对采用纳滤技术生产高纯度低聚果糖进行了研究。
The nano filtration technique to produce high - purity fructo oligosaccharide is investigated.
传统的金属镁热还原法制取的硼粉纯度低，含有大量的镁、氧等杂质。
The boron powder prepared by traditional heating reduction with magnesium is lower in purity and contains high impurities, such as Mg, o.
大豆分离蛋白的碱浸提酸沉淀工艺，目前普遍存在成品得率低，纯度低的问题。
The major problems such as low recovery ratio of protein, low yield and purity of finished products are found in the process of isolation soy protein by alkali extraction and acid precipitation.
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