Electronic Quantitation of Light Absorption and Nuclear Fluorescence in Living Cells

Fiber Formation from Solutions of Collagen. IV. On the Role of the Basic Amino Acid Residues*

“…Density tracings along the length of the segmented long-spaced form were obtained by lineselected oscillography (Loeser and Berkley, 1954). Briefly, the electron microscope plates were mounted on a light microscope, which was illuminated from a monochromatic source.…”

Instrumental Estimation of Bacterial Population by Fluorescence Microscopy1

“…Several publications have been presented during recent years describing the application of various scanning devices for automatic counting or differentiation of cells stained with fluorochromes (Mellors and Silver, 1951;Mellors, Glassman, and Papanicolaou, 1952;and Loeser and Berkley, 1954). Most of these publications describe studies performed on cells obtained from tissue sections or on cancer cells derived from the secretions of certain anatomic sites.…”