IN an earlier communication 1 a medium was briefly described which had been developed at the Laboratories of the Metropolitan Water Board for the isolation of certain strains of Streptococcus faecalis ...
IT was shown by Tanaka et al. 1,2 that 5-arylazo pyrimidines having different groups (for example, hydroxyl, methyl or amino) at the 2, 4 and 6 positions are strong folio acid antagonists and that ...