Effect of rosemary leaves on autooxidation of purified corn and soybean triacylglycerols

Antioxidant activity of dry ground rosemary [Rosmarinus officinalis L.] leaves of particle size /= rosemary> TBHQ> carnosic> alpha-tocopherol> BHA. In SO TAG the inhibiton order was rosemary > Trolox> TBHQ>carnosic>alpha-tocopherol>BHA

Influence of packaging materials on the oxidative stability of stripped soybean oil

Stripped soybean oil was used to investigate the effect of different packaging materials on photooxidation stability. Four packaging materials were used, two glass [clear and amber] and two plastic [low density polyethelene PE and polyethylene terephthalate PET]. Clear glass caused the highest hydroperoxide formation followed by PE and PET while amber glass caused the least one, since it excluded most of the incident light responsible for photoxidation, hence retarding it and decreasing off-flavour development. Also polyethylene terephthalate gave more inhibition of hydroperoxide than polyethylene. Polyethylene and polyethylene terephthalate packaging materials although they cause some of their constituents to migrate into edible oils, the over all amount migrated from them still below the international permitted level

Optimum conditions of extracting the fat absorbed with the exhausted earth

Three different spent clay samples named spent clay produced from bleaching of hydrogenated oil [I], spent clay produced from bleaching of oil then filtered through normal non closed filter [II] and spent clay produced from bleaching of oil then filtered through closed filter [III] were available from the Extracted Oil Company and investigated in laboratory. Many factors like the effects of different solvents, time of extraction, temperature of heating and solvent to clay ratio on the percentage of oil extracted were investigated. The aim of this study is to estimate the optimum conditions for recovering the maximum oil as a waste of oil industry from the spent clay. The authors found that n-hexane and petroleum ether 60/80 at 70°C, 6 hr heating and clay [solid]: solvent [liquid] ratio 5:95 w/v gave the highest percentage of oil recovery. The physical and chemical characteristics of the oils of the three samples were determined. The results indicated using these oils for industrial purposes

Column chromatographic fractionation of soybean phospholipid and chemical analysis of isolated phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, phosphatidic acid and cerebroside

Phospholipid mixtures were isolated from crude soybean oil and laboratory prepared soy lecithin were fractionated on two silicic acid columns with subsequent thin layer chromatography identification of isolated fractions. The percentages of the isolated four eluted fractions from each of the two columns were calculated. Phosphatidylcholine, phosphatidylethanolamine phosphatidylinositol, phosphatidic acid and cerebroside were isolated. Fatty acid composition and total phosphorus of the isolated phospholipids were determined