Relation between Kolbe Reaction and Hydrogen Ion Concentrations

The Equilibrium between Hemolytic Sensitizer and Red Blood Cells in Relation to the Hydrogen Ion Concentration

1. In a salt-free medium the proportion of the total amount of hemolytic sensitizer present, combined with the homologous cells, reaches a maximum of almost 100 per cent at pH 5.3. On the alkaline side of this point the proportion combined diminishes with the alkalinity and reaches a minimum of approximately 5 per cent at pH 10. On the acid side of pH 5.3 the proportion combined diminishes with...

Hydrogen ion concenteration of the root media in relation to transpiration rates

Hydrogen Ion Concentrations within the Alimentary Tract of Insects

Larvae of Psychoda and of Chironomus (diptera) maintained in solutions of appropriate indicators show that the typical acidities (pH) prevailing within the several regions of the digestive tract are: esophagus 7.1; cardiac chamber 6.2; mesenteron 7.5; the latter being functionally an intestine. The acidity of the hindgut, pH 6.4, is due to the discharge of the malphigian tubules.

Hydrogen Ion Concentrations in the Blood of Insects

The range of pH values for the blood of grasshoppers and of houseflies is 7.2 to 7.6. The range of values for roaches is 7.5 to 8.0. The range for Malacosoma americanum is 6.4 to 7.4; and the range for Bombyx mori is 6.4 to 7.2. From the work of other investigators and from the writer's results, it is apparent that the pH of insect blood, in general, may vary between 6.4 and 8.0. In the forms o...

Hydrogen Ion Concentrations within the Ali- Mentary Tract of Insects

There has been a good deal of discussion as to the digestive and absorptive functions respectively pertaining to the several divisions of the intestinal tract of insects. The actual acidifies prevailing in the various regions of the gut are of special moment. Among other points of interest, questions arise as to the conditions of enzyme activity within the gut, and as to the possible r61e of su...