[oo6 



SUBJECT INDEX 



necrotic tissues extract promoting 



wound-healing, 637 

 jXecturus larvae, 679 

 Xematoda, 590 

 Nemertinea, 590 

 neoblasts, 589 



neogenesis of methyl groups, 73 

 neoplasms, experimental — of the pituitary, 



824 



— following whole body irradiation, 848 



— , hormonal imbalance per se as factor 

 in inducing — , 829 



— of non-target tissues induced by 

 estrogen, 837 



— , spontaneous, 823 



— of tissues whose normal growth is 

 stimulated by estrogen, 835 



neoplastic growth, autonomous, 823 

 , conditional and hormone 



responsive , 825 



— , uptake of immunoproteins and serum 



proteins in — tissues, 497 

 neotomy, 588 

 nephelometry, 575 

 nephrotomes, 342, 352 

 nerve cell, cytological stages of functional 



activity, exhaustion and recovery of the 



, 964 



— supply and regeneration, 640 



■ — tissue, functional hypertrophy, 643 



neural crest, 404 



and derivatives, 454 



— field, 389 



— plate, 340 



— tube, 367 



• , effects of neighboring tissues on 



shape and differentiation, 406 

 tissue and somite mesoderm, 



interaction, 520 

 neuralization of ectoblast, autonomous, 



479 



— of mesoblastic material, direct, 398 



neurarcuals, 462 



neurectoblast, presumptive activated — of 



Urodele gastrula, 391 

 — , structure of — in normal Pleiirodeles 



embryo, 359 

 neuroblast, 319 

 neuro-epithelial, zones of intense — growth, 



407 

 neuro-epithelium, chordal islets in — , 413, 



477 

 — , explanted, 454 

 — , influence of neighboring tissue on 



differentiation of — , 405 

 neurogenic induction, 351 



neurogenic induction as main aspect of 



extrinsic morphochoresis, 357 

 neuron, constant production and using 



up of protein during functional activity 



of — , 964 

 neuro-organizin, 478 

 Neurospora, 2, 23, 63, 71, 76, 81, 98, 1 15 



— enzym catalizing transamination 

 between a-amino-adipic acid and 

 a-ketogluturate, 77 



— , hydrogen transport system, 23 

 — , lysine requiring mutants, 78 



— mutants accumulating protocatechuic 

 acid, 67 



neurotropic factor, 643 

 neurulation, 288, 319 

 N-excretion, size dependence, 203 

 a-N-formyl glycineamide ribotide, 908 

 N-formyl glycineamidine ribotide, 85 

 NiO-formyl-THFA, 119 

 N^-formyl-5,6,7,8-tetrahydropteroyl- 



glutamic acid (citrovorum factor), 943 

 NiO-hydroxymethyl-THFA, 10, 119 

 niacin, 5, 1 15 



nickel as cancer inductor, 869 

 Nicotiana tabacum, 759 

 nicotinamide, 36 



— as cell division promoting factor in 

 plants, 772 



nicotinic acid, conversion of tryptophane 



to — , 1 16 

 — , effect of — in regeneration, 630 



— synthesis, 1 15 



nidation stage in rat embryo, 364 

 nidiculous mammals, 250 

 nidifugous mammals, 250 

 Nitella, 749 



nitrate as a hydrogen acceptor, 22 

 — , capacity of plants and microorganisms 

 to reduce — and nitrite, 81 



— and nitrite as hydrogen acceptors, 23 



— reductase, 82 



system of microorganisms, 26 



— reduction, 22 

 nitrite reductase, 82 



— and hydroxylamine reductase in NH3 

 requiring Neurospora mutants, 82 



— , reduction of — to hydroxylamine, 23 

 nitrogen, amino acids necessary for — equi- 

 librium, 55 



— compounds, metabolism, 715 

 — , content of human tumors, 915 



— , fixation and transfer of inorganic — , 81 



— flow in regeneration, 633 



— metabolism in cleidoic eggs, 738 

 , cytological mechanism, 729 



