Effect of different drying methods on the quality of silkworm pupae proteins

In this thesis,silkworm pupae proteins(SPP) were used as the material to investigate the effects of spray drying and vacuum freeze drying on the quality. For this purpose,SPP powders were made by two different drying methods to compare their properties and antioxidant activities including reducing activity,radical scavenging activity on DPPH,hydroxyl radical(OH·) and superoxide anion radical(O2-·). Results indicated that spray dried product exhibited a little light color and odor. Samples prepared through spray drying exhibited higher reducing power,DPPH radical scavenging activity and O2-·scavenging activity. However,vacuum freeze dried product possessed better solubility and stronger scavenging activity on hydroxyl radical.And the oil absorption of vacuum freeze dried product was higher than the oil absorption of spray dried product.