IMMUNOCHEMICAL STUDIES ON THE NITROGENOUS CONSTITUENTS OF BEER FOAM*

Abstract

Samples of foam prepared by two different procedures were analysed using immunoelectrophoretic methods with anti-barley and anti-chill haze immune sera and their constituents were compared to those of beer (total and defoamed) and of chill-haze. Two, and probably three, constituents reacting with the immune sera have been detected in both foam preparations and it was shown that at least two of the constituents are identical with the main nitrogenous components of chill-haze. Defoamed beer contains the same substances but at a low concentration when compared on the basis of weights of dry matter. These observations may have some practical applications.