麦芽蛋白溶解度与麦汁高分子蛋白的关系

Studies on relationship between Kolbach index of malt and high molecular weight protein in wort

测定了40个不同麦芽样品的蛋白质含量、可溶性氮、库值及高分子蛋白,并对结果进行了相关性分析。结果表明,麦汁中高分子蛋白的含量与麦芽的蛋白质含量呈显著正相关(r=0.659,P<0.01),表明蛋白质含量高的麦芽制得的麦汁中高分子蛋白的量也高。此外,建立了麦汁中高分子蛋白与库值及蛋白质含量的线性回归方程,依据此方程可根据麦芽的库值及蛋白质含量预测麦汁中的高分子蛋白,为从源头上预测和控制啤酒泡沫提供支持。

The protein content,soluble nitrogen,Kolbach index and high molecular weight protein of 40 malts were determined. The results showed that the content of high molecular weight protein in wort was significantly positively correlated with protein content of malt（ r = 0. 659,P 0. 01）. Furthermore,a linear regression equation of high molecular weight protein in wort and Kolbach index and protein content of malts was established. According to the equation,we could predict the high molecular weight protein in wort based on Kolbach index and protein content of malts,and provide foundation for controlling of the foam protein content in beer from the source.