6 citations
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December 2019 in “International Journal of Cosmetic Science” This study found that tryptophan fluorescence in natural white hair is significantly weaker than in other unpigmented keratin fibers, possibly due to greater environmental UV exposure or unknown chemical interactions.
4 citations
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December 2020 in “International journal of research - granthaalayah” This study found that tetracycline can adhere to hair follicle structures and disrupt cell metabolism, potentially damaging healthy human cells as well as pathogens.
April 2026 in “Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy” 4 citations
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January 1993 in “Clinical Chemistry and Laboratory Medicine (CCLM)” This study developed a highly sensitive fluorescent assay for measuring enzyme activity in single hair follicles, allowing the efficient analysis of over 100 samples per day.
20 citations
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January 2010 in “Biological Trace Element Research”