Societies and Academies

Abstract

LONDON. Society of Public Analysts, Oct. 5.—A. Chaston Chapman: The oil of Centrophorus granulosus. The liver oil of the Portuguese shark ‘barroso’ (Centrophorus granulosus) contains the unsaturated hydrocarbon, spinacene, an alcohol probably identical with th batyl alcohol found in Japanese shark oils, liquid alcohol (selachyl alcohol, C21H40O3), cholesterol and glycerol (0.5-0.6 per cent.), together with stearic, palmitic, and oleic acid, and possibly smaller proportions of other saturated and unsaturated fatty acids.—W. R. Schoeller and E. C. Deering: The separation of titanium from tantalum and niobium. The method is based on the dissociation of the soluble tartaric complexes of the metallic acids by a mineral acid; the earth acids are precipitated, whilst the titanic salt remains in solution. The results as yet obtained are approximate.—C. L Hinton and T. Macara: The determination of aldose sugars by means of chloramine-T, with special reference to the analysis of milk products. Each molecule of chloramine-T is equivalent to two atoms of iodine, both in the oxidation of sugar and in the final liberation of iodine on acidifying. The oxidation proceeds more slowly than that with alkaline iodide solution. The most suitable conditions for the oxidation of dextrose and lactose have been worked out, and the extent of the slight oxidation of sucrose and hevulose under standard conditions has been determined. Under the conditions specified, the action of chloramine-T on the non-sugar coflstituents of milk serum does not cause an error greater than 0.4 per Cent. of the total lactose.