The percentage of apoptotic cells increased significantly with increasing X-ray dose in both SW48 and SW707 cultures (P<0.0001).
In such a thermionic filament-based X-ray tube, high temperature operation of the filament is necessary to increase X-ray dose rate, reducing the lifetime of the filament especially in non-high vacuum environment.
Though seed treatment with ultra-violet radiation had not been found effective, pre- or post-treatments with X-rays have been found to decrease or increase X-ray-induced mutation rate (depending on the X-ray dose) in hexaploid wheat4,5 and oats6.
Healthy tissue tolerance remains the major limiting factor of anticancer radiotherapy and techniques are investigated to enhance the local control of tumours by increasing the absorbed X-ray dose, while preserving more efficiently the healthy surrounding tissues.
The radiosensitization obtained by the Ro-07-0582 increased with the X-ray dose above 25 gray.
Moreover, as the X-ray dose was increased, the inhibition rate of the 4T1 cells increased significantly.
That is, it will decrease the output power, lower the beam current, decrease the X-ray dose rate, increase the reflection power, and result in unstable operation of the accelerator.
At the same time, the white line decreases in intensity as the X-ray dose increases, until only the signatures of paratacamite and cuprite remain in the spectrum.
To know not only the number of X-ray photons but also their energies (or wavelenghts), will increase the information content of the resulting image, given the same X-ray dose.
Long-term clonogenic survival assays on mESCs after irradiation with X-rays doses increasing from 0 7Gy revealed a dose-dependent decrease of the surviving fraction (SF) in all five lines (Fig. 1C).
PA, etc. Diagnostic X-Ray Doses, Past and Present.
