A colorimetric method for the determination of the principal metabolites of nicotinic acid in human urine

Abstract

moderate mnoderate film pressures film pressures film pressures (1 -6 m.'I mg:-') (< 1 -0 M., mg.-) (1-6 m.1 mg.-') (a) (b) Fig. 4. Orientations of the -(CH2)4NH2 chains in proteins at (a) the oil-water interface, and (b) the air-water interface.