共查询到14条相似文献,搜索用时 156 毫秒
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采用凝胶渗透色谱法检测反应温度、反应时间和酶液饱和度对裂褶多糖在酶解过程中的分子量及分子量分布的影响.结果表明,内切β-1,3-葡聚糖酶降解裂褶多糖可采用饱和度 80%的酶液,最适反应温度为 50℃,反应时间控制在2 h以内能得到较好的降解效果.利用凝胶渗透色谱法可以有效监控裂褶多糖降解反应程度. 相似文献
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V. M. Bendelow 《Journal of the Institute of Brewing》1975,81(2):127-130
A technique is described for the selection of low extractable non-starch polysaccharide content in early generations of barley breeding programmes. An estimate of extractable β-glucan is obtained from the viscosity of an extract prepared by mashing barley at 50°C in an α-amylase-papain solution. The procedure is calibrated using solutions of known concentration of β-glucan precipitated from barley extract by ethanol. 相似文献
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In an earlier report we proposed a new rapid method based on the measurement of the depression of the freezing point of a solution due to the hydrolysis of lactose. In addition, this report describes the influence of acidification on the accuracy and the reproducibility of this method. 相似文献
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A study was undertaken to further elucidate the functional properties of whey protein with respect to foaming and emulsifying capacities and to observe the effect of enzymatic hydrolysis on these properties. Emulsion capacity decreased as proteolysis continued suggesting there is an optimum mean molecular size of the proteins involved which is lower than that of casein. Heat treatment of the reconstituted protein concentrate was necessary for foam stability; specific volume and foam stability increased directly with temperature of heating. Re effect of pH on whippability, data indicate that the greater the net charge the greater the tendency to foam. A limited amount of hydrolysis appears desirable to increase foaming but greatly decreases foam stability. 相似文献
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酶法水解的亚铁肽微胶囊化的工艺研究 总被引:2,自引:0,他引:2
以麦芽糊精和β-环糊精为壁材,采用超声波法包埋亚铁肽形成微胶囊,通过正交试验研究了微胶囊化过程中的最佳工艺条件。结果表明:用超声波法制备亚铁肽的最佳工艺条件是:芯壁比为1:6,麦芽糊精:β-环糊精为70%:30%,包埋时间为20min,糊精浓度为33%,亚铁肽的包埋率可达80%以上。 相似文献