a Development of the systems involved in the regulation of muscular contraction and cellular 



DRAGOMIROV, N. I.; Dr.biol., Prof. - A.N.Severtzov Inst, of Evol. Morphol. and Ecol. of Animals, 

 Acad, of Sc'i. of the USSR, Lenin Ave. 33, MOSCOW 117071, USSR 



DREWS U.;Dr.med.,Prof. - Anat. Inst. der Univ., Osterbergstr. 3,7400 TUBINGEN, BRD (Germany) 



a Expression of Tfm (testicular feminization) and Sxr (sex reversed) in the development of male 

 sex organs (epithelio-mesenchymal recombination). Mus musculus (Rodentia) 



b Cholinesterase activity in non-nervous embryonic tissues (histochemistry). Same species as a and 

 Gallus domesticus (Aves) ^ 



DROIN, Ms. A.; Dr.biol. - Stat, de Zool. Exp., Univ. de Geneve, 154 Rte de Malagnou, 1224 

 CHENE-BOUGERIES (Geneve), Switzerland 



a Search of mutations through genetic analysis of somatic nuclei; description of the mutant tad- 

 poles and analysis of their defects by histology and experimental embryological techniques. 

 Xenopus spec. (Anura) 



DROZDOV A L.; cand. biol.sci. - Lab. of Embryol., Inst, of Marine Biol., Far East Sci. Qr., USSR 

 Acad, of Sci., VLADIVOSTOK 690022, USSR 



a Mechanism of acrosomal reaction and cortical reaction, fate of mitochondrial patterns after 

 fertihzation. Crenomytilus grayanus (Bivalvia), Strongylocentrotus intermedius (Echinoidea), 

 Oncorhynchus horbusha (Salmonidae, Teleostei) 



b Biochemistry and ultrastructure of the cytoskeleton of gametes and embryonic cells. Strongylo- 

 centrotus intermedius (Echinoidea), Asterias amurensis (Asteroidea) 



DRUGA, Ms. A.; M.D. - Inst, for Drug Res., P.O.Box 82, 1325 BUDAPEST, Hungary 



a Teratogenetic effect of chemicals, especially drugs containing the piperazin ring. Rattus norve- 

 gicus (Rodentia) 



b Perphenazine induced micromelia Oiistology: topooptical reaction). Same species as a 



c Effect of phenobarbital and SKF 525-A pretreatment on teratogenicity of perphenazine, to 

 study whether unchanged perphenazine is teratogenic or not. Same species as a 



DRUGA, R,; MUDr. - Dept. of Anat., Charles Univ., U. nemocnice 3, 128 00 PRAHA 2, Czechoslova- 



a Prenatal morphological development of basal ganglia. Fehs domestica (Carnivora), Rattus norve- 



gicus (Rodentia), Oryctolagus cuniculus (Lagomorpha) 

 DRUKKER, J.; Ph.D., Prof. - Fac. of Med., State Univ. of Limburg, P.O. Box 616, 6200 MD 



MAASTRICHT, Netherlands 

 a Interaction between neurectoderm and target tissues. Gallus domesticus (Aves) 

 DUBENDORFER, A.; Ph.D. - Zool. Inst, der Univ. Zurich, Winterthurerstr. 190, 8057 ZURICH, 



Switzerland 

 a Embryogenesis and metamorphosis in vitro. Drosophila melanogaster (Diptera) 

 DUBOIS R.; Dr. - Inst. d'Embryol. du C.N.R.S. et du Coll. de France, 49bis av. de la Belle Gabrielle, 



94130 NOGENT-sur-MARNE, France 

 a Lignee germinale et morphogenese sexuelle. Gallus gallus (Aves) (avec D. CUMINGE) 

 b Biosynthese glycoproteique dans les ebauches gonadiques (topochimie, cmetique). Meme espece 



comme a 

 c Effets des lectines sur I'amiboidisme des cellules germinales. Meme espece comme a 

 d Aspects discontinus du renouvellement dans les systemes biologiques a cloisonnement anatomique 



complexe. Meme espece comme a 

 DUKE, E. J.; Ph.D. - Zool. Dept., Univ. Coll., Belfield, Stillorgan Rd., DUBLIN 4, Ireland 

 DUNCAN, C. J.; Ph.D., Prof. - Dept. of Zool., Univ. of Liverpool, Brownlow St., P.O.Box 147, 



LIVERPOOL L69 3BX, England 

 a Factors affecting early differentiation (ionophore, calcium, electron microscopy). Xenopus 



laevis (Anura) 

 DUNCKER, H. R.; Dr.rer.nat., Dr.med., Prof. - Zentrum fiir Anat. und Cytobiol., Justus Liebig Univ., 



Aulweg 123, 6300 GIESSEN, BRD (Germany) 

 a Embryological and post-hatching development of the lung-air sac system, especially the number 



and arrangement of secondary bronchi and parabronchi, and the parabronchial blood-air capillary 



network. Columba spec, Gallus spec, Anas spec, Melopsittacus spec, Turdus spec. Passer spec, 



Taeniopygia spec, and others (Aves) 

 b Embryological development of celomic cavities and subdividing septa in correlation to develop- 

 ment of the lung-air sac system and of the intestinal and urogenital tract. Gallus spec, Anas spec, 



Columba spec and others (Aves) 

 DUNN, G. A.; Ph.D. - Strangeways Res. Lab., Worts Causeway, CAMBRIDGE CBl 4RN, England 



no work on developmental biology in progress 

 DUPRAT (ESCUDlE), Ms. A. M.;D.Sc. - Lab.de Biol. Gen., Univ. Paul-Sabatier, 118 Rte deNarbonne, 



31077 TOULOUSE Cedex, France 

 a Determination and differentiation of cultured embryonic cells. (Urodela) 

 b Role of non-histone chromatin proteins. (Urodela) 

 c Hemoglobin switch (immunofluorescence; in vitro culture). (Urodela) (with P. DEPARIS and 



M. FLAVIN) 

 DUPUIS (CERTAIN), Ms. P. - Lab. de Biol. Anim., Univ. Paris VI (P.et M. Curie), 4 place Jussieu, 



75230 PARIS Cedex 05, France 

 a Histochemistry of steroid enzymes. Discoglossus spec. (Anura), Pleurodeles spec. (Urodela) 

 DURAND, J. P.; D.Sc - Lab. Souterrain du C.N.R.S., fiquipe de Biol. Souterraine, 09200 MOULIS, 



Saint-GLrons, France 

 a Reproduction and development of cave dwelling forms, 

 b Experiments on ontogenesis and eye degeneration 



35 



