Isolation and Study of Abies Bark Proanthocyanidins
| Autor: | Alexander V. Levdansky, Alexander A. Kondrasenko, Vladimir A. Levdansky, Maxim A. Lutoshkin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Ethanol
Chromatography 010405 organic chemistry General Chemical Engineering Cyanidin Extraction (chemistry) food and beverages Hydrochloric acid General Chemistry complex mixtures 01 natural sciences 0104 chemical sciences 010404 medicinal & biomolecular chemistry chemistry.chemical_compound chemistry Proanthocyanidin Gallic acid Delphinidin Prodelphinidin |
| Zdroj: | Journal of Siberian Federal University. Chemistry. :604-613 |
| ISSN: | 2313-6049 1998-2836 |
| DOI: | 10.17516/1998-2836-0155 |
| Popis: | The process of proanthocyanidins isolation from abies bark by water and water-alcohol solutions containing 5, 10, 15 and 20 % ethanol was studied for the first time. The optimal conditions providing the maximum yield of proanthocyanidins were determined experimentally. It was shown that the use of 15-20 % water-alcohol solutions allows to increase the yield of proanthocyanidins from 0.33 to 0.38 %. The composition of the obtained proanthocyanidins was studied by UV, IR, and 13C NMR spectroscopy. The obtained proanthocyanidins were transformed into colored anthocyanidins in ethanol medium in the presence of hydrochloric acid. The flavonoids cyanidin and delphinidin were isolated and identified. It was established that the obtained proanthocyanidins mainly consist of procyanidin and prodelphinidin. It was shown that proanthocyanidins obtained from abies bark, in contrast to the proanthocyanidins isolated from pine bark described in the literature, contain gallic acid residues, which is typical for proanthocyanidins isolated from various types of tea |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|