Tilting, projections and symmetrisation

Further improvements in the form of Jj-noise reduction may also be achieved with additional post-processing. Prior to the tilt procedure, bands of i-noise lie parallel to the/i axis, as for all 

Simulated 2D homonuclear/-resolved and ID spectra for a three-spin proton system at (a) 200 and (b) 600 MHz. The additional artefacts in (a) arise from strong coupling between the two low-frequency protons (no tilting has been applied). 

Spectrum (c) is the conventional ID spectrum displaying shifts and both H- H and couplings. 

Further improvements in the form of tj -noise reduction may also be achieved with additional post-processing. Prior to the tilt procedure, bands of ti-noise will lie parallel to the fi axis, as for all 2D experiments, whilst following the tilt they will sit at 45° to it. In first- and higher-order systems, the multiplets will themselves be symmetrical about the line fi = 0 Hz after tilting [21]. If 

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