Antiradical activity and amount of phenolic compounds in extracts obtained from some plant raw materials containing methylxanthine alkaloids

Herba Polonica

Sroka Zbigniew¹  Janiak Maria¹  Dryś Andrzej² 

[1] Department of Pharmacognosy, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211a, 50-556 Wroclaw, Poland;Department of Physical Chemistry Faculty of Pharmacy, Wrocław Medical University, Borowska 211a, 50-556 Wrocław, Poland;

关键词: antioxidants;    free radical scavengers;    plant extracts;    plant phenolics;    methylxanthine alkaloid raw materials;    antiradical units;    przeciwutleniacze;    zmiatacze wolnych rodników;    wyciągi roślinne;    fenole roślinne;    surowce zawierające alkaloidy metyloksantynowe;    jednostki przeciwrodnikowe;   

DOI  :  10.1515/hepo-2015-0022

来源: DOAJ

【 摘 要 】

Raw materials containing methylxanthine alkaloids such as yerba mate, guaraná, white and green tea, coffee seeds, chocolate and cacao seed powder and extracts obtained from these raw materials were investigated for their antioxidant features and the amount of phenolic compounds. The level of phenolic compounds was measured with the colorimetric method using Folin-Ciocalteu’s phenol reagent and antioxidant features was determined with the use of DPPH (2,2-diphenyl-1-picrylhydrazyl radical). Amounts of phenolic compounds were presented in percentages per mass of extracts and mass of raw materials. Antiradical potential was shown as the number of TAUDPPH units per mg of extracts and g of raw materials. The highest number of antiradical units TAUDPPH as well as the amount of phenolic compounds was calculated for white tea and its extracts and lowest for chocolate. The correlation coefficient between the content of phenolics and antiradical features of raw materials is equal to r=0.994.

【 授权许可】

Unknown