Both hypochlorite and ionizing radiation induce oxidation processes of biomolecules. The effects are dependent to a large degree on the dose of the oxidizing agent. Previously we observed that split doses of gamma radiation caused lower hemolysis than the same but single doses. The critical factors influencing the occurrence of this effect were: the value of the first dose and the time between ...

PURPOSE To investigate the level of doctors' and intern doctors' knowledge about patients' radiation exposure doses during common radiological examinations. MATERIALS AND METHODS A questionnaire listing the radiation doses of routine radiological diagnostic procedures was administered to 177 doctors and intern doctors. We asked them to find the equivalent doses of radiation for common radiolo...

For over 30 years, astronauts in Earth orbit or on missions to the moon have been exposed to space radiation comprised of high-energy protons and heavy ions and secondary particles produced in collisions with spacecraft and tissue. Large uncertainties exist in the projection of risks of late effects from space radiation such as cancer and cataracts due to the paucity [corrected] of epidemiologi...

The risk to non-human biota from exposure to ionizing radiation is of current international interest. In calculating radiation doses to humans, it is common to multiply the absorbed dose by a factor to account for the relative biological effectiveness (RBE) of the radiation type. However, there is no international consensus on the appropriate value of such a factor for weighting doses to non-hu...

Tumor suppressor protein p53 is a transcription factor that plays important roles in biological responses to a wide range of ionizing radiation doses. Elucidation of the molecular mechanisms for its function after actually relevant doses of radiation is therefore crucial for the accurate understanding of the biological effects of radiation. p21 is one of the p53 target genes, functioning in cel...

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...

AIM To comprehensively summarize the most important literature regarding the late effects of radiotherapy to the abdomen in childhood and adolescence. MATERIALS AND METHODS Published trials, studies and series were identified using the PubMed database. The key words late effects, late sequelae, child, radiation, radiotherapy, abdomen, kidney, liver, and bowel were used. RESULTS A dose-volum...

This didactic text is devoted to the protection of patients against unnecessary exposure to ionising radiation. It is organised in a questions-and-answers format. There are obvious benefits to health from medical uses of radiation, in x-ray diagnostics, interventional radiology, nuclear medicine, and radiotherapy. However, there are well-established risks from high doses of radiation (radiother...

The purpose of the research was determine the effects of gamma ray on seed germination, seedling height and root length of Rice (Oryza sativa L. spp. Indica cv. MR219) to identify the Lethal Dosage of the radiation. Paddy seeds of MR219 were exposed to different doses of gamma radiations viz 50,100,150,200,250,300,350,400,450,500,600,700,800,900 and 1000 Gy using 60Co as the radiation source. T...