a Study of the role of sulfhydryl groups in primary organizer action by grafting and culturing in 



vitro pieces of early blastoderms. Callus domesticus ( Aves) 

 b Role of surface properties of blastoderm cells in morphogenetic movements; isoelectrofocusing of 



living cells to determine surface charge. Same species as a 

 c Nucleic acid synthesis in the early embryo. Planorbis exustus, Lymnaea stagnalis (Gastropoda) 

 RAPPAPORT, R., Jr.; Ph.D., Prof. - Dept. of Biol. Sci., Union Coll., SCHENECTADY, NY 12308, 



U.S.A. 

 RASCH (MYRBERG), Mrs. E. M; Ph.D., Prof. - Dept. of Biol., Marquette Univ., 530 N. 15th St.. 



MILWAUKEE, Wis. 53233, U.S.A. 

 a Atypical nucleoprotein synthesis during larval development. Sciara coprophila (Diptera) 

 b Cytochemistry and fine structural analysis of puffs in giant chromosomes. Same species as a 

 c Triploidy in a gynogenetic form. Poecilia formosa (Teleostei) 



RASH, J. - Dept. of Molec, Cell. Developm. Biol., Univ. of Colorado, BOULDER, CO 80302, U.S.A. 

 RASWEILER, J. J., IV; Ph.D. - Dept. of Anat., Coll. of Phys. and Surg., Columbia Univ., 630 W. 



168th St., NEW YORK, NY 10032, U.S.A. 

 a Comparative morphology of the early embryo and associated changes in the female reproductive 



tract, through the time of ovum implantation (light, transmission and scanning electron micro- 

 scopy). Glossophaga soricina, Artibeus lituratus, Noctilio labialis, Carollia perspicillata, Desmodus 



rotundus, Peropteryx kappleri (Chiroptera) 

 b Maintenance and breeding in the laboratory. (Chiroptera) 

 RATTNER, J. B.; Ph.D. - Dept. of Developm. and Cell Biol., Univ. of California, IRVINE, Calif. 



92664, U.S.A. 

 a Laser microbeam studies on centrioles and chromosomes for the study of mitosis. Potorous 



tridactylus (Marsupialia) 

 RAWLES (SPURBECK), Mrs. M. E.; Ph.D. - 4000 N. Charles St., BALTIMORE, MD 21218, U.S.A. 



ISDB 

 REAMS, W. M., Jr.; Ph.D., Prof. - Dept. of Biol., Univ. of Richmond, RICHMOND, Va. 23173, 



U.S.A. 

 a Effects of tissue environment on pigment cell morphogenesis. Gallus domesticus (Aves), Mus 



musculus (Rodentia) 

 b Factors affecting pigment behaviour in the skin. Same species as a 

 c The Langerhans cell: origin and differentiation. Mus musculus (Rodentia) 

 REDMAN, R. S.; Ph.D., Assoc. Prof. - Div. of Oral Biol, School of Dent., Univ. of Minnesota, 



MINNEAPOLIS, Minn. 55455, U.S.A. 

 a Parotid gland: ductal development (light and electron microscopy); cell types involved in 



proliferation (electron microscopy, radioautography); effects of dietary changes on develop- 

 mental pace (biochemical assay of exocrine enzymes and protein, light microscopy). Rattus 



rattus (Rodentia) 

 b Minor salivary glands: initiation, ductal development, and acinar or alveolar differentiation; (.light 



and electron microscopy, histochemistry). Same species as a 

 REEDER, R. H.; Ph.D. - Dept. of Embryol., Carnegie Inst, of Wash., 115 W. University Parkway, 



BALTIMORE, Md. 21210, U.S.A. 

 a Analysis of proteins on the ribosomal genes of oocytes. Xenopus laevis (Anura) (with 



T. HIGASHINAKAGAWA) 

 REESE, D. H.; Ph.D. - Biol. Div., Oak Ridge Natl. Lab., P.O. Box Y, OAK RIDGE, TN 37830, U.S.A. 

 REEVES, O. R.; Ph.D. - Dept. of Zool., Univ. of Brit. Columbia, VANCOUVER, B. C. V6T 1W5, 



Canada 

 a Biochemical control mechanisms involved in the regulation of differential gene expression during 



early embryonic stages (specifically regulation of RNA synthesis). Xenopus laevis (Anura) 

 b The role of direct intercellular communication in development; possible importance in the 



regulation of gene activity (cell and embryo culture). Same species as a 

 RENNERT, O. M.; M.D., Assoc. Prof. - Dept. of Pediat. and Biochem., Coll. of Med., Univ. of 



Florida, GAINESVILLE, Fla. 32601, U.S.A. 

 a Modification of isoaccepting species of transfer RNA isolated from embryos and adult liver and 



spleen (amino acyl-tRNA reaction, reverse phase chromatography). Mus musculus, Rattus 



norvegicus (Rodentia) 

 b Isoleucyl-tRNA formation as a controlling factor in the 'turning-off of fetal hemoglobin' produc- 

 tion. (Rodentia) 

 c Identification of species of isopentenyl-tRNA's during embryonic development. Same species as a 

 REPORTER, M. C; Ph.D. - Charles F. Kettering Res. Labs., 150 E. South College St., YELLOW 



SPRINGS, OH 45387, U.S.A. 

 RESTELLI, M. A.; M.D. - Inst, de Embriol., Biol, e Histol., Fac. de Cienc. Med., Univ. Nac. de La 



Plata, 60 y 120, LA PLATA, Argentina 

 REYER, R. W.; Ph.D., Prof. - Dept. ol Anat., Med. Center, West Virginia Univ., MORGANTOWN, 



W.Va 26506, U.S.A. ISDB 



a Causal mechanisms involved in lens regeneration from the dorsal iris and their relation to the 



processes of lens induction in the embryo. Notophthalmus viridescens (Urodela) 

 b DNA synthesis, cell division and cell migration during neural retina regeneration using thymidine- 



H3. Notophthalmus viridescens, Ambystoma mexicanum (Urodela) 

 c Ultrastructural changes during lens regeneration from the dorsal iris with special emphasis on the 



relation of the basal lamina to the lens capsule. Same species as a 

 REYNOLDS, S. R. M.; Ph.D., D.Sc, Prof. (Emer. Univ. of Illinois) - 933 Olde Hickory Rd., 



LANCASTER, Pa. 17601, U.S.A. 

 REYNOLDS (KING), Mrs. W. A.; Ph.D., Assoc. Prof. - Dept. of Anat., Univ. of Illinois, P.O. Box 



71 



