Research on the Impact and Mechanism for the Inhibition of Micrococcus Catalase Activity by Typical Tetracyclines

Table 1

Stern-Volmer quenching constants for the quenching of TCs on CAT at emission wavelengths of 307.0 nm and 344.4 nm, respectively.

TCs		(10^12 Lmol^-1 s^-1, 307.0 nm)	(10^12 Lmol^-1 s^-1, 344.4 nm)
Tetracycline	100 mg/L	2.04	2.19
	300 mg/L	2.81	2.59
	500 mg/L	3.58	3.15
	1000 mg/L	4.49	4.67
	1500 mg/L	5.45	5.05
Chlortetracycline	100 mg/L	2.96	1.25
	300 mg/L	3.43	3.22
	500 mg/L	3.00	2.51
	1000 mg/L	4.58	4.23
	1500 mg/L	5.26	4.08
Oxytetracycline	100 mg/L	2.27	4.41
	300 mg/L	3.33	4.01
	500 mg/L	3.62	4.52
	1000 mg/L	4.44	5.46
	1500 mg/L	6.05	6.63
Doxycycline	100 mg/L	2.07	3.16
	300 mg/L	5.72	6.57
	500 mg/L	3.45	4.32
	1000 mg/L	4.85	5.81
	1500 mg/L	5.30	6.18