rotatory dispersion in a sentence

Examples

1. In a paper published in 1919, Perucca reported an experiment which produced optical rotatory dispersion ( ORD ) as a result of passing chiral as a crystal, but in its natural ( undyed ) state is transparent and does not exhibit enhanced optical activity, so Perucca added an organic dye ( an equilibrium racemic mixture of a triarylmethane textile dye then known as " extra China blue " ).