Subjects working in or living near informal gold mining and processing in southern Peru were studied to determine mercury exposures from two tasks: amalgamation and amalgam smelting. The authors collected 17 airborne and 41 urinary mercury levels. The mean urinary levels were 728 (range: 321-1662) and 113 (45-197) microg/L for working in smelters and living near smelters, respectively. A third ...

Let K be a class of algebras. A0 ∈ K is in the amalgamation base of K, briefly A0 ∈ APbase(K), if for all A1,A2 ∈ K and monomorphisms i1 : A0 → A1 i2 : A0 → A2 there exist D ∈ K and monomorphisms m1 : A1 → D and m2 : A2 → D such that m1 ◦ i1 = m2 ◦ i2. CAα stands for the class of cylindric algebras of dimension α. We determine the amalgamation base for the class of representable CAα’s (RCAα). W...

This review paper deals with the basic aspects and advancement of Nanotechnology its varied applications in every possible field starting from biotechnology, pharmaceuticals, drug science energy related sectors so on. They show some explicit properties like strength, electrical, optical chemical properties. Nanoparticles increment plant productivity by showing direct interactions plants or indi...