in vitro, especially freezing and thawing and the effects of seminal plasma constituents; sperm 

 survival in different regions of the female reproductive tract and the ageing of gametes in vivo; 

 variations in fertility among males; capacitation of spermatozoa and fertilization in vitro. Sus 

 scrofa domesticus (Artiodactyla) 



b Methods for collection and transplantation of embryos; factors affecting the viability of embryos 

 and the establishment of pregnancy following egg transfer; culture, storage and deep-freezing of 

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

 vitro; basic studies on early embryonic development. Same species as a 



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

 RNA synthesis, energy requirements and structural reorganization; intrafollicular mechanisms 

 controlling maturation, including effects of gonadotrophins, steroids and intrafolUcular inhibitors; 

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

 sequent fertilization and early embryonic development; micromanipulation of oocytes and 

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

 dactyla) 



POLL, N. E. van de; Dr. - Netherl. Inst, for Brain Res., IJdijk 28, 1095 KJ AMSTERDAM, Netherlands 



a Development and correctibility of behaviour. Rattus norvegicus (Rodentia) 



b Influences of gonadal hormones on the development of the neural substrate underlying sexual 

 behavior and aggression. Same species as a 



POLTEVA, Ms. D. G.; Cand.biol.sci. - Dept. of Embryol., Leningrad State Univ., Mendeleevsky St. 5, 

 LENINGRAD 199164, USSR 



a Differentiation of interstitial cells in ontogenesis. Obelia lovenii, Coryne lovenii (Hydrozoa) 



b Oogenesis. Same species as a 



PORCELLI, Ms. P.; Ph.D., Prof. - Inst, of Dom. Anim. Anat., Univ. of Milano, Via Celoria 10, 20100 

 MILANO, Italy 



POSINOVEC, Ms. J.; M.D., D.Sc, Prof. - Inst, of Histol. and Embryol., Fac. of Med., Univ. of Zagreb, 

 Salata 3, P.O.Box 166, 41001 ZAGREB, Yugoslavia 



a Anomalies of spermatogenesis due to disorders in testis development. Homo sapiens (Primates) 



POURTOIS, M.; M.D., Prof. - Inst, de Stomatol., Univ. Libre de Bruxelles, 322 rue Haute, 1000 

 BRUXELLES, Belgium 



PRADA ELENA, F. - Lab. of Exp. Embryol., Dept.of Anat., Fac.of Med.,Univ. of Sevilla, SEVILLA, 

 Spain 



a Histogenesis of the retina: typology of horizontal cells. Gallus gallus (Aves) 



PRAT, Ms. M. ; Ph.D. -Dept. of Human Anat., Univ. of Torino, Corso M.d'Azeglio 52, 10126 TORINO, 

 Italy 



a Cell membrane differentiation; immunochemistry of surface macromolecules. Mus musculus (Ro- 

 dentia) 



b Membrane-mediated growth control in BHK cells. Mesocricetus auratus (Rodentia) 



PRATT, C. W. McE.;M.D. - Anat. School, Univ. of Cambridge, Downing St., CAMBRIDGE CB2 3DY, 

 England 



a Development of skeletal tissue. Many spp. (Mammalia) 



PREDA, V. G.; M.D., Prof. - Chaire de Biol.-Histol., Inst, de Med. et Pharm., Fac. de Med., Str. 

 Republicii No. 48, 3400 CLUJ-Napoca, Rumania 



a Influence de la temperature d'incubation sur I'immunomorphologie de I'embryon. Gallus spec. 

 (Aves) 



b Correlation entre le foie en regeneration et autres organes (surrenale, testicule). Rattus spec. 

 (Rodentia) 



PRELIPCEANU, Ms. 0.;ing. - Lab. of Embryol., Ctr. of Hyg. and Publ. Health, Bv. Mihai Viteazul 24, 

 1900 TIMI$OARA, Rumania 



a Dynamics of cyclophosphamide action. Gallus domesticus (Aves), Rattus norvegicus (Rodentia) 



b Detection of necrosis and macrophage reaction with vital fluorochrome. Same species as a 



c Teratogenesis. Homo sapiens (Primates) 



PRESLEY, R.; M.B., B.Chir. - Dept. of Anat., Univ. Coll., P.O.Box 78, CARDIFF CFl IXL, Wales, 

 UK 



a Development of cranial structures: comparative correlation between embryology and palaeontol- 

 ogy. (Vertebrata) 



pRESLICKOVA, Ms. M. - Inst, of Pharmacol., Czech. Acad, of Sci., Albertov 4, 128 00 PRAHA 2, 

 Czechoslovakia 



a Technique of the morphological examination of implantation and placentation. Homo sapiens 

 (Primates), (Rodentia) 



PRESTIGE, M. C; Ph.D. - Physiol. Dept., Med. School, Univ. of Edinburgh, Teviot Place, 

 EDINBURGH EH8 9AG, Scotland, UK 



a Synapse counting in optic tecta in normal and experimental conditions. Xenopus spec. (Anura) 



b Development of neuromuscular connections (electron microscopy, pharmacology). Same species 

 as a, and Gallus domesticus (Aves) 



PRESTON, T. M.; B.Sc. - Dept. of Zool. and Comp. Anat., Univ. Coll. London, Gower St., LONDON 

 WC1E6BT, England 



a Morphogenesis. Naegleria gruberi (Rhizopoda) 



PREtOVA, Ms. A.; RNDr., CSc. - Inst, of Exper. Biol, and Ecol., Slovak. Acad, of Sci., Dubravska c. 

 26, 88534 BRATISLAVA, Czechoslovakia 



a Function of green pigments in young embryos. linum usitatissimum (Linaceae) 



b Embryogenesis in vitro and effect of growth substances and other factors on embryogenesis in 

 vitro. Same species as a 



c Cultivation of heart stage embryos in vitro. Same species as a 



91 



