Coal maceral concentrates of high purity were prepared from four different rank coals by Density Gradient Centrifugation method.
经等密度梯度离心分离，从褐煤、长焰煤、气煤和贫煤四种不同变质程度煤中获得了高纯度的有机显微组分。
The purity of Human embryonic MSC which isolated by density gradient centrifugation and cultured by MEM culture medium in vitro is high. The activity of MSC is good.
用密度梯度离心法分离后MEM培养基体外培养的人胚胎msc纯度高，生物活性好。
When the aqueous solvent (solvent a) is cleaned up in terms of an on-line precolumn, the purity of the organic solvent (solvent b) can be tested according to the chromatogram of the blank gradient.
当含水溶剂通过预柱在线净化后，根据空白梯度色谱图可测试有机溶剂的纯度。
Results: the increase in purity of mitochondria was found to be 12 times by density gradient centrifugation. Mitochondrial proteins were displayed well in the 2 -...
结果：通过标志酶活力的监测，梯度离心后线粒体纯提高近12倍，线粒体蛋白质在双向凝胶电泳中得到很好的显现。
Results: the increase in purity of mitochondria was found to be 12 times by density gradient centrifugation. Mitochondrial proteins were displayed well in the 2 -...
结果：通过标志酶活力的监测，梯度离心后线粒体纯提高近12倍，线粒体蛋白质在双向凝胶电泳中得到很好的显现。
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