Topic
Rice bran oil
About: Rice bran oil is a research topic. Over the lifetime, 2102 publications have been published within this topic receiving 32504 citations.
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01 Jan 2002
6 citations
TL;DR: In this article, a scaled-up low-trans shortening (LTS) was produced by lipase-catalyzed interesterification, and physicochemical melting properties of LTS were compared with commercial shortening.
Abstract: Scaled-up low-trans shortening (LTS) was produced by lipase-catalyzed interesterification. Blend of rice bran oil (RBO), palm stearin (PS) and high oleic sunflower seed oil (HO) with 1:2:0.9 (w/w/w) ratio was interesterified using immobilized lipase from Thermomyces lanuginosus (TLIM) in the batch type reactor at 65 o C for 24 hr, and physicochemical melting properties of LTS were compared with commercial shortening. Solid fat content (SFC) of commercial shortening (used as control) and LTS was similar at 9.56 and 8.77%, respectively, at 35 o C. Major fatty acids in LTS were C16:1 (33.7 wt%), C18:1 (45.7 wt%) and C18:2 (13.4 wt%). Trans fatty acid content in the commercial shortening (4.8 wt%) was higher than that of LTS (0.5 wt%). After reverse-phase HPLC analysis, major triacylglycerol (TAG) species in LTS were POO, POP and PLO. Total tocopherol, γ-oryzanol and phytosterol contents in the LTS were 12.37, 0.43 and 251.38 mg/100 g, respectively. Hardness of LTS was similar to that of commercial shortening. Also, x-ray diffraction analysis showed coexistence of β' and β form in the LTS.
6 citations
Journal Article•
TL;DR: Replacing saturated fatty acids with unsaturated fatty acids in rats’ diet had beneficial effects on serum lipid profile and oxidative stress, and comparison of the 3 edible oils showed that GSO had a more profound effect on decreasing hyperlipidemia.
Abstract: Background: Dyslipidemia is considered as one of the crucial contributors to cardiocerebro-vascular diseases. Objectives: The present study aimed to compare the effects of Rice Barn Oil (RBO), Grape Seed Oil (GSO), and Canola Oil (CO) on dyslipidemia and oxidative stress in experimentally induced hyperlipidemic rats. Materials and Methods: In the present experimental study, forty hyperlipidemic male Wistar rats were randomly assigned to 4 groups to receive RBO, GSO, or CO or Soy Bean Oil (SBO), as controls, for 4 weeks following a 3-week period of Atherogenic Diet (AD) intake. Blood samples were collected at the beginning of the study, after inducing dyslipidemia, and at the end of the experimental period. Then, the data were entered into the SPSS statistical software (v. 13.0) and analyzed using paired t-test, paired sample Wilcoxon signed rank test, and Kruskal-Wallis test. Results: AD elevated lipid and/or lipoprotein profile and decreased the paraoxonase activity in the hyperlipidemic rats. The results of paired t-test revealed that RBO led to a significant improvement in serum lipoprotein profile and paraoxonase activity. Besides, a significant difference was found in the GSO group regarding all the measured parameters, except for paraoxonase activity. Moreover, CO diet showed a significant hypolipidemic effect on serum Triglyceride (TG) and Total Cholesterol (TC) and led to a slight improvement in Low Density Lipoprotein-Cholesterol (LDL-C) and High Density Lipoprotein-Cholesterol (HDL-C). Conclusions: The results of the present study suggested that vegetable oils, including RBO, GSO, and CO, might improve dyslipidemia and oxidative stress in hyperlipidemic rats. Indeed, substituting saturated fatty acids with unsaturated fatty acids in rats’ diet had beneficial effects on serum lipid profile and oxidative stress. Comparison of the 3 edible oils showed that GSO had a more profound effect on decreasing hyperlipidemia.
6 citations
Patent•
24 Mar 1993
TL;DR: In this article, a method and equipment are used to produce plant oil, especially rice bran oil, which is suitable for producing plant oil and is more efficient than conventional methods.
Abstract: This invented method and equipment are suitable to produce plant oil, especially rice bran oil. It features that the raw material is heated to 120-130 deg.C while it is extruded and puffed, and the puffed raw material is in time pressed to obtain oil. Its main equipment include puffing and pressing mechanisms and necessary conveying apparatus. Its advantages are less investment on equipment, high oil yield rate and high quality of crude oil.
6 citations
TL;DR: In this paper, the Gamma-oryzanol was used to study the stability of pea nut and linseed oil using rancimat at varying temperature (110-130 oC) and concentration (100-300 ppm).
Abstract: Rice bran oil distillate is one among the secondary products produced during refining of rice bran oil. Rice bran oil distillate is a source of several micronutrients and natural antioxidants like Gamma-oryzanol, tocopherols etc. The aim of the present study was to separate Gamma-oryzanol from distillate and utilize it as a stabilizer for edible oil. In order to achieve this aim crystallization process was applied to obtain oryzanol rich concentrate. Further purification of oryzanol was achieved through column chromatography. Fractions of Gamma-oryzanol were quantified through HPLC which gives 0.83% yield. Separated Gamma-oryzanol was used to study the stability of pea nut and linseed oil using rancimat. The experiments were carried out in rancimat at varying temperature (110-130 oC) and concentration (100-300 ppm). Stability of both the oil was found to be directly proportional to the Gamma-oryzanol concentration and inversely proportional to the temperature.
6 citations