Optimization of Keratin Hydrolysate Extraction from Tannery Sheep Hair Waste

Figure 4

Biuret test for KH extract (a) 95°C, 1 N & 1.5 hr (b) 65°C, 1 N and 3.5 hr (c) 80°C, 0.5 N and 1.5 hr (d) 80°C, 0.5 N and 3.5 hr.