Iyeri-Joh 



a. Inductive effects of embryonic juice. Triturus pyrrhogaster (Urodela) , 

 Gallus domesticus (Aves) 



b. Fractionation of inductive agents from mammalian tissues (normal, re- 

 generating and cancer tissues). Triturus pyrrhogaster (Urodela), Rattus 

 spec, Cavia spec. (Rodentia) 



JACOB, J. M.A., Ph.D. — Inst, of Animal Genet., Univ. Dept. of Genet., 

 King's Buildings, West Mains Road, EDINBURGH 9, Scotland 



a. Electron microscopic studies of the salivary glands. Bradysia spec. 

 (Sciaridae, Diptera) , Smittia spec. (Chironomidae, Diptera) (in collabo- 

 ration with J. L. SIRLIN) 



b. Biochemical cytology of the salivary glands. Bradysia spec. (Sciaridae, 

 Diptera), Smittia spec. (Chironomidae, Diptera) (in collaboration with J. 

 L. SIRLIN) 



JACOBS, W. P. A.B., Ph.D. — Dept. of Biol., Princeton Univ., Box 704, 

 PRINCETON, N.J., U.S.A. 



a. Quantitative study of normal development including round-the-clock col- 

 lecting, morphological and histological studies; sterile culture and floral 

 induction of shoot apices. Coleus spec, Perilla spec, Caulerpa spec. 



b. Quantitative study of hormonal factors which normally control the differ- 

 entiation of the 2 cell-types, xylem and sieve-tubes. Coleus blumei 



JACOBSON, A. G. A.B., Ph.D. — Dept. of Zool., Univ. of Texas, AUS- 

 TIN 12, Texas, U.S.A. 



a. Induction of the lens of the eye by the synergistic action of neural and 

 non-neural inductors. Taricha torosa (Urodela) 



b. Tissue interactions between ectoderm and mesoderm and between endo- 

 derm and mesodern that affect heart differentiation. Taricha torosa 

 (Urodela) 



c Factors influencing the positioning of the placodal structures. Taricha 

 torosa (Urodela) 

 JACOBSON, D. C.-O. Fil.lic — Zool. Inst., Uppsala Univ., UPPSALA, 

 Sweden 

 a. Determination of the central nervous system. Ambystoma spec. (Urodela) 

 JAFFE, L. F. B.S., Ph.D. — Biol. Division, Univ. of Pennsylvania, PHILA- 

 DELPHIA 4, Pa., U.S.A. 



a. Development of cell polarity; studied by analyzing effects of polarized 

 irradiation. Funaria hygrometrica (Bryophytes), Botrytis cinerea (Fungi 

 imperfecti) 



b. Development of cell polarity; studied via group effects and chemotropism. 

 Botrytis cinerea (Fungi imperfecti) 



JAFFEE, O. C. B.A., M.S., Ph.D. — Dept. of Biol., Univ. of Buffalo, 

 BUFFALO 14, N.Y., U.S.A. 



a. Further studies of hemodynamics and cardiogenesis. Rana pipiens 

 (Anura) 



1. The effects of nephrectomy on cardiogenesis (pronephros). 



2. Cytological and histochemical studies on cardiac development, espe- 

 cially valvulogenesis. 



b. Cellular differentiation in the pronephros; cytology, histochemistry. Rana 

 pipiens (Anura) 



JAGER, B. de M.Sc — Div. of Fisheries, Beach Road, Sea Point, CAPE 

 TOWN, Republic of South Africa 



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