Oxidation of N-methyl-gamma-tocopheramine to a nitroxide.

An unstable nitroxide identified by electron paramagnetic resonance spectra was obtained by oxidation of N-methyl-gamma-tocopheramine with peroxide and also by ultraviolet photooxidation.

The lipids of krill (Euphausia species) and red crab (Pleuroncodes planipes).

The composition of the lipids of two samples of krill and one of "red crab" was determined by thin layer, column and gas chromatographic procedures. A large number of unusual fatty acids were present.

Comparison of antioxidant activities of tocol and its methyl derivatives.

In tests with purified menhaden oil at 37C and with squalene at 37C and 50C, unsubstituted tocol, 7,8-dimethyl tocol (gamma-tocol), and 8-methyl tocol (sigma-tocol) were superior antioxidants to 5,7-dimethyl tocol and 5,7,8-trimethyl tocol (alpha-tocol). In contrast to previous reports, there were no differences in the order of the activities of the tocopherols at different temperatures.

Comparison of column chromatographic methods for the quantitative determination of mono- and digalactodiglycerides in fresh alfalfa (Medicago sativa).

Three column chromatographic procedures for separating and recovering the galactolipids in fresh alfalfa extracts were compared. Silicic acid chromatography yielded pure fractions by thin-layer chromatography, infrared absorption, and chemical analysis. The carbon-Celite column gave the highest yield of monogalactodiglyceride.