abstract: in this study the non-saponifiable matter of oils extracted from nine varieties of sunflower seed were subjected a series of chemical tests. the non-saponifiable matters were fractionated into a number of chemical classes of compounds namely sterols, 4 methyl sterols, triterpene alcohols, tocopherols and hydrocarbons. the two major and important classes of compounds consisting of ster...

Gamma tocopherol content of 7 Iranian sesame seeds (sesamum indicum L.) was determined by high performance liquid chromatography using C8 column and methanol, water and butanol as mobile phase. The gamma-tocopherol content varied from 563 to 1095 mg/kg in oil and 293 to 569 mg/kg in sesame seed and was in broad agreement with the Codex range. A large variation was found in the concentration of ...

Abstract Background Direct measurement of the bioavailable α-tocopherol content presents a significant analytical challenge and requires chiral separation stereoisomers. Objective The objective study was to validate an method for analysis stereoisomers in infant formulas dairy products. Method Samples were saponified at elevated temperature lipophilic components extracted into organic solvent, ...

The effect of dietary RRR-g-tocopherol supplementation on serum and tissue aand g-tocopherol concentrations was studied in vitamin-E-deficient rats fed diets containing adequate levels of RRR-a-tocopherol and graded levels of RRR-g-tocopherol over a 60 day period. Feeding rats with a RRR-a-tocopherol-supplemented diet induced in forebrain, sciatic endoneurium, skeletal muscle, heart and liver a...

BACKGROUND Some studies have shown potential benefit of vitamin E on platelet function, but several clinical trials failed to show improved cardiovascular outcome with alpha-tocopherol supplementation. Gamma-tocopherol, a major dietary form of vitamin E, may have protective properties different from those of alpha-tocopherol. OBJECTIVE We compared the effects of supplementation with alpha-toc...

BACKGROUND Alpha-Tocopherol and gamma-tocopherol are the two major forms of vitamin E in human plasma and the primary lipid soluble antioxidants. The dietary intake of gamma-tocopherol is generally higher than that of alpha-tocopherol. However, alpha-tocopherol plasma levels are about four fold higher than those of gamma-tocopherol. Among other factors, a preferential cellular uptake of gamma-t...

In contrast to strong epidemiologic, preclinical, and secondary clinical evidence for vitamin E (tocopherols) in reducing cancer risk, large-scale clinical cancer-prevention trials of a-tocopherol have been negative. This vexing contrast helped spur substantial preclinical efforts to better understand and improve the antineoplastic activity of tocopherol through, for example, the study of diffe...

Twenty-four crossbred beef cows were used to investigate the concentration of alpha-tocopherol in plasma and tissues following oral administration of four tocopherol sources. Animals were allotted to the following treatments: DL-alpha-tocopherol, D-alpha-tocopherol, DL-tocopheryl acetate and D-alpha-tocopheryl acetate. Animals received a daily oral dose of 1,000 IU of the respective tocopherol ...

The oxidative modification of low density lipoprotein (LDL) may play an important role in atherogenesis. Antioxidants that can prevent LDL oxidation may act as antiatherogens. Our understanding of the mechanism of LDL oxidation and factors that determine its susceptibility to oxidation is still incomplete. Copper is a candidate for oxidizing LDL in atherosclerotic lesions. The binding of copper...

serum alpha-tocopherol of98(62 male and 36 female) cancer patients and 30 (13 male and 17 female) control healthy subjects was investigated. the cancer patients showed a significantly low level of alpha-tocopherol as compared to control healthy subjects. also, significantly higher levels of serum alpha-tocopherol were found in complete remission patients as compared to the partial response pati...