Dendritic macromolecules have attracted considerable attention during the past decade because of their unique properties, such as low viscosity, high solubility and a high degree of functionality, ...

As organisms increased in size and complexity, tubular systems evolved to transport substances into and out of the body with maximum efficiency. Although the final structure of tubular organs is ...

The Federal Government is composed of three distinct branches: legislative, executive, and judicial, whose powers are vested by the U.S. Constitution in the Congress, the President, and the Federal ...