Results 101 to 110 of about 4,277 (206)

Double the Chemistry, Double the Fun: Structural Diversity and Biological Activity of Marine-Derived Diketopiperazine Dimers

open access: yesMarine Drugs, 2019
While several marine natural products bearing the 2,5-diketopiperazine ring have been reported to date, the unique chemistry of dimeric frameworks appears to remain neglected.
Nelson G. M. Gomes   +3 more
doaj   +1 more source

Farmacopea e terapia antiche : G. Carbonelli, in Archivio di Farmacognosia

open access: yes, 1914
Dorveaux Paul. Farmacopea e terapia antiche : G. Carbonelli, in Archivio di Farmacognosia. In: Bulletin de la Société d'histoire de la pharmacie, 2-3ᵉ année, n°8, 1914. pp.
Dorveaux, Paul
core  

Chemical Composition and Larvicidal Activity of Essential Oil from Venezuelan Andes

open access: yesNatural Product Communications, 2010
The chemical constituents of the essential oil obtained by hydrodistillation of the leaves of Eugenia triquetra O. Berg, collected in Táchira State, Venezuela, were identified by GC-MS analysis. Twenty-six components, which made up 88.5% of the oil, were
Flor D. Mora   +7 more
doaj   +1 more source

Análise fitoquímica das folhas de Tabebuia serratifolia (Vahl) Nicholson (Ipê Amarelo)

open access: yesEstação Científica, 2014
Este estudo teve como objetivo realizar a análise fitoquímica nas folhas de Tabebuia serratifolia (Vahl) Nicholson (Bignoniaceae) para avaliar a presença dos principais grupos de metabólitos secundários através do extrato bruto etanólico.
Líbio José Tapajós Mota   +2 more
doaj  

A Validated Reverse Phase HPLC Analytical Method for Quantitation of Glycoalkaloids in Solanum lycocarpum and Its Extracts

open access: yesJournal of Analytical Methods in Chemistry, 2012
Solanum lycocarpum (Solanaceae) is native to the Brazilian Cerrado. Fruits of this species contain the glycoalkaloids solasonine (SN) and solamargine (SM), which display antiparasitic and anticancer properties.
Renata Fabiane Jorge Tiossi   +6 more
doaj   +1 more source

Antioxidant effects of xanthones isolated from Leiothrix species (Eriocaulaceae)

open access: yes, 2003
Leiothrix (Eriocaulaceae) is an exclusively South American genus of which 37 species are restricted to Brazil. Leiothrix flavescens (Bong.) Ruhland and Leiothrix curvifolia (Bong.) Ruhland, are species endemic to areas of Minas Gerais and Bahia States ...
Piacente, S.   +4 more
core   +1 more source

Método de Isolamento e Identificação de Escopolamina em Datura suaveolens (Trombeteira-Branca)

open access: yesArquivos de Ciências da Saúde da UNIPAR, 2008
Desenvolveu-se um método de isolamento e identificação de escopolamina das folhas de Datura suaveolens, para ser utilizado em aulas práticas de farmacognosia e fitoterapia, utilizando-se a extração ácido-básica para obtenção dos alcalóides totais. Para o
Diógenes Aparício Garcia Cortez   +1 more
doaj  

Antimicrobial Activity of Fungal Endophytes Associated with Peperomia argyreia (Piperaceae)

open access: yesApplied Microbiology
The endophytic fungal biodiversity of unique plants like Peperomia argyreia (Miq.) É. Morren (Piperaceae) has antimicrobial properties and can be employed for infection treatment.
Melisa Isabel Barolo   +2 more
doaj   +1 more source

Indole monoterpene alkaloids from Chimarrhis turbinata DC Prodr.: a contribution to the chemotaxonomic studies of the Rubiaceae family

open access: yes, 2008
A utilização de parâmetros apenas morfológicos para posicionar taxonomicamente diversas espécies em sub-famílias e tribos na família Rubiaceae é bastante problemática devido à falta de informações sobre a distribuição geográfica e de características ...

core   +1 more source

Diversity and conservational status of vascular plants of "Sierra de las Quijadas" National Park (San Luis, Argentina)

open access: yesRevista de la Facultad de Ciencias Agrarias, 2020
The "Sierra de las Quijadas" National Park, located in the NW of San Luis province, covers 150,252 hectares and preserves a sample of the Chaco-Monte ecotone, with communities of the "Dry Chaco", and "Monte" ecoregions (partly "Monte of plains and ...
Elisa Margarita Petenatti   +5 more
doaj  

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