Nanoparticle in each model can be damage to water quality. This study is about nano metal that damaged its Metal divided layers electrical shock lead dividing of them. In different temperature, Energy and layer, quality measured. Temperature has reverse relation with The best temperature (-20) ˚C. direct effect on water. total investigation all layers, bridging phenomena occurred particle remov...

Bee products can be contaminated from different sources. The contamination can arise from beekeeping practices or from the environment. Environmental contaminants are covered in the first part of the review. They are: the heavy metals lead, cadmium and mercury, radioactive isotopes, organic pollutants, pesticides (insecticides, fungicides, herbicides and bactericides), pathogenic bacteria and g...

The utilization of organochlorine pesticides for pest control chemical has been of great interest on residue contamination from biological organisms in the environment. Green mussel (Perna viridis) samples were monitored as bioindicators for assessment of the water quality in coastal waters along the Gulf of Thailand. Thirty-six samples were collected from 12 stations during 1997-1999 and analy...

Platinum is one of the most common coatings used to optimize mirror reflectivity in soft X-ray beamlines. Normal operation results in optics contamination by carbon-based molecules present in the residual vacuum of the beamlines. The reflectivity reduction induced by a carbon layer at the mirror surface is a major problem in synchrotron radiation sources. A time-dependent photoelectron spectros...

A combination of SEM, AES and angle-resolved XPS (ARXPS) has been applied to analyse the distribution of chemical compounds in the surface region of electrochemically etched molybdenum tips and to determine the contamination layer thickness. Carbon monoxide, graphite, molybdenum carbide and molybdenum oxide were found to be the main surface contaminants on molybdenum tips. Auger line profiling ...

Presidential Decision Directive 63 identified water systems as one of the critical infrastructures to the United States. Following this directive and the passing of The Public Health, Security, and Bioterrorism Preparedness and Response Act there has been increased research effort in both assessing the vulnerability of drinking water systems and proposing protection measures. Drinking water net...

Groundwater and surface water contamination is related to the presence of chemical substances, which strongly influence suitability for human consumption as well industrial agricultural uses [...]