III. Studies on Germicidal Substances

PRESSOR SUBSTANCES IN ARTERIAL HYPERTENSION III. CHEmCAL STUDIES ON PHERENTASIN*

In the first paper of this series (1) the presence of a material producing a prolonged pressor response in rats was demonstrated in crude non-protein extracts of arterial blood samples from hypertensive subjects. This study has been extended and confirmed and the pressor substance named pherentasin (2). The present report is concerned with further purification of this material and with methods ...

A New Method for the Evaluation of Germicidal Substances.

Studies on Bacillus Typhosus Toxic Substances

A phenomenon of local skin reactivity to B. typhosus culture filtrates is described in this report. The reactivity was induced by skin injections of the filtrate followed 24 hours later by an intravenous injection of the same filtrate. The local response consisted of severe hemorrhagic necrosis and was fully developed 4 to 5 hours after the second injection. About 78 to 79 per cent of the rabbi...

Studies on Alternatives to Brominated and Chlorinated Substances

Less know-how is generally available with regard to the presented alternatives than for the traditionally brominated flameretarded printed circuit boards. The available information however shows that the substitution of brominated flame protection in printed circuit boards is both possible and sensible. This is supported by the available information about the substitutes and the by-products of ...

Studies on the Oxidation and Reduction of Immunological Substances

The "spontaneous deterioration" of streptolysin has been studied by the methods already used in investigations of the oxidation-reduction of blood pigments and of the lysins of other bacteria. From the results of this study, it may be concluded that the commonly observed "spontaneous deterioration" of streptolysin consists in the conversion of the originally active lysin to a hemolytically inac...