نتایج جستجو برای: natural gamma radiation
تعداد نتایج: 818838 فیلتر نتایج به سال:
background: the effect of low dose radiation on immune system is shown. ionizing radiation can affect cytokine production and polarization of t helper cells. objective: the current study focused on ionizing radiation in ukrainian children residing in a contaminated area with clinical irritable bowel syndrome. method: our study included 75 rural children population aged 4-18 yrs, who lived in a ...
BACKGROUND Exposures to high-dose ionizing radiation and high-dose rate ionizing radiation are established risk factors for childhood acute leukemia (AL). The risk of AL following exposure to lower doses due to natural background radiation (NBR) has yet to be conclusively determined. METHODS AL cases diagnosed over 1990-2009 (9,056 cases) were identified and their municipality of residence at...
Melanins are natural pigments distributed in living organisms and they are responsible for pigmentation of surface structure. In the present work, gel exclusion chromatography, spectrophotometric, and dielectric relaxation techniques were used to characterize DOPA melanin before and after irradiation with 60 Co gamma rays in the range of 5 to 50 Gy. The results show that the studied melanin is ...
Exposure to the natural background gamma radiations in both indoor and outdoor environments is inevitable. The long-term exposure such could result lung cancer (sometimes leukaemia, CNS tumours); hence it must be constantly monitored. In this paper, an attempt made review radiation doses reported at various locations for south Indian environment was found that levels coastal regions were relati...
Introduction: Despite the extensive use of ionizing radiation in diagnosis and therapeutic procedures, development of radio-protector agents is important in modulating normal tissue damages. Hesperidin(HES) is a Flavanone glycoside, belonging to the Flavonoid family in human diet abundantly and noted for its many beneficial effects. The aim of present study was investigated to ...
objective: in radiation treatment, the irradiation which is effective enough to control the tumors far exceeds normal-tissues tolerance. thus to avoid such unfavourable outcomes, some methods sensitizing the tumor cells to radiation are used. iododeoxyuridine (iudr) is a halogenated thymidine analogue that known to be effective as a radiosensitizer in human cancer therapy. improving the potenti...
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