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A dietary regimen is described whereby large hyperplastic nodules can be obtained in over half the rats fed either of the two hepatocarcinogens, ethionine or 2-fluorenylacetamide. The nodules are(More)
Isotope discrimination is a common feature of biosynthesis in nature, with the result that different classes of carbon compounds frequently display different (13)C/(12)C ratios. The (13)C/(12)C ratio(More)