منابع مشابه
Assessment of radiological hazards of travertine rocks as building materials
Introduction: Although travertine is now widely used as a building material, the effects of its radiological hazards to public health should be a matter of concern. Therefore, this study aimed to determine its radiological parameters with regard to human health. Material and Methods: In this research 10 travertine samples were collected ...
متن کاملEstimating radiation dose from building materials
Background: Natural radioactivity in materials under certain conditions can reach the hazardous radiological levels. So, it becomes necessary to study the natural radioactivity in different materials to assess the dose for the population in order to know the health risks and to have a baseline for future changes in the environmental radioactivity due to human activities. Materials and ...
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Aib α-Aminoisobutyric acid or Cα-methylalanine (αMe)Phe Cα-methylphenylalanine (αMe)Val Cα-methylvaline BOP (Benzotriazol-1-yloxy)tris(dimethylamino)phosphonium CIP 2-Chloro-1,3-dimethylimidazolidium phosphate Db z g Cα,α-dibenzylglycine Deg Cα,α-diethylglycine Dφg Cα,α-diphenylglycine Dp n g Cα,α-di-n-propylglycine EDC 1-(3-Dimethylamino)propyl-3-ethylcarbodiimide HATU 2-(1H-7-aza-1,2,3-benzot...
متن کاملTerahertz characterisation of building materials
To obtain realistic models for propagation channels in future picocellular indoor terahertz communication systems it is necessary to know the reflective properties of building materials found in a typical office environment. The angular dependent reflection coefficients of different building materials were determined using terahertz timedomain spectroscopy in transmission geometry and Fresnel’s...
متن کاملSurface Chemistry in Nanoscale Materials
Although surfaces or, more precisely, the surface atomic and electronic structure, determine the way materials interact with their environment, the influence of surface chemistry on the bulk of the material is generally considered to be small. However, in the case of high surface area materials such as nanoporous solids, surface properties can start to dominate the overall material behavior. Th...
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ژورنال
عنوان ژورنال: Nature
سال: 1937
ISSN: 0028-0836,1476-4687
DOI: 10.1038/140607a0