نتایج جستجو برای: gamma irradiant
تعداد نتایج: 122632 فیلتر نتایج به سال:
Backgrounds and Objectives: Due to importance of ionizing radiation on human health, many studies have been performed to measure the background gamma radiation all around the world as well as some cities in lran. According to this fact that everybody spends almost 80% of his time in indoor areas, this study was carried out to measure the amount of background gamma radiation in indoor areas in Z...
The coastal area of Ramsar in northern of Iran located in the province of Mazandaran has been known as the highest levels of natural radiation background in the world. The background radiation is mainly due to the presence of radioactive isotopes of the radium element and its decay products, which is brought to the surface by hot springs. In this study, the indoor gamma dose rate in Ramsar wa...
Gamma-ray detection has an important role in the enhancement the nuclear safety and provides a proper environment for applications of nuclear radiation. To reduce the risk of exposure, aerial gamma survey is commonly used as an advantage of the distance between the detection system and the radiation sources. One of the most important issues in aerial gamma survey is the detection noise. Various...
objective(s): this study was performed to investigate the effects of mucosal acidification on mrna expression and protein synthesis of cystathionine gamma lyase (cse), cystathionine beta synthase (cbs), and mucosal release of h2s in gastric mucosa in rats. materials and methods:thirty-two rats were randomly assigned into 4 groups (8 in each), including: the control group, hcl (10 mm) treated gr...
background: seaweeds contain significant quantities of lipids, protein, vitamins and minerals. aquavac ergosan contains 1% alginic acid extracted from two brown seaweeds, laminaria digitata and ascophyllum nodosum. both in vivo and in-vitro researches have mainly been focused on the effect of ergosan on fish growth, survival rate, reproductive performance and innate immunity in blood and epider...
background: turkey, especially the northern part of it, was one of the countries which were contaminated by the chernobyl accident. rize is a city located in the northeastern district of turkey which was heavily influenced by the chernobyl nuclear accident. materials and methods: in this study, the activity concentrations of natural (226ra, 232th, 40k) and artificial (137cs) were measurements ...
background: a new biological dosimeter based on methemoglobin level was developed in this study. materials and methods: methemoglobin level in erythrocytes from mice subjected to γ rays from a 60co source was detected using the methemoglobin kit. the dose range was from 0.5 to 8 gy and the dose rate was 0.5 gy/min. results: the results demonstrate that methemoglobin level increases with increas...
the nasal cavity possesses many advantages as a site for drug delivery, such as, ease of administration, applicability for long term treatments and a large surface area for absorption. one important limiting factor for nasal drug delivery is the limited time available for absorption within the nasal cavity due to mucociliary clearance. several drug delivery systems including different kinds of ...
tuberculosis pericarditis as a potentially fatal complication of tuberculosis requires effective diagnosis and treatment. we evaluated the efficacy of interferon-gamma (ifn-gamma) and adenosine deaminase (ada) for diagnosing tuberculosis pericarditis in a cohort of iranian patients presenting with pericarditis. we enrolled 38 patients with presentation of pericarditis. all patients underwent di...
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