Comparison of techniques to localise U-bearing particles in environmental samples

comparison of the amount of debris extruded apically in two rotary techniques: flexmaster and m2

چکیده ندارد.

Natural and anthropogenic U in environmental samples

The interaction of thermal neutrons with U results in fission with a probability of 85% and in the formation of U (t1/2 = 2.3 10 yr) with a probability of 15%. While anthropogenic U is, therefore, present in spent nuclear fuel at levels of U/U up to 10 , the expected natural ratios in the pre-anthropogenic environment range from 10 14 to 10 . At VERA, systematic investigations suggest a detecti...

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

Determination of uranium isotopes in food and environmental samples by different techniques: a comparison.

The uranium concentration in 59 samples of bottled and tap water, mainly from northern Italy, was measured by different techniques. Results obtained by inductively coupled plasma mass spectrometry (ICP-MS), semiconductor alpha spectrometry and low level liquid scintillation counting with alpha/beta discrimination (LSC) have been compared. High resolution gamma spectrometry and semiconductor alp...

Analysis of Surfactants in Environmental Samples by Chromatographic Techniques