Table 1. Effect of Ultra Violet Radiation on Survival Rate and Death at Different Time Intervals.

	No. of Colonies/Plate	Percentage of Survival Rate	Percentage of Death
Control	340	100	0
UV30	280	82.35	17.6
UV60	232	68.2	31.7
UV90	210	61.7	38.2
UV120	150	44.1	55.9