Investigations of discoloured wools

Włochowicz, A.; Poklewska‐Koziełł, K.

doi:10.1002/actp.1986.010371109

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1995

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“…The yellowing of wool under light irradiation is associ ated with the conversion of tryptophan residues of wool protein to N-formylkinurenine residues and accompanied by a certain extent of the decomposition of cystine re sidues (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) . This implies that keratin of dyed furs will also be deteriorated by light irradiation along with discoloration of dyed furs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Protein Deterioration of Dyed Wool Powdrs under Light Irradiation.

Imai¹,

Shirai

1995

Sen-i Gakkaishi

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In order to establish the evaluation methods for the light stability of fur products, protein solubilities and amino acid compositions of dyed and un-dyed wool powders were examined after the irradiation of ultraviolet ray. The protein solubility of wool powders in M/20 sodium carbonate at 20 •Ž for 2 h increased with irradiation time, corresponding to the protein deterioration caused by the irradiation. Such a deterioration was also evaluated with the decrease in the content of the half-cystine residue. Two parameters (protein solubility and the decrease in half-cystine) are considered to be adoptable as the indices of protein deterioration of dyed fur products under light irradiation.

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