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Table 3 ROS-production (mean ± SD) in beef and dairy bull semen (n = 17 and 20 respectively)

From: Sperm quality in frozen beef and dairy bull semen

ROS category Beef Dairy Beef + MEN Dairy + MEN
Live superoxide negative (%) 57 ± 18a 35 ± 14a 62 ± 23b 37 ± 12b
Live superoxide positive (%) 8 ± 3a 25 ± 7a 6 ± 6b 24 ± 10b
Dead superoxide positive (%) 36 ± 17 40 ± 11 32 ± 20 39 ± 9
Live hydrogen peroxide negative (%) 61 ± 23 61 ± 11 68 ± 20 62 ± 9
Live hydrogen peroxide positive (%) 4 ± 14 0.2 ± 0.3 0.6 ± 1.2* 0.1 ± 0.1*
Dead hydrogen peroxide negative (%) 31 ± 16* 39 ± 11* 30 ± 19* 39 ± 9*
Dead hydrogen peroxide positive (%) 4 ± 11 0.08 ± 0.2 1.2 ± 2.9 0.05 ± 0.08
  1. Same superscripts within a row indicate significant difference (P < 0.001)
  2. MEN menadione
  3. * Denotes trend towards significance: for live hydrogen peroxide positive with menadione P < 0.055; for dead hydrogen peroxide negative P < 0.08; for dead hydrogen peroxide negative with menadione P < 0.066