To demonstrate that the tryptophan (Trp) fluorescence of natural white hair is much weaker than other unpigmented keratin fibres such as wool, cashmere, rabbit hair and mink fur, and to explore possible reasons for this behaviour. The origin of the blue visible fluorescence (~450 nm) excited by UVA radiation in the range 360—380 nm, often associated with Trp degradation products, is also discussed and compared to other fibrous and globular proteins.

中文翻译：

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与其他未染色角蛋白纤维相比，白发的异常荧光

证明天然白发的色氨酸 (Trp) 荧光比其他未染色的角蛋白纤维（如羊毛、羊绒、兔毛和水貂毛）弱得多，并探索这种行为的可能原因。还讨论了由 360-380 nm 范围内的 UVA 辐射激发的蓝色可见荧光（~450 nm）的起源，通常与色氨酸降解产物有关，并与其他纤维状和球状蛋白质进行了比较。