a Morpliogenetic forces controlling germ-layer migrations during gastrulation. Rana pipiens (Anura) 



b Biophysics of early limb bud formation. Chicken 



PIATK;0RSKY J : Ph D. - Lab. of Molec. Genet., Natl. Inst, of Child Health and Human Developm., 



Natl. Inst, of Health, Bldg. 6, Rm333, BETHESDA, MD 20014, USA 

 PIDDINGTON, R. L.; Ph.D. - Dept. of Histol. and Embryol., Sch. of Dent. Med., Univ. of 



Pennsylvania, PHILADELPHIA, PA 19174. USA 

 a Correlation of glutamyl transferase development with specific structural, biochemical, and 



physiological events during functional maturation of embryonic brain. Chicken 

 b Mechanisms of action of corticosteroids and other teratogens in inducing cleft palate in vitro. 



Mouse 

 Pll-NKOWSKI, M. M.: M.D., Ph.D. - Dept. of Anat., Michigan State Univ., A519 East Fee Hall, 



EAST LANSING, MI 48824, USA 

 PIERRO, L. J.; Ph.D., Prof. - Dept. of Anim. Genet., Storrs Agric. Exper. Station, Univ. of Connecti- 

 cut, STORRS, CT 06268, USA 

 a Teratogenic effects of cadmium and glycoalkaloids. Chicken, Mouse 

 b Abnormal eye development: corneal opacity, microphthalmia, cataracts. Mouse 

 c Developmental genetics of skeletomuscular system. Chicken 

 PIKO L.: Ing.Agr., D.V.M. Devi. Biol. Lab., Vets. Administr. Hosp., SEPULVEDA, CA 91343, USA 



also: Div. of Biol., Calif. Inst, of Technol., PASADENA, CA 91 125, USA 

 PILAR, G. R.; M.D., Prof. - Physiol. Sect., Biol. Sci. Group, Univ. of Connecticut, STORRS, CT 



06268, USA 

 PILKINGTON, J. B.; Ph.D. - Dept. of Zool., Univ. of Otago, Box 56, DUNEDIN, New Zealand 

 a Larval Ufe, development and metamorphosis part, polyploid (giant) nerve cells. Amphibola 



coenata (Pulmonata, Gastropoda) 

 PIPA, R. L.; Ph.D., Prof. - Div. of Entomol., Univ. of California, BERKELEY, CA 94720, USA 

 PIPERBERG, J. B.; Ph.D. - Dept. of Retina Res., Eye Res. Inst, of Retina Found., 20 Staniford 



St., BOSTON, MA 02114, USA 

 PITOT, H. C; M.D., Ph.D. - McArdle Lab. for Cane. Res., Univ. of Wisconsin, 450 N. Randall Ave., 



MADISON, WI 53706, USA 

 a RNA template stabilisation in differentiation and neoplasia. (Eukaryotes) 

 PIZZARELLO, D. J.; Ph.D., Prof. - Dept. of Radiol., Med. Ctr., New York Univ., 550 First Ave., 



NEW YORK, NY 10016, USA 

 POCCIA, D. L.; Ph.D. - Dept. of Biol., Amherst CoU., AMHERST, MA 01002, USA 

 a Interrelationships of female pronuclear chromosome cycle (turned on with NH3-buffers) and 



male pronuclear chromosome cycle (turned on by fertilization), and receptivitity of these nuclei 



to mitotic signals. Strongylocentrotus purpuratus, Lytechinus pictus (Echinoidea) 

 b Factors present in centriole containing fractions from sea urchin inducing mitotic spindles and 



parthenogenesis in Xenopus. Lytechinus pictus (Echinoidea), Xenopus laevis (Anura) 

 POIRIER, G. R.; Ph.D. - Dept. of Biol.. Univ. of Alabama, Univ. Stat., BIRMINGHAM, AL 35294, 



USA 

 a Role of proteinase inhibitors from the male reproductive tract in fertilisation. Mouse 

 POLLACK, E. D.: Ph.D. - Inst, for the Study of Devi. Disabilities, Univ. of Illinois and Illinois Inst. 



for Devi. Disabilities, 1640 W. Roosevelt Rd., CHICAGO, IL 60608, USA 

 a Morphogenetic interactions between tissues of the spinal reflex arc as they relate to the 



elongation, branching and direction of growing nerve fibers studied in tissue culture of spinal 



cord, sensory ganglia and limb tissue. Rana pipiens (Anura) 

 b Effect of thyroid hormones studied on cell size and number of lateral motor column and on 



mitotic activity in the spinal cord ventricular zone of hypophysectomised larvae. Same species 



as a 

 c Effect of limbs transplanted between diploid and triploid larvae on the formation of the lateral 



motor columns is being studied to determine types of alterations in neuronal parameters as a 



compensatory response to changes in genetic complement as they affect center-periphery 



interactions. Same species as a 

 d Target tissue control of neuronal cell death in the developing lateral motor column of larval 



spinal cord. Species as a 

 POLLARD, D. R.; Ph.D. - HeaUh Prot. Branch, Heahh and Welfare Canada, Rm 12A L.C.D.C, 



Tunney's Pasture, OTTAWA, Ont. Kl A 0L2, Canada 

 a Expression of embryonic-lethal genotypes in the allophenic animal. Mouse 

 b Effect of nucleic acid and protein inhibitors on cleavage stage embryos in vitro. Mouse 

 POLLOCK, Ms. C; M.Sc. - Dept. of Zool., Univ. of Brit. Columbia, VANCOUVER, B.C. V6T 1W5, 



Canada 

 a Food vacuole formation; membrane subunit cycling; fatty acid composition of membranes; 



effect of temperature on membrane composition; developmental genetics. Paramecium aurelia 



(CUiata) 

 POOL, T. B.; Ph.D. - Dept. of Anat., Health Sci. Ctr., Univ. of Texas, 7703 Floyd Curl Drive, SAN 



ANTONIO, TX 78284, USA 

 a Role of intracellular water and elements (Na, K, CI, Mg, etc.) in the regulation of cell 



proliferation in early development (X-ray microanalysis of frozen tissues). (Amphibia), Chicken 

 POOLE, T. J.; Ph.D. - Dept. of Surg., Harvard Med. School, Children's Hosp. Med. Ctr., 300 



Longwood Ave., BOSTON, MA 021 15 , USA 

 a Segregation and directed migration of the pronephric duct. Xenopus laevis (Anura), Ambystoma 



mexicanum, A. maculatum (Urodela), Chicken 

 b Role of adhesion in mesoderm pattern formation incl. somitogenesis. Ambystoma mexicanum 



(Urodela) 



68 



