ABSTRACT
Infrared emission spectra recorded by airborne or satellite spectrometers can be searched for spectral features to determine the composition of rocks on planetary surfaces. Surface materials are identified by detections of characteristic spectral bands. We show how to define whether to accept an observed spectral feature as a detection when the target material is unknown. We also use remotely sensed spectra measured by the Thermal Emission Spectrometer (TES) and the Spatially Enhanced Broadband Array Spectrograph System to illustrate the importance of instrument parameters and surface properties on band detection limits and how the variation in signal-to-noise ratio with wavelength affects the bands that are most detectable for a given instrument. The spectrometer's sampling interval, spectral resolution, signal-to-noise ratio as a function of wavelength, and the sample's surface properties influence whether the instrument can detect a spectral feature exhibited by a material. As an example, in the 6-13-mum wavelength region, massive carbonates exhibit two bands: a very strong, broad feature at ~6.5 mum and a less intense, sharper band at ~11.25 mum. Although the 6.5-mum band is stronger and broader in laboratory-measured spectra, the 11.25-mum band will cause a more detectable feature in TES spectra.
ABSTRACT
Radioimmunoassay (RIA) of prolactin in the prairie deermouse was established and validated. Serum samples were taken from reproductively inhibited animals grown in experimental populations and compared with reproductively capable control animals of both sexes. At the time of assay, serum prolactin concentrations was unaffected by the length of time a control female was exposed to the olfactory stimulation of bedding soiled by her mate or the stage of the estrous cycle as indicated by vaginal cytology. The reproductively inhibited males and females had significantly reduced reproductive organ weights, body weights, and serum prolactin concentrations compared with their respective controls. Also, the relative mean adenohypophysial weight was greater in the inhibited males. Several significant correlations between prolactin and various gravimetric measures are reported for both males and females. Possible relationships between prolactin and other endocrine systems are discussed.
