Über ionale Einwirkungen auf die Alterung im Muskelpreßsaft, insbesondere über den Einfluß der Wasserstoffionenkonzentration.

Abstract

The ability of minced muscle to cause the disappearance of inorganic phosphate in the presence of NaF diminishes with time. The synthesizing ability of expressed muscle juice does not diminish so rapidly. The preservation of synthesizing ability by the expressed muscle juice seems related to its greater acidity. Addition of NaHCO3 to expressed muscle juice accelerates the ageing. Sodium hydroxide has the same effect. The accelerated ageing goes with diminished pH as determined by the chinhydrone electrode. Ammonia retards the ageing process, at least in dilute solutions. Lactic acid preserves the synthesizing ability, but CO2 rapidly diminishes it. Expulsion of the CO2 with air completely reverses the injurious effect of CO2 on synthesizing power. These changes are considered to be related to alteration by the ions of the colloidal condition.