دراسة تأثير نمط تشغيل ليزر النيديميوم- ياك على قتل خلايا بكتيرية مرضية في محلول ملحي فسيولوجي

Abstract

Samples of physiologyical solution which contain Escherichia.coli bacteria in a one size 0.5cm3 were prepared, then samples has been radiated by Nd-YAG laser with two mode working in different periods, same dose and wavelength to compare between high power and low power laser for percent of killing, the results revealed occurrence of higher percent of killing by pulsing mode than continuous mode due to destroyed cell when it is absorb a high energy in short time that won't expand the cell by heat that it is happen in long time and a low energy.