نتایج جستجو برای: heavy elements
تعداد نتایج: 395349 فیلتر نتایج به سال:
this study was conducted in assaluyeh region, southwest of iran to show utilization and efficiency of sequential extraction analysis in environmental impact studies using soil and related regolith materials as sample media. in order to investigate distribution of heavy metals, optimized bcr (community bureau of reference) sequential extraction analysis method was used. in this caseeight represe...
Monte Carlo calculation of shielding parameters for fast neutrons in newly developed heavy concretes
Introduction: The role of radiotherapy as a part of cancer management increases every year around the world. Thus, Radiation protection in the design of radiotherapy rooms are of great importance. Materials and Methods: In present study using Monte Carlo method, MCNPX code, fourteen types of developed high density concretes with densities ranging from 2.45 ...
The aim of this project is the investigation of atomic and nuclear properties of heavy elements with charge numbers Z 100 by laser spectroscopy. Any atomic spectroscopy, even with the most sensitive laser methods, is seriously hampered by the fact that no information on the atomic structure is available for these elements. To get acquainted with such a spectroscopy experiments were performed fo...
Lattice results for heavy light matrix elements are reviewed and some of their implications are very briefly discussed [1]. Despite the fact that in most cases the lattice results for weak matrix elements at the moment have only a modest accuracy of about 20–30% they already have important phenomenological repercussions; e.g. for Vtd/Vts, xs/xd and B → K ∗γ. I. As samples of “new” projects, I b...
Background and purpose: Excessive intake of heavy metals has adverse health effects and smoking is one of the sources of these elements. The aim of this study was to investigate the concentrations of 11 heavy metals in tobacco of different widely-consumed brands of cigarettes and hookahs in Iran. Materials and methods: Concentrations of nine types of cigarettes and four types of hookah tobacc...
this study was mainly designed to investigate and identify the amounts and types of heavy metals in the soils of national iranian oil refining & distribution company in shahrood region and tried to establish a logical relation between the presence of heavy metals and their damage on vegetation. in addition, considering the power of drained soil and due to the proximity of ground water in shahro...
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