BIOLOGICAL CHEMISTRY.— The measurement of the oxidase content 

 of plant juices. H. H. Bunzel, XI. S. Department of Agriculture. 

 Bulletin 238, Bureau of Plant Industry. 1912. 

 The very voluminous literature on the role and importance of oxidiz- 

 ing enzymes in many life processes of plants and animals makes a thoro 

 study of their behavior, function, and distribution necessary. They 



Fig. 1. Apparatus for measuring oxidase action 



play an important part in certain pathological conditions, and in 

 numerous industrial, and agricultural problems. As specific examples 

 may be mentioned the work done by Woods, in the Bureau of Plant 

 Industry, on the mosaic disease of tobacco, the work of Palladin and his 

 school on the respiration of plants, and the causal relationship between 

 the oxidases and color production as shown for plants by Palladin, and 

 for animals by Gortner. They also play an important part in the darken- 

 ing of tea, and the manufacture of the Japanese lacquer. 



209 



