Methods for the determination of urea in biological fluids have passed through an interesting cycle (cf. Peters and Van Slyke (3) pp. 539-544). The earliest procedures were strictly chemical ones, involving precipitation of the urea as an insoluble mercury complex or decomposition of the urea by means of heat or hypobromite. The use of the highly specific enzyme urease occurring in the jack and...

The stimulant effects due to several indolylalkylhydroxylamines in mice were shown to resemble closely in degree and in time course those of the corresponding indolylalkylamines . The hydroxylamine derivatives were shown to be inactive as inhibitors of monoamine oxidase, and of the uptake of amines in vitro, properties which had been suggested as responsible for the stimulant actions of the ami...