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Table 3 The activity of superoxide dismutase (SOD) in some organs of birds exposed to cyanide directly and indirectly in their feed

From: The chronic effects of cyanide on oxidative stress indices in the domestic chicken (Gallus domesticus L.)

Groups Direct exposure Exposure via
food
Organs I (control) II (1 mg CN−1/kg bwt) III (2 mg CN−1/kg bwt) IV (3 mg CN−1/kg bwt) V (1 mg CN−1/kg bwt) VI (2 mg CN−1/kg bwt) VII (3 mg CN−1/kg bwt)
4 weeks exposure
 Liver 43.46 ± 0.8a 37.25 ± 0.6a 32.01 ± 0.5b 23.07 ± 0.3c 40.50 ± 0.5a 36.25 ± 0.7a 29.18 ± 5b
 Kidney 31.10 ± 0.4a 29.63 ± 0.7a 18.52 ± 0.3b 14.23 ± 0.6b 30.74 ± 0.4a 27.78 ± 0.5a 17.67 ± 3b
 Heart 35.32 ± 0.7a 29.17 ± 0.9a 25.10 ± 0.4b 18.10 ± 0.8c 33.34 ± 0.6a 27.09 ± 0.3a 22.92 ± 4b
 Brain 31.24 ± 0.5a 30.01 ± 0.4a 18.19 ± 0.3b 14.10 ± 0.9b 32.37 ± 0.5a 21.32 ± 0.6b 18.48 ± 3b
8 weeks exposure
 Liver 45.14 ± 0.8a 36.50 ± 0.7ab 34.52 ± 0.6b 24.92 ± 0.5c 38.15 ± 0.6a 37.42 ± 0.3b 28.10 ± 0.6c
 Kidney 33.95 ± 0.5a 25.93 ± 0.6a 18.78 ± 0.7b 12.15 ± 0.6b 28.19 ± 0.4a 26.08 ± 0.4a 14.81 ± 0.5b
 Heart 37.15 ± 0.5a 27.10 ± 0.04b 23.12 ± 0.4b 17.95 ± 0.8b 31.25 ± 0.7a 25.74 ± 0.6b 20.84 ± 0.8b
 Brain 33.08 ± 0.4a 25.10 ± 0.5b 17.69 ± 0.9c 13.95 ± 0.3c 31.82 ± 0.4a 20.46 ± 0.3b 15.69 ± 0.4c
12 weeks exposure
 Liver 46.78 ± 0.4a 36.10 ± 0.7b 30.43 ± 0.8b 22.74 ± 0.9c 42.62 ± 0.4a 32.18 ± 0.6b 26.41 ± 0.5c
 Kidney 34.15 ± 0.9a 27.78 ± 0.4a 18.52 ± 0.7b 11.26 ± 0.9b 30.50 ± 0.8a 24.19 ± 0.8a 14.82 ± 0.4b
 Heart 38.98 ± 0.7a 32.10 ± 0.9a 27.92 ± 0.6b 15.87 ± 0.8c 35.95 ± 0.9a 28.01 ± 0.5b 18.75 ± 0.3c
 Brain 35.04 ± 0.8a 31.73 ± 0.5a 25.92 ± 0.6b 12.78 ± 0.6c 34.52 ± 0.7a 19.92 ± 0.5bc 15.75 ± 0.8c
  1. Means not sharing a common superscript (a, b, c) on the same row differ significantly (p < 0.05)
  2. The results are expressed as mean ± standard deviation (n = 6)
  3. The activity of SOD is given in units per gram tissue
  4. bwt body weight