Johbu Itoh at the Tokai University School of Medicine in Japan has developed a new and highly effective cancer therapy method where cancer cells are irradiation with ultraviolet C (UVC) light.
MCF7: neoplastic cell, COS7:non-neoplastic cell. The Ultra Violet C (UVC) pulse flash irradiation only selectivity caused death of neoplastic cells, and not non-neoplastic cells. © Tokai University
The new method employs high intensity-UVC pulse flash rays (UVCPFR) of a broad UVC spectrum (230 to 280 nm) produced by a modified UV-flash sterilization system (BHX200). The experiments showed the pulsed nature of the spectrum to enhance the efficiency of destruction of neoplastic cells.
Importantly, the research demonstrates that under the appropriate UVC irradiation conditions only neoplastic cell were destroyed, and non-neoplastic cells did not reach conditions of cell death.
In contrast, the sterilization effects of UV pulsed flash rays (wavelengths of 230–280nm and peak wavelength of 248 nm) show promise as more efficient and rapid means of destroying a wider range of bacteria because this type of irradiation produces light whose energy is tens of thousands of times greater for a given area of irradiation, compared with conventional UV lamps (65W equivalency).
UVC pulse flash rays (UVCPFR) with 1–10 continuous flashes per second can be produced by powerful discharge of xenon gas. Johbu Itoh and colleagues at the Tokai University School of Medicine has developed and established UVCPFR therapy system for cancer therapy.
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Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
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