investigation have been carried out on the variation of γ-radiation dose (produced by radium daughters), due to changes of temperature, in order to evaluate its effects on living substances specially on man and to study to evaluate its effects on living substances specially on man and to study the variation of observed dose and its effects, following measurements have been done in five differen...

background and objective: professional radiation workers are occupationally exposed to long-term low levels of ionizing radiation. occupational health hazards from radiation exposure, in a large occupational segment of the population, are of special concern. biological dosimetry can be performed in addition to physical dosimetry with the aim of individual dose assessment and biological effects....

III. Determinants of Biological Effects ........................................................................................ 5-4 A. Rate of Absorption ..................................................................................................... 5-5 B. Area Exposed ............................................................................................................. 5-5 C. Var...

background: the specific antibody response against newcastle disease virus (ndv) in the blood serum of chickens hatched from eggs exposed to low dose gamma-radiation was studied. materials and methods: two groups of eggs of commercial meat chicken lines were irradiated with the dose of 0.30 gy 60co gamma-rays before incubation and on the 19th day of incubation, respectively. the same number of ...

the relationship between the way in which normal hemopoietic stem cells respond to irradiation alone or in the presence of bleomycin sulfate (blm-s) and actinomycin 0 (act-d) was investigated. single doses of blm-s at 0.3 mg/kg and act-o at 0.10 mg/kg body weight were injected intravenously 1-6 hours prior to whole body irradiation and treatment was repeated twice more with time intervals. when...

background: study of vascular and its secretory profile changes is an important issue in pathogenesis of radiation myelopathy. this paper reports the prostacyclin concentration changes after low-moderate doses of x-irradiation within a short period of time. materials and methods: cervical cords of wistar rats were irradiated to doses of 0.5, 1, 2, 4 and 6 gy x-rays. after 24 hours, 2 and 13 wee...

Many of our students seem to have well-defined but not necessarily well-founded opinions on the biological effects of ionizing radiation. During discussions of nuclear transformations in introductory chemistry and physics courses we might be able to help these students better understand the magnitude of these effects, and perhaps sort out the plethora of units with which radiation measurements ...

14.00 800x600 introduction: oral intake of vitamins which present antioxidant characteristics can protect living organisms against oxidative damage caused by exposure to ionizing radiation. it was previously reported that administration of high levels of vitamin c can lead to increased dna damage through production of hydroxyl radicals from hydrogen peroxide by the fenton reaction. however, our...

introduction the purpose of this study was to estimate organ and effective doses in patients undergoing some common x-ray examinations in sabzevar, iran. the effective dose is one of the best parameters for describing the amount of radiation dose received by a patient undergoing any diagnostic x-ray examination. the public dose from x-ray examinations depends on various factors, and its contrib...

introduction today, there is a growing interest in the use of hadrontherapy as an advanced radiotherapy technique. hadrontherapy is considered a promising tool for cancer treatment, given its high radiobiological effectiveness and high accuracy of dose deposition due to the physical properties of hadrons. however, new radiation modalities of dose delivery and on-line beam monitoring play crucia...