Concentration-Dependent Protection by Ethanol Extract of Propolis against γ-Ray-Induced Chromosome Damage in Human Blood Lymphocytes

Table 1

Dicentric cell distribution and frequencies (𝑌±𝑆𝐸), dispersion index (DI) and normalized unit of this index (𝑈) for each conditions and with 2 Gy gamma rays.

EEP (𝜇g⋅mL^-1)	Cell scored	dic	Cell with 0 dic	Cell with 1 dic	Cell with 2 dic	𝑌±SE	DI	𝑈
0	302	100	216	72	14	0.33 ± 0.03	0.95	−0.59
0 + 95% EtOH^1	411	101	316	89	6	0.24 ± 0.02	0.88	−1.80
1000^2	325	100	238	74	13	0.31 ± 0.03	0.94	−0.73
20	438	102	346	82	10	0.23 ± 0.02	0.97	−0.51
40	462	100	370	84	8	0.22 ± 0.02	0.95	−0.83
120	379	78	308	64	7	0.21 ± 0.02	0.98	−0.33
250	509	102	412	92	5	0.20 ± 0.02	0.90	−1.61
500	528	100	436	84	8	0.19 ± 0.02	0.97	−0.45
750	554	101	458	91	5	0.18 ± 0.02	0.92	−1.36
1000	649	101	556	85	8	0.16 ± 0.02	1.00	0.08
2000	590	97	501	81	8	0.16 ± 0.02	1.00	0.04

EEP: Ethanol extract of propolis; dic: dicentrics; 𝑌±SE: Frequencies of dicentrics ± standard errors; DI: Dispersion index (variance/mean); 𝑈: Normalized Unit of D; ¹0 + 95% EtOH: without propolis and with 250 𝜇L of ethanol 95%; ²1000 after: EEP added just after irradiation.