The Fortuny dome and the cyclorama became essential tools of the scenic illusionists, but their invention served the anti-illusionists equally well, as they gave a sense of space beyond the finite limits of the stage, gave solidity to the stylized decor, and silhouetted the rhythmic action of the players against a background of diffused light.
MHC tetramers have become essential tools for the analysis of antigen specific responses of CD8+ and CD4+ T cells.
Calorimetric techniques have become essential tools for the characterization of materials such as ceramics, polymers, metals, drugs, foodstuffs as a function of their thermal properties.
Such chromosome maps have become essential tools for linkage analysis of important traits, as well as for genome evolution analysis.
The recent research activities indicate that ATRP and RAFT polymerization have become essential tools for the design and synthesis of advanced, noble and novel gene carriers.
To meet the challenges of a changing environment, product knowledge and product testing become essential tools for selecting suitable additives and DF systems.
According to Newsweek, Apple's iPod touch and iPhone have become essential tools for soldiers in combat.
High-throughput technologies have become essential tools for biological researchers.
Model collagen peptides have become essential tools for collagen research [2 4].
As a complementary tool, computer simulations, particularly the molecular dynamics (MD) simulations and the associated theoretical calculations, can overcome such deficiencies and have therefore become essential tools in the investigation of a wide range of chemical and biological systems (Karplus and Petsko, 1990; Karplus and McCammon, 2002).
