豆豉低盐固态发酵过程中部分成分的转化初探

本实验以永川豆豉为阳性对照,对自制豆豉发酵过程中蛋白质、氨基酸、还原糖及亚硝酸盐等主要成分的含量和pH值的变化进行检测,并初步探讨其变化规律。实验结果:在豆豉发酵过程中,蛋白质呈下降趋势;在前发酵过程中,蛋白质最终达10.682%;在后发酵过程中,最终达4.429%。氨基酸含量不断增加,最终达1.233 g/100 g。还原糖含量不断下降,最终达5.286g/100 g。亚硝酸盐含量呈上升趋势,达到1.55μg/g。pH值前期保持不变,后期下降,最终达3.80。

A Research on Components Conversion in Low-salt Solid-fermentation of Fermented Blank Beans

This experiment uses Yongchuan fermented blank beans as the positive control group to test the change in the amount of such main ingredients as protein,amino acid,reducing sugar,nitrite and its pH during the fermentation,and to find out the rules in the change.Results: the protein was reduced to 10.682% at the early stage and to 4.429% at the last stage;the amino acids continuously increased and reached 1.233 g/100 g in the end;the reducing sugar steadily decreased and finally was 5.286 g/100 g;the nitrite increases and in the end it was 1.55 μ g/g;its pH value remained unchanged at the early stage but went down in the last stage and in the end it was 3.80.