Lorn 57 Luyendijk 



LOMBARD, G. L. M.Sc. — Hubrecht Lab., Internat. Embryol. Inst., 2, 

 Janskerkhof. UTRECHT, Holland. 



a. Investigations into the effects of LiCl on the early development of 

 Xenopus laevis, Daudin and Amblystoma mexicanum. (Amphibians) 



b. Homoplastic transplantations of presumptive notochord and neural areas 

 respectively, between Lithium-treated and normal blastulae/early gas- 

 trulae in Triturus and Xenopus. (Amphibians) 



LOO, Miss R. P. van — Zool. Lab. der Rijks Univ., Janskerkhof 3, 

 UTRECHT, Holland, 

 a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- 

 boration with G. A. van ARKEL, Miss E. v. d. BROEK, Mrs A. S. 

 DUYKER— de BEER. Miss W. H. T. van HEESCH, J. C. N. KOK, 

 J. W. KUIPER, G. D. NIJENHUIS, Miss J. E. H. SMIT and W. L. 

 van UTRECHT) 



L0VTRUP, S. Mag.scient. — Cytochem. Dept, Carlsberg Lab., 8, Gl. 

 Carlsbergvej., COPENHAGEN Valby, Denmark, 

 a. Proteolytic enzymes during amphibian development. Amblystoma mexi- 

 canum and Xenopus laevis 



LUBCHENCO, L. M.D. — Univ. of Colorado, Med. Center, Dept of 

 Pediatrics, 4200 east Ninth Ave, DENVER 7, Col., U.S.A. 



a. Study of differentiation of chick somites in explants (Spratt technique). 

 (Aves) (in collaboration with H. HERRMANN, J. McKENZIE and 

 U. ROTHFELS) 



b. Study of developmental disturbances related to nutritional deficiencies 

 investigated by application of anti-vitamins and anti-amino acids to the 

 intact egg and to explants (somites). In particular, it will be attempted 

 to define the factors which maintain the balance between myotome, 

 sclerotome and dermatome during differentiation of the somite and are 

 required for the normal development of the retina (possible connection 

 with retrolental fibroplasia of the premature human infant) (Aves) 



(in collaboration with H. HERRMANN, J. McKENZIE and U. 



ROTHFELS) 

 LUMB, Miss E. S. Ph.D. — Dept of Biol., Coll. of Arts and Sci., Univ. 



of Rochester, ROCHESTER 3, N.Y., U.S.A. 

 a. A cytochemical study of the nucleic acids in the differentiating spinal 



nervous system of the chick. Gallus domesticus (Aves) 

 LOSCHER, M. Dr — Zool. Anstalt, Univ. Basel, BASEL, Schweiz. 



(no data received over this year) 

 LUTHER, W. Dr Phil., Prof. — Zool. Inst, der Univ., MARBURG, 



Deutschland. 



a. Determination of the regenerating blastema. (Amphibia) Mammalia) 



b. Effects of X-rays on growth and cell division; tumors. (Amphibia and 

 LUTZ, H. Dr es Sc. — Lab. de Zool., Fac. des Sci., 1, Avenue Vercingetorix, 



CLERMONT, France. 



a. Developpement du blastoderme de cane pendant les premieres heures de 

 l'incubation. (Aves) [embryons. 



b. La polyembryonie experimentale chez les oiseaux; l'orientation des 

 LUYENDIJK, W. Arts — Anat.-Embryol. Lab. of the Univ. of Leyden, 



Fac. of Med., Boerhaavekwartier, Wassenaarseweg, LEIDEN. Holland, 

 a. Development of diencephalon and hypophysis hi man. (Mammals) (in 

 collaboration with J. DANKMEIJER) 



