نتایج جستجو برای: non ionizing radiation
تعداد نتایج: 1531469 فیلتر نتایج به سال:
Background: Ionizing and non-ionizing radiation are widely used in the diagnosis and treatment of diseases. Considering the potential risks of radiation, radiation safety training courses are important for medical staff. Objective: The aim of this study was to investigate the effectiveness of one-day radiation safety training program in increasing the radiation safety knowledge of physicians....
Knowing the amount of ionizing photons from young star-forming galaxies is of particular importance to understanding the reionization process. Here we report initial results of Subaru/Suprime-Cam deep imaging observation with a special narrow-band filter to optimally trace ionizing radiation from galaxies at z > 3. The unique wide field-of-view of Suprime-Cam enabled us to search for ionizing p...
BACKGROUND Melanin pigments are ubiquitous in nature. Melanized microorganisms are often the dominating species in certain extreme environments, such as soils contaminated with radionuclides, suggesting that the presence of melanin is beneficial in their life cycle. We hypothesized that ionizing radiation could change the electronic properties of melanin and might enhance the growth of melanize...
introduction: ionizing radiation induces various kinds of dna damage in which may lead to chromosomal aberrations (ca). inspite of growing importance in the risk assessment, the dose yield kinetics of ca and their implications for dose assessment are not well established in exposures to low level radiation. in the present study, cytochalasin-b blocked micronucleus assay and metaphase analysis w...
Background and Objective: With the increase of cardiovascular diseases worldwide, diagnostic and therapeutic measures, particularly nuclear medicine technology, have also increased. A multiplicity of diagnostic procedures are used for treating many patients with cardiovascular diseases in Farshchian Cardiovascular Hospital, Hamadan, Iran; therefore, the staff of this hospital, especially non-in...
Ionizing radiation induces a diverse spectrum of DNA lesions, including strand breaks and oxidized bases. In mammalian cells, ionizing radiation-induced lesions are targets of non-homologous end joining, homologous recombination, and base excision repair. In vitro assays show a potential involvement of DNA polymerase lambda in non-homologous end joining and base excision repair. In this study, ...
The space environment consists mainly of high-energy charged particles, such as protons, electrons and heavy ions. They are originating from several sources including galactic cosmic radiation, solar flares and van Allen belts. High energy electromagnetic radiation and neutrons have also been measured on spacecraft. Although shielding can reduce the effect of space radiation it cannot be elimin...
The aim of this study was to investigate the radioprotective effect of thymol as a natural product against salivary glands dysfunction induced by ionizing radiation in rats. The rats were treated with thymol at dose of 50 mg/Kg before exposure to radiation at dose 15Gy. Salivary gland function was evaluated with radioisotope scintigraphy and then salivary gland to background counts ratio was ca...
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