Cenozoic mantle-derived magmas are widespread on the Tibetan Plateau, and provide evidence for evolution of deep mantle its influence Plateau development. Miocene basalts in Maguan area southeastern have high MgO (9.13–13.10 wt%) Mg# (0.60–0.70) with Ce/Pb (10.6–32.5) Nb/U (43.7–52.9) ratios, similar to those oceanic basalts. Distinct from Eocene-Oligocene potassic Western Yunnan basic volcanic...

Cesium radioactive isotopes (134Cs and 137Cs) are dangerous to human health due to their long half-life and high solubility in water. Nuclear experiments, wars, and nuclear plant accidents have been the main sources of Cs release into the environment. In recent years, several methods have been introduced for the elimination of Cs radioactive isotopes from contaminated wate...

background: the present research has focused on the effect of radioactivity on drinking water from five sites in the region of zahedan city. materials and methods: the measurement of water activity in wells, river and spring has been used as a screening method. the determination of gamma emitters was performed by use the application of gamma spectrometry. results: the values of radium concentra...

The lower structural levels of the Variscan orogen exposed in Eastern Pyrenees reveal three genetically associated magmatic suites: (i) a batholitic sized calc-alkaline granitoid (Sant Llorenç – La Jonquera, SL–LJ); (ii) minor mafic intrusions with local ultramafic cumulates (Ceret and Mas Claret complexes); (iii) peraluminous leucogranite bodies. These suites were emplaced syn- to post-collisi...

The Pampean loess is the most extensive continental paleo-record of aeolian material in Southern Hemisphere, recording deposition dust transported by two major zonal wind systems: southern westerly winds and subtropical jets. In order to increase understanding on paleo-atmospheric circulation over we evaluate provenance through REE, Nd, Sr Pb isotopes three sections deposited during late Pleist...

A Smarandache quasigroup(loop) is shown to be universal if all its f, g-principal isotopes are Smarandache f, g-principal isotopes. Also, weak Smarandache loops of Bol-Moufang type such as Smarandache: left(right) Bol, Moufang and extra loops are shown to be universal if all their f, g-principal isotopes are Smarandache f, gprincipal isotopes. Conversely, it is shown that if these weak Smaranda...

The application of stable isotope analysis (SIA) has become a standard scientific approach in Agricultural and Ecological researches and, more in general, in several disciplines such as biology, botany, zoology, organic chemistry, climatology, and nutrition. The main objectives of this paper are (1) to provide a simple definition of stable isotopes and (2) to illustrate analytical measurement m...

a detailed study of ostracoda changes against the stable isotopes of carbon and oxygen acrossthe cenomanian-turonian boundary mass extinction has been fully documented in one section, the south ofengland. this section comprises the uppermost cenomanian to lowermost turonian strata. the comparisonbetween the results obtained in this research and two rival models for the cenomanian-turonian bound...

pb-zn deposits in the kurdistan region, northern iraq, have occurred mainly as a stratabound and open-space filling ore bodies. they are hosted by dolostone and dolomitic-limestone of platform carbonates. the ore deposits at the studied dure and lefan areas are respectively hosted by kurra chine (upper triassic) and bekhme (upper cretaceous) formations. pyrite, sphalerite and galena are the maj...

Objective: PET isotopes are being used more commonly in nuclear medicine. This paper introduces the nuclear medicine technologist to the use of PET imaging. The major focus of this article is on the isotopes that are used in this modality and how they differ from traditional isotopes. The nuclear medicine technologist will become familiar with PET isotopes by reading about PET history, the prod...