Effects of Temperature on Sensitivity of Bacilus licheniformis RI 75-1 Vegetative Cells at Gamma Quantum

It is known that strains of E. Coli with wild genotype for reparation, when are irradiated at temperature between 420C and 450C, shown an increase of radioresistance. At the given temperature the number of double strands breaks of DNA decrease. Some authors report that the radioresistance increased is due to the elevation of the irradiation temperature is related to the cell membrane status. The paper includes reports on the effects of increased temperature on the sensitivity - at gamma quantum - of Bacillus licheniformis RI 75-1 vegetative cells. Temperatures of 420C and 600C during irradiation were employed. An increase in radioresistance was found when the temperature of irradiation was increased to 420C. However, a decrease in viability was observed. Heat treatment prior to irradiation showed an increase in the number of radioresistance colonies when compared. (author)