نتایج جستجو برای: such a flavonoid type as quercetin 3
تعداد نتایج: 14574736 فیلتر نتایج به سال:
Citrullus colocynthis (Linn.) Schrad. is an important medicinal plant belonging to family Cucurbitaceae. Flavonoid "quercetin" was isolated from in vivo (leaf, stem, fruit and root) and in vitro callus of the species. The dried samples were separately soxhlet extracted in 80% methanol and then reextracted with petroleum ether, diethyl ether and ethyl acetate. The fraction was concentrated and s...
abstract:assume that y is a banach space such that r(y ) ? 2, where r(.) is garc?a-falset’s coefficient. and x is a banach space which can be continuously embedded in y . we prove that x can be renormed to satisfy the weak fixed point property (w-fpp). on the other hand, assume that k is a scattered compact topological space such that k(!) = ? ; and c(k) is the space of all real continuous ...
three major flavonoid fractions were separated from a methanol extract of calendula officinalis flowers by preparative tlc. these fractions were evaluated for the inhibition of parent and tamoxifen resistant t47d human breast cancer cells. we also examined the effect of quercetin and isorhamnetin on the growth of parent and resistant t47d cells in the presence and absence of tamoxifen. it was f...
The flowers, roots and stems of Cirsium species are used as a folk remedy in Anatolia. In order to evaluate antioxidant activity of Cirsium hypoleucum which is an endemic plant, superoxide radical (hypoxanthine-xanthine oxidase system) and free radical scavenging activities (DPPH) using in vitro electron spin resonance (ESR) spectrometry of the different extracts, fractions and compounds obtain...
Stable free radical scavenging and antiperoxidative activities of resveratrol, a component of grapes and red wine, were evaluated and compared with some other known bioflavonoids (quercetin, catechin, kaempferol, myricetin, fisetin, ellagic acid and naringenin) widely present in the plant kingdom. Free radical scavenging activity was measured in an in vitro chemical system (DPPH assay), while f...
Background and Purpose: Varthemia persica is an aromatic plant belonging to the Astraceae family. The plant is endemic to Iran. It contains volatile oils and the main constituents of volatile oils are sesquiterepens. There is no information regarding flavonoid constituents. Materials and Methods: Extract was prepared from freeze-dried power of flower, fruit and aerial parts with methanol-w...
Selective UV-spectrophotometric methods for determination of iron(III) in iron(II) samples have been developed. The methods are based on the interaction of Fe(III) with quercetin and morin, compounds of the flavonoid group. Redox reactions occurring between Fe(III) ions and the reagents used make the basis for the detection. Iron(II) does not react with quercetin and morin under the conditions ...
OBJECTIVE In order to investigate the pharmacological properties of Ginkgo biloba extract (GBE) on improving blood circulation, the regulating action of GBE and quercetin (a main flavonoid ingredient in GBE) on thrombomodulin (TM) expression and tissue-type plasminogen activator (t-PA) secretion was studied. METHODS Using flow cytometer and gel image system respectively, we evaluated the TM e...
in this article, we have focused one some basic and productive information about the properties of spectrum and singular values related to compact operators which are ideals in a c*-algebra of bounded operators. considering a two-sided connection between the family of symmetric gauge functions on sequence of singular values of compact operators and symmetric norms on finite dimensional ope...
Quercetin is a dietary flavonoid with known antitumor effects against several types of cancers by promoting apoptotic cell death and inducing cell cycle arrest. However, U373MG malignant glioma cells expressing mutant p53 are resistant to a 24 h quercetin treatment. In this study, the anticancer effect of quercetin was reevaluated in U373MG cells, and quercetin was found to be significantly eff...
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