The use of HYPOP material as the polarizing medium will also increase the range of possible applications of d DNP-ZULF NMR as the use of HYPOPs is independent of the solution they host. In addition, faster dissolution and injection have been demonstrated using highlypressurized liquids as propellers for the dissolved sample , allowing for dissolution and transfer in < 2 s. The approach taken by Kouřil et al. reduces the sample-transfer duration even further (70 ms over a 3.2 m distance demonstrated) by pneumatically shuttling the sample in the solid state . These experimental advances should further improve the performance of the d DNP-ZULF experiment.