| NUKLEONIKA 2010, 55(1):65-68
POSITRON ANNIHILATION AND SPEED OF SOUND IN THE SYSTEMS CONTAINING BETA-CYCLOTRONKazimierz Jerie1, Andrzej Baranowski1, Andrzej Burakowski2, Jacek Gliński2 1 Institute of Experimental Physics, University of Wroc³aw, 9 M. Borna Sq., 50-204 Wroc³aw, Poland 2 Faculty of Chemistry, University of Wroc³aw, 14 F. Joliot-Curie Str., 50-383 Wroc³aw, Poland Positron annihilation measurements were performed in aqueous solutions of beta-cyclodextrin, as well as in solid mixtures of this sugar with a long-chained alcohol, n-nonanol. Additionally, acoustic (sound speed, density and compressibility) experiments were done in aqueous beta-cyclodextrin and tert-butanol systems and in a three-component water-beta-cyclodextrin-tert-butanol system. The results show that in aqueous solution cyclodextrin does not form inclusive complexes with alcohol, while solid sugar-alcohol mixtures undergo slow changes in time, most probably caused by exchange of guest between interior and exterior of the host molecule. Close X |