The potential effects of extracellular polymeric substances (EPS) on the behavior and toxicity silver nanoparticle (Ag-NPs) sulfide (Ag2S-NPs) remains ambiguous. interaction EPS from Bacillus subtilis with Ag2S-NPs, metallic Ag-NPs, or ionic Ag, associated plant safety had been examined in this study. biological impacts Ag-NPs Ag2S-NPs were Ag form-dependent highly influenced by microbial EPS. ...

A chronological sequence of urban soils 3-92 years old was studied to determine the effects of time on morphogenesis, artifact weathering, and the geochemical partitioning of Pb. Key chronofunctions determined are an increase in ˆA horizon Development Index (defined herein based on soil color) and water-soluble Pb, and a decrease in pH and C/N, with increasing soil age. Key artifact weathering ...