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Wet milling characteristics of corn mutants using modified processes and improving starch yields from high amylose corn
Food and Bioproducts Processing ( IF 4.6 ) Pub Date : 2021-01-09 , DOI: 10.1016/j.fbp.2020.12.015
Pavel Somavat , Wei Liu , Vijay Singh

Yellow dent, high amylose and waxy corn were evaluated using lab-scale conventional, enzymatic (E-milling) and intermittent milling and dynamic steeping (IMDS) processes. The application of proteolytic enzyme (E-milling) and sulfur dioxide (Conventional milling and IMDS process) during kernel hydration and their effects on overall starch yields from three corn types were studied. Despite using lower amount of SO2 (600 ppm) and shorter steeping duration (66.8%), E-milling yielded the highest amount of starch for yellow dent, high amylose and waxy corn (71.4%, 60.1% and 66.9% (db), respectively). The use of proteolytic enzyme during steeping resulted in 26.1% points higher starch yield for high amylose corn. In conventional wet milling process, the highest starch yields were obtained from yellow dent corn and the lowest from high amylose corn, the values being 70.1% and 46.2% (db), respectively. Similarly, highest starch yield (69.5%, db) was obtained from yellow dent corn from the IMDS process. Steepwater absorption for high amylose corn was on average 37.7% greater than the other two corn types for conventional process and 34.6% greater for the modified processes. Modified wet milling protocols with shorter steeping durations and requiring lesser amounts of SO2 can be used to efficiently process different corn mutants.



中文翻译:

使用改进的方法改善玉米突变体的湿磨特性并提高高直链淀粉玉米的淀粉产量

使用实验室规模的常规,酶促(电磨),间歇磨和动态浸渍(IMDS)工艺对黄色凹痕,高直链淀粉和蜡质玉米进行了评估。研究了蛋白水解酶(E-碾磨)和二氧化硫(常规碾磨和IMDS工艺)在籽粒水合过程中的应用以及它们对三种玉米类型淀粉总产量的影响。尽管使用较少量的SO 2(600 ppm)和较短的浸泡时间(66.8%),对于黄色凹痕,高直链淀粉和糯玉米,E-milling产生的淀粉量最高(分别为71.4%,60.1%和66.9%(db))。浸泡期间使用蛋白水解酶可使高直链淀粉玉米的淀粉产量提高26.1%。在传统的湿磨工艺中,最高的淀粉得自黄齿玉米,而最低的得自高直链玉米,分别为70.1%和46.2%(db)。同样,从IMDS工艺的黄色玉米中获得最高的淀粉收率(69.5%,db)。对于传统工艺,高直链淀粉玉米的陡峭吸收率平均比其他两种玉米高37.7%,而对于改良工艺,陡峭吸收率高34.6%。2可用于有效处理不同的玉米突变体。

更新日期:2021-01-13
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