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Bactericidal activity of catechin‐copper (II) complexes on Escherichia coli ATCC11775 in the absence of hydrogen peroxide
Author(s) -
Kimura T.,
Hoshino N.,
Yamaji A.,
Hayakawa F.,
Ando T.
Publication year - 1998
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1046/j.1472-765x.1998.00458.x
Subject(s) - hydrogen peroxide , escherichia coli , copper , chemistry , microbiology and biotechnology , catechin , bacteria , biochemistry , biology , antioxidant , organic chemistry , polyphenol , gene , genetics
Washed Escherichia coli ATCC11775 cells were killed by (–)‐epigallocatechin (EGC) in the presence of a non‐ lethal concentration of Cu 2+ (1 μmol l −1 ) without additional H 2 O 2 , but not by (–)‐epicatechin (EC). EGC alone (< 0·1 mmol l −1 ) did not reduce the viability of the cells. The survival curve obtained in the presence of EGC and Cu 2+ was similar to that obtained in the presence of (–)‐adrenaline (EN) and Cu 2+ .