Fluorometric Determination of Chlortetracycline

Abstract

Hill and coworkers (8) on the oven drying of fresh and aged superphosphate.Two further experiments showed that the calcium sulfate in a fresh sample of single superphosphate was mostly not in the form of dihydrate and that it was resistant to hydration. In the first experiment a 100-gram sample was washed with 1.5 liters of water and dried in an air stream at 60°C. The dried sample contained 3.2% phosphorus pentoxide and yielded 1.0% moisture and only 2.5% water of crystallization on distilling with benzene and xylene, thus showing that the calcium sulfate in the superphosphate

Inhibition of the Incorporation of Chloride Into the Tetracycline Molecule

“…Analytical methods. Fermentation broths were assayed for chlortetracycline by the fluorometric method of Feldman et al, (1957) and for tetracycline by a modification of the method of Hiscox (1951).…”

Biosynthesis of Tetracyclines

“…The concentration of 7-chlorotetracycline was determined by fluorometric assay as described by Feldman et al (1957). The values reported are the averages from fermentations run in triplicate.…”

Effect of Temperature on the Coproduction of Chlortetracycline and Tetracycline by Streptomyces aureofaciens

“…Analytical methods. Where CTC was produced as a major component, it was quantitatively determined by the method of Feldman et al (4) and by a modification of the method of Hiscox (6). When TC occurred as a major component it was quantitatively determined by an appropriate modification of the method of Hiscox.…”