STUDY THE POSSIBILITY KILLING OF Escherichia coli AFTER IRRADIATION BY DIODE WITH TWO POWER (3,7)W LASER.

Abstract

In this study was used diode lasers to kill Escherichia coli.Two types of diode laser have been used. The first one 3-watt 810 nm wavelength and the second 7 watt wavelength 1064 nm.   Irradiation of samples was taken place from the physiological saline containing the Escherichia coli in three sizes  0.3,0.2, 0.1  cm ³ in test tubes of size  0.5  cm³. Samples were irradiated at different periods of time for each laser. The results showed that after each irradiation a highest kill of 100% of the bacteria occurred by used  laser diode  (3 W) through a period of 20 minutes.   In the diode laser (7 W) a recording of the highest kill rate of 100% has been obtained in 1.5 min period.