Puccetti G, Leblanc R M
Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA.
Photochem Photobiol. 2000 Apr;71(4):426-30. doi: 10.1562/0031-8655(2000)071<0426:astcvo>2.0.co;2.
The self-tanning agent dihydroxyacetone (DHA) was applied to human skin samples, and its effect on light absorption was followed in time to study the DHA influence inside the different layers of skin. Application of DHA shows increased light absorption in the visible light region, as evidenced by skin tanning. The tanning effect is enhanced by UV irradiation and appears localized in the near-stratum corneum layer as revealed by depth analysis of the time signal. As a reference, application of an emulsion containing titanium dioxide particles shows clear surface stability and a screening of light penetration beyond the stratum corneum.
将自晒黑剂二羟基丙酮（DHA）应用于人体皮肤样本，并及时跟踪其对光吸收的影响，以研究DHA在皮肤不同层内的作用。DHA的应用显示出在可见光区域光吸收增加，皮肤晒黑就是证明。紫外线照射可增强晒黑效果，并且如通过时间信号的深度分析所揭示的，晒黑效果似乎局限于角质层附近。作为对照，应用含有二氧化钛颗粒的乳液显示出明显的表面稳定性，并能屏蔽穿透角质层的光线。
