ROENTGEN RAYS

Instruction in Use of Roentgen Rays

Roentgen Rays in the Diagnosis of Lung Disease

Use of the X-rays in this connection is confined. At a feting such as this, where the undoubted value of screen |v?rk cannot be demonstrated, the consciousness of that limita?n is in a very special manner present to one's mind. Yet, though the actual phenomena are such that they cannot be . ?vvn by lantern, some of them are of such great interest and ^tance as to demand something more than a me...

Inactivation of the influenza virus by low voltage roentgen rays.

A number of viruses have been subjected to various types of ionizing radiations in an attempt to correlate the structure of the elementary body with a given function. Some of the conclusions drawn from investigations on bacteriophage and animal viruses have been substantiated by other experimental methods. According to the target theory, the passage of an ionizing particle through a biological ...

The Effects of Roentgen Rays on Cell-virus Associations

The virus-induced papillomas of cottontail as well as domestic rabbits regress completely within a few weeks when exposed to 5,000 r of x-ray irradiation. The x-rays do not immediately kill the papilloma cells, but lead to death by inhibiting cellular division and producing pathological changes in the cells which then continue to differentiate. The virus associated with the growths, however, no...

The Influence of Roentgen Rays upon the Nitrogen Fixation by Azotobacter

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 increas...