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...

The amalgamation of leaf-labelled trees into a single (super)tree that “displays” each of the input trees is an important problem in classification. We discuss various approaches to this problem and show that a simple and well known polynomial-time algorithm can be used to solve this problem whenever the input set of trees contains a minimum size subset that uniquely determines the supertree. O...

Miller has shown that disjunctions are not necessary in a large fragment of hereditary Harrop formulae, a class of formulae which properly includes Horn clauses. In this paper we extend this result to include existential quantiications, so that for each program D, there is a program D 0 which is operationally equivalent, but contains no disjunctions or existential quantiications. We may think o...

A novel semiautomatic dissolved elemental mercury analyzer (DEMA) was developed for investigating dissolved elemental Hg (DEM) in natural waters. This on-line setup couples the main analytical steps from sample introduction, gas-liquid separation, and Au amalgamation/separation to final detection/data acquisition using flow injection techniques. This approach provides ease of operation and high...