Showing papers on "Rice bran oil published in 1987"
Journal Article•
70 citations
TL;DR: The composition of lipids of bran from three varieties of rice is reported, and acylated steryl glucoside and digalactosyldiacylglycerol were the main glycolipids, while monogalacto-monoacyl glycerol was present in small amounts.
Abstract: The composition of lipids of bran from three varieties of rice is reported. Lipids extracted amounted to 21.9–23.0% of the bran dry weight and consisted of 88.1–89.2% neutral lipids, 6.3–7.0% glycolipids and 4.5–4.9% phospholipids. Neutral lipids consisted mostly of triacylglycerols (83.0–85.5%), monoacylglycerols (5.9–6.8%) and small amounts of diacylglycerols, sterols and free fatty acids. Three glycolipids and eight phospholipids were separated and characterized. Acylated steryl glucoside and digalactosyldiacylglycerol were the main glycolipids, while monogalactosylmonoacylglycerol was present in small amounts. The major phospholipids were phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol and phosphatidic acid. Phosphatidylglycerol, lysophosphatidylcholine, lysophosphatidylethanolamine and acyl-phosphatidylethanolamine were present in small quantities.
63 citations
TL;DR: In this article, an extraction of oil from rice bran with supercritical carbon dioxide (SC-C02) at pressures of 150 to 350 kg/cm2 G at 40°C was demonstrated.
Abstract: Extraction of oil from rice bran with supercritical carbon dioxide (SC-C02) at pressures of 150 to 350 kg/cm2 G at 40°C was demonstrated. The constituents of the selective fractions obtained at different pressures differed. Fractions obtained at higher pressures contained less free fatty acid and waxes or unsaponifiables. The phosphorus and iron contents were very low in the SC-C02 extracted oil, while the color of the oil was significantly lighter than that of hexane-extracted oil. The yield of low acid value oil was comparable to that for hexane extraction. One problem of the SC-C02 oil is its poor oxidation stability. This method of extraction may be effective in simplifying the processing of edible rice bran oil. Grinding the raw material was found to be effective in decreasing the C02 required and shortening the extraction period.
59 citations
TL;DR: In this article, Rice bran oils of 15 to 30% free fatty acid can be deacidified to low levels by reesterification with glycerol after degumming and dewaxing.
Abstract: Rice bran oils of 15 to 30% free fatty acid can be deacidified to low levels by reesterification with glycerol after degumming and dewaxing. The reesterification can by combined with conventional alkali neutralization and bleaching to produce light color edible oil.
43 citations
TL;DR: Of the oils tested, metsa oil (Hibiscus sabdariffa) and cashewnut shell liquid were mutagenic with and without metabolic activation with S-9 of either source, and no mutagenIC activity was observed with any of the other oils tested.
43 citations
TL;DR: Rice bran oil and double fractionated palm olein were heated at 180 C for 50 hours to measure lipid deterioration in the oils as discussed by the authors, and the results showed that the iodine value correlated very well with linoleic acid content with correlation coefficient higher than 0.96.
Abstract: Rice bran oil and double fractionated palm olein (DF palm olein) were heated at 180 C for 50 hr to measure lipid deterioration in the oils. Free fatty acid content of both oils increased during heating; however, iodine value and smoke point decreased. Solid fat contents of both oils were unaffected by heating time. Cloud point of rice bran oil was much lower than that of palm olein. Color of oils changed gradually to dark brown from light yellow with increased heating time. Absolute content of polyunsaturated fatty acid, such as linoleic acid, reduced more than that of monounsaturated fatty acid, such as oleic acid, in both oils. In both oils, iodine value correlated very well with linoleic acid content, with correlation coefficient higher than 0.96.
27 citations
TL;DR: These results could in part explain the geographical distribution of duodenal ulceration, where the incidence is high in all the rice eating areas of the world, and provide a plausible hypothesis to explain the mechanism of dietary ulcerogenesis.
