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Showing 1 to 20 of 37 for “"Flavonols"”.
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Investigation of the fate of dietary flavonols in humans and rats using HPLC-MS2 techniques
There is a growing evidence of the potential health benefits of a diet rich in fruits and vegetables. National nutritional guidelines advise the consumption of at least five portions (400 g ) of these foods per day with the goal being a reduction in the levels of coronary heart disease (CHD) …
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Exploring hetero-atom derivatization in maltols and flavonols : the effect on reactivity of flavonol dioxygenation.
Flavonols are a class of polyphenolic natural products containing a 3-hydroxy pyrone core. They have been found to have several desirable properties such as anti-fungal, anti-bacterial, anti-mutagenic and anti-carcinogenic properties and they act as UV filters in plants. Flavonols display dual …
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Examination of 2-Oxoglutarate Dependant Dioxygenases Leading to the Production of Flavonols in <i>Arabidopsis thaliana</i>
The flavonols are a varied and abundant sub-class of flavonoids that are associated with a number of essential physiological functions in plants and pharmacological activities in animals. The 2-oxoglutarate-dependant dioxygenases(2-ODDs), flavonol synthase (FLS) and flavanone 3-hydroxylase (F3H), …
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Metabolomic approaches to understanding the auxin and ethylene response in Arabidopsis roots
… classes of specialized metabolites such as flavonols and glucosinolates change in abundance in response to both auxin and ethylene, there was little overlap with regard to the specific metabolites affected. These data will be integrated with information from transcriptomic and proteomic …
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Detection of Biologically Relevant Anions by Fluorescence and NIR Molecular Probes
… to ethidium under the pro-oxidative effect of flavonols under physiological conditions and is a sensitive fluorescent probe for rapid quantification of the superoxide radical-forming pro-oxidant activity of flavonols. This assay was then successfully applied in quantifying the pro-oxidant …
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Flavonoid Consumption of College Athletes
… was the most abundant subclass, followed by flavonols, flavanones, anthocyanidins, and flavones. These rankings are consistent with findings from similar studies. The main food group sources of flavonoids were fruits, beverages, and vegetables. Top five food sources for total flavonoids were …
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Functionality of Azadirachta indica A. Juss (neem) in beverages
… we used LC-ESI-MS/MS to identify specific flavonols- myricetin, quercetin and kaempferol in neem leaves, which were present in greater quantities in neem than in these teas. These flavonols have been known to impart neem its anti-diabetic property and therefore, its identification and …
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Side chain decoration of Anthocyanins; Mechanisms and Effects On functionality
… cause formation of AVIs. Neither the presence of flavonols nor light or high amounts of anthocyanins can lead to the formation of AVIs. Therefore, the type of decoration mainly aromatic acylation of anthocyanins is responsible for AVI formation. From understanding the molecular mechanisms of …
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Indirect Effects of Elevated Carbon Dioxide on Members of Three Herbivorous Feeding Guilds on Soybean, Glycine Max
… grown under elevated CO2. Increased amounts of flavonols and decreased amounts of isoflavonoids in leaves grown under elevated CO2 may contribute to increased herbivore longevity and fecundity. A. glycines population growth is greater on soybeans grown under elevated levels of CO2, which may be …
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Relationship Between Flavonoid Structure And Phase-II Metabolism
… of efflux transporters in the disposition of flavonols in Caco-2 cells; and 6) study the regiospecific disposition of flavones in Caco-2 cells. Method: For objectives 1 and 2, in vitro recombinant human UGT isoforms glucuronidation model was used. For objective 3, in silico pharmacophore and …
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Flavonoid diversification in Hibiscus and its impact on petal pattern evolution
… by flavonoid pigments including anthocyanins and flavonols. Their flowers display a contrast between a purple base and an off-white distal region. H. trionum belongs to the Trionum Complex native to Australia and New Zealand, whose members vary in bullseye size and colour. This thesis investigates …
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THE BIOSYNTHSIS OF QUERCETIN IN BUCKWHEAT
… of quercetin, one of the most widely distributed flavonols in nature, was undertaken. The glycoside rutin, which on hydrolysis yields quercetin, is obtained in relatively large quantities from buckwheat leaves.
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Aplicación foliar en el viñedo de un extracto del alga Ascophyllum nodosum como herramienta para mejorar la composición nitrogenada, fenólica y aromática de la uva y del vino de las variedades Tempranillo y Tempranillo Blanco
… variety, the concentration of catechin and flavonols in grapes increased after the application of the high dosage of the seaweed to the grapevines in both seasons. This treatment increased also the concentration of several amino acids in the musts in 2017, while the application of both …
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STUDIES ON THE EFFECTS OF SOME FLAVONOIDS ON DNA TRANSCRIPTION AND CLONING OF LIPOAMIDE DEHYDROGENASE GENE
… was concluded that flavonoids particularly the flavonols inhibited transcription by SP6 RNA polymerase at the chain elongation step. The exact mechanism however remains to be elucidated. The interesting results obtained from the in-vitro run-off transcription experiments provided the impetus to …
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Flavonoid Intake and Prostate Cancer Aggressiveness In African Americans and European Americans
… risks with increasing intakes were found for flavonols and flavanols, although these odds ratios did not reach statistical significance. Associations between flavonoids and aggressiveness were modified by smoking status and age, such that inverse associations were strongest in men younger than …
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HORMONE AND FLAVONOL REGULATION OF MAMMALIAN METABOLIC SIGNALING PATHWAYS
The incidence of obesity is increasing around the world. Obesity is often associated with debilitating diseases including Type 2 Diabetes Mellitus (T2DM). Both obesity and T2DM are linked to altered peptide hormone signaling, including insensitivity to insulin and leptin. Research in this …
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Antioxidant activity, protective effects and absorption of polyphenolic compounds
… gallic acid contributed between 24-44%. The flavonols and anthocyanins were minor antioxidant components in red wines. By combining HPLC, MS2 and on-line assessment of antioxidant activity, the major phenolic compounds present in red wine were identified, together with their direct …
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Assessment of endosomes as sites of signal transduction in plants during bacterial attack
… potential role for LE/MVB mediated secretion of flavonols in pathogen defence. Moreover, MPK cascade components were found in endosomal proteomes both before and after flagellin perception. Upon treatment, the flagellin responsive MPKs (MPK3, 4 and 6) were activated at endosomes and putative …
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Breeding for Bioactive Compounds in Vigna Unguiculata L. (WALP.)
… showed the highest content of flavan-3-ols, flavonols and phenolic acids among all color groups, with values of 169 ?g CE/g, 26.17 ?g QHE/g, 27.14 ?g GAE/g for red and 281 ?g CE/g, 23 ?g QHE/g and 25 GAE/g for black phenotypes. When studying the impact of drought stress, genotypeXtreatment …
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Evaluation of the antioxidant activity of extracts and flavonol glycosides isolated from the seed coats of coloured beans (Phaseolus vulgaris L.)
The seed coat of the common bean (Phaseolus vulgaris L.) can be considered an important source of flavonoids. Flavonoids are well known for their beneficial effects on health long before they were isolated as effective compounds. Dry beans are typically processed and the seed coats may be removed …
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