The main interest of this study is to assess whether uranium deposits located in the San Marcos outcrops (NW of Chihuahua City, Mexico) could be considered as a source of U-isotopes in its surrounding environment. Uranium activity concentrations were determined in biota, ground, and surface water by either alpha or liquid scintillation spectrometries. Major ions were analyzed by ICP-OES in surf...

Determination of 241Pu is an essential issue for radiation protection, as it the precursor some nuclides with high radiotoxicity. a low energy beta emitter, which makes its measurement more challenging than that Pu alpha emitters. The most widely used method liquid scintillation counting (LSC). In this method, assessment radiochemical yield done by measuring sample spectrometry before being lix...

four different alkaline earth metal oxides i.e. mgo, cao, sro and bao were used as heterogeneous catalysts for biodiesel production from palm oil. effects of critical process variables i.e. reaction time, methanol to oil ratio and temperature were investigated. the results were then fitted to a historical design to study the analysis of variance (anova), to characterize interactions between var...

The materials, painting techniques and conservation state of the enamelled stain glass Catalan Modernist workshops operating in Barcelona are studied. It is known for its creativity artistic value where textured, flashed, coloured glasses concur. In late 19th century, used a new type ready-to-be-used enamels (lead-zinc borosilicate glass) incorporating pigment particles colourants. Although hum...

The mercury rejected in the water system, from mining operations and lixiviation of soils after deforestation, is considered to be the main contributors to the contamination of the ecosystem in the Amazon Basin. The objectives of the present study were to examine cytogenetic functions in peripheral lymphocytes within a population living on the banks of the Tapajós River with respect to methylme...