b Are the micromeres of the 16-cell stage embryos already determined to differentiate acetylcholi- 

 nesterase? Dendraster excentricus (Echinoidea) 



c Ontogeny of acetylcholine receptors. Same species as a 



d Chromatin protein structure and biochemistry of sperm and eggs, and their transformation 

 at fertilization. Strongylocentrotus purpuratus, Lytechinus pictus, Dendraster excentricus (Echi- 

 noidea) 



OZORAN, A.; Dr.med. - Dept. of Histol. and Embryo!., Med. Fac, Hacettepe Univ., ANKARA, 

 Turkey 



a Development and differentiation of the nucleus caudatus in fetus and neonate. Rattus norvegicus 

 (Rodentia) 



PACKARD, D. S., Jr.; Ph.D. - Dept. of Anal., Upstate Med. Ctr., State Univ. of New York, 766 Irving 

 Ave.. SYRACUSE, NY 13210, USA 



a. Determination and segmentation of Semitic mesoderm. Gallus domesticus (Aves) 



b Cellular site of action of nucleotide analog teratogens (bromodeoxyuridine, iododeoxyuridine). 

 Same species as a 



PADYKULA, Ms. H. A.; Ph.D., Prof. - Div. of Anim. Physiol., Ian Clunies Ross Anim. Res. Lab., 

 CSIRO, BLACKTOWN, N.S.W. Australia 



PAGANO, R. E.; Ph.D. - Dept. of Embryol., Carnegie Inst, of Washington, 115 W. University Park- 

 way ,'bALTIMORE, MD 21210, USA 



a Membrane lipid and cholesterol organization and their dynamics in the plasma membranes of 

 lymphocytes and fibroblasts. Mus musculus, Cricetulus griseus (Rodentia) 



PALLIE, W.; Ph.D., Prof. - Dept. of Anat., Fac. of Health Sci., McMaster Univ., HAMILTON, Ont. 

 L8S 4J9, Canada 



PANCHAMUKHI, B. G.; Pli.D. - Dept. of Anat., Gujarat Coll. of Vet. Sci. and Anmi. Husbandry, 

 ANAND 388001, Gujarat, India 



a Histogenesis (from primordium till birth) of the stomach, especially reticulum, omasum, gastric 

 glands. Bubalus bubalis (Artiodactyla) 



PANDEY, K. N.; M.Sc. - Dept. of Biochem., Fac. of Sci., Univ. of Allahabad, ALLAHABAD 21 1002, 

 India 



a Some enzymes (phosphatases, transaminases, trehalase and proteolytic) and metabolites (proteins, 

 amino acids, nucleic acids and carbohydrates) in the fat body during larval-pupal development 

 and spinning period. Antheraea mylitta (Lepidoptera) 



b Effect of ultraviolet radiation on development. Philosamia ricini (Lepidoptera) 



PANG Yan-bin; Prof. - Shanghai Pedag. Univ., SHANGHAI 200062, People's Rep. of China 



a Ultrastructure and cytochemistry of the macronuclear reorganization phenomenon during 

 asexual reproduction, and its relation to the physiological state. Stylonychia mytilus, Euplotes 

 curystomus (Ciliata) 



b Structural and functional relationship between macro-micronuclei, and theii changes during 

 asexual reproduction. Stentor coeruleus, S. polymorphus (Ciliata) 



c Relationship of cytoplasmic differentiation and regulation of physiological functions in dorsi- 

 conjugants. Stylonychia mytilus (Ciliata) 



d Experiments on nuclco-cytoplasmic relationship after cytoplasmic exchange between distantly 

 related species. Stentor coeruleus, Spirostomum ambiguum, Paramecium bursaria (Ciliata) 



e Ultrastructure and cytochemistry of macronuclear regulation in dorsi-conjugants. Same species 

 as c 



f Differentiation and dcdifferentiation of nuclear apparatus during encystment and excystment, 

 their relation with cytoplasmic changes (cytochemistry, ultrastructure). Same species as c 



g' Why and how the surplus macronuclei of daughter cells, produced by translocation of macronuclei 

 during asexual reproduction, lose their functions. Same species as c 



PANT (AIYAR), Ms. R.; Ph.D. - Dept. of Biochem., Fac. of Sci., Allahabad Univ., ALLAHABAD 

 211002, India 



a Lipid metabolism. Silk worms (Lepidoptera) 



b I'ree amino acids, transaminases, nucleoproteins, proteins, and proteolytic enzymes in the sUk 

 gland during development. Antheraea myhtta (Lepidoptera) (with S. D. SINGH) 



c Effect of photoperiod during development on several enzymes and metabolites. Same species as 

 b (with many coworkers) 



d Variation studies in several enzymes and metabohtes during development from embryo through 

 adult. Philosamia ricini, Attacus alata, Antheraea mylitta (Lepidoptera) (with many coworkers) 



e Development of silk glands during fifth instar. Same species as d 



f Effect of UV and X irradiation on larvae. Philosamia ricini (Lepidoptera) (with B. G. UNNI) 



g Nutrition studies. Same species as f (with S. K. GUPTA) 



PAPACONSTANTINOU, J.; Ph.D. - Biol. Div., Oak Ridge Natl. Lab., P.O. Box Y, OAK RIDGE, 

 TN 37830, USA 



PAPPANO, A. J.; Ph.D., Assoc. Prof. - Dept. of Pharmacol., Health Ctr., Univ. of Connecticut, 

 FARMINGTON, CT 06032, USA 



a Morphological development of autonomic heart innervation (fluorescent histochemical method 

 of I-'alck for identification of adrenergic nerves); ultrastructure of choHnergic and adrenergic 

 innervation of the sinoatrial pacemaker (transmission electron microscopy); functional devel- 

 opment of autonomic neuroeffcctor transmission (electrophysiologic and pharmacologic meth- 

 ods). GaUus domesticus (Aves) 



b Change in ion current responsible for excitation in the embryonic heart electrophysiology (inhib- 

 itors of ion current flow). Same species as a 



70 



