Counterion binding by surfactant/β-cyclodextrin inclusion complexes

Sodium ion activities were determined potentiometrically in sodium dodecylsulfate and sodium dodecanoate solutions containing-cyclodextrin. Whereas sodium ion did not bind with-cyclodextrin, its activity decreased noticeably when the 1:1-cyclodextrin/surfactant inclusion complex was formed in solution. When the anionic guest was methyl red or methyl orange, no sodium ion binding occurred. When the guest was the cationic dodecylammonium ion in chloride solutions containing-cyclodextrin, pronounced chloride ion binding to the 1:1 inclusion complex occurred.     

EXPOSURE OF MICE TO UV-B RADIATION SUPPRESSES DELAYED HYPERSENSITIVITY TO Candida albicans

Groups of mice were exposed to a single dose of UV radiation before or after immunization with Candida albicans. The delayed type hypersensitivity (DTH) response was markedly depressed in all UV-irradiated groups. Exposure of mice to UV radiation before sensitization induced splenic suppressor cells that, upon transfer to normal recipients, impaired the induction of DTH to Candida. In contrast, exposure of mice to UV radiation after sensitization interfered with elicitation of the DTH response, but this suppression was not transferable. These studies demonstrate that immunity to Candida albicans in mice is impaired by exposure to UV radiation and that two separate mechanisms may be involved.