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Постійне посилання колекціїhttps://dspace.nuft.edu.ua/handle/123456789/7522
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Документ Application of enzymes for pressed oil production from pumpkin seeds(2023) Vovk, Hanna O.; Karnpakdee, Kwankao; Golubets, Olga; Levchuk, Irina; Ludwig, Roland; Nosenko, TamaraThe evaluation of cell integrity by immediate hexane extraction (shaking method) showed that all samples treated with different enzymes had a higher oil yield, ranging from 33.2 to 34.1 % of seed weight, than the control samples (32.1 %). The number of disrupted cells in enzyme treated samples was also higher than the control (64.4%), ranging from 67.6 to 69.5 %. The highest amount of damaged cells, 71.0 and 71.1 %, was found in the samples treated with mixtures (a) pepsin, Viscozyme L, pectinase and (b) pepsin, cellulase,pectinase. The yield of pressed oil from pumpkin seeds pretreated with the pepsin+ViscozymeL+pectinase mixture was by 7.0 % higher than that of the control sample. The enzymatic pretreatment did not significantly affect the free fatty acid content, peroxide value, fatty acid, and phytosterols composition. The antioxidant activity expressed as DPPH radical scavenging capacity of the pressed oil obtained from enzymatically pretreated pumpkin seeds was by 2.7 % higher than of control oil.Документ Composition and properties of peanut and sunflower oil blends(2017) Babenko, Valeriy; Bakhmach, Volodymyr; Porociuk, Oksana; Levchuk, Irina; Golubets, Olga; Shkaruba, SergiiInvestigation of the properties of refined deodorized peanut and sunflower oil blends has been carried out in order to influence the indexes of their antioxidant properties on the basis of acid and peroxide numbers.Дослідження властивостей рафінованих дезодорованих арахісових та соняшникових олійних сумішей проведено з метою впливу на показники їх антиоксидантних властивостей на основі кислотних та перекисних чисел.Документ Analysis of near infrared reflectance spectrum of rape seed with different content of erucic acid(2013) Nosenko, Tamara; Hutsalo, Inna; Nosenko, Volodymyr; Levchuk, Irina; Litvynchuk (Vorontsova), SvitlanaThe objective of this study was to analyze of reflectance spectrum in near-infrared region of rapeseed with different erucic acid content and to choose the most informative wavelength for development of calibration equation. Near–infrared reflectance spectra at 1330-2370 nm were measured for rape seed with high and low erucic acid content. The fatty acid composition of seed oil were determined by gas-liquid chromatography. We have detected difference in absorbance level between low and high erucic acid seed in the range of 1700-1860 and 1930-2370 nm. The first derivative of reflectance spectra were analyzed and wavelength set are proposing for development of calibration equation of erucic acid content in rape seed. Our data could be used for determination of erucic acid content in rape seed by near–infrared reflectance spectroscopy.