RUGH, R. A.B.. M.A., Ph.D., M. 1. 1. E. — Radiological Research Lab., Dept. 

 of Radiol., Coll. of Physicians & Surgeons, Columbia Univ., 630 West 

 168th St.. NEW YORK 32. N.Y., U.S.A. 



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



b. Sensitivity to irradiation of the fetal testes at different stages of develop- 

 ment. 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) 



RULON, G. O. Ph.D. — Dept. of Biol. Sci., Northwestern Univ., EVAN- 

 STON, III, U.S.A. 



a. The control of growth and differentiation through the use of enzyme 

 inhibitors and activators. (Echinoidea) 



b. The control of head forms and reconstitutional processes with enzyme 

 inhibitors. ( Planariidae , Turbellatia) 



RUNNER, M. N. Ph.D. — Roscoe B. Jackson Memorial Lab., BAR HAR- 

 BOR, Me., U.S.A. 



a. Hormonal induction of ovulation, conception and pregnancy in prepuberal 

 animals. Mus musculus (Rodentia) 



b. Parental and dietary influences on skeletal morphogenesis. Mus mus- 

 culus (Rodentia) 



c. Carbohydrate metabolism in relation to chemically induced phenocopies 

 of the skeleton. Mus musculus (Rodentia) 



d. Hereditary susceptibility to congenital deformity. Mus musculus (Ro- 

 dentia) 



RUNNSTR5M. J. A. M. Ph.D., M.D., F.I.I.E., Prof. (Emer) — Wenner- 

 Grens Inst, for exper. Biol., Norrtullsgatan 16, STOCKHOLM Va., 

 Sweden 



a. The activation impulse in fertilization and artificial parthenogenesis. 

 (Echinoidea) 



b. Fine cell structure and cell division. (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 the vegetal agents. (Echinoidea) 



RUSSELL (BRAUCH), Mrs. L. Ph.D. — Mammalian Genet, and Develop- 

 ment Sect., Biol. Div., Oak Ridge Nat. Lab., P.O. Box Y, OAK RIDGE, 

 Tenn., U.S.A. 



a. Comparison of the effects of continuous irradiation with those of single, 

 acute doses given during embryonic development. Mus musculus (Ro- 

 dentia) 



b. Effects of irradiation of early cleavage stages. Mus musculus (Rodentia) 



RUTH R F. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 

 Wolfe and Madison Sts., BALTIMORE 5, Md., U.S.A. 



a. Biochemical and immunochemical analysis of the synthesis and distri- 

 bution of the contractile proteins, actin, myosin (esp. H-meromyosin) and 

 tropomyosin in the development of the heart in the early embryo. Gallus 

 gallus (Aves) fin collaboration with J. D. EBERT) 



b. Cytochemistry of leukocytes during development of lymphoidal organs. 

 Gallus gallus (Aves), Cavia porcellus (Rodentia) 



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