Chromatographic separation of the MeOH extract from the aerial parts of Saussurea pulchella led to the isolation of seven terpenes (1-4, 11-13), and eight phenolics (5-10, 14-15). Their structures were determined by spectroscopic means to be (3S)-3-O-(3',4'-diangeloyl-beta-D-glucopyranosyloxy)-3,7-trimethylocta-1,6-diene (1), 7delta-methoxy- 4(14)- oppositen-1beta-ol (2) 4(15)- eudesmene-1beta,...

The gIucosylation of trans-o-hydroxycinnamic acid has been demonstrated in cell-free extracts of MeliIotus alba. The reaction requires UDPG, a sulfhydryl compound, and an active extract from sweet clover leaves. The product of the reaction has been tentatively identified as trans-/3-D-glucosyl-o-hydroxycinnamic acid. I N T R O D U C T I O N Low molecular weight phenols which occur in living cel...

The stability of anthocyanins from grape skins after applying different extraction techniques has been determined. The following compounds, previously extracted from real samples, were assessed: delphinidin 3-glucoside, cyanidin 3-glucoside, petunidin 3-glucoside, peonidin 3-glucoside, malvidin 3-glucoside, peonidin 3-acetylglucoside, malvidin 3-acetylglucoside, malvidin 3-caffeoylglucoside, pe...

Phytochemical investigation of the ethanolic extract of defatted fruits of Malva sylvestris Linn. (Malvaceae) led to the isolation of six new steroidal lactones and a homomonoterpenic glucoside along with beta-sitosterol-3-beta-D-glucopyranoside. The structures of new phytoconstituents have been elucidated as cholest-5-en-3a-ol-18(21)-olide (sylvestrosterol A), cholest-9(11)-en-3alpha-ol-18(21)...

Cellulose has been directly converted into environmentally friendly alkyl glycoside surfactants in a one pot transformation. By working in ionic liquid media with Amberlyst 15Dry (A15) as catalyst and coupling the rate of cellulose hydrolysis and the rate of glycosidation of the monosaccharides formed with C(4) to C(8) alcohols, it was possible to obtain 82% mass yield of octyl-alpha,beta-gluco...

A new aristolactam, aristolactam 9-O-β-D-glucopyranosyl-(1→2)-β-D-glucoside, and two alkamides, N-cis- and N-trans-p-coumaroyl-3-O-methyldopamine, were isolated from stems of Aristolochia gigantea, together with the known compounds allantoin, E-nerolidol, β-sitosterol, (+)-kobusin, (+)-eudesmin, trans-N-feruloyltyramine, trans-N-coumaroyltyramine, trans-N-feruloyl-3-O-methyldopamine, aristolact...

Anthocynanins, found in fruits and vegetables, have a variety of protective properties, which have generally been attributed to their antioxidant capacity. However, antioxidants are generally strong reductants, and some reductants have been found to block apoptosis by reducing cytosolic cytochrome c, which prevents caspase activation. We tested the ability of various anthocyanins: to reduce cyt...

The glycosylation of αand δ-tocopherols using Klebsiella pneumoniae and cyclodextrin glucanotransferase (CGTase) was investigated. K. pneumoniae converted αand δ-tocopherols into the corresponding β-glucosides in 10 and 8% yield, respectively. CGTase glycosylated α-tocopheryl β-glucoside to α-tocopheryl β-maltoside (51%) and αtocopheryl β-maltotrioside (35%). On the other hand, δ-tocopheryl β-g...

Besides caffeic acid three pyrones have been isolated from aquous bark extracts from Acosmium panamense and their structures were determined using spectroscopical methods. Besides the already described desmethylyangonine its O4'-mono as well as the di(1-6)glucoside are found the first time.

The objective of this research was to evaluate the effects dynamic high pressure at different processing temperatures, on extraction bioactive compounds from Peruvian purple corn cob. cobs were ground and sieved then be mixed with an acidified 20% ethanol-water solution (pH 2) in a 1:30 (w/v) ratio. hydroalcoholic extracts subjected maceration processes varying temperature (25 °C 60 °C) (0.01 M...