脉冲强光处理对香菇中维生素D_2含量的影响

Effects of Intense Pulsed Light Treatment on Vitamin D_2 Content of Lentinus edodes

为探索脉冲强光处理在食用菌加工中的应用,本文研究了不同能量的脉冲强光照射和样品处理方式对香菇中维生素D_2含量的影响。实验表明,脉冲强光处理可促进香菇麦角固醇向维生素D_2转化,且效果优于紫外线;香菇切片处理可大大提高麦角固醇的转化率,且随脉冲强光照射能量和时间的增加,麦角固醇向维生素D_2转化效果提高;而干燥方式对脉冲强光处理的鲜香菇维生素D_2含量影响相对较小。此外,脉冲强光和紫外处理没有引起香菇中甲醛含量的增加,且对食品中主要营养成分影响不大,香菇中总糖、还原糖和维生素C的含量略有增加。该结果表明,与紫外线处理相比,脉冲强光处理可以更高效的提高食用菌中维生素D_2含量,在改善食用菌的营养品质方面具有良好的应用前景。

In order to explore the application of intense pulsed light treatment in edible fungi processing,the effects of different intense pulsed light energy and sample treatment methods on vitamin D2 content of Lentinus edodes were studied. The results showed that comparing with the ultraviolet radiation,the transformation rate of ergosterol to vitamin D2 was greatly improved by intense pulsed light treatment.Slicing could greatly improve the conversion rate of ergosterol.Comparatively,the drying method had less influence on vitamin D_2 content in fresh Lentinus edodes treated by pulsed light. In addition,intense pulsed light and UV treatment did not increase the content of formaldehyde in Lentinus edodes.It had little influence on its main nutrients,the content of total sugar,reducing sugar and vitamin C increased slightly.The results indicated that compared with the ultraviolet treatment,intense pulsed light treatment was a more efficient way to improve vitamin D2 content of edible fungi. It had a good application prospect in increasing the nutritional quality of edible fungi.