这可能部分源于分离寡聚物成本高耗时长——从数百公斤干燥的植物样本中可能只能分离得到数毫克的纯品。
This is partly because isolating the oligomers is both costly and time-consuming - processing hundreds of kilograms of dried plant material often yields only a few milligrams of a single product.
利用甲醇、H_2+CO_2或乙酸盐作为碳源和能源，从池塘的沉积物取样，经过反复的富集和分离，得到了甲烷八叠球菌的纯培养物。
Samples from pond sediments were inoculated to obtain the pure culture of Methanosarcina sp. by repeated enriching and isolating. Growth was fasted on H_2+CO_2 or methanol.
采用制备高效液相色谱技术，从杜仲叶提取物中分离纯化得到高纯活性成分绿原酸。
Preparative high performance liquid chromatography (PHPLC) technique was used to separate and purify high purity of chlorogenic acid from Eucommia ulmoides Oliv.
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