The production of rice bran oil is severely impeded because of the rapid rancidity caused by rice bran lipase. Eleven stabilization treatments including 6 heating treatments and 5 nonheating treatments were carried out in this research. Lipase activities as well as oil colors, oil compositions, and contents of vitamin E and γ‐oryzanol after different treatments were investigated to evaluate the effect of stabilization and oil qualities. All the treatments had no significant influence (p > .05) on the oil compositions and γ‐oryzanol contents. Among six heating treatments, autoclaving had the best stabilization effect for 10.73% lipase activity remained and other heating treatments held about 30%–35% lipase activities residual except dry heating (68.88%). Heating treatments except steam heating resulted in the significant decreases (p < .05) of oil acid values and significant increases (p < .05) of peroxide values, meanwhile six heating treatments increased oil colors. Among five nonheating treatments, ultraviolet irradiation for 18 hr and extreme low temperature (−80°C) for 72 hr were found 57.08% and 58.85% lipase activities residual, respectively. Peroxide value was significantly increased (p < .05) only by ultrasound. All nonheating treatments had little effect (p > .05) on oil acid values and color. In conclusion, ultraviolet irradiation might be a potential, convenient, and energy‐saving stabilization method with high oil quality. Practical applications Rice bran has a potential for producing about 8 million tons of rice bran oil worldwide but nearly 90% rice bran was wasted every year. The processing of rice bran is impeded because of the rancidity caused by lipase, so the stabilization of rice bran is very important. This research provided a new and time‐saving method for evaluating stabilization efficacy instead of long time storage. Using this new evaluating method, 11 stabilization methods were compared and methods like microwave, extrusion, and ultraviolet irradiation were considered to be suitable methods for industrial processing. In additional, ultraviolet irradiation was found to be a potential, convenient, and energy‐saving stabilization method without influencing oil quality and nutrient content.
The cover image is based on the Original Article Comparison of eleven rice bran stabilization methods by analyzing lipase activities by Ze‐Yuan Deng, Cheng‐wei Yu, Qirui Hu et al., https://doi.org/10.1111/jfpp.14370.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.