R. L. Richardson

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We have recently developed vetted methods for obtaining quantitative infrared directional-hemispherical reflectance spectra using a commercial integrating sphere. In this paper, the effects of particle size on the spectral properties are analyzed for several samples such as ammonium sulfate, calcium carbonate, and sodium sulfate as well as one organic(More)
Schmidt, Jean M. (State University of Iowa, Iowa City) and Robert L. Richardson. Serology of Bacterionema matruchotii. J. Bacteriol. 83:584-589. 1962.-Serological relationships of Bacterionema matruchotii were studied by means of the complement-fixation reaction. A common complement-fixing antigen was demonstrated in 37 strains of this organism. Serological(More)
A bacterial colony on the surface of a solid medium is regarded as a grouping of cells arranged as a result of physical restrictions imposed by the surface of the medium. It is limited in size by the physical nature of, and changes occurring at, this surface (Knaysi, 1951). In a biological sense the bacterial colony is a macromorphological collection of(More)
A ray-tracing analysis of cat's-eye retroreflectors for use in active open-path Fourier-transform-infrared (OP/FT-IR) spectrometry and the results of testing f/0.5 and f/1.75 cat's-eye retroreflectors built in our laboratory with a commercial active OP/FT-IR spectrometer are presented. The ray-tracing model is based on the optical characteristics of a(More)
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