Consulta: creatorFacets:"Young,Maria Cláudia Marx"
Registros recuperados: 3
Data/hora: 05/06/2024 17:06:04

Chemical composition, acetylcholinesterase inhibitory and antifungal activities of Pera glabrata (Schott) Baill. (Euphorbiaceae)
Provedor de dados: 88
Autores: Cardoso-Lopes,Elaine Monteiro; Paula,Daisy Maria Bentes de; Barbo,Fausto Erritto; Souza,Amanda de; Blatt,Cecília Terumi Teradaira; Torres,Luce Maria Brandão; Young,Maria Cláudia Marx.
Pera glabrata (Schott) Baill. was selected for this study after showing a preliminary positive result in a screening of Atlantic Forest plant species in the search for acetylcholinesterase inhibitors and antifungal compounds. The bioassays were conducted with crude ethanol extract of the leaves using direct bioautography method for acetylcholinesterase and antifungal activities. This extract was partitioned with hexane, chloroform and ethyl acetate solvents. The active chloroform fraction was submitted to silica gel chromatography column affording 12 groups. Caffeine, an alkaloid, which showed detection limits of 0.1 and 1.0 µg for anticholinesterasic and antifungal activities, respectively, was isolated from group nine. After microplate analyses, only...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 9-hydroxy-4-megastigmen-3-one; Biological activities; Caffeine; Euphorbiaceae.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400019

Essential oil composition of fruit colour varieties of Eugenia brasiliensis Lam.
Provedor de dados: 63
Autores: Moreno,Paulo Roberto H.; Lima,Marcos Enoque Leite; Sobral,Marcos; Young,Maria Cláudia Marx; Cordeiro,Inês; Apel,Miriam Anders; Limberger,Renata Pereira; Henriques,Amélia Teresinha.
Eugenia brasiliensis Lam. is a variable species concerning fruit colour, with three recognized varieties. However, the definition of varieties is not easy for Myrtaceae species and not widely accepted. Two fruit colour varieties (purple and yellow) of E. brasiliensis had their essential oil composition analysed in order to give support to the existence of varieties for this species. Although, the major components in the leaf oil are the same monoterpenes for both varieties, alpha-pinene, beta-pinene and 1,8-cineol, the purple fruit variety accumulates more oxygenated sesquiterpenes (33.9%) than the one with yellow fruits (3.8%). The major differences occurred in purple fruits that present as major components caryophyllene oxide (22.2%) and alpha-cadinol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrtaceae; Chemotypes; Terpenes; Pinenes; Caryophyllene oxide.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400014

Antifungal activity of Piper diospyrifolium Kunth (Piperaceae) essential oil
Provedor de dados: 58
Autores: Vieira,Silvia Cristina Heredia; Paulo,Luis Fernando de; Svidzinski,Terezinha Inez Estivaleti; Dias Filho,Benedito Prado; Nakamura,Celso Vataru; Souza,Amanda de; Young,Maria Cláudia Marx; Cortez,Diógenes Aparício Garcia.
In vitro activity of the essential oil from Piper diospyrifolium leaves was tested using disk diffusion techniques. The antifungal assay showed significant potencial antifungal activity: the oil was effective against several clinical fungal strains. The majority compounds in the essential oil were identified as sesquiterpenoids by GC-MS and GC-FID techniques.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piper diospyrifolium; Essential oil; Antifungal activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300020