a Hemopoietic function of the foetal liver; factors controlling its progressive disappearance. Rattus 



norvegicus (Rodentia) (with J. NAGEL, C. BILLAT and R. L. JACQUOT) 

 NAGL.W.; Dr., Prof. - Div. of Cell Biol., Dept. of Biol., Univ., P.O.Box 3049, 6750 KAISERS- 



LAUTERN, B.R.D. (Germany) 

 a Ultrastructural differentiation, and synthesis of DNA and RNA in the development of the oocyte 



and the ovarian nutritive tissue. Gerris najas (Heteroptera) 

 b Autolysis of the embryonal suspensor (ultrastructure, cytochemistry). Phaseolus coccineus (Papi- 



Uonaceae), Tropaeolum majus (Tropaeolaceae) 

 NAMUR, Ms, P.; D.E.A. - Lab. d'Embryol., Dept. de Biol.-Ecol., U.E.R. de Sci., Univ. de Caen, 



14032 CAEN, France 

 a Etude experimentale de Taction d'antimetabolite au cours du developpement precoce du germe. 



Ambystoma mexicanum (Urodela) 

 NANDAKUMARAN, M.; M.Sc. - Lab. de Biol, de la Reprod., Univ. Paris VI (P. et M. Curie), Bat.A, 



7e etage, 7 quai Saint-Bernard, 75230 PARIS Cedex 05, France 

 a Placental transfer of betamimetics (in vitro perfusion). Homo sapiens (Primates) 

 NARDI, Ms. I.; Dr.Biol. - Inst, of Histol. and Embryol., Univ. of Pisa, Via A.Volta 4, 56100 PISA, 



Italy 

 a Mitotic and lampbrush chromosomes; DNA analysis and in situ RNA/DNA hybridization 



(Urodela) 

 NARDI VILARDAGA, J. - Dept. of Anat., Univ. of Barcelona, C/.Casanova 143, BARCELONA 11, 



Spain 

 a Influence of extrinsic factors on joint development. (Aves) 



b Interaction between membranous and cartilaginous developing bones in vivo and in vitro. (Aves) 

 NAVARATNAM,V.; Ph.D. - Anat. School, Univ. of Cambridge, Downing St., CAMBRIDGE CB2 



3DY, England 

 a Ontogenesis of cholinesterase and mono-amine activity in cardiac innervation. (Mammaha). 



Homo sapiens (Primates) 

 b Differentiation of sympathetic ganglia. Rattus spec. (Rodentia) 



NAYLOR, E.; Ph.D., Prof. - Dept. of Marine Biol., Univ. of Liverpool, PORT ERIN, Isle of Man, U.K. 

 a Developmental aspects of behaviour. Carcinus maenas, Callinectes sapidus, Macropipus spec. 



(Decapoda, Crustacea) 

 NEDVfDEK, J.; RNDr. - Dept. of Exp. Zool., Charles Univ., Vinicna 7, 12844 PRAHA 2, Czechoslo- 

 vakia 

 a Nucleic acids and subcellular particles in oogenesis and early development. (Amphibia) (with 



V. HABROVA) 

 b Transplantation of nuclei in relation to nucleic acids and proteins. (Amphibia) (with 



F. SLADEtEk and A. ROMANOVSKt) 

 NEEDHAM, A. E.; D.Sc. - Dept. of Zool., Univ. of Oxford, South Parks Rd., OXFORD 0X1 3PS, 



England 

 a Review of regeneration and general metabolism 

 NELEMANS, S. A.; Drs. - Hubrecht Lab. (Intern. Embryol. Inst.), Uppsalalaan 8, 3584 CT UTRECHT, 



Netherlands 

 a Regulation of the cell cycle and its significance for development and differentiation: the role of 



changes in membrane properties and structure, ion and cyclic nucleotide metabolism. Neuro- 

 blastoma ceUs, Mus musculus (Rodentia) (with J. G. BLUEMINK, S. W. de LAAT, P. T. van der 



SAAG and W. H. MOOLENAAR) 

 NELLEN, W.; DipI.Biol. - Inst, fur Allgem. Biol, der Univ., Universitatsstr. 1, 4000 DUSSELDORF, 



B.R.D. (Germany) 

 a Processing of genetic information; isolation of mRNA and in vitro translation systems. 



Drosophila hydei (Diptera) 

 b Specific changes in ribosomal subunits depending on the method of isolation. Same species as a 

 NELSON, L.; Fil.kand. - Dept. of Zoophysiol., Univ. of Umea, 901 87 UMEA, Sweden 

 a Mitochondrial differentiation during ontogenesis. Xenopus laevis (Anura) 

 NETZEL, H. E. M.; Dr. - Inst, fur Biol.lll, Univ., Auf der Morgenstelle 28, 7400 TUBINGEN, B.R.D. 



(Germany) 

 a Shell formation: secretion and morphogenesis. Arcella dentata, Centropyxis discoides, Difflugia 



oviformis (Rhizopoda) 

 b Cytomorphogenesis: division and regeneration of thecae; cyst formation. Gonyaulax polyedra, 



Peridinium cinctum (Dinophyceae) 

 NEUBERT, J.; Dr.rer.nat. - Inst, fiir Flugmedizin der DFVLR, Kolnerstr. 70, 53 BONN-Bad Godes- 



berg, B.R.D. (Germany) 

 a Effect of simulated weightlessness on ultrastructure of the embryonic vestibular organ. (Anura) 



(with W. BRIEGLEB) 

 b Teratogenic and genetic anomalies induced by simulated weightlessness (fast running clinostat). 



Tribolium confusum (Coleoptera) (with W. BRIEGLEB) 

 NEUMANN, D.; Dr.rer.nat., Prof. - Zool. Inst, der Univ.. Weyertal 119, 500 KOLN 41, B.R.D. 



(Germany) 

 a Timing of pupation and emergency by physiological clock mechanisms. Clunio marinus (Chirono- 



midae, Diptera) 

 b Growth and reproduction rate under the influence of photoperiod and daily fluctuations of 



temperature. Chaoborus vitripennis (Diptera), Daphnia longispina (Cladocera, Crustacea) 

 NEVILLE, P. A. J.; Dr.d'E'tat, Prof. - Lab. de Morphogen. Vegct., Univ. d'Aix-Marseille III, Fac. 



St.-Jerome, rue Henri Poincare, 13397 MARSEILLE Cedex 4, France 

 a Leaf morphogenesis: 1. regeneration; 2. growth. Gleditsia triacanthos (Leguminosae) 



76 



