Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 2

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  ethanolic extract
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

Effect of the solvent on the extraction of polyphenols from distillery stillage and on their antioxidant activity

100%
Mikucka W., Zielińska M.
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
|
2021
|
vol. 17
54-62
EN
The increase in the costs of storage and disposal of post-production residues has resulted in the search for new directions for their recycling, which is closely related to the necessity of protecting the natural environment and promoting a circular economy. Moreover, the apparent interest shown by the food market in raw materials with high antioxidant activity implies an increasing use of by-products. The objective of the study was to determine the effect of the type and concentration of the solvent on the efficiency of extracting polyphenols from distillery stillage as well as their antioxidant activity by using several solvents: methanol:water (70:30 v/v), methanol:water (100:0 v/v), ethanol:water (70:30 v/v) or ethanol:water (100:0 v/v). The DPPH radical method was used to determine the antioxidant activity of the obtained extracts. The normalised variable (NV) and statistical measure (MS) were determined, based on which the effectiveness of the solvents was evaluated. The highest polyphenolic content and the antioxidant activity were obtained by using ethanol:water (70:30 v/v) as a solvent in the extraction of polyphenolic compounds from distillery stillage.
2
Publication available in full text mode
Content available

Characterization of Catechins from Smilax domingensis Willd. in Cuba

100%
Soledispa P. A., González J., Cuéllar A., Pérez J., Monan M.
World News of Natural Sciences
|
2019
|
vol. 23
297-305
EN
Gas Chromatography coupled with mass spectrometry was applied to study the fragmentation of selected flavonoids from the ethanolic extract of Smilax domingensis Willd., Smilacaceae, known as zarzaparrilla, after Soxhlet extraction during 20 hours. Compounds belonging to one of the major subgroups found in common plants, i.e. flavanols were studied. Following solvent extraction and derivatization using BSTFA, possibly two different metabolites from the same chemical group were characterized in one analytical run: (+)-catechin and (-)-epicatechin. For the very first time, qualitative data on these analytes in the drug were determined after detailed validation of a sensitive, cheap and reliable GC-MS method.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.