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It have been stated optimal solubilization time of keratin was 4 hours by the boiling temperature of the solution; the solubilization process was of phasic character. The concentration of urea taken to solubilize should amount 60-70% by weight. It have been also observed that the efficiency of solubilization of keratin from feather is related to the ratio of keratin/urea.: The keratin contribution...
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