排序方式: 共有44条查询结果,搜索用时 15 毫秒
41.
J. Purdon Martin 《BMJ (Clinical research ed.)》1946,1(4443):307-308
42.
A rapid method, using octadecasilyl-silica, for the extraction of certain peptides from tissues. 总被引:3,自引:0,他引:3
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Peptides can be recovered from tissues by homogenization in a carefully selected extraction medium followed by adsorption from the supernatant on a small bed of octadecasilyl-silica. Recoveries of corticotropins and somatostatin added to a variety of tissues were quantitative, and the peptides undamaged as determined by high-pressure liquid chromatography. 相似文献
43.
J. Purdon Martin 《BMJ (Clinical research ed.)》1928,1(3520):1058-1061
44.
An operational criterion for the identification and isolation of epithelial-like (E) cells, based on their ability to cover and protect a collagen gel from the action of collagenase, has been developed. The E cells isolated by this collagenase-separation technique (CST) exhibited the ultrastructural features, including desmosomes and abundant tonofilaments, that are considered characteristic of this cell type. Unlike confluent cultures of fibroblast-like (F) cells, E cells were not found to have large external transformation-sensitive (LETS) protein on their surface membranes. The CST provides a nondestructive and efficient means of identifying and isolating E cells from mixed populations. 相似文献