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- W2025617625 abstract "A technique is described, which is new in certain details, for fracturing frozen cells and taking replicas from the fracture surface. This technique has been developed as a cytological preparative technique complementary to those currently used in electron microscopy. The present paper describes results for human red cells, chosen for preliminary work to facilitate recognition of artifacts. The cells are suspended in 20 per cent glycerol, 0.9 per cent NaCl solution, allowed time to equilibrate, and rapidly frozen in a small chamber plunged into propane at -196 degrees C. The chamber is kept at -196 degrees C., and fractured in vacuo, in such a way that the fracture plane runs through the frozen suspension, and through the cells in its path. After fracture, the chamber is brought to -105 degrees C., still in vacuo, to etch the fracture surface, and a platinum-carbon replica is deposited on the surface from a carbon arc. The replica is subsequently cleaned in concentrated alkaline solution and examined in the electron microscope. The outlines of the fractured cells can be recognised. There are indications that in areas of the replica which correspond to the interior of a cell, individual haemoglobin molecules can be seen, and in favourable cases the arrangement of some of the four molecular subunits." @default.
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- W2025617625 date "1961-04-01" @default.
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- W2025617625 title "ELECTRON MICROSCOPE REPLICAS FROM THE SURFACE OF A FRACTURE THROUGH FROZEN CELLS" @default.
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- W2025617625 doi "https://doi.org/10.1083/jcb.9.4.841" @default.
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