Biflavonoids
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. What is new in non-chromatographic flavonoid purification?
Flavonoids are metabolites occurring in all plant tissues and present different biological activities. They occur in a mixture of similar polarity with laborious separation and purification processes, usually furnishing low yields. Semi-preparative chromatographic methods are universally employed procedures for their isolation. This paper discusses the state
Química Nova. Publicado em: 2022
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2. Bioactive Bioflavonoids from Platonia insignis (Bacuri) Residues as Added Value Compounds
Platonia insignis fruit, popularly known as bacuri, is traditionally used in folk medicine for its anti-inflammatory and antioxidant properties. Therefore, this study determined the chemical composition and biological activities of the bacuri’s shell and seeds extracts, considered residues from its consumption and industrial uses. Four biflavonoids (GB-2a,
J. Braz. Chem. Soc.. Publicado em: 2021-04
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3. COMPOSIÇÃO QUÍMICA, ATIVIDADE ANTIRADICALAR E ANTIMICROBIANA DO PÓLEN APÍCOLA DE FABACEAE
The aim of this investigation was to analyze two samples of pollen collected by Apis mellifera bees in view of their chemical composition, antiradicalar and antimicrobial activities. Palynological analysis showed that the predominant pollen was Fabaceae species (42.3%, sample I and 50.6%, sample II). The characterization by ultra-performance liquid chromatog
Quím. Nova. Publicado em: 2019-01
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4. In vivo antileishmanial activity and chemical profile of polar extract from Selaginella sellowii
The polar hydroethanolic extract from Selaginella sellowii(SSPHE) has been previously proven active on intracellular amastigotes (in vitro test) and now was tested on hamsters infected with Leishmania (Leishmania) amazonensis (in vivo test). SSPHE suppressed a 100% of the parasite load in the infection site and draining lymph nodes at an intralesional dose o
Mem. Inst. Oswaldo Cruz. Publicado em: 19/02/2016
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5. A New Biflavonoid from
Schinopsis brasiliensis (Anacardiaceae)Phytochemical investigation of the MeOH extract of Schinopsis brasiliensis Engl. stems led to the isolation of the new biflavanone (2R*,3R*,2''R*,3''R*)-7-hydroxy-4'-methoxy-flavanone- (3→3'')-3''',7''-dihydroxy-4'''-methoxy-flavanone and 4,2',4'-trihydroxychalcone-(3→O→4'')- 2''',4'''-dihydroxychalcone, whereas methyl gallate, gallic acid, (6R,9R)-
J. Braz. Chem. Soc.. Publicado em: 2015-07
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6. In vitro activity of the hydroethanolic extract and biflavonoids isolated from Selaginella sellowii on Leishmania (Leishmania) amazonensis
This study is the first phytochemical investigation of Selaginella sellowii and demonstrates the antileishmanial activity of the hydroethanolic extract from this plant (SSHE), as well as of the biflavonoids amentoflavone and robustaflavone, isolated from this species. The effects of these substances were evaluated on intracellular amastigotes of Leishmania (
Mem. Inst. Oswaldo Cruz. Publicado em: 2014-12
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7. Amburanins A and B from Amburana cearensis: daphnodorin-type biflavonoids that modulate human neutrophil degranulation
Dois novos biflavonoides 3,5,7,4'-tetraidroxiflavanona-(2→O→4':3→3')-2',4',6',4-tetraidroxidiidrochalcona (1) e 3,5,7,4'-tetraidroxiflavanona-(2→O→7:3→8)-3,4',5,7-tetraidroxiflavona (2), denominados amburanina A e amburanina B, respectivamente, foram isolados da casca do caule de Amburana cearensis, e as estruturas deles foram elucidadas com base
J. Braz. Chem. Soc.. Publicado em: 2014-04
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8. Ouratea genus: chemical and pharmacological aspects
Ouratea and the other genera of the Ochnaceae family are a rich source of flavonoids and biflavonoids. These can be used as chemotaxonomic markers of Ouratea. Some biflavonoids, as well as extracts of the Ouratea species show important biological activities, such as antitumour, antiviral, vasodilation, antimicrobial and DNA topoisomerase inhibition. On the
Rev. bras. farmacogn.. Publicado em: 2014-01
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9. Ocorrência de biflavonoides em Clusiaceae: aspectos químicos e farmacológicos
This work describes the biflavonoids found in species of Clusiaceae, particularly the genera Garcinia and Calophyllum, emphasizing the importance of these metabolites as chemical markers of this family, their contribution to the pharmacological potential of these species, besides the promising potential of these compounds in the search for new drugs.
Quím. Nova. Publicado em: 2012
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10. Contribuição ao estudo químico e avaliação da atividade antioxidante dos frutos verdes de Clusia paralicola (Clusiaceae)
Clusia paralicola (Clusiaceae) occurrs in forests from northeastern Brazil, especially in the semi-arid and wet forests, is popularly known as pororoca. This work describes the chemical and antioxidant activity of the green fruits from Clusia paralicola G. Mariz Cunha and resulted in the isolation and identification of two biflavonoids (GB1-7"-Oglucoside and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 201107
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11. Analysis of secondary metabolites produced by endophytic fungi associated to Cupressus lusitanica / Análise de metabólitos secundários produzidos por fungos endofíticos associados à Cupressus lusitanica
Some phytopatogenic fungi found in Cupressus species produces phytotoxins very aggressive to the host plant. Surprisingly, these toxins are diterpenoids structures, as well as some endogenus metabolites in Cupressus species. This fungi ability appears to be a specialized strategy in the association fungi-plant. These observations motivated the development of
Publicado em: 2009
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12. Trypanocidal constituents in plants: 7. Mammea-type coumarins
Calophyllum brasiliense and Mammea americana (Clusiaceae) are two trees from the tropical rain forests of the American continent. A previous screening showed high trypanocidal activity in the extracts of these species. Several mammea-type coumarins, triterpenoids and biflavonoids were isolated from the leaves of C. brasiliense. Mammea A/AA was obtained from
Memórias do Instituto Oswaldo Cruz. Publicado em: 2008-08