色素化学：河马的红色汗液
Pigment chemistry: the red sweat of the hippopotamus.
作者信息
Saikawa Yoko, Hashimoto Kimiko, Nakata Masaya, Yoshihara Masato, Nagai Kiyoshi, Ida Motoyasu, Komiya Teruyuki
机构信息
Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
出版信息
Nature. 2004 May 27;429(6990):363. doi: 10.1038/429363a.
Within a few minutes of perspiration, the colourless, viscous sweat of the hippopotamus gradually turns red, and then brown as the pigment polymerizes. Here we isolate and characterize the pigments responsible for this colour reaction. The unstable red and orange pigments turn out to be non-benzenoid aromatic compounds that are unexpectedly acidic and have antibiotic as well as sunscreen activity.
出汗几分钟内，河马无色、黏稠的汗液会逐渐变红，随着色素聚合，随后变为褐色。在此我们分离并鉴定了引发这种颜色反应的色素。结果发现，不稳定的红色和橙色色素是非苯型芳香化合物，出人意料的是，它们呈酸性，具有抗生素和防晒活性。
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