title: Surface activation of carbon film supports for biological electron microscopy.
abstract: The effect of glow-discharging on naked carbon-filmed grids has been evaluated. The effect of different locations of the grids within a DC discharge, operated in the normal glow, was analyzed by applying various biological specimens to the grids. Two locations were found to give consistent results: (a) in Crookes dark space, particulate specimens, negatively stained, spread evenly--suggesting a new negative surface charge of the support; (b) below the anode, nucleic acids, selectively (positively) stained, appeared as well spread filaments, indicating a net positive surface charge.
mesh_terms: D004247:DNA; D005293:Ferritins; D008854:Microscopy, Electron / Q000295:instrumentation*; D012333:RNA, Messenger; D013048:Specimen Handling / Q000379:methods; D013194:Staining and Labeling; D013499:Surface Properties; D014027:Tobacco Mosaic Virus / Q000032:analysis; D014764:Viral Proteins
chemical_list: D012333:RNA, Messenger; D014764:Viral Proteins; D004247:DNA; D005293:Ferritins