中文摘要：

研究了干法分离麦麸结构层。首先对小麦麸皮进行微粉碎，通过粒径分析出麦麸粉体的粒径分散性最好的粉碎时间，利用旋振筛对此时的麦麸进行筛分，得到粒径不同的4种麦麸粉体，然后对各个麦麸粉体进行荧光定性和生化标示物定量研究。结果表明，筛分后，外皮层和中间层集中在200目筛上物的麦麸中，约占78．9％，麦麸糊粉层的细胞壁主要集中在200目筛下物和325目筛上物中，比例达41．7％，而小颗粒的麦麸糊粉层细胞内容物则集中在325目筛下物。研究初步表明，通过微粉碎和筛分的方法可以对不同麦麸结构层进行富集，为麦麸的深加工提供了一种简单的干法分离途径。

英文摘要：

In this paper, we studied the dry - process separation of different wheat bran structural layers. After crushing wheat bran into powders, we analyzed the crushing time for the best particle size dispersibility of the powders. After sieving the wheat bran with vibrating sieves we obtained four kinds of wheat bran powders of different partitle sizes and then conducted fluorescent qualitative study and quantitative research of biochemical marker composi- tion for various wheat bran powders. As the results showed, after the sieving, the exodermis and intermediate layers were concentrated in the wheat bran powders on the sieve of 200 mesh with an occupied proportion of 78.9% , aleurone layer cell wall between the sieve of 200 mesh and 325 mesh with the proportion of up to 41.7%, and short grained aleurone layer cellular contents under the sieve of 325 mesh. This study premilinarily indicated that the different layers of wheat bran could be enriched through the methods of crushing and sieving, which provided a simple dry -process sepatation method for wheat bran deep processing.