a Spermiogenesis. Dugesia lugubris (Turbellaria) 



b Histochemistry of vitelline cells. Same species as a 



VAHERl, A. - Lab. of Exp. Embryol., III. Dept. of Pathol., Univ. of Helsinki, Haartmaninkatu 3, 



00290 HELSINKI 29, Finland 

 a Cell surface antigen localization in differentiation and malignancy of embryonic fibroblasts. 



Gallus domesticus (Aves) (with J. J. WARTIOVAARA and E. RUOSLAHTI) 

 VAHS, W.; Dr.phiL, Prof. ZooL Inst, der Univ., Weyertal 119, 5 KOLN 41, B.R.D. (Germany) 

 a Quantitative cytochemistry of nucleic acids and proteins during induction and differentiation. 



Triturus vulgaris (Urodela) 

 b Phase specific gene activities in the eyecup-lens-system of the developing embryo, as revealed by 



quantitative cytochemical DNA determinations. Salmo irideus (Teleostei), Triturus vulgaris 



(Urodela) 

 c Ultrastructure of embryonic cells undergoing induction and differentiation. Same species as a 

 VAKAET, L. C. A.; M.D., Prof. - Lab. of Anat. and Embryol., State Univ. Center, Groenenborgerlaan 



171, 2020 ANTWERPEN, Belgium 

 a Early development. Gallus domesticus, Coturnix japonica (Aves) 

 b Fetal and neonatal endocrinology. Mus musculus albinus (Rodentia) 

 c In vitro culture of blastoderms, normal and after experimental interventions; histochemistry: 



enzymes and mucopolysaccharides. Coturnix japonica, Gallus domesticus (Aves) 

 d Autoradiography of oogenesis. Mus musculus (Rodentia) 

 VAKHRUSHEVA, Mrs. M. P.; Dr. Inst, of Med. Genet., Kashirskoye Chaussee 6a, MOSCOW 



115478, U.S.S.R. 

 a Genetic regulation of development of brain, eye, and limbs. Mus musculus (Rodentia) 

 VALK, P. van^der; Drs. - Lab. of Bot., State Univ., Kerklaan 30, P.O. Box 14, HAREN (Gr.), 



Netherlands 

 a LUtrastructure and biochemistry of cell wall regeneration using protoplasts. Schizophyllum 



commune (Basidiomycetes, Fungi) 

 VALKEMA-PORRENGA, Mrs. F. C; Drs. - Lab. for Cell Biol, and HistoL, State Univ., Rijnsburger- 



weg 10, LEIDEN, Netherlands 

 a Development of bone and onset of mineralization in radii of 14-day embryos (electron 



microscopy). Mus musculus (Rodentia) 

 VAN DEUSEN, E. B.; Ph.D. - Biozentrum der Univ. Basel, Abt. ZellbioL, Klingelbergst. 70, 4056 



BASEL, Switzerland 

 VAN GANSEN, Mrs. P.; Prof. Dept. of Molec. Biol., Free Univ. of Brussels, 67 rue des Chevaux, 



1640 RHODE-ST-GENfeSE, Belgium 

 a Previtellogcnic and vitellogcnic oocytes: 1. RNA synthesis and nucleolar activity; 2. effect of 



actinomycin D and a-anianitin on nucleolar ultrastructure and RNA metabolism (electron 



microscopy, light and high resolution autoradiography, in situ molecular hybridization). Xenopus 



laevis (Anura) 

 b Effect of rifamycin SV and arabinofuranosylcytosine on rDNA synthesis and nucleolar structures 



in young oocytes (electron microscopy, light and high resolution autoradiography). Same species 



as a 

 c Nucleolar protein synthesis in previtellogenic oocytes (high resolution autoradiography). Same 



species as a 

 VANNINI, E.; Dr., Prof. - Inst, of Zool., Fac. of Sci., Univ. of Bologna, Via S.Giacomo 9, 40126 



BOLOGNA, Italy 

 a Experimental analysis of the development of the gonad and Bidder's organ. Buto spec. (Anura) 

 b Inhibition by antibiotics of testosterone-induced sex-reversal in tadpoles. Rana dalmatina (Anura) 

 c General study of the problem of the "sex gradient" in various hermaphroditic animals. 



(Hydroidea; Tricladidea, Turbellaria; Serpulidae, Polychaeta) 

 VAN PRAET, M. - Lab. de Biol, des Invert. Marins et Malacol., Museum Natl. d'Hist. Nat., 57 rue 



Cuvier, 75005 PARIS, France 

 a Experimental morplioaenesis and regeneration. Actinia equina (Actinozoa) 

 VARGA, A.; Dr., Ir. - Dept. of Plant PhysioL, Agric. Univ., Arboretumlaan 4, WAGENINGEN, 



Netherlands 

 a Development and ripening of fruits in vivo and in vitro, especially function of seeds. 



Lycopersicum esculentum (Solanaceae) 

 VASSE, J.; Lic.es Sci. - Serv. d'EmbryoL Exper., Inst. Pasteur, 20 rue des Moulins, 95110 SANNOIS, 



France 

 VASSETZKY, S. G.; Cand.bioLsci. - Inst, of Devclopm. Biol., Acad, of Sci. of the U.S.S.R., Vavilov 



St. 26, MOSCOW 117334, U.S.S.R. 

 VEGT, G. B.; Drs. - Lab. for Cell BioL and Histol., State Univ., Rijnsburgerweg 10, LEIDEN, 



Netherlands 

 a Cultivation of embryonic intestinal tissue. Rattus spec. (Rodentia) 

 VEINI(Haritos), Mrs. M.;M.Sc. - Zool. Lab., Univ. of Athens, Panepistimiopohs (Kouponia), ATHENS 



(621), Greece 

 VERBICKY, M. Sh.; Cand.med.sci. - Inst, of Human Morphol., Acad, of Med. Sci. of the USSR, 



Tsurupa St. 3, MOSCOW 1 17469, U.S.S.R. 

 a Immunological relationships between mother and foetus. Rattus norvegicus (Rodentia), Papio 



hamadryas, Macaca mulatta. Homo sapiens (Primates) 

 b Humoral interactions between analogous organs (reticulo-endothelial and leucopoietic system) ot 



mother and foetus. Rattus norvegicus (Rodentia), Macaca mulatta (Primates) 

 c Cell and humoral immunity and infertility. Rattus norvegicus (Rodentia), Homo sapiens 

 (Primates) 



103 



