PubMed · 5113330
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N R Heckenberg, W I Smith. 1971. Multipass laser interferometry for plasma studies.. https://doi.org/10.1063/1.1685317
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The structure of mitochondria was studied after the irradiation of human lymphocytes with an He-Ne laser (wavelength, 632.8 nm; dose, 56 J m-2). Ultrathin sections of the lymphocytes were studied by electron microscopy 1 h after the irradiation. The irradiation resulted in a 20% increase (p = 0.95) in the number of mitochondrial profiles on the cell section without an increase in their total area. Three-dimensional reconstruction of mitochondria from ultrathin sections trough the whole lymphocyte showed that the number of mitochondria was reduced to 9-12 in the irradiated cells compared with 40-45 in the control cells. In the irradiated lymphocytes, 2-4 giant branching mitochondria were also observed among small discrete mitochondria.
Sensitometric techniques for performing processor quality control in laser imaging systems are analyzed in this study. The sensitivity of conventional x-ray films using simulated screen-light sensitometry is compared with helium-neon (HeNe) laser film exposed with a simulated red-light sensitometer, a standalone (reference) laser sensitometer, an experimental (unstable) laser sensitometer, and laser printers. Infrared (IR) laser film exposed with an IR laser diode and a simulated IR sensitometer are also evaluated. It is demonstrated that laser-generated step tablets provide an easy and reliable method of performing laser film processor quality control.
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