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Sikavica (Silybum marianum L.) je dvogodišnja, zeljasta, krupna i razgranata biljka do 2 m visine. Sikavica je poznata po tvari silimarin koja povoljno djeluje na jetru, a nalazi se u sjemenkama. U ovom radu istraživana je održivost hladno prešanog ulja sikavice s dodatkom prirodnih antioksidanasa, umjetnog antioksidansa i sinergista, primjenom Schaal Oven testa pri 63 ᵒC tijekom četiri dana. Od antioksidanasa korišteni su: ekstrakti ružmarina (tip StabilEnhance i tip OxyLess CS), α-tokoferol, mješavina tokoferola, ekstrakt kadulje, eterično ulje (lavanda, slatki pelin, smilje, lovor, timijan i komorač), propil galat i sinergist limunska kiselina. Rezultati su pokazali da ekstrakt ružmarina (tip OxyLess CS 0,2 %) i ekstrakt ružmarina (tip OxyLess CS 0,2 %) sa sinergistom limunskom kiselinom (0,01 %) imaju najbolje antioksidacijsko djelovanje kod stabilizacije hladno prešanog ulja sikavice. Milk thistle (Silybum marianum L.) is a biennial, herbaceous, tall and branched plant, which can grow up to 2 metres. It is known to contain silymarin, which is a substance that has a positive effect on the liver and it is found in the seeds of the plant. This is a research on the sustainability of milk thistle's cold pressed oil with the addition of natural antioxidants, artificial antioxidants and synergist. The method used for this research is the Schaal Oven test, which was applied for 4 days at 63°C. The antixodiants used were the rosemary extracts (StabilEnhance and Oxyless CS types), alpha tocopherol, mixed tocopherols, sage extract, essential oil (lavander, sweet wormwood, helichrysum, bay leaves, thyme), propyl gallate and a citric acid synergist. The results have shown that the rosemary extract of type Oxyless CS 0,2% and the rosemary extract of type Oxyless CS 0,2% with a citric acid synergist (0,02%) have the most prominent antioxidant effect on the cold pressed oil of milk thistle. |
