Book Reviews

THE INTERNATIONAL AIR TRANSPORT ASSOCIATION: A CASE STUDY OF A QUASI-GOVERNMENTAL ORGANIZATION By Richard Y. Chuang Leiden: A. W. Sijthoff, 1972. Pp. xviii, 185. $12.00. reviewer: Oliver J. Lissitzyn ================================= AMERICAN-GERMAN PRIVATE INTERNATIONAL LAW By Ulrich Drobnig Dobbs Ferry, New York: Oceana Publications for Parker School of Foreign and Comparative Law, 1972. Pp. 510.$18.00. (No. 4 Bilateral Studies in Private International Law, Rev. ed. of M. Domke, American. German Private Law Relations Cases 1945-1955 (1956) ). reviewer: M. Feri

Luminescence and cathodoluminescence properties of M^IPr(PO_3)_4(M^I=Na, Li,K) and PrP_5O_14

Poly-crystals of praseodymium phosphate M^IPr(PO_3)_4 (M^I=Na, Li, K) and PrP_5O_14 have been synthesized by the flux method. All of these hosts crystallized in the monoclinic structures with different space groups. The spectroscopic properties of trivalent praseodymium ions in these compounds have been characterized. The emission spectra under laser excitation at 488 nm show several characteristic emission bands of Pr^3+ resulting from intra-configurational transitions between ^3^P_0 and 4f^2 lower lying levels. All the studied compounds exhibit two strong parity-allowed 4f^15d^1 -> 4f^2 emission bands located in the near ultraviolet domain using electrons as source for optical excitation. Therefore, these materials are of interest for applications in lighting and scintillating applications

Abstracts from the 8th International Conference on cGMP Generators, Effectors and Therapeutic Implications

This work was supported by a restricted research grant of Bayer AG