Abstract: The ulcerogenic and protective effects of various rice fractions in the diet were studied in the pylorus ligated ulcer model in the rat. Oil present in rice and particularly rice bran becomes ulcerogenic on storage and in this model results in a significant increase in the median (range) numbers of ulcers from six (one to ten) to nine (six to 15) (P less than 0.05). The ulcerogenic effect of stored rice bran oil was reversed by cysteine which significantly reduced the ulcer incidence from 100% to 60% (P less than 0.005) and the numbers of ulcers from 26 (six to 70) to one (zero to four) (P less than 0.001). Fresh rice bran significantly reduced the numbers of ulcers from six (one to ten) to one (one to four) (P less than 0.05). Similarly, unmilled rice and freshly milled newly harvested rice was also shown to be protective in this model by significantly reducing the ulcer incidence from 87.5% to 50% and 0% respectively (P values less than 0.025) and the numbers of ulcers from three (zero to 17) to one (zero to one) and zero (zero to zero) respectively (P values less than 0.001). These results could in part explain the geographical distribution of duodenal ulceration, where the incidence is high in all the rice eating areas of the world, and provide a plausible hypothesis to explain the mechanism of dietary ulcerogenesis.
25 citations
TL;DR: In this article, a glass column percolator (i.d. 120 mm), packed to a depth of 90 cm and using n-hexane at 60 C and gravity feed was used for solvent extraction of rice bran.
Abstract: Rice bran was pretreated by hot air drying, steam cooking and extrusion before solvent extraction of oil. The extractions were conducted in a glass column percolator (i.d. 120 mm), packed to a depth of 90 cm and using n-hexane at 60 C and gravity feed. Fines (defined as<0.5 mm) in raw bran were significantly reduced by steam cooking and extrusion treatments. Extruded rice bran (ERB) was pelletized and had a bulk density 1.5 times higher than the other products. Regardless of the weight of bran loaded in the percolator, extraction time to reach 1% residual oil was decreased in the order of 116, 67 and 10 min for hot air-dried rice bran (HARB), steam-cooked rice bran (SRB) and ERB, respectively. This was due to increases in the percolation rate of SRB by 2 times and by 9 times for ERB compared to HARB. The solvent/bran ratio for extraction to 1% residual oil was decreased by nearly half, from 3.18 for HARB and 3.12 for SRB to 1.77 for ERB.
24 citations
TL;DR: In this article, a triphasic system was used to control water content in the process of glyceride production by lipase based on differences in boiling temperatures and reactions in a triphic system, and the results showed that the yield of monoglyceride was good when both esterification activity and transesterification were made to work in parallel.
Abstract: Reactions of glycerol and high free fatty acid (FFA) rice bran oil were carried out with lipase immobilized on an anion exchange carrier. The esterification activity of the reactions was estimated by decrease in acid values. This activity was high when the water content of the reaction mixture was 13 %. The relationship between water content in the reaction mixture and esterification activity depended on the lipase sources and the carriers on which the lipase was immobilized. Transesterification activity was estimated by successive analysis of glyceride components in the reaction products. The yield of monoglyceride was good when both the esterification activity and transesterification were made to work in parallel. The high FFA oil used contained 35 % free fatty acid and the reaction product contained 7 15 % FFA and 30.35 % monoglyceride. The methods for controlling water content in the process of glyceride production by lipase based on differences in boiling temperatures and reactions in a triphasic system are discussed.
13 citations
Patent•
22 Apr 1987
TL;DR: The authors describes a method of making nutritive oil by rice bran oil, rapeseed oil, cottenseed oil and tea-seed oil, which contains a considerable amount of linoleic acid, a necessary fatty acid for man and Vitamin E, cereal vitanin, carotin etc.
Abstract: The invention describes a method of making nutritive oil by rice bran oil, rapeseed oil, cotten-seed oil and tea-seed oil. The oil is refined according to different prescriptions. The product prepared by the invention is strictly tested, and it contains a considerable amount of linoleic acid, a necessary fatty acid for man, and Vitamin E, cereal vitanin, carotin etc. Taking it for a long period of time is beneficial to adjusting the functions of brain, lowering serum cholesterol and preventing arterial sclerosis.
4 citations
TL;DR: In this article, a coaxial cylindrical viscometer in the temperature range of 297-333 K was used to measure the viscoverage of crude rice bran oil with the wax content of 0.23-8.60 % wt/wt.
Abstract: Viscosity of crude rice bran oil with the wax content of 0.23–8.60 (% wt/wt) was measured using a coaxial cylindrical viscometer in the temperature range of 297–333 K. The crude oil behaved like pseudoplastic fluid obeying power law with consistency index k=2.0187×10(su−4) c0.2066 e2815/T and flow behavior index n=0.76, where c is the wax content and T is the temperature in Kelvin. Soy lecithin in the range of 1–2% did not affect the rheological properties.
Patent•
[...]
