lthough many of the solvent properties of water can be explained in terms of the uncharged H2O molecules,the small degree of ionization of water to hydrogen ions (H) and hydroxide ions (OH ) must also be taken into account. Like all reversible reactions, the ionization of water can be described by an equilibrium constant. When weak acids or weak bases are dissolved in water, they can contribute...

The results embodied in this report were obtained as preliminary data for a systematic study of the magnitude of errors produced by the presence of various substances in the use of phenol red for calorimetric determinations of hydrogen ion concentration in biological fluids. Neutral salts, present in all body fluids, are known to have an influence on dye color. There are available many tables o...

The results embodied in this report were obtained as preliminary data for a systematic study of the magnitude of errors produced by the presence of various substances in the use of phenol red for calorimetric determinations of hydrogen ion concentration in biological fluids. Neutral salts, present in all body fluids, are known to have an influence on dye color. There are available many tables o...

The results embodied in this report were obtained as preliminary data for a systematic study of the magnitude of errors produced by the presence of various substances in the use of phenol red for calorimetric determinations of hydrogen ion concentration in biological fluids. Neutral salts, present in all body fluids, are known to have an influence on dye color. There are available many tables o...

1. It had been shown in previous papers that when a collodion membrane has been treated with a protein the membrane assumes a positive charge when the hydrogen ion concentration of the solution with which it is in contact exceeds a certain limit. It is pointed out in this paper that by treating the collodion membrane with a protein (e.g. oxyhemoglobin) a thin film of protein adheres to the memb...

1. The reaction of the catfish, Schilbeodes gyrinus Mitchill, to hydrochloric acid over a wide range of concentrations (from pH 1.82 to pH 6.83) has been studied under experimental conditions which reduced to a minimum all other stimuli. 2. As the [H(+)J increases within the limits mentioned, the reaction time of the fish decreases. In other words, the rate of the stimulation processes is an in...

THE electrocardiographic response in man to acute changes in blood hydrogen ion concentration has not been well defined. Although the effects of an acute alteration in blood pH have been studied in dogs and isolated heart preparations, -4 examinations in man have usually been limited to clinical situations in which disturbances in serum electrolytes occurred along with deviations in hydrogen io...