Flavone
Mostrando 13-24 de 90 artigos, teses e dissertações.
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13. Comparative study of the hypocholesterolemic, antidiabetic effects of four agro-waste Citrus peels cultivars and their HPLC standardization
ABSTRACT Citrus is an economically important fruit for Egypt, but its peel also is one of the major sources of agricultural waste. Due to its fermentation, this waste causes many economic and environmental problems. Therefore it is worthwhile to investigate ways to make use of this citrus waste generated by the juice industry. This study was aimed to explore
Rev. bras. farmacogn.. Publicado em: 2017-08
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14. Rapid identification and quantitative analysis of chemical constituents of Gentiana veitchiorum by UHPLC-PDA-QTOF-MS
ABSTRACT Gentiana veitchiorum Hemsl., Gentianaceae, a traditional Tibetan medicine, was used for the treatment of liver jaundice with damp-heat pathogen, as well as for headache and chronic pharyngitis. A rapid ultra-performance liquid chromatography, photodiode array detector, quadrupole time-of-flight mass spectrometry method was developed for the fast and
Rev. bras. farmacogn.. Publicado em: 2017-04
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15. In vivo diabetic wound healing effect and HPLC–DAD–ESI–MS/MS profiling of the methanol extracts of eight Aloe species
Abstract Genus Aloe, Xanthorrhoeaceae, is well distributed all over Egypt, and many species have been used as medicinal plants; mainly reported to prevent cardiovascular diseases, cancer and diabetes. This study attempts to analyze the secondary metabolites in the methanol extract of the leaves of eight Aloe species; A. vera (L.) Burm. f., A. arborescens Mil
Rev. bras. farmacogn.. Publicado em: 2016-06
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16. Cytotoxic activity of phenolic constituents from Echinochloa crus-galli against four human cancer cell lines
Abstract Echinochloa crus-galli (L.) P. Beauv., Poaceae, grains are used as a feed for birds and millet for humans. The sulforhodamine B assay was used to assess its cytotoxicity against four human cancer cell lines. The ethanolic extract (70%) proved to be most active against HCT-116 and HELA cell lines (IC50 = 11.2 ± 0.11 and 12.0 ± 0.11 µg/ml, respecti
Rev. bras. farmacogn.. Publicado em: 2016-02
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17. Screening of flavonoids rich fractions of three Indian medicinal plants used for the management of liver diseases
ABSTRACTThe decoctions of the Butea monosperma (Lam.) Taub., Fabaceae, Bauhinia variegata L., Fabaceae, and Ocimum gratissimum L., Lamiaceae, are traditionally used for the treatment of various types of hepatic disorder. Phytochemical studies have shown that total flavonoids from these plants were the major constituents of the picked out part of each plant.
Rev. bras. farmacogn.. Publicado em: 2015-10
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18. Evaluation of fractions and 5,7-dihydroxy-4',6-dimethoxy-flavone fromClerodendrum phlomidis Linn. F. against Helicoverpa armigera Hub.
Twelve fractions from chloroform extract of Clerodendrum phlomidis and 5,7-dihydroxy- 4',6-dimethoxy-flavone (pectolinaringenin) were evaluated against Helicoverpa armigera. Maximum antifeedant (89.41%), larvicidal (83.77%) and ovicidal (69.25%) activities were observed in fraction 5. The least LC50 value for antifeedant (178.09 ppm) and larvicidal (198.23 p
Braz. arch. biol. technol.. Publicado em: 14/10/2014
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19. Actividad insecticida sobre Spodoptera frugiperda (Lepidóptera: Noctuidae) de los compuestos aislados de la parte aérea de Piper septuplinervium (Miq.) c. dc. y las inflorescencias de Piper subtomentosum Trel. & Yunck. (Piperaceae)
The bioassay-guided purification of ethanolic extracts from inflorescences of Piper subtomentosum Trel. & Yunck and aerial part of Piper septuplinervium (Miq. ) C. DC. led to isolation of five flavonoids, uvangoletin (1), galangin (2), chrysin (5), 5-hydroxy-4',7-dimethoxy-flavone (6), pinostrobin (7); one amide, N-p-coumaroil-tyramine (4); one acylglycerol,
Quím. Nova. Publicado em: 2014-06
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20. Color, phenolic and flavonoid content, and antioxidant activity of honey from Roraima, Brazil
The total phenolic and flavonoid content, color, and antioxidant activity were evaluated from ten honey samples from Apis mellifera L. collected from Roraima State, Brazil. The total phenolic content was determined using the Folin-Ciocalteu reagent and ranged from 250 to 548 mg gallic acid kg-1 of honey. The total flavonoid content was obtained using two met
Food Sci. Technol. Publicado em: 25/03/2014
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21. Flavonoides de Lonchocarpus araripensis (Leguminoseae) - isolamento, atribuição inequívoca dos sinais de RMN ¹H e 13C e análise conformacional
In a continuing investigation for potentially bioactive natural products, flavonoids were isolated from Lonchocarpus araripensis (Leguminoseae) and identified as 3-methoxy-6-O-prenyl-6'',6''-dimethylchromene-[7,8,2'',3'']-flavone (1), 3,6-dimethoxy-6'',6''-dimethylchromene-[7,8,2'',3'']-flavone (2) and 3,5,8-trimethoxy-[6,7,2",3"]-furanoflavone (3). This is
Quím. Nova. Publicado em: 2014
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22. Bivalent RNA interference to increase isoflavone biosynthesis in soybean (Glycine max)
In this work, a bivalent RNA interference (RNAi) plant-transformation vector was constructed to silence both the flavanone 3-hydroxylase (F3H) gene and the flavone synthase II (GmFNSII) gene in soybean (Glycine max). Two further unit RNAi vectors were constructed for each of these two genes. RNAi-mediated suppression of these genes effectively regulated flav
Braz. arch. biol. technol.. Publicado em: 26/11/2013
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23. Prenylated flavone from roots of a hybrid between Artocarpus heterophyllus and Artocarpus integer and its biological activities
Uma nova flavona prenilada, 2,8-dihodroxi-3,10-dimetoxi-6-(2-metil-1-propeno-1-il)-6H,7H-[1]benzopirano[4,3-b][1]-benzopirano-7-ona, juntamente com 24 compostos conhecidos foram isolados do extrato bruto em acetona das raízes de um híbrido entre Artocarpus heterophyllus e Artocarpus integer. Suas estruturas foram determinadas pelos dados de espectroscopia
J. Braz. Chem. Soc.. Publicado em: 2013-10
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24. Prediction of microdialysis relative recovery of flavone derivatives based on molecular descriptors
Recuperação relativa (Re) é uma das principais preocupações de microdiálise, uma técnica de amostragem acessível que pode coletar continuamente drogas livres no sangue e na maioria dos tecidos. Para uma determinada sonda de microdiálise, a recuperação de cada composto desta sonda está relacionada às características estruturais e propriedades f�
J. Braz. Chem. Soc.. Publicado em: 11/12/2012