Visualization of biological components such as cholesterol and fatty acids using TOF-SIMS.
The hair roots of human hair (both shed hair and pulled hair) were pressed against a Si wafer, and imaging measurements (surface analysis) were conducted on the transferred components. Shed hair shows a strong tendency for ■K and ●phospholipids to be present only at the tip of the hair root. Additionally, it is believed that the entire hair root contains ■CnHmCOOH (n=17–31) fatty acids (derived from human sebum), ●amide components derived from keratin plugs, ◆nitrogen-containing organic acids with a mass of 500–700, and ◆organic substances with a mass around 800 that are aggregated. However, the organic substances containing two COOH groups derived from human sebum, which are observed in pulled hair, show a weak tendency.
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