نتایج جستجو برای: external environmental radiation
تعداد نتایج: 775132 فیلتر نتایج به سال:
A review on the impact of radiofrequency radiation from wireless telecommunications on wildlife is presented. Electromagnetic radiation is a form of environmental pollution which may hurt wildlife. Phone masts located in their living areas are irradiating continuously some species that could suffer long-term effects, like reduction of their natural defenses, deterioration of their health, probl...
background and objective: hypothyroidism is a known consequence of the external beam radiotherapy to the neck encompassing the thyroid gland for over 40 years. the aim of this study was to find out the incidence of hypothyroidism in patients with head and neck cancer treated with radiotherapy, when radiation portals included whole of the thyroid gland. materials and methods: this prospective no...
most popular sources for electromagnetic waves. however, there are many concerns regarding their biological effects on the body, especially the central nervous system. therefore, the aim of this study was to evaluate the effects of cell phone radiation on histology of the cerebellar granular cells in the neonatal rat. materials and methods: we selected some wistar rats. then, we randomly divide...
External radiation seems to be associated with increased amounts of cytokines and other cellular modulators. Impaired microcirculation and fibrosis are examples of typical long term damage caused by radiotherapy. Adipose tissue-derived stem cells (ASC) are discussed to enhance wound healing, but their role in wounds due to radiotherapy is poorly understood. Normal human fibroblasts (NHF) and AS...
To confirm the availability of individual dose evaluation for the return of residents after the accident at the Fukushima Dai-ichi Nuclear Power Plant (FNPP), we evaluated individual doses of radiation as measured by personal dosimeters in residents who temporarily stayed in Evacuation Order Areas in Kawauchi village, which is partially located within a 20 km radius of the FNPP. We also compare...
social incentives that bring them into existence and sustain them in the course of time. non-governmental organizations (ngos), whether based in the global north or south, are not different. unfortunately, numerous ngos start up and then fail, because the passion of the founder is not supported by a sustainable organization volunteers in all sectors are working with ngos. the ngos are citizen...
External-beam radiation therapy with intracavitary high-dose-rate brachytherapy is the standard treatment modality for advanced cervical cancer; however, late gastrointestinal complications are a major concern after radiotherapy. While radiation proctitis is a well-known side effect and radiation oncologists make an effort to reduce it, the sigmoid colon is often neglected as an organ at risk. ...
Most patients referred for radiation therapy have large tumor volumes requiring high doses of radiation for control of locoregional disease. Dose escalation with external-beam radiation therapy is limited by tolerance of the surrounding normal structures. Brachytherapy is one method of delivering a higher radiation dose to the tumor while sparing the surrounding normal tissues, in an attempt to...
A prediction for the energy shift of the synchrotron spectrum of flat-spectrum radio quasars (FSRQs) during high-energy flares is presented. If the γ-ray emission of FSRQs is produced by Comptonization of external radiation, then the peak of the synchrotron spectrum is predicted to move to lower energies in the flare state. This is opposite to the well-known broadband spectral behavior of high-...
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