Artículos de revistas
Preparation of water and ethanolic extracts of propolis and evaluation of the preparations
Registro en:
Bioscience Biotechnology And Biochemistry. Taylor & Francis Ltd, v. 62, n. 11, n. 2230, n. 2232, 1998.
0916-8451
1347-6947
WOS:000077370800027
10.1271/bbb.62.2230
Autor
Park, YK
Ikegaki, M
Institución
Resumen
Propolis was extracted using water and various concentrations of ethanol as solvents. The extracts were investigated by measurement of absorption spectrum with a UV spectrophotometer, reversed phase-high pressure thin-layer chromatography and reversed phase-HPLC. Maximum absorption of all extracts was 290 nm, resembling flavonoid compounds, and the 80% ethanolic extract showed highest absorption at 290 nm. The most isosakuranetin, quercetin, and kaempferol were extracted from mixtures of propolis and 60% ethanol, while 70% ethanol extracted the most pinocembrin and sakuranetin, but 80% ethanol extracted more kaempferide, acacetin, and isorhamnetin from propolis;. The 60 to 80% ethanolic extracts of propolis strongly inhibited microbial growth and 70 and 80% ethanolic extracts had the greatest antioxidant activity and 80% ethanolic extract strongly inhibited hyaluronidase activity. 62 11 2230 2232