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Interaction of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (dimboa) with alcoholic solvents
(1986)
Solubilities and IR spectra of DIMBOA in alcoholic solvents showed that the carbonyl group of DIMBOA is hydrogen-bonded to the solvent. Activation parameters of DIMBOA in the same solvents suggested that the decomposition ...
Decomposition of 7-nitro-2,4-dihydroxy-1,4-benzoxazin-3-one in aqueous solutions
(1991)
Kinetic and product studies indicate that the title compound decomposes in aqueous solutions to give 5-nitro-2-aminophenol with the intermediacy of N-(2-hydroxy-4-nitrophenyl)carbamic acid. © 1991.
Substituent effects in frontier orbitals of cyclic hydroxamic acids
(1994)
AM1 full geometry optimization of seven substituted cyclic hydroxamic acids (Hx) was performed. A qualitative correlation between Elumo vs Hammett's σP was observed. The reactivity of these 7-substituted Hx with hard ...
Quimica Analítica Instrumental
(Universidad de Belgrano. Programas de las Materias - Facultad de Ciencias Exactas y Naturales - Carrera de Farmacia, Plan 2012)
OBJETIVOS:
Proveer al alumno con los conocimientos de técnicas analíticas e instrumental empleado en el desarrollo de las distintas actividades profesionales de las carreras pertinentes. El estudio comprenderá las bases ...
Isocedrene and guaiane derivatives from pleocarphus revolutus
(1988)
A reinvestigation of the aerial parts of Pleocarphus revolutus afforded, in addi tion to sesquiterpenes isolated previously, four new guaiane derivatives and four isocedrene derivatives, one of which is new. Furthermore, ...
Activity of boldine on rat ileum
(1991)
Boldine shows a concentration-dependent relaxation effect on the rat ileum preparation with a pD2 of 3.77 ± 0.12. The alkaloid also produces a concentration-dependent parallel shift of the curve-response to acetylcholine, ...
Polarographic behaviour and determination of ranitidine in pharmaceutical formulations and urine
(1994)
A polarographic method for the determination of ranitidine is described, based on the reduction of the nitro group at a dropping-mercury electrode. The proposed method permits the drug to be determined, without any prior ...