 The most important example in organic chemistry is observation of 13C while decoupling 1H, which also saturates the 1J resonances.The value of "γ"S/"γ"I is close to 4, which gives a maximum NOE enhancement of 200% yielding resonances 3 times as strong as they would be without NOE.In many cases, carbon atoms have an attached proton, which causes the relaxation to be dominated by dipolar relaxation and the NOE to be near maximum.