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13 resultados
Anti-inflammatory effects of chemical components from Ginkgo biloba L. male flowers on lipopolysaccharide-stimulated RAW264.7 macrophages.
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Ginkgo biloba L., well known as living fossil, have various pharmacological activities. Eighteen compounds were isolated from Ginkgo male flowers including a novel matsutake alcohol glycoside, Ginkgoside A (1), and 17 known compounds-calaliukiuenoside (2), benzylalcohol O-α-l-arabinopyranosyl-(1 →
Immobilized α-amylase magnetic beads for ligand fishing: Proof of concept and identification of α-amylase inhibitors in Ginkgo biloba.
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Diabetes mellitus is a widespread metabolic disorder that affects millions of people around the world. The disease is a major burden on both economic and social levels, and there is a need for improved drugs with fewer side effects in the management of the disease. Current methods for isolation of
Antifungal activity of biflavones from Taxus baccata and Ginkgo biloba.
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Bilobetin and 4'''-O-methylamentoflavone were isolated and identified in the needles of Taxus baccata, for the first time in this species. The antifungal activity of biflavones from T. baccata and Ginkgo biloba, namely amentoflavone, 7-O-methylamentoflavone, bilobetin, ginkgetin, sciadopitysin and
Seasonal Variations of the Flavonoid Content from Ginkgo biloba Leaves.
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An HPLC method for the separation and the quantitative determination of flavonol glycosides, acylflavonol glycosides, and biflavones in crude leaf extracts from GINKGO BILOBA is described. The results, expressed in percentage of rutine, kaempferol P-coumaroyl glucorhamnoside, and bilobetin showed a
Inhibition of cGMP-phosphodiesterase-5 by biflavones of Ginkgo biloba.
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Ginkgo biloba dimeric flavonoids (GBDF) were shown to inhibit cAMP phosphodiesterase activity and to promote vasorelaxation. In particular, amentoflavone exhibited endothelium-dependent relaxation of rat aorta rings via enhanced generation and/or increased biological activity of nitric oxide,
[HPLC determination of six flavonoid constituents in Ginkgo biloba leaves].
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Six flavonoid constituents (quercetin, isorhamnetin, kaempferol, bilobetin, ginkgetin and sciadopitysin) were isolated from Ginkgo biloba leaves and determined by reversed phase HPLC using salvianolic acid B as internal standard. The column employed was Zorbax ODS (150 mm x 4 mm ID, 5 microns). The
UPLC-PDA-TOF/MS coupled with multivariate statistical analysis to rapidly analyze and evaluate Ginkgo biloba leaves from different origin.
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In the present study, an ultra performance liquid chromatography coupled with photodiode array detector and time-of-flight mass spectrometry (UPLC-PDA-TOF/MS) was proposed and validated for rapidly analyzing and evaluating Ginkgo biloba leaves from different origins by using multivariate statistical
Inhibition of cAMP-phosphodiesterase by biflavones of Ginkgo biloba in rat adipose tissue.
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This work compares the inhibition of cAMP-phosphodiesterase in rat adipose tissue by a mixture of Ginkgo biloba biflavones with the effect of individual dimeric flavonoids. The degree of enzyme inhibition by G. biloba biflavones was amentoflavone > bilobetin > sequoiaflavone > ginkgetin =
HPLC Separation and Quantitative Determination of Biflavones in Leaves from Ginkgo biloba.
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An HPLC method for separation and quantitative determination of biflavones in crude leaf extracts from GINKGO BILOBA L. is described. A system using a Lichrosorb(R)-Diol column and the ternary elution system: hexane-chloroform-tetrahydrofuran, was suitable for separation of sciadopitysin, ginkgetin,
Biflavones from Ginkgo biloba as inhibitors of human thrombin.
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Ginkgo Biloba leaf extract has been widely used for the prevention and treatment of thrombosis and cardiovascular disease in both eastern and western countries, but the bioactive constituents and the underlying mechanism of anti-thrombosis have not been fully characterized. The purpose of this study
Potential hepatic and renal toxicity induced by the biflavonoids from Ginkgo biloba.
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Evidence continues to grow on potential health risks associated with Ginkgo biloba and its constituents. While biflavonoid is a subclass of the flavonoid family in Ginkgo biloba with a plenty of pharmacological properties, the potential toxicological effects of biflavonoids remains largely unknown.
Biflavones from Ginkgo biloba as novel pancreatic lipase inhibitors: Inhibition potentials and mechanism.
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Reduction of lipid absorption has been recognized as an attractive approach for the discovery of new drugs to treat obesity and overweight. The leave extract of Ginkgo biloba has been widely used for the treatment of metabolic diseases (such as hyperlipidemia) in both eastern and western countries,
Anticancer Effects of Five Biflavonoids from Ginkgo Biloba L. Male Flowers In Vitro.
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Ginkgo biloba L., an ancient dioecious gymnosperm, is now cultivated worldwide for landscaping and medical purposes. A novel biflavonoid-amentoflavone 7''-O-β-D-glucopyranoside (1)-and four known biflavonoids were isolated and identified from the male flowers of Ginkgo. The
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