Energy Exchange and Enzyme Development During Embryogenesis 553 



tidases during amphibian embryogenesis at dif- 

 ferent temperatures. Compt. Rend. Lab. Carls- 

 berg, ser. chim., 2(?.-426-443. 

 Ludwig, D. 1950a The metabolism of starved 

 nymphs of the grasshopper, Chortophaga viridi- 

 fasciata, De Geer. Physiol. Zool., 23A1-47. 



1950b Changes in the distribution of 



nitrogen during starvation in the grasshopper, 

 Chortophaga viridifasciata, De Geer. Physiol. 

 Zool., 23.-208-213. 



Lyon, E. P. 1904 Cited from Needham, '31. 



Metzler, C. J., and Humm, D. G. 1951 The de- 

 termination of cholinesterase activity in the whole 

 brains of developing rats. Science, /y3;382-383. 



Meyerhof, O. 1911 Untersuchungen iiber die 

 Warmetonung der vitalen Oxydationsvorgange 

 in Eiern. Bioch. Zeit., 35.-279-315, 316-328. 



Mirsky, A. E., and Ris, H. 1949 Variable and 

 constant components of chromosomes. Nature, 

 y^3.-666-667. 



Moog, F. 1943 Cytochrome oxidase in early chick 

 embryos. J. Cell. & Comp. Physiol., 22.-223-231. 



1944a The chloretone sensitivity of frogs' 



eggs in relation to respiration and development. 

 J. Cell. & Comp. Physiol., 23.131-155. 



1944b Localizations of alkaline and acid 



phosphatase in the early embryogenesis of the 

 chick. Biol. Bull., 86:S\-m. 



1947 Adenyl pyrophosphatase in brain. 



liver, heart, and skeletal muscle of chick embryos 

 and hatched chicks. J. Exp. Zool., /05.-209-220. 

 1950 The functional differentiation of 



the small intestine. 1. The accumulation of al- 

 kaline phosphomonoesterase in the duodenum of 

 the chick. J. Exp. Zool, y/5.109-129. 

 1951 The functional differentiation of 



the small intestine. IL The differentiation of al- 

 kaline phosphomonoesterase in the duodenum of 

 the mouse. J. Exp. Zool., llS:\%7-20%. 



1952 The differentiation of enzymes in 



relation to the functional activities of the develop- 

 ing embryo. Ann. N. Y. Acad. Sci., 55.-57-66. 

 1953 The functional differentiation of 



the small intestine. IIL The influence of the pitu- 

 itary-adrenal system on the differentiation of 

 phosphatase of the suckling mouse. J. Exp. Zool., 

 ^2^.-329-346. 



, and Steinbach, H. B. 1945 Adenylpyro- 



phosphatase in chick embryos. J. Cell. & Comp. 

 Physiol., 25.-133-144. 



Moore, J. A. 1941 Developmental rate of hybrid 

 frogs. J. Exp. Zool, ,?^.-405-422. 



1946 Studies in the development of frog 



hybrids. J. Exp. Zool., ^0/; 173-21 9. 



Morgan, E. J. 1930 Xanthine oxidase in the 

 avian embryo. Bioch. J., 2'^;410-414. 



Nachmansohn, D. 1939 Cholinesterase dans le 

 systeme nerveux central. Boll. Soc. Chim. Biol. 

 (Paris), 2/;761-796. 



Needham, J. 1931 Chemical Embryology. Cam- 

 bridge University Press, Cambridge, England. 



■ 1932a On the true metabolic rate of the 



chick embryo and the respiration of its mem- 

 branes. Proc. Roy. Soc. London (B), /i0;46-74. 

 1932b A manometric analysis of the 



of fluoride, iodoacetate, and other reagents on the 

 respiration of blastoderm, embryo, and yolk sac. 

 Proc. Roy. Soc. London (B), y/^.- 114-138. 



1933 The energy sources in ontogenesis. 



VIL The respiratory quotient of developing 

 crustacean embryos. J. Exp. Biol., i0:79-87. 



1942 Biochemistry and Morphogenesis. 



Cambridge University Press, Cambridge, Eng- 

 land. 

 , and Nowinski, W. W. 1937 Intermedi 



metabolism in avian ontogenesis. IL The effects 



ary carbohydrate metabolism in embryonic life. 

 I. General aspects of anaerobic glycolysis. Bioch. 

 J., 3^.- 11 65-1 184. 



Negelein, E. 1925 t)ber die glykolytische Wir- 

 kung des embryonalen Gevvebes. Bioch. Zeit., 

 y^5.- 122-1 34. 



Nolf, L. O. 1932 Experimental studies on certain 

 factors influencing the development and viability 

 of the ova of the human Trichurus as compared 

 with those of the human Ascaris. Am. J. Hyg., 

 /^.•288-322. 



Novikoff, A. B.. and Potter, V. R. 1948 Changes 

 in nucleic acid concentration during the develop- 

 ment of the chick embryo. J. Biol. Chem., 173: 

 233-238. 



■, Potter, V. R., and Le Page, G. A. 1948 



Phosphorylating glycolysis in the early chick em- 

 bryo. J. Biol. Chem., y73.-239-252. 



Ohman, L. O. 1940 Uber die Veranderung des 

 respiratorischen Quotienten wahrend der Friih- 

 entwicklung des Seeigeleies. Arkiv for Zool., 

 32A-1-9. 



Parnas, J. K., and Krasinka, Z. 1921 Ueber den 

 Stoffwechsel der Amphibienlarven. Bioch. Zeit., 

 //^.■108-137. 



Philips, F. S. 1940 Oxygen consumption and its 

 inhibition in the development of Fundulus and 

 various pelagic eggs. Biol. Bull.. 7c?.-256-273. 



1941 The oxygen consumption of the 



early chick embryo at various stages of develop- 

 ment. J. Exp. Zool., 86:257-289. 



1942 Comparison of the respiratory rates 



of different regions of the chick blastoderm during 

 early stages of development. J. Exp. Zool., 90:83- 

 100. 



Pollister, A. W. 1954 Cytochemical aspects of 

 protein synthesis; in Dynamics of Growth Proc- 

 esses, edited by E. J. Boell, pp. 33-67. Princeton 

 University Press, Princeton, New Jersey. 



Porter, K. R. 1954 Cell and tissue differentiation 

 in relation to growth; in Dynamics of Growth 

 Processes, edited by E. J. Boell, pp. 95-110. 

 Princeton University Press, Princeton, New 

 Jersey. 



Potter, V. R., and DuBois, K. P. 1 942 The quanti- 

 tative determination of cytochrome c. J. Biol. 

 Chem., /•^2.-41 7-426. 



, Schneider, W. C, and Liebl, G. J. 1945 



Enzyme changes during growth and differentia- 

 tion in the tissues of the new born rat. Cancer 

 Res., 5;21-24. 



Raven, C. P. 1935 Experimentelle Untersuch- 

 ungen iiber den Glykogen-Stoffwechsel des Or- 

 ganizationszentrums in der Amphibiengastrula. 

 Proc. Konin. Akad. Wetensch., 35.- 11 07-1 109. 



Reddy, D. V. N., Lombardo, M. E., and Cerecedo, 



