b Changes in activity of extracellular enzymes during development, particularly oxidases and 



cellulases. Same species as a 

 WOOLLAM, D. H. M.; M.D., Sc.D., F.R.C.P. - Anat. School, Univ. of Cambridge, Downing St., 



CAMBRIDGE CB2 3DY, England 

 a Mechanics and treatment of hydrocephalus. Oryctolagus cuniculus (Lagomorpha), Homo sapiens 



(Primates) 

 b Investigation on reasons for malfunction of Opitz-Halter valva. Same species as a 

 WOYKE, J.; Dr.habil., Prof. - Bee Div., Agric. Univ., 02-766 WARSZAWA 13, Ursynow, Poland 

 a Developmental genetics; sex determination and development of diploid drones. Apis mellifera 



(Hymenoptera) 

 b Development of reproductive organs and spermatogenesis of diploid drones (larval and pupal 



stage). Same species as a 

 c Polyploidization of tissues during development of haploid and diploid drones and of queens and 



workers. Same species as a 

 d Developmental genetics. Apis cerana (Hymenoptera) 

 e Comparative study of embryonic development and hatching. Apis florea, A. cerana indica, 



A. dorsata (Hymenoptera) 

 WRBA, H.; Dr.med., Dr.rer.nat., Prof. - Inst, fiir Krebsforsch., Univ. Wien, Borschkegasse 8a, Postfach 



72, 1090 WIEN, Austria 

 a Stoffwechsel in vitro. (Rodentia) 



b Eihautbildung, Differenzierung und Missbildung in vitro. (Rodentia) 

 c Heterotransplantation. (Rodentia) 

 d Diaplacentare Carcinogenese. (Rodentia) 

 WR6BLEWSKI, R.; Dr.med., Prof. - Dept. of Gen. Biol., Inst, of Biol, and Morphol., Silesian Acad. 



of Med., ul.K.Marksa 19, 41-808 ZABRZE, Poland 

 a Regeneration of transplantated thyroid gland, especially role of C-cells. Cavia porcellus 



(Rodentia) 

 WUHRMANN, P.; Dr.chem. - Inst, of Cell Biol., Swiss Fed. Inst, of Technol., Honggerberg, 8093 



ZURICH, Switzerland 

 a Ion determination. (Chironomidae, Diptera) 

 WURSTER, B.; Dr.rer.nat. - Abt. Zellbiol., Biozentrum der Univ., Klingelbergstr. 70, 4056 BASEL, 



Switzerland 

 a Stimulation of cell development by chemical signals; chemotaxis, oscillations. Dictyostelium 



discoideum, Polysphondylium violaceum (Acrasiales) 

 WYLIE, C. C; Ph.D. - Dept. of Struct. Biol., St. George Hosp. Med. Sch. Blackshaw Rd., Tooting, 



LONDON SW17 OQT, England 

 a RNA and DNA metabolism during oogenesis and in early embryos. Gallus domesticus (Aves) 

 b Differentiation of primordial germ cells. Xenopus laevis (Anura) 

 c Genes for rRNA in oocyte and embryo. Same species as a 

 WYSS, Ch.: Ph.D. - Inst, of CeU Biol., Swiss Fed. Inst, of Technol., Honggerberg, 8093 ZURICH, 



Switzerland 

 a Somatic cell genetics. Drosophila spec. (Diptera) 

 WYSS, U. R.; Dr. - Inst, fiir Pflanzenkrankh. und Pflanzenschutz, Techn. Univ., Herrenhauser Str. 2, 



3 HANNOVER-Herrenhausen, B.R.D. (Germany) 

 a Film analysis of embryonic development, especially cleavage pattern and hatching behaviour. 



Trichodorus similis, Longidorus elongatus (Nematoda) 

 YACOB, A. Y.; M.Sc. - Unit DevL BioL, Dept. of Zool., Univ. Coll., Belfield, Stillorgan Rd., DUBLIN 



4, Ireland 

 a Development of the pseudobranch (electron microscopy, histochemistry). Poecilia reticulata 



(Teleostei) 

 YAMADA, T.; D.Sc, Prof. - Unite de BioL du Devel., Inst. Suisse de Rech. Exp. sur le Cancer, 



ch.Boveresses, 1066 EPALINGES, Switzerland 

 a Factors controlling dedifferentiation and redifferentiation of cultured iris epithelial cells, studied 



by cell injection combined with immunofluorescence for gamma crystallin. Notophthalmus 



viridescens (Urodela) (with S. P. MODAK) 

 b Ultrastructural cytochemistry of cell surface alterations associated with dedifferentiation and 



redifferentiation of iris epithelial cells. Same species as a 

 c Cell cycle in conversion of iris epithelium cell type in culture. Same species as a 

 d Control of cell type by micro-injection of non-histone nuclear proteins into dedifferentiated iris 



epithelial cells in culture. Same species as a 

 YOUNG, B. A.; M.D., Ph.D. - Dept. of Anat., Med. BioL Ctr., Queen's Univ., BELFAST BT9 7BL, 



N.Ireland, U.K. 

 a Electron microscopy of developing thyroid and pituitary. Cervus spec. (Artiodactyla), Cavia 



porcellus (Rodentia), Oryctolagus cuniculus (Lagomorpha) 

 b Organ culture of the pituitary. Rattus spec. (Rodentia), Oryctolagus cuniculus (Lagomorpha) 

 ZAAYER, Ms. J. J. P.; Ph.D. - Lab. for Cell Biol, and HistoL, State Univ., c/o Acad. Hosp., 



Rijnsburgerweg 10, LEIDEN, Netherlands 

 a Hormonal activity of fetal gonads and adrenal glands with regard to the development of the 



reproductive tract (organ culture). Cavia porcellus (Rodentia), Homo sapiens (Primates) 

 ZABORSKI, P. - Lab. d'Embryol. Exp., Ctr. de Rech. du CNRS, 67 rue Maurice Gunsbourg, 94200 



IVRY sur SEINE, France 

 a Cytogenetique et immunologic de la differenciation sexuelle des gonades. Pelodytes punctatus 



(Anura), Pleurodeles waltl (Urodela) 



111 



