33 documents found, page 1 of 4

Screening of plants found in the State of Amazonas, Brazil for activity against...

Made available in DSpace on 2021-07-14T10:41:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2004. Added 1 bitstream(s) on 2021-07-14T11:36:07Z : No. of bitstreams: 1 S0044-59672004000100012.pdf: 277183 bytes, checksum: 7e7a8289dcd98d1df6c2879e5159ad69 (MD5); Extratos aquosos, etanólicos e metanólicos, representando principalmente espécies vegetais nativas encontradas na região Amazônica, foram preparados,...

Chemical constituents from stems of simaba guianensis subesp. ecaudata (cronquist)

Simaba guianensis subesp. ecaudata (Simaroubaceae) is a tree found in the Brazilian Amazon. This work describes for the first time the fractionation of stems of this species that resulted in the isolation of the cytotoxic triterpene piscidinol A, the alkaloid 9-methoxycanthin-6-one, caryophyllene oxide, also isolated for the first time from this species and a new alkaloid (6-methoxy-(9H-β-carbolin-1-il)-(Z)-2-p...

Indolealkalaloids from the bark of Aspidosperma vargasii and A. desmanthum

Fractionation of extracts resulted in isolation and identification of indole alkaloids ellipticine and N-methylteti:ahydroellipticine from. A. vargasii and aspidocarpine from A. desmanthum. Identification of these compounds was achieved based on IR, MS, 1H, 13C and 2-D NMR data and comparison to data in the literature.

Aromatic compounds from three brazilian lauraceae species

Phytochemical investigations on three Brazilian Lauraceae species from, the Cerrado region of São Paulo State, Ocotea corymbosa (Meins) Mez., O. elegans Mez. and Persea pyrifolia Nees & Mart. ex Nees resulted in the isolation of flavonoids, an ester of the 4-O-E-caffeoylquinic acid, an aromatic sesquiterpene besides furofuran lignans. This is the first chemical study on the leaves of Ocotea elegans and O. corym...

Larvicidal Activities against <i>Aedes aegypti</i> and <i>Culex quinquefasciatu...

Screening Of Plants Found In The State Of Amazonas, Brazil For Larvicidal Activ...

Screening of plants found in the State of Amazonas, Brazil for activity against...

Extratos aquosos, etanólicos e metanólicos, representando principalmente espécies vegetais nativas encontradas na região Amazônica, foram preparados, respectivamente, por infusão, maceração e extração contínua líquido-sólido, seguida de evaporação e liofilização. Os extratos liofilizados foram testados para atividade contra larvas de Aedes aegypti, na concentração única de 500 mg / mL. Os extratos metanólicos f...

Screening of plants found in Amazonas State for lethality towards brine shrimp

Foram testados 226 extratos metanólicos e aquosos de 74 espécies vegetais (a maioria nativas) encontradas no Estado do Amazonas, Brasil, para letalidade às larvas da espécie microcrustácea Artemia franciscana na concentração teste de 500 μg/mL. Várias espécies citotóxicas foram identificadas nesse estudo: Aspidosperma marcgravianum, A. nitidum, Citrus limetta, Croton cajucara, Geissospermum argenteum, Minquarti...

Comparative in vitro and in vivo antimalarial activity of the indole alkaloids ...

Indole alkaloids ellipticine (1), cryptolepine triflate (2a), rationally designed 11-(4-piperidinamino)cryptolepine hydrogen dichloride (2b) and olivacine (3) (an isomer of 1) were evaluated in vitro against Plasmodium falciparum and in vivo in Plasmodium berghei-infected mice. 1-3 inhibited P. falciparum (IC50 ≤ 1.4 μM, order of activity: 2b > 1 > 2a > 3). In vitro toxicity to murine macrophages was evaluated ...

Characterization of bergenin in endopleura uchi bark and its anti-inflammatory ...

Endopleura uchi (Huber) Cuatrec. is an Amazon species traditionally used for the treatment of inflammations and female disorders. Pure bergenin was isolated from the methanolic extract of bark of E. uchi, firstly by using liquid-liquid partition chromatography followed by column chromatography over Sephadex LH-20 and then silica gel 60 flash chromatography. The structure of bergenin was identified on the basis ...