Physicochemical properties of soybean oil extracted from γ-irradiated soybeans

Oil quality characteristics of irradiated sunflower and maize seed

“…The results showed that oil contents of both types of seeds were not affected quantitatively by gamma radiations ( p>0.05). The results obtained in this study are in accordance with the previous results which reported that there was no significant effect of gamma radiations on the oil yield in soybean oilseeds and broad beans [24,25]. Crude protein, fiber, and ash contents were 13.90, 6.67, 4.93% and 7.81, 6.33, 1.46% for unirradiated sunflower and maize seeds, respectively.…”

“…Hassan et al [39] also observed a decrease in unsaturated fatty acids with an increase in the radiation dose and prolonged storage. While Byun et al [24] found no significant effect on fatty acid composition of oil extracted from unirradiated and irradiated (0-10 kGy) soybean seeds. Previous study on the radiolysis of fat showed that the amount of linoleic fatty acid decreased with increase of absorbed radiation dose, suggesting that the irradiation induced a selective loss of unsaturated fatty acids which may be due to radiolysis, involving primary ionization followed by cleavage at preferential position near the carbonyl group [40,41].…”

Effect of γ-irradiation on the physicochemical and sensory properties of raw unpeeled almond kernels (Prunus dulcis)

“…A dose of 7 kGy resulted in a ten-fold increase in PV. Present results are in agreement with those of Inayatulah, Zeb, Ahmad, and Khan (1987) for soybean, Chiou (1994) for peanut oil, Buyn, Kang, Kwon, Hayashio and Mori (1995) for soybean oil, WilsonKakashita, Gerdes, and Hall (1995) for walnut Uthman, Toma, Garcia, Medora, and Cunningham (1999) for almond, Gölge and Ova (2008) for pine nut. On the contrary Al-Bachir (2004) reported no change in PV after irradiation of walnuts at doses up to 2.0 kGy.…”

“…Gölge and Ova (2008) reported that the effect of irradiation on palmitic, stearic, oleic and linoleic acids was statistically insignificant (p N 0.05) for pine nuts. Also Buyn et al (1995) did not find significant changes in fatty acid composition of soybean oil irradiated at different gamma radiation doses. Linolenic acid (C 18:3 ) was not determined in the present study while Sánchez-Bel, Martìnez-Madrid, Egea, and Romojaro (2005) determined linolenic acid (C 18:3 ) in non-irradiated and irradiated Prunus amygdalus up to 3 kGy in traces.…”

Effect of γ-irradiation on the physicochemical and sensory properties of cashew nuts (Anacardium occidentale L.)

“…The observed lag in PV values between 1.5 and 5 kGy may be possibly related to simultaneous formation and destruction of hydroperoxides for the production of secondary oxidation products at intermediate irradiation doses. Present results on PV are in general agreement with those of Inayatulah, Zeb, Ahmad, and Khan (1987) for soybeans, Chiou (1994) for peanut oil, Buyn, Kang, Kwon, Hayashio, and Mori (1995) for soybean oil, WilsonKakashita, Gerdes, and Hall (1995) for walnuts and Uthman, Toma, Garcia, Medora, and Cunningham (1998) for almonds and Gö lge and Ova (2008) for pine nuts, given that differences when comparing various substrates (i.e. soybean vs. soybean oil) but contradict those of Al-Bachir (2004) who found no differences in peroxide value between non-irradiated and irradiated walnuts at doses up to 2 kGy.…”