Tartu plastic space–filling atomic–molecular models

New plastic atomic–molecular models have been designed, which enable to exactly imitate the structure and conformational changes of micro–and macro–molecules including polymers. These models have improved parameters, a handy nomenclature of units and an extreme firmness of linking connectors. They allow to measure and adjust dihedral (torsional) angles and atomic co–ordinates of the molecular chains. The scale is 1 cm = 1A(0.10 nm).