Gastric absorption of 3,4-benzpyrene. II. The significance of the solvent for the penetration of 3,4-benzpyrene into the stomach wall.

properties. In these studies a large number of solvents were employed for the administration of 3,4-benzpy rene. The solutions of the hydrocarbon were in stilled into the stomachs of mice and cats and the rate of the absorption of the fluorescent carcinogen determined directly in the wall of the stomach in the manner described in the first paper of this series (7). The intensity of fluorescence in the wall of the glandular stomach was estimated by using an arbitrary gradation (Fig. @, preceding paper).