16 documents found, page 1 of 2

Adulticidal activity of dillapiol and semi-synthetic derivatives of dillapiol a...

Stability and antioxidant activity of semi-synthetic derivatives of 4-nerolidyl...

4-nerolidylcatechol (4-NC) is an unstable natural product that exhibits important antioxidant, anti-inflammatory and other properties. It is readily obtainable on a multi-gram scale through straightforward solvent extraction of the roots of cultivated Piper peltatum or P. umbellatum, followed by column chromatography on the resulting extract. Semi-synthetic derivatives of 4-NC with one or two substituent groups...

Antimicrobial and Larvicidal Activities of Stingless Bee Pollen from Maues, Ama...

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...

Chemical constituents of the stems of Spathelia excelsa (Rutaceae) and activity...

Phytochemical investigation from, the stems of Spathelia excelia (Rutaceae) collected in Amazonas yielded deacetylspathelin (1), 7,8-dimethoxyflindersine (2), new glabretal-type triterpenoid 3β-angeloyl-21,24-epoxy-7α, 21α,23α,25-tetrahydroxy-4α,4β,8β,10βteti, amethyl-25-dimethyI-14,18-cycIo-5α,13α,14α, 17α-cholestane (3), in addition to the known steroids β-sitosterol and stigmasterol. Their structures were es...

Evaluation of the in vivo and in vitro antimalarial activity of 4-nerolidylcate...

Biomass production in cultivated Pothomorphe peltata Miq. (Piperaceae) as a fun...

Chemical composition and larvicidal activity against Aedes aegypti larvae of es...

The essential oils of four Guarea species collected at Manaus (Amazonas, Brazil) were obtained by hydrodistillation and analyzed by GC-MS. Except for one diterpene detected, the compounds identified in the essential oils were hydrocarbons and oxygenated sesquiterpenes. The major sesquiterpenes were α-santalene (26.26%) and α- copaene (14.61%) from G. convergens branches; caryophyllene epoxide (40.91%) and humul...

In vitro citotoxicity of Pothomorphe peltata (L.) Miquel (Piperaceae), isolated...