RUGH, R. Ph.D., Prof. — Radiobiol. Res. Lab. Dept. of Radiol., Coll. of Physicians 5 



Surgeons, Columbia Univ., 630 West 168th St., NEW YORK, N.Y. 10032, U.S.A. 

 a Heterosis and X-irradiation tolerance. Mus musculus (Rodentia) 

 h Sensitivity to irradiation of the fetal testes at different stages of development. Mus 



musculus (Rodentia) 

 c Reparation of the fetal eye following irradiation insult. Mus musculus (Rodentia) 

 d Behavior following low-level fetal X-irradiation. Rattus norvegicus (Rodentia) 

 e Neuropathological effects of ionizing radiations on the fetus. (Mammalia) 

 f Behavioral effects of the fetus X-rayed in utero. (Mammalia) 

 g Heterosis and the development of irradiation congenital anomalies. (Mammalia) 

 h Electroencephalographic analysis of brain following fetal irradiation. (Mammalia) 

 RUMPLER, Y. Dr.en Med. — Inst. d'EmbryoL. Fac. de Med., 1 Place de I'Hopital, STRAS- 

 BOURG, France 

 a Action d'un antithyroidien in vivo et in vitro. (Aves; Mammalia) 

 RUNNER, M. N. Ph.D., Prof. — Inst, for Developm. Biol., Univ. of Colorado, BOULDER, 



Colo. 80302, U.S.A. • 



RUNNSTROM, J. A. M. M.D., Ph.D., Prof. (Emer.) — The Wenner-Gren Inst.. Norrtulls- 



gatan 16, S-113 45 STOCKHOLM, Sweden • 



a The activation impulse in fertilization and artificial parthenogenesis. (Echinoidea) 

 b Fine cell structure. (Echinoidea) 

 c The bilateral organization of the egg. (Echinoidea) 

 d The role of the animal-vegetal balance in development; the character and mode of action 



of vegetal agents. (Echinoidea) 

 e Extraction and fractionation of animalizing and vegetalizing substances. Paracentrotus 



lividus (Echinoidea) (in collaboration with S. HORSTADIUS, Uppsala) 

 RUSAOUEN, Mrs. M. Dr. — Lab. de Zool., Fac. des Sci. de Grenoble, Cedex 53, 38 



GRENOBLE. France 

 RUSCH, H. P. M.D.. Prof. — McArdle Lab. for Cancer Research. Univ. of Wisconsin, 450 



N. Randall Ave., MADISON, Wis. 53706, U.S.A. 

 a Biochemical events associated with growth and differentiation (sporixlation). Physacum 



polycephalum (Myxomycetae) 

 RUSSO-CAIA, S. Prof.Inc. — 1st. di Istol. ed Embriol., Fac. di Sci., Univ. di Roma. Citta 



Universitaria. 00185 ROMA, Italy 

 a Biochemical and cytochemical studies on the regression of the mesonephros. Gallus gallus 



(Aves) 

 b Cytochemical and autoradiographic investigation on oogenesis. Mytilus edulis (Mollusca), 



Musca domestica (Diptera), Dytiscus marginalis (Coleoptera) 

 c Biochemistry and histochemistry of metamorphosis. Mus domestica (Diptera) 

 RUTH, R. F. Ph.D., Prof. — Dept. of Zool., Fac. of Sci., Univ. of Alberta. EDMONTON, 



Alta., Canada 

 a Immunogenetic analysis of graft rejection and graft-versus-host reactions in the very 



young animal. Gallus gallus (Aves) 

 h The origins of the immunoglobulins. Gallus gallus (Aves) 

 c Origin of the immunologically competent cell. Gallus gallus (Aves) 

 d Immunofluorescent localization of transplantation antigens in the developing animal. Gallus 



gallus (Aves) 

 e The histologic and metabolic maturation of the primordia of the lymphoid system. Gallus 



gallus (Aves) 

 RYABININA, Miss Z. A. Cand.biol.sci. — Inst, of Exper. Biol., Acad, of Med. Sci. of the 



U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315, U.S.S.R. 

 RYCHTER, Z. MUDr. — Dept. of Histol., Charles Univ., U.nemocnice 3, PRAHA 2, 



Czechoslovakia 

 RYCZKOWSKI, M. Dr. — Dept. of Plant Physiol., Jagellonian Univ., Grodzka 53. KRA- 

 KOW, Poland 

 a Physico-chemical and physiological properties of the developing ovule and embryo. (Mo- 



nocotyledonae. Dicotyledonae, Angiospermae; Gymnospermae) 



1. Osmotic gradients in the developing ovule and embryo (thermoelectric method) 



2. Changes in the osmotic value of the sap surrounding the developing embryo (thermo- 

 electric method) 



3. Physiological activity of the sap surrounding the developing embryo (Avena test) 



4. pH of the developing embryo and the surrounding sap (RIM method) 

 RYLAND, J. S. Ph.D. — Dept. of Zool., Univ. Coll. of Swansea, Singleton Park, SWAN- 

 SEA, Glamorganshire, Wales, U.K. 



RZEHAK, K. Ph.D. — Dept of Biol, and Embryol., Acad, of Med., ul. Kopemika 7. 

 KRAKOW, Poland 



SAAG. P. Th. M. van der M.Sc. — Hubrecht Lab. (Intern. Embryol. Inst.). Uppsalalaan 1, 

 Universiteitscentrum "De Uithof", UTRECHT, Netherlands 



a Patterns of nucleic acid and protein synthesis associated with neural and endo-mesodermal 

 competence in the blastula/gastrula stage. Amby stoma mexicanum (Urodela) (in col- 

 laboration with P. D. NIEUWKOOP and Miss G. A. UBBELS) 



150 



