共查询到20条相似文献,搜索用时 53 毫秒
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离子交换法分离纯化甘露低聚糖 总被引:2,自引:0,他引:2
采用离子交换树脂法分离纯化甘露低聚糖,由实验得到最佳分离条件为进样量为10 mL、柱高为600 mm、流速为2 mL/min、温度为60 ℃,在此条件下甘露低聚糖的纯度为68.4%. 相似文献
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本研究采用黑曲霉固体发酵法制备的酶制剂降解麦麸,以酶解液为原料,采用D201#大孔树脂对阿魏酸进行分离提纯,探讨了上柱工艺条件和洗脱条件对离子交换的影响,确定最适离子交换操作工艺:室温下,料液阿魏酸浓度在2000mg/l~3000mg/l之间,pH值为9.0,上柱流速为1ml/min;洗脱剂配比(V/V)为无水乙醇:水:盐酸=60:36:4,洗脱流速为1ml/min。在该操作工艺条件下,阿魏酸收率达97%以上,且经过薄层层析法验证纯度大大提高。 相似文献
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为了提高酶解产物中具有特定聚合度的直链麦芽低聚糖组分的含量,分别探究了膜分离、活性炭吸附、葡聚糖凝胶柱层析和不同离子交换树脂等分离技术对直链麦芽低聚糖组分含量的影响。结果显示,膜分离、活性炭吸附、葡聚糖凝胶柱层析、钠型/钙型离子交换树脂层析等技术均不适合直链麦芽低聚糖组分的连续化分离操作;相比而言,钾型离子交换树脂层析分离的效果较好,相比于初始酶解液,分离产物中目标组分G3~G6和G5+G6的比例分别提高了39.53%和8.13%,回收率分别达到78.11%和63.89%。在此基础上,以钾型离子交换树脂为固定相吸附剂,利用模拟移动床可进一步提高终产物中G3~G6和G5+G6的比例和回收率。 相似文献
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B. Holland 《Journal of dairy science》2010,93(3):893-900
The aim of this work was to improve an existing method to separate and quantify the 4 major caseins from milk samples (i.e., containing whey proteins) using ion-exchange chromatography. The separation process was carried out using a mini-preparative cation exchange column (1 or 5 mL of column volume), using urea acetate as elution buffer at pH 3.5 with a NaCl gradient. All 4 major caseins were separated, and the purity of each peak was assessed using sodium dodecyl sulfate-PAGE. Purified casein fractions were also added to raw milk to confirm their elution volumes. The quantification was carried out using purified caseins in buffer as well as added directly to fresh skim milk. This method can also be employed to determine the decrease in κ-casein and the release of the casein-macropeptide during enzymatic hydrolysis using rennet. In this case, the main advantage of using this method is the lack of organic solvents compared with the conventional method for separation of macropeptide (using reversed phase HPLC). 相似文献
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Deacidification of passion fruit juice by a combination of ultrafiltration (UF) and ion-exchange was studied. Prefiltering the juice by UF facilitated the ion-exchange process. At a feed rate of 700 ml h−1 , weakly basic resins removed nearly 95, 80 and 50% titrat-able acids from five, seven and twelve bed volumes of UF permeate, respectively, and did not cause significant sugar losses. UF retentate can be added back to the deacidified UF permeate to restore the suspended solids and some flavour components. 相似文献
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S. Vibhakar J. V. Prabhakar H. C. Bhatnagar 《Journal of the science of food and agriculture》1966,17(11):488-490
Studies on the clarification (prevention of argol precipitation) and deacidification of grape juice using locally prepared ion-exchange resins are reported. The process consists of passing the juice through a cation-exchange column followed by deacidification to the desired level in an anion-exchange column. The loss of minerals attended by cation-exchange treatment could be made up by limiting the ion exchange or by blending the ion-exchange-treated juice with the fresh juice so that the potassium content of the juice is nearly 100 mg-%. The juice thus obtained compared favourably with the conventionally clarified juice with respect to clarity, organoleptic quality and chemical composition. 相似文献
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选用5种强酸性阳离子树脂:树脂BK001、树脂S-9、树脂ZGC108、树脂D001和树脂001×7对糖蜜酒精废液中的K^+的吸附性能进行研究。静态吸附、等温吸附及吸附和洗脱的动力学研究显示,树脂BK001和树脂ZGC108适合糖蜜酒精废液的K^+的分离。本研究提供一种新的K^+提取来源,为有效利用糖蜜酒精工业废弃物及实现提K^+的工业化生产提供基础理论依据。 相似文献
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采用超滤、纳滤操作对酵母抽提物进行处理,结果表明:操作压力、操作时间及料液体积流量对超滤有很大影响,所选MWCO为5000的膜件可去除96%以上的大分子蛋白质,起到纳滤预处理作用.采用MWCO为300的纳滤膜对超滤液进行浓缩纯化,海藻糖总提取率高达85.6%,大大高于传统方法.操作条件如进料压力、浓缩倍数及操作方式对纳滤过程均有很大影响。 相似文献
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