INFLUENCE OF 60Co γ IRRADIATION PRE-TREATMENT ON CHARACTERISTICS OF HOT AIR DRYING SWEET POTATO SLICES COMPARATIVE STUDIES ON THE PERMEABILITY BETWEEN THE SOLVENT- EXCHANGED AND THE AIR-DRIED WOOD STUDIES ON THE EFFECT OF THREE DIFFERENT TREATMENTS ON WOOD PERMEABILITY Comparison of sulfur fumigation processing and direct hot air heating technology on puerarin contents and efficacy of Puerariae Thomsonii Radix Changes of iron oxides and phosphorus adsorption-desorption in paddy soils under alternating flooded and dried conditions Optimizing Deactivation and Drying Process for Pleurotus eryngii Chip