Buckwheat is a multipurpose crop used for both grains and greens and known to have several medicinal and nutritional properties. Buckwheat contains flavonoids such as rutin, anthocyanins, catechins, chlorogenic acid, 4-hydroxy-3-methoxy benzoic acid, caffeic acid, epicatechins, p-courmaric acid, ferulic acid etc. Fagopyrum esculentum and Fagopyrum tataricum are the major source of flavonoid cal...

dorema glabrum fisch. & c.a. mey. (apiaceae) is a monocarpic perennial plant distributed in southern caucasus. in azerbaijan republic folk medicine, the gum-resin of this species is used as a diuretic and anti-diarrheal agent. it is also traditionally used for the treatment of bronchitis and catarrh. in the present study, chemical constituents of the essential oil and extract of d. glabrum aeri...

background and aims: inflammation is one of the defense mechanisms of body and unpleasant sensation of pain is caused by tissue damage. mostly, inflammation occurs through the release of inflammatory mediators. salvia officinalis is one of the most valuable medicinal kind of mint order. salvigenin is one of the active flavonoids existing in this plant. the aim of this study was to evaluate the ...

objectives this study was designed to determine the chemical composition, in vitro antioxidant activity, and total phenol content of various extracts of s. chloroleuca. materials and methods dried aerial parts of the plant were crushed, then sequentially extracted with n-hexane, ethyl acetate, and methanol. the fractions of s. chloroleuca were subjected to silica gel column chromatography and s...

tribulus terrestris l. var. orientalis (kerner) g. beck is widely used in the traditional medicine of many countries. several flavonoides are identified from the plant material. aerial parts which collected from northeast of iran are used in this study. three flavonoid glycosides were isolated and characterized. the flovonoids were found to be based on quercetin and kaempferol. flavonoid glycos...

Flavonoids are secondary metabolites that play important roles in plant physiology. Despite numerous studies examined the effects of available carbon (C) or nitrogen (N) on flavonoid biosynthesis, the mechanism of C/N interactive effects on flavonoid metabolism is still unclear. In this study, we analyzed the composition of flavonoids and the expression levels of flavonoid-related genes in leav...

The antibacterial and anti-inflammatory activities, and protective effects of extracts (flavonoid glycosides) of Polygonum capitatum were investigated to detect the evidence for the utilization of the herb in the clinical therapy of gastritis caused by H. pylori. A mouse gastritis model was established using H. pylori. According to treating methods, model mice were random assigned into a model ...

A simple tandem mass spectrometry method for differentiating isomeric monoglycosyl flavonols, flavones, and flavanones using manganese complexation is reported. Dissociation of the [Mn(II) (L) (L - H)]+ and [Mn(II) (L)2 (L - H)]+ species provides unique fragment ions that allow the identification of the saccharide moiety as glucose, galactose, arabinose, or xylose. The glycosylation site of the...

The elucidation of flavonoid isomers is accomplished by electrospray ionization tandem mass spectrometry (ESI-MS/MS) via formation and collisional activated dissociation (CAD) of metal/flavonoid complexes containing an auxiliary ligand. Addition of a metal salt and a suitable neutral auxiliary ligand to flavonoids in solution results in the formation of [M(II) (flavonoid-H) ligand]+ complexes b...

This study investigated the phenolic, flavonoid, and vitamin constituents in the main root, root hair, and leaf of ginseng. The total individual phenolic and flavonoid contents were the highest in the leaf, followed by the main root and root hair. Ferulic acid and m-coumaric acid were found to be the major phenolics in the main root and root hair, while p-coumaric acid and m-coumaric acid were ...