Reference

Different physicochemical factors which influence the concentration measurements of fluorescent tracers and their practical uses in hydrology

Different physicochemical factors which influence the concentration measurements of fluorescent tracers and their practical uses in hydrology. Andre, J. C.; Molinari, J. (Lab. Chim. Gen., CNRS, Nancy, Fr.). J. Hydrol. (Amsterdam), 30(3), 257-85 (French) 1976. CODEN: JHYDA7. DOCUMENT TYPE: Journal CA Section: 61 (Water) The use of fluorescent xanthenic tracers, e.g. fluorescein [2321-07-5], rhodamine B [81-88-9], rhodamine WT [37299-86-8], and sulforhodamine G [5873-16-5], in hydrol. studies and environment depends on the nature of the solvent, pH, temp., and the presence of mineral salts. The difficulties of interpreting the measurements of concn. of the fluorescent-tracer elements collected on activated C are discussed and a method of measurement by selective extinction is described.

Antibacterial effect, plasmid curing activity, and chemical structure of some tricyclic compounds

Antibacterial effect, plasmid curing activity, and chemical structure of some tricyclic compounds. Molnar, J.; Mandi, Yvette; Holland, I. B.; Schneider, G. (Inst. Microbiol., Univ. Med. Sch., Szeged, Hung.). Acta Microbiol. Acad. Sci. Hung., 24(1), 1-6 (English) 1977. CODEN: AMAHA5. DOCUMENT TYPE: Journal CA Section: 3 (Biochemical Interactions) Imipramine (I) [50-49-7], amitriptyline [50-48-6], and diethazine [60-91-3] were bacteriostatic for a variety of strains of bacteria. A dose-dependent bactericidal activity was shown with Escherichia coli, and subinhibitory concns. of the drugs produced up to a 70% curing efficiency for the F'lac plasmid of E. coli. Chlorpromazine sulfoxide [969-99-3] and fluorescein [2321-07-5] lacked the antibacterial and plasmid-curing activities. Comparisons of the structures of these tricyclic compds. suggest that the absence of activity was assocd. with an O atom present in the middle ring (fluorescein) or linked to the ring (chlorpromazine sulfoxide). Antibacterial and plasmid-curing activities apparently depend on the charge distribution of the tricyclic ring.