جستجوی مقالات مرتبط با کلیدواژه "soybean oil" در نشریات گروه "شیمی"

Soybean is one of the oilseed plants, among the most important products with high nutritional and economic value. The present research was realized by using 5 soybean varieties (Arısoy, Ataem, Derby, Safir, S-312) that were sown 2 different dates (1st – 15th July) as a second crop for 2 years (2017-2018) with 3 replications. Following ranges of fatty acid values were determined; palmitic (10.42-11.20%), stearic (4.55-5.08%), oleic* (23.62-25.16%), linoleic (51.87-53.36%), linolenic* (5.62-6.25%), arachidic* (0.77-0.96%), total* (99.22-99.66%), SFA (15.94-16.81%), MFA* (23.63-25.17%), PFA (52.68-54.22%), total UFA (77.51-78.26%), w-6/w-3* (8.41-9.05%) while changes in the fatty acids were statistically significant that were affected by sowing time (linolenic and w-6/w-3), variety (arachidic, total) and interactive (oleic, arachidic, MFA) effects. It was concluded that Arısoy and Ataem varieties can be used in breeding studies focusing on oil quality while late sowing caused to decrease in total UFA. As a result, it was concluded that the fatty acid composition quality could be changed depending on the sowing time for oil quality. In addition, it was revealed that ecology, planting time, and cultivar had significant effects on fatty acid composition. The lipid profile in soybeans can be evaluated to improve human health with appropriate variety selection and sowing time. Furthermore, these varieties which can be grown successfully as a second crop, show a wide variation in fatty acid quality and can be used in breeding studies.

The paper presents the enzymatic degumming of soybean oil by immobilization of phospholipase A1 (PLA1) on atmospheric plasma surface modified chitosan nanofibrous membrane. As evidenced by Scanning Electron Microscopy (SEM) images, chitosan nanofibers exhibited a number of properties indicating this polymer as a good enzyme carrier. Fourier Transform InfraRed (FT-IR) spectroscopy showed the reaction between the enzyme and functional groups of chitosan nanofibers. The properties of immobilized PLA1 were compared to free PLA1 in order to evaluate the possibility of using the immobilized enzyme for the degumming of soybean oil. The pH tolerance and thermal stability of the immobilized PLA1 were significantly improved. In addition, the immobilized PLA1 can be easily recovered and retained at 80% of its initial activity after 10 times of recycling. The enzymatic degumming process was carried out at 60°C and pH 6.0. The residual phosphorus content decreased to 8.6 mg/kg after 6 h, which is to meet oil safety standards and suitable for the physical refining of soybean oil.