08 Aug 1987
TL;DR: In this paper, a sheet of tough Japanese paper is tied with a string to cover a vessel and fresh rice bran 2 is placed thereon Charocal fire 1 is then placed on the paper 6 to start smoking of the rice brans 2 When the whole temperature is reduced after a lapse of several hours or more, an extract 5, together with a black semisolid carbonized material, is precipitated The resultant precipitated liquid is used as an active ingredient to provide a remedy for scall, ring worm, alopecia areata, initial white spot disease, etc
Abstract: PURPOSE:To obtain a drug effective for treating dermatosis of the human body, by smoking rice bran with charcoal fire, etc, to afford an extracted liquid CONSTITUTION:A sheet of tough Japanese paper 6 is tied with a string to cover a vessel 4 and fresh rice bran 2 is placed thereon Charocal fire 1 is then placed on the paper 6 to start smoking of the rice bran 2 When the whole temperature is reduced after the lapse of several hr or more, an extract 5, together with a black semisolid carbonized material, is precipitated The resultant precipitated liquid is used as an active ingredient to provide a remedy for scall, ring worm, alopecia areata, initial white spot disease, etc, without particular side effect If the drug is applied to an affected part by a finger, etc, the itching is stopped within about 1 week - 10 days EFFECT:The material for the rice bran oil is readily purchased and the production is readily carried out
Patent•
25 Sep 1987
TL;DR: In this article, the authors proposed a method to provide the titled compsn. which has excellent flame retardance and hardly causes changes in volume resistivity with time, by blending a synthetic resin or a rubbery material with Al(OH)3 coated with linoleic acid (contg. material).
Abstract: PURPOSE:To provide the titled compsn. which has excellent flame retardance and hardly causes changes in volume resistivity with time, by blending a synthetic resin or a rubbery material with Al(OH)3 coated with linoleic acid (contg. material). CONSTITUTION:Al(OH)3 (a) having an average particle size of not larger than 25Xm is mixed with 0.02-5wt% linoleic acid or at least one linoleic acid-contg. material (b) selected from the group consisting of beef tallow fatty acid, vegetable oil such as cocount oil fatty acid, rice bran oil, soybean oil, tung oil and linseed oil and purified fatty acids thereof at a temp. of not lower than the m.p. of the component (b), but not higher than the decomposition point of the component (a) to obtain Al(OH)3 (b) coated with linoleic acid (contg. material). 100pts.wt. synthetic resin (e.g., PE) or rubbery material (e.g., butyl rubber) (A) having a volume resistivity of not lower than 1X10 OMEGAcm is blended with 30-500pts.wt. component B.
TL;DR: In this article, the authors trace the course of compositional changes undergone by rice bran oil during industrial hydrogenation, employing gas liquid chromatography and infra red spectroscopy.
Abstract: The Indian soap industry’s hard fat requirement was met until recent years by imported animal tallows. The search for alternate hard fats, consequent to the ban on the import of animal tallows in 1983, led to realization of the striking similarity in the fatty acid composition of mutton tallow and hydrogenated rice bran oil, except for thetrans oleic acid content. This paper traces the course of compositional changes undergone by rice bran oil during industrial hydrogenation, employing gas liquid chromatography and infra red spectroscopy.
Patent•
24 Jun 1987
TL;DR: In this paper, the authors describe a method to obtain resin particles which do not adhere to one another during pre-expanding and in which preexpanded particles are fused to each other during molding, by coating or impregnating expandable polystyrene resin particles with hydrogenated hardened rice bran oil.
Abstract: PURPOSE:To obtain resin particles which do not adhere to one another during pre-expanding and in which pre-expanded particles are fused to one another during molding, by coating or impregnating expandable polystyrene resin particles with hydrogenated hardened rice bran oil. CONSTITUTION:Resin particles are obtd. by coating or impregnating expandable polystyrene resin particles with hydrogenated hardened rice bran oil. The amount of the oil is 0.01-2.00wt% based on that of the resin particle. When the amount is less than 0.01wt%, no sufficient effect can be obtd. The amount exceeding 2wt% gives no increased benefits and a large quantity thereof has an adverse effect. Since the hydrogenated hardened rice bran oil is a long-chain substance having a large MW, it easily forms a film on the surfaces of the expandable polystyrene resin particles. Thus even when it is added during the course of the impregnation with a blowing agent or a polymn. reaction, an effect can be obtd., because the oil is liable to exist on the surfaces of the particles or in the vicinity of the surfaces thereof.