effects of induced mutation via gamma irradiated with 250 gy dose (in nuclear agriculture research school- nuclear science and technology research institute) on trichoderma harzianum conidiaon chitinase activity by sts molecular marker have been evaluated in this study. among 20 irradiated mutants which selected via improved antagonistic capability against rhizoctonia solani, pcr amplified chit...

background: the biological effects of radiation on radiology personnel are divided into two groups of deterministic effects and stochastic effects. due to the effects of radiation on health, radiology staff may be afraid of radiation. younger personnel with little work experience, compared with older personnel, have higher level of fear. the fear among radiology personnel, like employees of var...

hen the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) submitted its 1994 report to the United Nations General Assembly this year, the international community received a fuller picture of the biological effects of low doses of ionizing radiation. The 272-page 1994 report specifically addresses epidemiological studies of radiation carcinogenesis and adaptive res...

water contaminated with petroleum hydrocarbons has harmful effects on health, economy and environment. in this study, photolysis process for treating petroleum hydrocarbons was investigated. hence different initial cods with different uv-c radiation power were examined. based on the energy consumption per unit of cod removed, cod of 350 mg/l and radiation power of 80 w were chosen as the optimu...

Historically it has been shown repeatedly that single high doses of radiation do not allow a therapeutic differential between tumor and critical normal tissues but dose fractionation does. The purpose of conventional dose fractionation is to increase dose to the tumor while preserving normal tissue function. Tumors are generally irradiated with 2Gy dose per fraction delivered daily to a more or...