a Regulatory mechanism of estrogen-dependent synthesis of vitellogenin. Xenopus laevis (Anura) 



(with R. WEBER, G. U. RYFFEL, R. JAGGI and B. FELBER) 

 WEYCHERT, K.; Mgr.biol. - Dept. of Zool., Inst, of Biol., Univ. of N. Copernicus, Gagaiina 9, 



87-100 TORUN, Poland 

 a Regeneration of appendages in normal and experimentally changed conditions. Tegenaria atrica 



WEYGOLDT.'P.; Dr., Prof. - Biol. Inst. I. (Zool.) der Univ., Alberstr. 21a, 78 FREIBURG, B.R.D. 



(Germajiy) 



no work on developmental biology in progress 

 WHITE, Ms. J.; M.A. - Dept. of Devi. Biol., Marischal Coll., Univ. of Aberdeen, ABERDEEN AB9 



IAS, Scotland, U.K. 

 a Divalent cation distribution in glucocorticoid treated cells (chloro tetracycline fluorescence, 



aequorin luminescence). GaUus gallus (Aves) 

 WHITE, R. - A.R.C. Inst, of Anim. Physiol., Anim. Res. Station, 307 Huntingdon Rd., CAMBRIDGE 



CB3 OJQ, England 

 a Mechanism of action of steroid hormones, at the molecular level, with respect to their control of 



specific gene expression in sex accessory tissues. (Mammalia) 

 WHITEAR, Ms. M.; Ph.D., D.Sc. - Dept. of Zool., Univ. Coll. London, Gower St., LONDON WCIE 



6BT, England 

 a Morphological and experimental study on origin and development of Merkel cells and chemo- 



sensory cells in larval epidermis. Many spp. (Anura & Urodela) (with H. FOX) 

 WHITTINGHAM, D. G.; Ph.D. - MRC Mammal. Devi. Unit, Univ. Coll. London, Wolfson House, 



4 Stephenson Way, LONDON NWl 2HE, England 

 WICK R. J., Dr.rer.nat. - Zool. Inst, der Univ., Lehrst.I: Morphol. und Entw.biol., Rontgenring 10, 



8700 W'URZBURG, B.R.D. (Germany) 

 a Characterisation of DNA replication during differentiation by means of density shift with bromo- 



deoxyuridine (BUdR) and radioactive labelling, in sporulating cultures. Physarum polycephalum 



(Mycetozoa) 

 WIDE, Ms. M.;Fil.mag. - Inst, of Zool., Uppsala Univ., Box 561, 751 22 UPPSALA, Sweden 

 a Disturbances of blastocyst implantation by lead chloride in vivo and in vitro. Mus musculus 



(Rodentia) 

 WEDMER, H.; lic.philjiat. - Div. of Cell and Devi. Biol., Zool. Inst., Univ. Bern, Sahlistr. 8, 3012 



BERN, Switzerland 

 a Hemoglobin transition in relation to metamorphosis. Xenopus laevis (Anura) (with R. WEBER) 

 WIERTZ-HOESSELS, Ms. E. L. M. J.; Dr. - 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) 

 WIGGLESWORTH, Sir V. B.; Dr., Prof. (Emer.) - Dept. of Zool., Univ. of Cambridge, Downing St., 



CAMBRIDGE CB2 3EJ, England 



no work on developmental biology in progress _ . ,„ r. .. i o -.coa r^u 



WIJK, R. van; Dr. - Dept. of Molec. Cell Biol., State Univ., Transitonum III, Padualaan 8, 3584 CH 



UTRECHT, Netherlands ^ ,, . , ,. . 



a Factors affecting growth rate and length of ceU cycle phases of normal hepatocytes and cultured 



hepatoma cells; role of cyclic nucleotides, enzymes and hormones (tmie lapse microcmematog- 



raphy, DNA photometry, autoradiography). Rattus spec. (Rodentia) 

 b Control of tyrosine aminotransferase synthesis in relation to differentiation of hepatocytes. bame 



WILCOX^ mTpVd. - M.R.C. Lab. of Molec. Biol., Hills Rd., CAMBRIDGE CB2 2QH, England 



a Imaginal disc development and regulation. Drosophila melanogaster (Diptera) 



WILD, A E.; Ph.D. - Dept. of Biol., Univ., Med. and Biol. Sci. Bldg., SOUTHAMPTON S09 3TU, 



England . , /, i, \ 



a Protein transmission across foetal membranes. Oryctolagus cuniculus (Lagomorpha) 



b Lens regeneration. Xenopus laevis (Anura) r r- ■ 



WILDE A G de- M D., Ph.D., Prof. - Dept. of Anat. and Embryol., State Univ. of Groningen, 

 Oostersingel 69, 9713 EZGRONINGEN, Netherlands 



a Development of computer programs for the reconstruction, by incremental plotter, ot embryonic 

 organ structure ^ .• ,. i 



b Morphogenesis of the palatal and nose regions, studied by means of reconstructions. Mus musculus, 

 Rattus norvegicus (Rodentia), Homo sapiens (Primates) ^^^ ,, ,- . d^ 



WILLADSEN, S. M. - A.R.C. Inst, of Anim. Physiol., Anim. Res. Station, 307 Huntingdon Kd., 

 CAMBRIDGE CB3 OJQ, England ,. <• u ,^ .„a 



a In vitro maturation and in vivo and in vitro fertihzation of oocytes; culture ot embryos and 

 preservation by deep freezing; development of a non-surgical method for recovery of embryos 

 and the investigation of factors affecting the survival of embryos after non-surgical transter; 

 factors affecting twinning by egg transfer. Bos taurus (Artiodactyla) 



b Methods for coUecting and transplantation of embryos; factors affectihg the viabihty ot embryos 

 and the estabUshment of pregnancy foUowing egg transfer; culture, storage and deep-treezing ot 

 embryos; manipulation of embryos in vitro and sex determination; maturation of oocytes m vitro; 

 basic studies on early embryonic development. Sus scrofa domesticus (Artiodactyla) 



c Subcellular changes during oocyte maturation including membrane transport, protein synthesis, 

 RNA synthesis energy requirements and structural reorganization; intrafollicular mechanisms 

 controUing maturation, including effects of gonadotrophins, steroids and intrafollicular inhibitors; 

 effects of biochemical manipulation, RNA and protein inhibition or steroid alterations on sub- 

 sequent fertihzation and early embryonic development; micromanipulation of oocytes and 

 embrvos; sex determination; culture, storage and deep-freezing of embryos. Ovis aries (Artiodactyla) 



118 



