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Arne Engstrom and Bo Lindstrom
The Absorption of Xrays and the Continuous Xray Spectrum
Conditions for Optimum Visual and Photometric Contrast in Xray Microscopic Images
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absorbance acetate alcohol amount antibody antigen aperture autoradiographs Baker-Smith bands beam biochemical biological calcium calculated Caspersson Cell Research chemical compound concentration condenser contrast Cooke-Dyson curve cytochemical Davies Deeley density determined Dimethylformamide distribution DNA content dry mass Engstrom enzyme ethanol exposure Exptl Feulgen microspectrophotometry Feulgen reaction film filter fixation fixed cells illumination incubation indoxyl interference microscope interference pattern Leuchtenberger light intensity material measurements medium mercaptide Mercury Orange method microradiogram microradiography molecules monochromator muscle myofibrils nuclei nucleic acid object obtained optical path difference particles Pelc phase phosphatase phosphate photometric photomultiplier plate Pollister precipitation procedure protein quantitative radiation reagent refractive index resolving power sample sections SH groups slide soluble solution solvent specific specimen sperm heads staining substance substrate sulfhydryl groups sulfhydryl reagent systematic error Table technique thickness thiol tion tissue toluene Trichloroacetic acid ultraviolet wavelength X-ray