Levels of trace radiopurity in active detector materials is a subject of major concern in low-background experiments. Among the radio-isotopes, K is one of the most abundant and yet whose signatures are difficult to reject. Procedures were devised to measure trace potassium concentrations in the inorganic salt CsI as well as in organic liquid scintillator (LS) with Accelerator Mass Spectrometry...

This work discusses the influence of different cleaning procedures on p-gallium nitride (GaN) grown sapphire by metal–organic chemical vapor deposition. The cleaned p-GaN surface was transferred into an ultrahigh vacuum chamber and studied X-ray photoelectron spectrometer, revealing that a with so-called “piranha” procedure results in low carbon oxygen concentrations surface. Contrary, solely u...

Mineralogical and chemical evaluations are necessary to investigate the background origins of materials. In terms residues commonly produced around world, ashes biomass stands out for its high calorific capacity use energy production at thermoelectrical facilities. Given current sustainability issues new demands from society, soil pine in Castelo Branco region were investigated research possibl...

Polycyclic aromatic hydrocarbons (PAHs) and metals are contaminants of industrial brownfield soils. Pollutants can have harmful effects on fungi, which major actors soil functioning. Our objective was to highlight fungal selection following long-term contamination Fungal diversity assessed 30 top-soil samples from ten sites gathered in three groups with different levels physico-chemical charact...

foods contaminations with mycotoxin producing fungi is the common problem in production and maintenance of foods leads to production and presence of many types of mycotoxins with extensive clinical effect on human called mycotoxicosis. the aim of this study is to determine humidity percent and fungal contaminations of flour which is used in bakeries of tabriz city. from 89 bakeries that were ba...