AN adequate supply of highly purified water is an essential requirement for the study of plant nutrition problems, particularly those relating to mineral deficiencies, when experiments are carried out ...

FOUR nucleosides—guanosine, adenosine, cytidine and uridine—are formed in the hydrolysis of yeast ribonucleic acid by aqueous pyridine, and Bredereck et al. 1 have described a method of isolating the ...