Investigation of antiradical potential of different kinds of teas and extracts from these teas using antiradical activity units (TAU)
Journal Title: Advances in Hygiene and Experimental Medicine - Year 2011, Vol 65, Issue 0
Abstract
Introduction: Green, black and pu-erh teas are known to have strong antiradical properties in comparison to other plant raw materials. In this study fifteen different teas belonging to three types, green, black, and pu-erh tea (five of each kind), were investigated for their antiradical properties. Antiradical activity of extracts and raw materials was measured using DPPH and ABTS•+ radicals. Material/Methods: The antiradical potential of teas was measured using DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS•+ (2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt). The TAU515 and TAU734 (antiradical activity units) were defined with the tests of DPPH and ABTS•+, respectively, and the number of units was calculated per mg of extracts (TAU515/mg and TAU734/mg) and g of raw materials (TAU515/g and TAU734/g). Results/Discussion: When the extracts were investigated, the highest number of antiradical units (TAU515/mg; TAU734/mg) was found per mg of ethyl acetate extract obtained from green tea leaves assayed with DPPH and ABTS•+: 57.7±0.8; 106±2.0, units respectively. When the number of antiradical units TAU515/g was calculated per g of raw material, the highest antiradical potential (7601±92) was observed for green tea leaves. The greatest TAU734/g value (14 303±354) was also calculated for green tea leaves. The lowest value of antiradical activity units TAU515/g (684±30) and TAU734/g (1870±180) was calculated for pu-erh tea leaves. A high positive correlation was found between the antiradical activity of the raw materials and the content of phenolic compounds in these raw materials.
Authors and Affiliations
Damian Wojciechowski, Zbigniew Sroka, Andrzej Gamian
Keywords
Related Articles
- EP ID EP66581
- DOI -
- Views 167
- Downloads 0
Dipeptidyl peptidase IV: An attractive target for the development of effective diagnostic and therapeutic strategies
DPP IV is a peptidase with a catalytic activity and the ability to bind extracellular matrix proteins. It participates in the metabolism of glucose, gastrointestinal motility, the regulation of appetite and affects the f...
Oxidation and deamination of nucleobases as an epigenetic tool
Recent discoveries have demonstrated that 5-methylcytosine (5mC) may be hydroxymethylated to 5-hydroxymethylcytosine (5hmC) in mammals and that genomic DNA may contain about 0.02–0.7% of 5hmC. The aforementioned modific...
Infekcje ludzkim wirusem cytomegalii po transplantacji macierzystych komórek krwiotwórczych – metody diagnostyczne i znaczenie monitorowania poziomu DNA wirusa
Zakażenie wirusem hCMV jest powszechne. Nosicielami wirusa jest 30-90% populacji. U osób będących w stanie immunosupresji skuteczna eliminacja wirusa przez komórki efektorowe układu odpornościowego nie jest możliwa. Akty...
The clinical significance of fatty acid binding proteins
Excessive levels of free fatty acids are toxic to cells. The human body has evolved a defense mechanism in the form of small cytoplasmic proteins called fatty acid binding proteins (FABPs) that bind long-chain fatty acid...
Czy stężenie cystatyny C w surowicy jest lepszym markerem czynności nerek niż stężenie kreatyniny u noworodków z sepsą?
Wprowadzenie: Wyniki opublikowanych badań dowodzą, że oznaczanie cystatyny C w surowicy może stanowić lepszy marker czynności wydalniczej nerek niż stężenie kreatyniny w surowicy. Jednakże znaczenie tego markera w diagn...