title: THE INFLUENCE OF ROENTGEN RAYS UPON THE NITROGEN FIXATION BY AZOTOBACTER.
abstract: The influence of graded x-ray doses upon nitrogen fixation and respiration by Azotobacter was studied by means of the Warburg method. It was found that nitrogen fixation decreases approximately linearly with increasing x-ray doses. Respiration in contrast is affected only indirectly through some inhibition of cell multiplication. Small doses of x-ray often produce a slight and transient increase in the rate of oxygen uptake.
authors.affiliation: Biological Laboratories, Harvard University, Cambridge, Massachusetts, and the Haskins Laboratories, New York, New York.
authors.forename: R M
authors.initials: RM
authors.lastname: Whelden
authors.forename: E V
authors.initials: EV
authors.lastname: Enzmann
authors.forename: C P
authors.initials: CP
authors.lastname: Haskins