جستجوی مقالات مرتبط با کلیدواژه « اسید لینولنیک » در نشریات گروه « صنایع غذایی »

Rapeseed contains one of the highest quality oils with balanced components of saturated and unsaturated fatty acids. During the 2018-2019 academic year, the Bayekola Agricultural Research Station in Neka City conducted a randomized complete block design experiment with three replications. Factors included planting arrangement in two levels: one-row and two-row; and weed control in seven levels of application of herbicides: Treflan lontral herbicide 1 liter per hectare before planting and mixed with soil; butisan star 2.5 liters per hectare before planting and before emergence of rapeseed and weeds; lontral herbicide 1 liter per hectare in stages of 2 to 4 leaves of weeds; paraquat herbicide 2 liters per hectare in stages of 4 to 6 weed leaves; weed control and without weed control. The results showed that changing the arrangement of planting and application of guided herbicide in two rows increased canola seed protein percentage by 21.31%, linoleic acid by 24.22%, linoleic acid by 10.08%, oil yield and yield of canola by 78.46% and 78.48%, respectively. Also, palmitic acid decreased by 11.06% when application of this treatment was made. Therefore, by managing canola agronomy and adjusting the row spacing to utilize guided herbicide paraquat, in addition to weed control, canola also increased protein content, unsaturated fatty acids, oil yield, and rapeseed grain.

Omega-3 fatty acids are a large group of polyunsaturated fatty acids. Docosahexaenoic acid, the most important omega-3 fatty acid, has beneficial effects on human health. The aim of this study was to convert flaxseed oil by native strain of Aurantiochytrium to omega-3 oil rich in DHA and linolenic acid.At first, lipase production and its activity was measured in broth medium. Production of biomass and oil in medium containing amounts of flaxseed oil were determined. Also, saturated and unsaturated fatty acids were determined by gas chromatography. Aurantiochytrium strain produced precipitated halozone after 48 hours incubation in lipase production medium with a diameter of 6 mm. Lipase activity of 150 units per ml was measured in medium containing 1% of flaxseed oil. atty acids oil in basal medium without flaxseed oil was including C14, C15, C16, C17, C18, C18:1, DPA and DHA. By adding flaxseed oil to the basal medium, biomass was increased to 15.7 g/l. The greatest amount of DHA (388 mg/l) and oil content (53.25%) was obtained in medium containing 0.6% of flaxseed oil. In conclusion, by increasing the concentration of flaxseed oil in medium, the amount of saturated fatty acids was decreased and mono or polyunsaturated fatty acids were increased. Also, fatty acids profile of oil produced in flaxseed oil medium was including C18:2, C18:3, DPA and DHA. Finally, produced omega-3 oil was contained DHA, linolenic and oleic acid and can be used to enrichment foods and dairy products.