This work focused on the optimization of ultrasound (US) extraction polyphenols from sweet cherry pulp by monitoring cyanidin-3O-rutinoside, quercetin-3O-rutinoside, and trans-3-O-coumaroylquinic acid, representing main anthocyanin, flavonol, hydroxycinnamate, respectively, identified in extracts through chromatographic analyses (HPLC-DAD), as output variables. The was performed following a two...

The antimicrobial activity against fish bacterial pathogens of flavonoids (morin, morin-3-O-lyxoside, morin-3-O-arabinoside, quercetin, and quercetin-3-O-arabinoside) isolated from the leaves of Psidium guajava was evaluated. The flavonoids were shown to have bacteriostatic effect on all of the tested bacteria.

Bioguided fractionation of a leaves extract from Limoniastrum feei (Girard) Batt. (Plumbaginaceae) led to the isolation of seven polyphenolic constituents: gallic acid (1), myrciaphenone A (2), myricetin-3-O-beta-galactopyranoside (3-1), epigallocatechin gallate (3-2), myricetin 3-O-alpha-rhamnopyranoside (4), quercetin (5) and myricetin (6). Gallic acid was the most antioxidant compound in DPP...

A tannin, EA (1), and other nine non-tannins compounds, gallic acid (2), quercetin (3), myricetin (4), 3-O-methylellagic acid-4?-O-?-L-rhamnopyranoside (5), quercetin-3-O-?-D-galactopyranoside (6), kaempferol-3-O-?-D-glucoside (7), quercetin-3-O-?-D-glucuronide (8), quercetin-3-O-rutinoside (9), 3,3?,4-tri-O-methylellagic acid-4?-O-?-D-glucopyranosyl (10) were isolated from a valuable medicinal...

It is a perennial shrub with stout, soft wooded, glabrous stems. Its leaves and roots are reportedly of medicinal value. The leaves are useful for the treatment of diabetes and the ointment prepared from roasted leaves relieves vertigo (1, 2). Its root is used as a sudorific, antidiarrhoeal, antidysenteric, antispasmodic and to treat cardiac and skin diseases (1). The whole plant is used tradit...

Bromelia balansae (Family Bromeliaceae) is a medicinal plant commonly used in the central region of Brazil as a cough syrup and also eaten roasted. The methanolic extract of ripe fruits was analyzed by chromatographic methods and spectrometrically. Four glycoside flavonols were isolated: kaempferol-3-O-α-L-rhamnopyranoside (1), kaempferol-3-O-α-L-rhamnopyranosyl-(1-->6)-ß-D-glucopyranoside (2),...

Geranium nepalense Sweet is a common Chinese herbal medicine and has been used as influenza, dysentery, antiphlogistic and analgesic tonic, hemostatic, stomachic, and antidiabetic drugs. The anti-inflammatory effects of G. nepalense on tetradecanoyl phorbol acetate (TPA)-induced mouse ear edema were studied in this work. The results showed that ethyl acetate fraction of the water extract of G. ...

We studied the existence and uniqueness of solutions of the following two kinds of nonlinear matrix equations X = Pk−1 l=0 P T l X lPl, and X = Pk−1 l=0 (P T l XPl) αl , and the convergence of the matrix sequences {Xi} recursively defined by Xn+k = Pk−1 l=0 P T l X αl n+lPl, n ≥ 0, and Xn+k = Pk−1 l=0 (P T l Xn+lPl) αl , n ≥ 0, where |αl| ≤ 1 for 0 ≤ l ≤ k − 1 and X0, · · · , Xk−1 are initial p...

Benzyl α-l-rhamnopyranoside 4, obtained by both conventional and microwave assisted glycosidation techniques, was subjected to 2,3-O-isopropylidene protection to yield compound 5 which on benzoylation and subsequent deprotection of isopropylidene group gave the desired 4-O-benzoylrhamnopyranoside 7 in reasonable yield. Di-O-acetyl derivative of benzoate 7 was prepared to get newer rhamnopyranos...

A new compound, kaempferol 3-O-(2''-O-galloylrutinoside) (1), was isolated from the white flower of Nymphaea candida, together with nine known flavonol glycosides, kaempferol (2), kaempferol 3-O-beta-D-glucopyranoside (3), kaempferol 3-O-alpha-l-rhamnopyranoside (4), kaempferol 3-O-alpha-l-rhamnopyranosylglucopyranoside (5), kaempferol 7-O-beta-D-glucopyranoside 3-(O-alpha-l-rhamnopyranosylgluc...