722 RADIATION BIOLOGY 



Menkin, V. (1940) Dynamics of inflammation. The Macmillan Company, New- 

 York. 

 Ohmke, W. (I'JUS) Ubcr die Lichtempfindlichkeit woisser Tiere nach Buchweizen- 



genuss (Fagopyrismus). Zentr. Physiol., 22: 685-686. 

 Pace, N. (1942) The etiology of hypericism, a photosensitivity produced by St. 



Johnswort. Am. J. Physiol., 136: 650-656. 

 Pace, N., and G. Mackinney (1941) Hypericin, the photodynamic pigment from 



St. Johnswort. J. Am. Chem. Soc, 63: 2570. 

 Perrin, D. D., E. P. White, and N. T. Clare (1953) Some recent advances 



in facial eczema research. Proc. New Zealand Soc. Animal Production, 13: 



121-125. 

 Quin, J. I. (1933a) Studies on the photosensitization of animals in South Africa. 



VI. The effect of surgical obstruction of the normal bile flow. Onderstepoort 



J. Vet. Sci. Animal Ind., 1: 505-526. 

 — ■ ■ (1933b) Studies on the photosensitization of animals in South Africa. 



V. The toxicity of Lippia rehmanni Pears, and Lippia pretoriensis Pears. Onder- 

 stepoort J. Vet. Sci. Animal Ind., 1: 501-504. 

 ■ (1933c) Photodynamic action of H ypericum ethiopicum and H. leucoptycodes. 



Onderstepoort J. Vet. Sci. Animal Ind., 1: 491-496. 

 Raab, O. (1900) Ueber die Wirkung fluoresierender Stoffe auf Infusorien. Z. Biol., 



39: 524. 

 Rask, E. N., and W. H. Howell (1928) The photodynamic action of hematopor- 



phyrin. Am. J. Physiol., 84: 363-377. 

 Ray, G. (1914) Note sur les effets toxiques du millepertuis a feuilles crispees. Bull. 



soc. centr. de med. vet. Paris, 68: 39-42. 

 Rimington, C, and A. W. Hemmings (1938) Porphyrinuria following sulphanilamide 



dermatitis. Lancet, 234: 770. 

 Rimington, C, and J. I. Quin (1934) Studies on the photosensitization of animals 



in South Africa. VII. The nature of the photosensitizing agent in geeldikkop. 



Onderstepoort J. Vet. Sci. Animal Ind., 3: 137-157. 

 (1935) The isolation of an icterogenic principle from Lippia rehmanni Pears. 



S. African J. Sci., 32: 142-151. 

 — (1937a) Studies upon the photosensitization of animals in South Africa. 



X. Isolation of active principles from Lippia rehmanni Pears. Onderstepoort 



J. Vet. Sci. Animal Ind., 9: 225-255. 

 ■ — (1937b) Dikoor or geeldikkop on grass-veld pastures. J. South African 



Vet. Med. Assoc, 8: 141-145. 

 Rocha e Silva, M. (1940) Fotosensibilizacao em bovinos. "Peste das Quiemados," 



doenga causada pelo Holocalyx glaziovii (alecrim). Arquiv. inst. biol. Sao Paulo, 



11: 461-468. 

 Rottgardt, A. A. (1944) Fotosensibilizacion. Anales Fac. Med. Vet. Univ. La Plata, 



7: 49-124. 

 Sheard, C, H. Caylor, and C. Schlotthauer (1928) Photosensitization of animals 



after the ingestion of buckwheat. J. Exptl. Med., 47: 1013-1028. 

 Smetana, H. (1938) Studies on photodynamic action. I. Photo-oxidation of body 



fluids. J. Biol. Chem., 124: 667-691. 

 Stewart, J. L. (1947) Toxicity of phenanthridinium 1553 for cattle in the Gold 



Coast. Vet. Record, 59: 462. 

 Steyn, D. G. (1943) Poisoning of animals by algae (scum or water-bloom) on dams 



and pans. Farming in South Africa, 18: 489-492. 

 Straub, W. (1904) The action of eosin solution on oxidizable substances. Arch. 



exptl. Pathol. PharmakoL, 51: 383-390. 



