Buscar
Mostrando ítems 1-10 de 134
Coriolis coupling constants of cis and trans-1,2-dichloroethylene
(1975)
Coriolis coupling constants and the inertia defect for cis- and trans-1,2-dichloroethylene have been calculated, using force constants obtained by the iterative consistency method. The results obtained are compared with ...
Costunolide and Flavonols from Gochnatia Foliosa Var. Fascicularis
(1984)
As part of a systematic chemical investigation of Chilean Compositae (1-3), we examined the secondar chemistry of a member of the genus Gochnatia (tribe Mutisieae, subtribe Gochnatiinae): Gochnatia foliosa var. fscicularia ...
Rapid Methods in Analytical Chemistry
(2012)
This article presents the most recent research in analytical chemistry concerning the development of rapid methodologies covering the period from 2009 up until today. In this context, different useful analytical methods ...
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 ...