained by extraction. We detected high content of unsaturated fatty acids. The acid value of both varieties was lower that the value which is allowed that specific oil is used for biodiesel. The share of linolenic acid was high at both varieties; it exceeded 50%, which indicates oxidising features of both varieties. Given the characteristics of oil, we confirmed that the oil is not suitable for the purpose of manufacturing biodiesel. In addition, the yield of flax oil amounts up to only half of yield worldwide compared to the oil yield gained per unit area of oilseed rape. Linseed oil is the high-quality nutritional supplement known worldwide. On the basis of the parameters, our study confirmed that this oil falls within the category of cooking oils. It is recommended only as a food additive, due to the fact that it can cause gastrointestinal side effects in larger quantities. lan (Linum usitatissimum L.) laneno olje hladno stiskanje olja ekstrakcija olja jodno število kislinsko število maščobno-kislinska sestava flax (Linum usitatissimum L.) linseed oil cold-pressing oil extraction oil iodine number acid number fatty acid composition true true false [B. Drozg] Slovenski jezik Angleški jezik Diplomsko delo 2010-06-19 20:09:53 2010-07-27 14:03:29 2022-04-12 22:06:40 2023-12-17 03:22:03 2010 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 665.345.4(043.2) 17794056 URN:SI:UM:DK:0DVPXSLS UNI_Drozg_Bogdana_2010.pdf UNI_Drozg_Bogdana_2010.pdf 1 243326CD1D942DEAF5B8F3DAF9AE62C2 05c4897f582c87e3967461fc3e0c537b7085cc83bb2f882da6a0fe9a23f3a9e2 2dc218ea-7c04-11eb-bb7a-00155d0001ca 20.500.12556/dkum/add7703f-dc93-4a7b-a406-5acd0b4bac8d https://dk.um.si/Dokument.php?lang=slv&id=15510 Fakulteta za naravoslovje in matematiko 0 0 0