D. L. MAcFADDEN

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In their recent paper, Barbieri et a!. (1) presented a method for the determinaon of urocanic acid in urine after a histidine load. The method involved paper electrophoresis in a pyridineacetic acid buffer, pH 5.4, and quantitation was based on the Pauly reaction. Mean values presented for urocanic acid excretion in the 8 h after a 15-g histidine load were(More)
The widespread use of antibiotics as therapeutic agents against pathogenic bacteria sometimes has presented a problem as the result of the development of drug resistance by the organism involved (Finland, 1956). Although the level of an antibiotic necessary to elicit a growth response in young animals is many times less than the therapeutic dose, drug-fast(More)
The widespread use of antibiotics as therapeutic agents against pathogenic bacteria sometimes has presented a problem as the result of the development of drug resistance by the organism involved (Finland, 1956). Although the level of an antibiotic necessary to elicit a growth response in young animals is many times less than the therapeutic dose, drug-fast(More)
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