Fig. 4

Effect of organic nitrogen source on keratinase production by Arthrobacter sp. NFH5. The fermentation was carried out at 37 °C with pH 7.5 at 150 rpm for 72 h. Data represent the means ± standard deviations for triplicate
Effect of organic nitrogen source on keratinase production by Arthrobacter sp. NFH5. The fermentation was carried out at 37 °C with pH 7.5 at 150 rpm for 72 h. Data represent the means ± standard deviations for triplicate