NUSS, Mrs. E.; Dr.rer.nat. - Zool. Inst. (I) der Univ., Rontgenring 10, 87 WURZBURG, B.R.D. 



(Germany) 

 a Time lapse microcinematography of ooplasm flows during early embryogenesis in connection 



with alterations of egg architecture. Pimpla turionellae (Hymenoptera) 

 b Ooplasm flows in centrifugated and in ligated eggs. Same species as a 

 NUSSLEIN, Mrs. Ch.; Ph.D. - Abt. Zellbiol., Biozentrum der Univ., Klingelbergstr. 70, 4056 BASEL, 



Switzerland 

 a Isolation and characterization of maternal effect mutants in the second chromosome. Drosophila 



melanogaster (Diptera) 

 NYIRI, S.; M.D. ^ Dept. of Anat., Univ. Med. School, Kossuth L.40, SZEGED, Hungary 

 a Developmental histochemistry and electron microscopy of the autonomic ground plexus. Rattus 



rattus (Rodentia) (with B. CSILLIK, E. KNYIHAR, M. GAJC and G. KALMAN) 

 ODEIGAH, P.C.G. - Inst, of Anim. Genet., Univ. of Edinburgh, West Mains Rd., EDINBURGH 



EH9 3JN, Scotland, U.K. 

 a Ultrastructure, immunology, and cell properties of lenses with normal and genetically modified 



cell membranes. Gallus domesticus (Aves), Mus musculus (Rodentia) (with R. M. CLAYTON, 



M. M. PERRY, and D. J. PRITCHARD) 

 O'DELL, D. S.; Ph.D. Dept. of Zool. and Comp. Anat., Univ. Coll. London, Gower St., LONDON 



WC1E6BT, England 

 a Biochemistry of the transitions between the amoeboid and the flagellate stages. Naegleria gruberi 



(Rhizopoda) 

 b Cell surface membranes: changes after fertilization and during early development. Paracentrotus 



lividus (Echinoidea); various spp. (Ascidiacea) 

 c Developmental biology. Various spp. (Mesozoa) 

 OGORZAiEK, A.: Ph.D. Inst, of Zool., Univ. of Wroclaw, ul.Sienkiewicza 21, 50-335 WROCtAW, 



Poland 

 a Oogenesis (autoradiography). Drosophila melanogaster (Diptera) 



b Cytochemistry of oogenesis. Nepa cinerea, Ranatra linearis, Naucoris cimicoides (Heteroptera) 

 OJEDA SAHAGUN, J. L.; Dr. Med., Prof. - Serv. de Embriol. E.xper., Dept. de Anat., Fac. de Med., 



SANTANDER, Spain 

 a Biochemical and ultrastructural effects of barbituric compounds on the embryo. Gallus 



domesticus (Aves) 

 b Cell death in the developing central nervous system (stages 7-20 H. H.; electron and optic 



microscopy). Gallus domesticus (Aves) 

 OKKER-REITSMA, Mrs. G. H.; Drs. - Lab. for Cell Biol, and Histol., State Univ., Rijnsburgerweg 10, 



LEIDEN. Netherlands 

 a Steroid production of placenta and embryo of different ages (radioisotopes, chromatography, 



bioindicator test for androgens, histochemistry). Mus musculus (Rodentia) 

 OKSCHE, A.; Dr.med., Prof. - Anat. Inst, der Univ., Friedrichst. 24, 63 GlESSEN, B.R.D. (Germany) 

 a Development of neuroendocrine cell complexes (units) in the hypothalamus (neurohistology, 



electron microscopy, cytometry). (Aves, Mammalia) 

 b Development of photo-ncuro-endocrine systems: retino-hypothalamic connections; deep 



hypothalamic photoreceptor; pineal photoreceptor organs. (Vertebrata) 

 OLIVEREAU, Miss M. M. A.; D.Sc. - Lab. de Physiol., Inst. Oceanographique, 195 rue Saint-Jacques, 



75005 PARIS, France 

 a Cytology and histochemistry of endocrine glands in relation with development, and after various 



experimental procedures. (Salmonidae, Teleostei) 

 b Pituitary grafting. Anguilla anguilla (Telecstei) 

 c Histophysiology of endocrine glands. Same species as b 

 d Histophysiology of the pituitary gland in immature and mature animals, in correlation with 



osmoregulatory processes. Mugil auratus (Teleostei) 

 OLIVO, O. M.; Prof. - 1st. di Anat. Umana Norm., Univ. di Bologna, Via Irnerio 48, BOLOGNA, Italy 

 OPAS, Mrs. J.; M.Sc. - Dept. of Embrvol., Zool. Inst., Univ. of Warsaw, Krakowskie Przedmies'cie 



26/28, WARSZAWA 64, Poland 

 a Hybridization of fcrtihzed and artificially activated eggs with follicle cells; possibility of their 



development in vitro and in vivo. Mus musculus (Rodentia) 

 b Determination of the minimal cytoplasmic volume large enough to permit cell division, by 



removing cytoplasm from eggs by osmotic shock or microsurgery. Same species as a 

 ORLOVA Mrs I. I.; Cand.biol.sci. - Lab. of Embryol., Inst, of Human Morphol., Acad, of Med. Sci. 



of the USSR, Tsurupa St.3, MOSCOW 1 17469, U.S.S.R. 

 a Correlation between cell death and cell division in lung, liver, and brain during embryogenesis. 



Rattus norvegicus (Rodentia) 

 b Humoral interconnections between analogous organs (lung, brain) of mother and foetus. Same 



species as a 

 ORTOLANl, Miss G.; D.Sc, Prof. - ZooL Inst., Univ. of Palermo, Via Archirafi 18, 90123 



PALERMO, Italy 

 a Interspecific transplantation of nuclei into eggs. (Amphibia) 

 b Hybridization, especially androgenetic hybrids. (Ascidiacea) 

 c Treatment of animal quartets by trypsin and RNA. Ascidia malaca (Ascidiacea) 

 d Hybrid fertilization after aging of the egg. Same species as c 



ORTS LLORCA, F.; Prof. - Dept. of Anat., Fac. de Med., Ciudad Univ., MADRID, Spain 

 OSBORN, J. C; M.Sc. - Dept. of Zool., Univ. of Liverpool, Brownlow St., P.O.Box 147, 



LIVERPOOL L69 3BX, England 

 a Biochemistry and morphology of abnormal and normal early development (Uthium, RNA 



77 



