نتایج جستجو برای: uranium deposit
تعداد نتایج: 26285 فیلتر نتایج به سال:
Important for irrigation, the transboundary river basin between Kyrgyzstan and Kazakhstan is vulnerable to geochemical anthropogenic sources of pollution. The use water indices, together with measurements elemental radionuclide composition bottom sediments, provides a means evaluating continued from this region. Recent monitoring shows highest concentrations hazardous contaminants include lead ...
ABSTRACT Background : Natural uranium exists in earth crust and seawater. The concentration of uranium might increase by human manipulation or geological changes. The aim of this study was to verify susceptibility of laser flourimetry method to determine the uranium concentration in Caspian Sea and Persian Gulf water. Materials and Methods : Laser flourimetric method was used to determine...
background: measurement of back ground concentration of uranium in drinking water is very important for many reasons, specially, for human health. the uranium concentration in drinking water in many counties is a matter of concern for clinical and radioactive poisoning. materials and methods: the uranium concentration in drinking water is determined using laser flourimatric uranium analyzer. fo...
در این مطالعه یک روش ساده و حساس برای تغلیظ مقادیر ناچیز اورانیم و اندازه گیری با دستگاه تزریق در جریان-اسپکتروفوتومتری ارائه شده است. این روش بر اساس تغلیظ پی در پی اورانیم با روش ترکیبی استخراج فاز جامد-میکرواستخراج مایع-مایع پخشی (spe-dllme) می باشد. به این منظور محلول نمونه از روی ستون آلومینای بازی عبور داده شد تا اورانیم و بعضی دیگر از کاتیون ها از ماتریس نمونه جداسازی شود. سپس اورانیم جذ...
چکیده ندارد.
Synopsis The regression effect in ore-reserve estimation has been identified, described and quantified in vein and reef deposits for more than twenty years. Its importance in ‘three-dimensional’ deposits whether underground or open-pit -has been recognized under the alternate guise of the geostatistical volume-variance relationship. The Fontainebleau school has developed the technique of disjun...
South coast of India is known as the high-level background radiation area (HBRA) mainly due to beach sands that contain natural radionuclides as components of the mineral monazite. The rich deposit of monazite is unevenly distributed along the coastal belt of Tamil Nadu and Kerala. An HBRA site that laid in 2×7 m along the sea was found in the beach of Chinnavillai, Tamil Nadu, where the maximu...
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