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For analysis of petroleum oils with modified Ames test (ASTM method E1687-19 ), the required positve control - Reference Oil No.1 (HC 235) - is now... [read more]

...for the phenotype confirmation of E.coli WP2. Tests for tryptophan auxotrophy & pKM101 presence in the Ames assay. [read more]

. . phenotype characteristics listed by the OECD 471 guideline in any of the E. coli and Salmonella strains used in the Ames test! [read more]