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    • Photochromism of o-Nitrotoluenes - Nature

      Nature· 4 days ago

      THE crystals of 2-(2′,4′-dinitrobenzyl)-pyridine (I), which are colourless when kept in the dark, turn blue when exposed to light1. Hardwick, Mosher and ...

    • Societies and Academies - Nature

      Nature· 5 hours ago

      The principal object of the paper is to put forward for consideration a formula, η12 - ηew10 = 4π1 which indicates that the combination coefficient η12 for small ions and large ions of the opposite ...