Bacteria which are sulfonamide-sensitive have been reported to be incapable of the rapid utilization of folic acid for inhibition reversal (Alimchandani and Sreenivasan, J. Bacteriol. 73:538, 1957; Krieg and Pelczar, J. Bacteriol. 80:242, 1960; Davis and Feingold, p. 343. In I. C. Gunsalus and R. Y. Stanier [ed.], The Bacteria, vol. 4, Academic Press, Inc., New York, 1962), presumably because o...

Sulfonamides were extracted from honey with acetate buffer (pH 5.0), and cleaned up by solid phase extraction (SPE) procedure. The liquid chromatography (LC) separation was carried out on RP C18 column using acetic acid and acetonitrile as the mobile phase in gradient mode and monitored with fluorescence detector, after pre-column derivatisation. Recoveries from spiked honey were above 80%, and...

Sorption of sulfamethazine (SMN) and sulfathiazole (STZ) was investigated in three soils, a North Carolina loamy sand, an Iowa sandy loam, and a Missouri loam, under various pH conditions. A significant increase in the sorption coefficient (KD) was observed in all three soils, as the sulfonamides converted from an anionic form at higher pH to a neutral/cationic form at lower pH. Above pH 7.5, s...

Sulfonamides (SA) are a class of antibiotics routinely found in environmental matrices and therefore their role as contaminants should be investigated in non-target organisms. With this purpose the present experimental work has evaluated the exposure of the chlorophycean Ulva lactuca L. to sulfathiazole (STZ), a SA drug commonly used in aquaculture, at two concentrations representing prophylact...