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Showing 1 to 20 of 34 for “"Spectral sensitivity"”.
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Determination of spectral sensitivity of a vacuum ultraviolet, grazing incidence spectrograph
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1997, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Spectral Sensitivity of the Goldfish ERG and Optic Tectum Before and After Optic Nerve Damage
… and termination to various wavelengths of light. Spectral sensitivity functions were derived from both the ON- and OFF-components at both visual levels. By examining the spectral sensitivity functions of these responses, it was possible to determine if there were differences in shape and absolute …
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The Spectral Sensitivity of The Greenhouse Whitefly, Trialeurodes Vaporariorum (Westwood), and Its Biological Significance in Host Selection
Made available in DSpace on 2014-12-11T18:05:43Z (GMT). No. of bitstreams: 1 7317660.pdf: 5909742 bytes, checksum: 1de6ad2e74f7f56d471a3f5d8dc0ba76 (MD5) Previous issue date: 1973
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The Effect of Gonadotropin Releasing Hormone on Opsin Gene Expression and Spectral Sensitivity in Zebra Cichlid Fish (Metriaclima zebra).
… and endocrinological factors. The diversity in spectral sensitivity of cichlids has been partially attributed to differences in opsin gene expression, with each species preferentially expressing a subset of seven possible genes. Hormones such as gonadotropin releasing hormone (GnRH) can mediate …
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Determination of Chromatic and Luminance Channels in the Zebrafish Visual System Using an Increment Threshold Technique
… adaptation. From the ERG b-wave responses, a spectral sensitivity function was derived under low and high levels of white background. By examining spectral sensitivity functions under these two levels of white background adaptation, it was possible to determine if two functional channels exist …
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Temporal Characteristics of Zebrafish Cone Types and Their Role in Separate Visual Processing
… is a basic requirement of vertebrate vision. The spectral sensitivity functions (relative sensitivity to different wavelengths of light) of the separate mechanisms were determined in zebrafish using heterochromatic flicker photometry (HFP). The spectral sensitivity function of the luminance …
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Visual Opsin Diversity in Anurans
… variable sites, as such variation can shift the spectral sensitivity of visual pigments and thus alter dim-light and color vision. Some of the amino acid changes observed are known to tune spectral sensitivity in other vertebrates, and tests for positive selection revealed additional candidate …
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Analysis of Zebrafish Optic Tectum Visual Processing Before and After Optic Nerve Crush
… compare them to previous electroretinogram (ERG) spectral sensitivity data (Bilotta & Harrison, 1999). The second purpose of this study was to examine neural regeneration in the adult zebrafish at various times post-crush and to compare visual processing of these subjects to the normal subjects. …
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INFRARED PRESENSITIZATION PHOTOGRAPHY.
… into the behavior of the characteristic and spectral sensitivity curves of film within the context of the IRPP phenomenon. The temperature rise experienced by the film during this process is determined. The influence of sensitizing dyes and ionic population increases in the grain crystals is …
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Thermomechanical sensitivity of microcantilever in the mid-infrared spectral region
This paper reports the thermomechanical sensitivity of bimaterial cantilevers over a mid-infrared (IR) spectral range (5-10 µm) that is critical both for chemical analysis via vibrational spectroscopy and for direct thermal detection in the 300-700 K range. Mechanical bending sensitivity and noise …
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Possum magic : exploring colour vision in the common brushtail possum (Trichosurus vulpecula)
… I firstly present a detailed analysis of the spectral transmission of light through the ocular media. Here, I demonstrated the variability of ocular media for three marsupial species: the ultraviolet light sensitive fat-tailed dunnart (Sminthopsis crassicaudata), non-ultraviolet light …
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Possum magic : exploring colour vision in the common brushtail possum (Trichosurus vulpecula)
… I firstly present a detailed analysis of the spectral transmission of light through the ocular media. Here, I demonstrated the variability of ocular media for three marsupial species: the ultraviolet light sensitive fat-tailed dunnart (Sminthopsis crassicaudata), non-ultraviolet light …
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Device for selecting lightwave ranges via computer control for studying building material properties via goniophotometer
… wavelengths related to the red, green, and blue sensitivity peaks of a visible detection camera and the pixel response for a near-infrared camera. This filter device functions in conjunction with the Department of Architecture's Daylighting Laboratory goniophotometer to profile the complete …
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Characterization and optimization of supercritical fluid chromatography with on-line Fourier transform infrared detection
… Also, parameters for the optimization of spectral sensitivity, such as mobile phase transparency and flow cell design, are discussed. Demonstrations are made via model mixture separations. Finally, the application of this technique to the analysis of free fatty acids is presented. …
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Molecular Solvation in Phosphonium Ionic Liquids
… prototypical fluorescent molecule known for its spectral sensitivity when in solution making it ideal for these studies. Neat trihexyltetradecyl phosphonium chloride (PIL-Cl) and methanol (MeOH) solvents were used to form an array of PIL-Cl mixtures spanning the complete range of mol fraction, in …
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The Techniques and Material Aesthetics of the Daguerreotype
… related to improvements in speed, tone and spectral sensitivity, which were the prime motivation for advancements. Chapters are devoted to the silver plate, iodine sensitizing, halogen acceleration, and optics and their contribution toward image quality is revealed. The evolution of the lens …
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The influence of ploidy level on the hearing sensitivity of the sister species Hyla chrysoscelis and Hyla versicolor
… to identify differences in the tuning and sensitivity of hearing between these two species. Performance was measured as vibration of eardrums, distortions by hair cells in the inner ears, and electrical activity in an auditory nucleus of the brain. All morphological features were slightly …
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SPECTROSCOPIC STUDIES OF NUCLEAR SPINS POLARIZED VIA SPIN EXCHANGE OPTICAL PUMPING AND DYNAMIC COUPLING IN CRYPTOPHANE HOST-GUEST COMPLEXES
… in solution. However, despite NMR's excellent spectral sensitivity, most NMR methods suffer from low detection sensitivity. This low detection sensitivity results largely from extremely small (Boltzmann) nuclear spin polarization at thermal equilibrium--in even the strongest of magnets. This …
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Advances in Instrumentation for Dynamic Nuclear Polarization & Magic-Angle Spinning NMR
… (DNP) is an invaluable tool for increasing the sensitivity of magic angle spinning (MAS) nuclear magnetic resonance (NMR) experiments. Historically, one of the primary drawbacks of DNP has been limited spectral resolution. The resolution of DNP spectra can be substantially improved via data …
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