Fig. 2.--1. Microspectrograph. 2. Hand-operated indicator. 3, 4. Function transforming unit. 5,
7; 8, 10; 9, 11. Speedomax Xi-Xz-recorder. 6. Multiplying poteutiometer. Transformed …

A microspectrophotometer of increased sensitivity has been constructed to rapidly record
absorption spectra in a single sweep at relatively low light levels from the ultraviolet through …

The experimental and interpretive procedures necessary to obtain ultraviolet absorption
spectra of structures in intact living cells are described. A simplified microspectrophotometer …

Studies in the Department of Human Anatomy, Oxford, on the application of
microrefractometry to living cells included the fungus mycelium. The measurement of the …

A simple, yet rapid and accurate apparatus for cytophotometry is described. It employs rapid
scanning of an object field of 9× 9 µ with a light spot of 0.8 µ in diameter. Light source …

The numerical aperture (NA) of a reflecting objective employed with an infrared
spectrometer determines the minimum size of sample from which spectra may be obtained …

Almost the only means of investigating single tissue cells-without removing them from their
neighbors and injuring them to the point of death-is light. Because many of the cellular …

Some General Problems of Absorption Measurements in the Cell Page 1 1960 IRE
TRANSACTIONS ON MEDICAL ELECTRONICS 119 Some General Problems of Absorption …

The total mass M of substances other than water (the dry mass) in the living cell can be
obtained from the expression M= ϕA/χ, where ϕis the optical path difference (opd) due to the …