大球盖菇漂烫液喷雾干燥精粉贮藏稳定性的研究

对大球盖菇漂烫液喷雾干燥精粉在贮藏期内物理性状、吸湿性和自由基清除性能的变化进行研究.结果表明:贮藏温度越低,大球盖菇漂烫液喷雾干燥精粉对·OH自由基清除率越高,半损失时间也越长,应在低温下储存且不应超过20℃;相同温度下无光照大球盖菇漂烫液喷雾干燥精粉比光照的半损失时间更长,采取措施减少光照有利于延长精粉的贮藏时间,应尽量避光保存;不同湿度下吸湿速率存在差异,相对湿度越高,吸湿性变化越快；不同湿度下的理论包装时间较充足,在相对湿度达到92.31％条件下包装时间长0.34 h,因此防止吸湿回潮是精粉产品贮藏的一个重要问题.试验结果表明,大球盖菇漂烫液喷雾干燥精粉在低温、低湿及避光条件下具有良好的贮藏稳定性.

Studying Storage Stability of Spray Drying Powder from Blanching Water of Stropharia rugoso-annulata

The spray drying powder of blanching water for Stropharia rugoso-annulata falow was studied to understand its changes in physical characteristics,hygroscopicity,free radical scavenging activity during storage period.The results showed that,the lower of storage temperature for spray drying powder,the higher in scavenging efficiency of it for ·OH free radical,and the longer in its half-lost time.The low temperature preservation was suggested for spray drying powder and it should be under the 20℃.With same storage temperature,its half-lost time in darkness was longer than it exposed in light and the higher the relative humidity,the faster the moisture absorption was.According to the difference of moisture content between spray drying powder and packing standard,the release time before packing of the spary drying powder was suggested 0.34 hour even under 92.31% of relative moisture.The results indicated that stropharia rugoso-annulata blanching powder by spray drying revealed a good stability while stored under low temperature、low humidity and dark conditions,especially in avoiding moisture regain during the storage period.