Microméthode d'analyse dos esters hétérosidiques de l'acide caféique

Morphology and Histochemistry of the Glandular Trichomes of Lippia scaberrima (Verbenaceae)

“…Terpenoid secretion was found to be restricted to L-GSTs, while the presence of phenolic compounds in S-GSTs was indicated by various colour reactions. Natural Product reagent was used to enhance the natural autofluorescence of phenolic compounds (Andary et al, 1984). Autofluorescence is diagnostic of flavonoids, which, depending on the structural type, show dark yellow, green or blue fluorescence under UV-365 nm light (Wagner and Bladt, 1996).…”

Polar Constituents ofCalceolaria ascendens1

“…Compound 6 (40 mg) was treated with 2 N H2S04 (30 ml) at 100°C for 1 h. The reaction mixture was directly analyzed by HPTLC according to the micromethod proposed by Andary et al (12), with identification of n-glucose and D-apiose among the products of the hydrolysis.…”

Carbohydrates

“…Hydrolysis is usually done with hydrochloric acid, sulfuric acid, or trifluoroacetic acid at concentrations ranging from 0.5 M to up to several moles per liter, and at elevated temperatures. Detailed procedures are described in the literature (25)(26)(27)(28)(29)(30).…”

“…The hydrolysates of plant glycosides usually contain interfering compounds such as phenolics. These can be removed by extracting the hydrolysates with diethyl ether or ethyl acetate (26).…”