Assertion: hydrogen's effect | /r/Desires | phenomenon
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text: When an excess of parahydrogen is used during hydrogenation reactions (instead of the normal mixture of orthohydrogen to parahydrogen of 3:1), the resultant product exhibits hyperpolarized signals in proton NMR spectra, an effect termed PHIP (Parahydrogen Induced Polarisation) or, equivalently, PASADENA (Parahydrogen And Synthesis Allow Dramatically Enhanced Nuclear Alignment) (named for first recognition of the effect by Bowers and Weitekamp of Caltech),[citation needed] a phenomenon that has been used to study the mechanism of hydrogenation reactions.