Now showing items 1-10 of 20
Mutagenic and cytotoxic activity of an isocoumarin (Paepalantine) isolated from Paepalanthus vellozioides
(Teratogenesis Carcinogenesis and Mutagenesis, 1997-01-01) [Artigo]
A new isocoumarin with antimicrobial activity was isolated from Paepalanthus vellozioides (a native Brazilian plant) and called paepalantine. This study was carried out to assess the mutagenic activity of this new agent ...
Composition of the volatile compounds from Aniba canelilla (H. B. K.) Mez. extracted by CO2 in the supercritical state
(Revista Brasileira de Farmacognosia, 1998-01-01) [Artigo]
Os constituintes químicos voláteis das cascas de Aniba canelilla (H. B. K.) Mez. (Lauraceae), obtidos por SFE-CO2 (extração com fluido supercrítico utilizando CO2), foram analisados por HRGC-FID (cromatografia gasosa de ...
Constituents of Cassia rugosa
(Fitoterapia, 1993-01-01) [Artigo]
AN ISOCOUMARIN DERIVATIVE FROM PAEPALANTHUS BROMELIOIDES
(Acta Crystallographica Section C: Crystal Structure Communications, 1994-08-15) [Artigo]
The structure of 5,7,9,10-tetramethoxy-3-methyl-1 H-naphtho[2,3-c]pyran-1-one, C18H18O6, a derivative of a natural isocoumarin isolated from Paepalanthus bromelioides, was determined by X-ray analysis, which unequivocally ...
A 1H and 13C NMR study of a novel naturally occurring furocoumarin from Dorstenia cayapiaa
(Spectrochimica Acta Part A: Molecular Spectroscopy, 1992-10-01) [Artigo]
The chemical structure of a naturally occurring furocoumarin from Dorstenia cayapiaa (1) has been established by 1D and 2D NMR methods. © 1992.
Efeito da densidade populacional sobre as curvas de crescimento de Macrobrachium rosenbergii (De Man) em cultivo semi-intensivo (Crustacea, Palaemonidae)
(Revista Brasileira de Zoologia, 1993-01-01) [Artigo]
In this article the length growth curves of Macrobrachium rosenbergii (De Man, 1879) held in different population densities were analysed. Postlarvae prawns were stocked into five 0,02 ha earthen ponds at densities of 4, ...
Antibiotic 26-deoxylaidlomycin isolated from Streptomyces sp. Ar386 from Brazilian soil
(Revista Latinoamericana de Microbiologia, 1996-12-01) [Artigo]
An actinomycete strain (Ar386) was isolated from the soil of the Araraquara regio, SP, Brazil. The strain, named Streptomyces jacareensis, formed irregular rayed, rugose, grayish-white mycelium with sinuous, branched hyphae ...
Quercetagetin 7-methyl ether glycosides from Paepalanthus vellozioides and Paepalanthus latipes
(Phytochemistry, 1999-06-01) [Artigo]
Several new quercetagetin 7-methyl ether glycosides were characterized from the ethanolic extracts of scapes and leaves of Paepalanthus vellozioides and P. latipes. Their structures were determined mainly by 600 MHz NMR ...
Gas chromatographic analysis of indole alkaloids from Tabernaemontana hilariana
(Journal of Chromatography A, 1997-11-14) [Artigo]
A fast and efficient procedure was elaborated to identify the alkaloid constituents from Tabernaemontana hilariana (Apocynaceae). The strategy based on fractioning of the crude alkaloid fraction in small silica cartridges ...
New naphthopyranone glycosides from Paepalanthus vellozioides and Paepalanthus latipes
(Journal of Natural Products, 1999-05-01) [Artigo]
Three new compounds-3,4-dihydro-10-hydroxy-7-methoxy-3-(R)-methyl-1H-3,4-dihydronaphtho-]2,3c]pyran-1-one-9-O-beta-D-glucopy ranoside (1), 3,4-dihydro-10-hydroxy-7-methoxy-3-(R)-methyl-1H-3,4-dihydronaphtho-[2,3c]-pyran- ...