Bulletin of the National Research Centre

Table 1 The growth of the wild type and variants during 21 days incubation. Data expressed as mean ± standard deviation

From: Evaluation of the benzo[a]anthracene biodegradation by animal bioassays

Variants	OD 600 of the Variants
Variants	Initial (zero time)	1 days	2 days	7 days	14 days	21 days
Wild type	1.40 ± 0.20	1.15 ± 0.01	1.17 ± 0.03	1.02 ± 0.03	0.87 ± 0.01^a	0.87 ± 0.05^a
V1	1.07 ± 0.02	0.92 ± 0.03	0.96 ± 0.03	0.78 ± 0.01	0.75 ± 0.00	0.64 ± 0.06 ^a
V2	1.12 ± 0.03	0.87 ± 0.02	0.87 ± 0.05	0.71 ± 0.08	0.67 ± 0.01	0.60 ± 0.08^a
V3	0.96 ± 0.01	0.81 ± 0.03	0.64 ± 0.01	0.42 ± 0.05	0.33 ± 0.03^a	0.39 ± 0.00
V4	1.07 ± 0.04	0.97 ± 0.09	0.96 ± 0.01	0.59 ± 0.01	0.42 ± 0.06^a	0.50 ± 0.06
V5	1.06 ± 0.06	0.88 ± 0.01	0.88 ± 0.04	0.56 ± 0.04^a	0.57 ± 0.02^a	0.57 ± 0.02^a

^asymbol mean the result of O D is significant from the initial for the same strain. The mean difference is significant at the 0.05 level. Data expressed as mean ± standard deviation significant results indicate OD decreased at that day as compared by the initial day for the same strain

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