Composition of Rice Bran Stearin from Various Refineries Across China

Abstract

SFA), of which the main component was palmitic acid. The largest amount of SFA was obtained by independent fractionation at −8 °C (62.3 wt. % recovered from a fraction containing 26.3 % SFA). Adhikari et al. [7] prepared Abstract In this study, we evaluated the composition of rice bran stearin (RBS) from various refineries across China. Here, we report the physicochemical parameters of RBS. The slip melting point ranged from 20.8 to 35.3 °C. The free fatty acid content (0.05-0.27 %) and peroxide value (0.34-3.70 mequiv oxygen/kg) was quite low, indicating that the RBS was of good quality. The iodine value ranged from 85.8-102.9 g/100 g, indicating a high unsaturated bond content. There was a significant difference in the unsaponifiable matter content (1.20-3.87 %) among RBS samples. The oxidative stability index (OSI) ranged from 0.56 to 5.85 h. The palmitic acid content in RBS refined by molecular distillation was significantly higher than the RBS that was refined physically and chemically. The major triacylglycerol was LLO/OLL, PLL/LPL, OLO, PLP, OOO and POO (L, linoleic acid; O, oleic acid; P, palmitic acid). RBS contained high levels of micronutrients, including total tocopherols (23.3-117.9 mg/100 g), oryzanol (0.1-2.1 %), and total sterols (682.9-1787.3 mg/100 g). Moreover, three different kinds of solid fat curves were distinguished. The results presented here are probably the first report regarding RBS on an industrial scale, meanwhile the potential utilization of RBS is discussed.

Role of Operating Process Parameters on Stability Performance of Green Emulsion Liquid Membrane Based on Rice Bran Oil

“…In this present investigation rice bran oil (RBO) as a green diluent is used in place of these oil derivatives during the formulation and preparation of membrane phase which has been observed to be the most suitable vegetable oil for the green emulsion liquid membrane (GELM) formulation during our previous study as published in Journal of Dispersion Science and Technology [28]. RBO helps in forming a stable GELM since it has balanced composition of Palmitic (saturated fatty acid)-24%)), Oleic (mono-unsaturated fatty acid)-42%)), and Linoleic (poly-unsaturated)-34%)) which is close to the WHO recommendation of 1 : 1.5 : 1 [29,30]. The stability of ELM based separation techniques is a major concern till date, therefore, a detailed parametric study on the stability performance (such as dynamic stability (min), emulsion swelling (%), and membrane breakage (%)) of RBO based GELM has been examined experimentally.…”

Iron Encapsulation in Water‐in‐Oil Emulsions: Effect of Ferrous Sulfate Concentration and Fat Crystal Formation on Oxidative Stability

“…In summary, iron addition promoted lipid oxidation in the W/O emulsions, but rice bran stearin addition retarded lipid oxidation. It should be noted that both rice bran oil and rice bran stearin naturally contain minor antioxidant components (γ‐oryzanol, tocopherols, tocotrienols, phytosterols, polyphenols, and squalene) at a level that is fairly comparable (Van Hoed and others ; Shi and others ). Consequently, we would not have expected that substituting some of the rice bran oil with rice bran stearin would have had a major influence on the antioxidant activity of these minor constituents.…”

Recovery of γ-Oryzanol from Rice Bran Acid Oil by an Acid-base Extraction Method with the Assistance of Response Surface Methodology

“…γ-Oryzanol, a group of ferulic acid esters of phytosterols and triterpene alcohols derived from rice bran oil RBO , is claimed to have many health benefits such as lowering blood cholesterol, inhibiting tumor growth, anti-diabetic activity and preventing neurodegenerative diseases 1 4 . γ-Oryzanol is a potent natural antioxidant that has been widely used in the food, cosmetic and pharmaceutical industries 5,6 . Owing to the continuous growth of the global γ-oryzanol market, its cost is expected to reach 2.06 billion dollars in 2022 7 .…”