Abstract
IT has been found possible to deamide animal and plant caseins by treatment with a solution of 1 per cent caustic soda for 40 hr. at 45° C. The desamido casein, when hardened with formaldehyde under neutral conditions, combines with the same amount of formaldehyde as does the untreated casein. In the presence of salts, acids (for example, saturated calcium chloride solution and hydrochloric acid) and formaldehyde, the neutral hardened deamided material combines with no additional formaldehyde, whereas the untreated neutral hardened casein may increase its formaldehyde content by about 100 per cent.
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WORMELL, R., KAYE, M. Reaction between Proteins and Formaldehyde. Nature 153, 525 (1944). https://doi.org/10.1038/153525a0
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DOI: https://doi.org/10.1038/153525a0
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