Extended Data Fig. 4: Pulse sequence of the GIFTED experiment.
From: Wood cellulose microfibrils have a 24-chain core–shell nanostructure in seed plants

The filled rectangle denotes a \(\pi /2\) pulse. The spin-locking duration (\({\tau }_{{\rm{SL}}}\)) was systematically varied in the range of 0.3 to 20 ms, whereas the CP contact time was fixed at 2 ms.