Etude polarographique de la salive

Abstract

AbstractDiluted human saliva in an ammonia buffer solution and in presence of CoII gives three catalytic waves, whilst blood serum, under the same conditions, gives only two waves. Saliva presents the first two waves only in the presence of CoII, but the third wave appears in buffer solution with or without CoII. After denaturation with potassium hydroxyde under the given conditions the third wave disappears completely, whilst the first and the second waves augment. Saliva changes its properties when kept; the stability of the waves is diminished in regressive order from h, to h,. After simple dialysis the second and third waves disappear, whilst the first wave does not change. After electrodialysis during two and a half hours, the first wave disappears, but the third wave is hardly changed. The water used for the simple dialysis has also been examined under the polarograph; this gave only the second and the third waves, but the behaviour of the third wave with or without CoII is quite different from the behaviour of h, taken from a saliva which has not been dialysed. By addition of cystine or cysteine to the saliva, the third wave increases when CoII is present, but it decreases in the absence of this ion.