| 摘要 |
Protein is treated with cyanamide or a sodium or calcium salt thereof in an aqueous solution of sodium or potassium hydroxide. The protein is in the form of gelatine, casein, cereal flour, or cereal flour gluten. The reaction may be carried out at 40 DEG C. and pH 10.4 and the product precipitated by means of isopropanol.ALSO:Wood is treated with cyanamide or a sodium or calcium salt thereof in an aqueous solution of sodium or potassium hydroxide. Discoloration of painted pine wood is decreased by pretreatment with a sodium hydroxide solution of cyanamide followed by reduction of pH with hydrochloric acid, washing with water and air-drying.ALSO:Wool is treated with cyanamide or a sodium or calcium salt thereof in an aqueous solution of sodium or potassium hydroxide at a pH of at least 10. Wool flannel is treated with a sodium hydroxide solution of cyanamide followed by reduction of pH with hydrochloric acid, washing and air-drying.
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