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Author DeVoe, R. D.
Title Dual Sensitivities of Cells in Wolf Spider Eyes at Ultraviolet and Visible Wavelengths of Light Type Journal Article
Year (up) 1972 Publication Journal of General Physiology Abbreviated Journal JGP
Volume 59 Issue 3 Pages 247-269
Keywords Animals; Adaptation; Animals; Color Perception; Electroretinography; Eye; Eye: radiation effects; Light; Membrane Potentials; Ocular; Ocular Physiological Phenomena; Radiation Effects; Spiders; Spiders: physiology; Ultraviolet Rays
Abstract Intracellular recordings have been made from visual cells in principal and secondary eyes of in vitro wolf spider preparations. The responses of all cells to all wavelengths of light were graded depolarizations; no hyperpolarizations or nerve discharges were seen. Cells in a secondary eye, the anterior lateral eye, had a maximum sensitivity in the visible at 510 nm and a secondary maximum, or shoulder, of sensitivity in the near ultraviolet at 380 nm. Cells in principal eyes, the anterior median eyes, all responded maximally both in the visible at 510 nm and in the ultraviolet at 360-370 nm or less. However, there was no typical ratio of ultraviolet to visible sensitivities; the differences in log sensitivities (log UV/VIS) varied from 3.3 to -0.5. Each principal eye had a population of cells with different ratios. These populations varied with the time of the year, possibly due to changes in light upon the animals. Chromatic adaptations of cells in anterior median (but not anterior lateral) eyes resulted in small, selective changes in spectral sensitivities, and there was some facilitation of responses from cells repeatedly stimulated. It is concluded that cells of secondary eyes contain only a visual pigment absorbing maximally in the visible, while cells of principal eyes probably contain variable amounts of both this pigment and one absorbing in the ultraviolet as well.
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Call Number LoNNe @ kagoburian @ Serial 668
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Author Vriend, Jerry; Lauber, Jean, K
Title Effects of Light Intensity, Wavelength and Quanta on Gonads and Spleen of the Deer Mouse Type Journal Article
Year (up) 1973 Publication Nature Abbreviated Journal
Volume 244 Issue Pages 37-38
Keywords animals; mammals; reprodauction; light spectrum
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Call Number LoNNe @ schroer @ Serial 1607
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Author Scott, R.
Title THE RELATIONSHIP BETWEEN ROAD LIGHTING QUALITY AND ACCIDENT FREQUENCY – TRRL LABORATORY REPORT 929. Type Journal Article
Year (up) 1980 Publication Abbreviated Journal
Volume Issue Pages
Keywords Lighting; quality; accident rate; accident; frequency; luminance; glare; uniformity; urban area; daylight; darkness; surfacing; pedestrian
Abstract many studies have related changes in accident frequency to the presence of street lighting, and a few have examined its variation over a range of lighting quality, as measured by illuminance. this investigation attempts to find which of several measures of lighting (describing quantity – as represented by luminance or illuminance – uniformity and glare) most clearly explain variations in accident frequency. about 100 lit sites, almost all in built-up areas, were measured for lighting quality in dry-road conditions. the lighting variables measured were related to the dark:day ratios of accident frequency for the same sites. the strongest relationship found was that for average road surface luminance: in the range 0.5-2.0 candelas/m2, it is estimated that an increase of 1 cd/m2 is associated with a 35 per cent lower accident ratio. other measures of luminance and illuminance were also found to be related to accident ratio (and to each other), but not as clearly as was average road luminance, which is therefore the preferred explanatory variable. analysis of pedestrian and non-pedestrian accidents separately did not reveal a relationship between the former and lighting quality. in contrast, non-pedestrian accidents showed similar relationships to those for all accidents, with the addition of a possible relationship with overall uniformity of luminance.(a)
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Call Number LoNNe @ kagoburian @ Serial 647
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Author Krause, G. H.; Weis, E.
Title Chlorophyll fluorescence as a tool in plant physiology. II. Interpretation of fluorescence signals. Type Journal Article
Year (up) 1984 Publication Photosynthesis Research Abbreviated Journal
Volume 5 Issue Pages 139–157
Keywords Lighting
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Call Number LoNNe @ kagoburian @ Serial 655
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Author WB Cutler; WM Schleidt; E Friedmann; G Preti; R Stine
Title Lunar influences on the reproductive cycle in women Type Journal Article
Year (up) 1987 Publication Abbreviated Journal Hum Biol
Volume 59 Issue 6 Pages 959-72
Keywords Human Health, moonlight
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Call Number LoNNe @ christopher.kyba @ Serial 1195
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