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19th Annual Meeting of the American Society for Photobiology San Antonio, TX, U.S.A., June 22-26, 1991. (Additional information in Newsletter No.

25.)

9th International Congress of Radiation Research Sheraton Centre, Toronto, Canada, July 7-12, 1991. (Additional information in Newsletter

No. 25.)

3rd Meeting of the Panamerican Society for Pigment Cell Research Bernard SneII Hall, University of Alberta, Edmonton, Aka., Canada, July 11-13, 1991.

(Additional information in Newsletter No. 25.)

XVth International Conference on Photochemistry Paris, Prance, July a&August 2, 1991.

Contact: Dr. J. Pouiiquen, Laboratoire de Photochimie Solaiie, CNRS, BP 28, 2-8 rue H. Dunant, 94320 Thiais, Prance.

International Meeting on the Regulation of Chloroplast Biogenesis Crete, Greece, July 28-August 2, 1991. (Additional information in Newsletter No. 25.)

4th Congress of the European Society for Photobiology RAI Congress Center, Amsterdam, The Netherlands, September 1-6, 1991.

Contact: Secretariat of the 4th ESP Congress, Dr. Len Roza, TN0 Medical Biological Laboratory, P.O. Box 45, 2280 AA R@wijk, The Netherlands.

Photoprocesses in Transition Metal Complexes, Biosystems and Other Molecules, a NATO Advanced Study Institute

Aussois, Prance September 1-13, 1991. Director: E. Kochanski (Strasbourg). Organizing Committee: V. Balzani (Bologna), A. Riera (Madrid), J. P. Sauvage (Strasbourg), R. Volts (Strasbourg). Deadline: March 1, 1991. Contact: Dr. E. Kochanski, Laboratoire de Chimie Theorique, Institut de Chimie, Universite Louis Pasteur, BP 296, 67008 Strasbourg CCdex, Prance.

Beltsvllle Symposia in Agricultural Research. XVI. Photomorphogenesis in Plants: Emerging Strategies for Crop Improvement

University of Maryland, College Park, MD, U.S.A., September 22-27, 1991. (Additional information in Newsletter No. 25.)

2nd Congress European Academy of Dermatology and Venereology (BADV Athens, Greece, October 19-13, 1991. (Additional information in Newsletter No. 25.)

Analytical Use of Fluorescent Probes in Oncology Montpeiber, Prance, October 15-17, 1991. (Additional information in Newsletter No. 25.)

International Conference on Photodynamic Therapy and baser Medicine Beijing, China, October 15-17, 1991. (Additional information in Newsletter No. 25.)