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Investigation of antiradical potential of different kinds of teas and extracts from these teas using antiradical activity units (TAU).
Postepy Hig Med Dosw (Online). 2011 Nov 30; 65:796-803.PH

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 (TAU(515/mg) and TAU(734/mg)) and g of raw materials (TAU(515/g) and TAU(734/g)).

RESULTS/DISCUSSION

When the extracts were investigated, the highest number of antiradical units (TAU(515/mg); TAU(734/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 TAU(515/g) was calculated per g of raw material, the highest antiradical potential (7601±92) was observed for green tea leaves. The greatest TAU(734/g) value (14,303±354) was also calculated for green tea leaves. The lowest value of antiradical activity units TAU(515/g) (684±30) and TAU(734/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+Show Affiliations

Department of Pharmacognosy, Wrocław Medical University, Wrocław, Poland.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22173444

Citation

Wojciechowski, Damian, et al. "Investigation of Antiradical Potential of Different Kinds of Teas and Extracts From These Teas Using Antiradical Activity Units (TAU)." Postepy Higieny I Medycyny Doswiadczalnej (Online), vol. 65, 2011, pp. 796-803.
Wojciechowski D, Sroka Z, Gamian A. Investigation of antiradical potential of different kinds of teas and extracts from these teas using antiradical activity units (TAU). Postepy Hig Med Dosw (Online). 2011;65:796-803.
Wojciechowski, D., Sroka, Z., & Gamian, A. (2011). Investigation of antiradical potential of different kinds of teas and extracts from these teas using antiradical activity units (TAU). Postepy Higieny I Medycyny Doswiadczalnej (Online), 65, 796-803.
Wojciechowski D, Sroka Z, Gamian A. Investigation of Antiradical Potential of Different Kinds of Teas and Extracts From These Teas Using Antiradical Activity Units (TAU). Postepy Hig Med Dosw (Online). 2011 Nov 30;65:796-803. PubMed PMID: 22173444.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Investigation of antiradical potential of different kinds of teas and extracts from these teas using antiradical activity units (TAU). AU - Wojciechowski,Damian, AU - Sroka,Zbigniew, AU - Gamian,Andrzej, Y1 - 2011/11/30/ PY - 2011/12/17/entrez PY - 2011/12/17/pubmed PY - 2012/5/23/medline SP - 796 EP - 803 JF - Postepy higieny i medycyny doswiadczalnej (Online) JO - Postepy Hig Med Dosw (Online) VL - 65 N2 - 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 (TAU(515/mg) and TAU(734/mg)) and g of raw materials (TAU(515/g) and TAU(734/g)). RESULTS/DISCUSSION: When the extracts were investigated, the highest number of antiradical units (TAU(515/mg); TAU(734/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 TAU(515/g) was calculated per g of raw material, the highest antiradical potential (7601±92) was observed for green tea leaves. The greatest TAU(734/g) value (14,303±354) was also calculated for green tea leaves. The lowest value of antiradical activity units TAU(515/g) (684±30) and TAU(734/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. SN - 1732-2693 UR - https://www.unboundmedicine.com/medline/citation/22173444/Investigation_of_antiradical_potential_of_different_kinds_of_teas_and_extracts_from_these_teas_using_antiradical_activity_units__TAU__ L2 - http://www.phmd.pl/fulltxt.php?ICID=968073 DB - PRIME DP - Unbound Medicine ER -