334 



\ene Literatiir. 



Lioeb, J., Tlie reversal of the sign of the charge of collodion membranes by trivalent 



cations. (Journ. Gen. Phys. ig20. 2, 659 — 673.) 

 — , lonic radius and ionic efficiency. (Ebenda. 673 — 688.) 



— , Quantitative laws in regeneration. I and II. (Ebenda. 297 — 308, 651 — 659.) 

 — , The nature of the directive influence of gravity on the arrangement of organs 



in regeneration. (Ebenda. 373 — 387.) 

 — , Ion series and the physical properties of proteins. I. (Ebenda. 3j 85 — 107.) 

 Mc Guire, G., and Falk, K. G., Studies on enzyme action. XVIII. The saccharo- 



genic actions of potato juice. (Ebenda. 2, 215 — 229.) 

 Northrop, J. H., The influence of the Substrate concentration on the rate of 



hydrolysis of proteins by pepsin. (Ebenda. 595 — 613.) 

 — , The combination of enzyme and Substrate. I. A method for the quantitative 



determination of pepsin. IL The effect of the hydrogen ion concentration. 



(Ebenda. 1919. 2, 113 — 123.) 

 — , The influence of hydrogen ion concentration on the inactivation of pepsin Solutions. 



(Ebenda. ig20. 2, 465 — 471.) 

 — , The effect of the concentration of enzyme on the rate of digestion of proteins 



by pepsin. (Ebenda. 471 — 499.) 

 Osterhout, W, J. V., Comparative studies on respiration. VII. Respiration and 



antagonism. (Ebenda, /p/p. 2, i — 5.) 

 — , The mechanism of injury and recovery. (Ebenda. ig20. 3, 15 — 21.) 

 Phipps, W. H., Effect of pollination on the life of flowers. (Flower Grower. 



ig2o. 7, 182.) 

 Raber, O. L,, A quantitative study of the effect of anions on the permeability of 



plant cells. (Journ. Gen. Phys. 7p20. 2, 535 — 541.) 

 — , The antagonistic action of anions. (Ebenda. 541 — 5450 

 Reed, H. S., The nature of the growth rate. (Ebenda. 445 — 563.) 

 Smith, A., A lesson on plant physiology and the plant in relation to its environ- 



ment. (Gard. Chron. Am. ig20. 24, 376 — 379.) 



Fortpflanzung und Vererbung. 



Anthony, R. D., Asexual inheritance in the violet. (New York Agr. Exp. Sta. 



Bull. 76. ig20. 3—55.) 

 Blakeslee, A. F., A dwarf mutation in Portulaca showing vegetative reversions. 



(Genetics. ig2o. 5, 419 — 433-) 

 Saunders, E. R., Heredity. (Sei. Am. Mo. ig2o. 2, 435 — 440.) 



Ökologie. 



Bevis, J. F., and Jeffrey, H. T., British plants: their biology and ecology. 



Second edition, revised and enlarged. Methuen. ig20. 346 S. 

 Porsaith, C. C, Anatomical reduction in some alpine plants. (Ecology. ig20. 1, 



124—135.) 

 Lakon, G., Über die »Krypten« der Coprosma-Blätter. (Centralbl. f. Bakt. IL Abt. 



ig2i. 53, I — 7.) 



Myxomyceten. 



Matz, J., A new vascular organism in sugar cane. (Journ. Dept. Agr. Porto Rico. 



ig2o. 4, 41 — 46.) 

 Schinz, H., Myxogasteres oder Schleimpilze. (Rabenhorsts Kryptogamenflora, Pilze. 



IG. Abt. 127. Lief. 7p2o. 385 — 472.) 



Algen. 



Hampton, H. C, and Baas-Becking, L. G. M., s. unter Physiologie. 



