干制方法对蛹虫草超微粉营养特征物质及物理特性的影响

Effect of drying methods on nutrient characteristic and physical properties of super micro-milling powder of Cordyceps militaris

以新鲜蛹虫草子实体为原料,分别采用40、60、80℃热风烘干和真空冷冻干燥,研究不同干制方法对蛹虫草营养特征物质及物化特性的影响。结果表明:低温有助于SOD酶活的保存,冻干虫草的SOD酶活为36.73U/mg;80℃高温或24 h以上的长时间的干制均不利于虫草素的保存,60℃烘干和冻干处理24 h虫草的虫草素含量分别为148.84μg/g和143.14μg/g;高温短时的干制方法有利于腺苷的保存,80℃烘干6 h虫草的腺苷含量为592.01μg/g;冻干虫草超微粉的流动性最小,4种干制方法对虫草超微粉的膨润特性均无明显影响。

Effects of different drying methods including 40℃,60℃ and 80℃ hot air-drying and freeze-drying on the content of nutrient and physical properties of Cordyceps militaris fruiting bodies were studied. In conclusion,low temperature drying method is good for SOD enzyme activity,SOD enzyme activity in C. milita by lyophilization was36. 73 U / mg; high temperature（ 80℃） or long time（ 24h） drying process were not favorite to preserve cordycepin.Cordycepin content was 148. 84 μg / g by 60℃ drying and 143. 14μg / g by freeze-drying for 24 hours. High temperature and short time was better for higher adenosine content. Adenosine content was 592. 01μg / g at 80℃ drying for 6hours. Four drying methods had no obvious effect on swelling properties of super micro-milling powder. Lyophilization method had the lowest flow ability.