将ASTA溶解在DMSO溶液中，质量比为1：10，再把PVA加入80℃

Dissolve ASTA in DMSO solution with a mass ratio of 1:10, then add PVA to distilled water at 80°C, stir to form a 5wt% solution, then pour the ASTA solution into the PVA solution, the mass ratio of ASTA and PVA is 5: 90. After stirring evenly, the nuclear spinning solution is obtained.

Dissolve ASTA in DMSO solution with a mass ratio of 1:10, then add PVA to distilled water at 80 ℃ and stir to form a 5wt% solution. Then pour the ASTA solution into the PVA solution with a mass ratio of 5:90 between ASTA and PVA, and stir evenly to obtain the nuclear spinning solution.

Dissolve ASTA in DMSO solution with the mass ratio of 1: 10, then add PVA into distilled water at 80℃ and stir it into 5wt% solution, then pour ASTA solution into PVA solution with the mass ratio of ASTA to PVA of 5: 90, and stir it evenly to prepare nuclear spinning solution.