| | 1 | Author
| Hiroko Ito, K. Aran, RhodaElison Hirsch, SeymourSteven Brody | Requires cookie* | | | Title
| Stability and Regeneration of Rhodopsin Absorption Spectra at an Air-Water Interface  | | | | Abstract
| Stability and regenerability of the absorption spectrum of CTAB solubilized rhodopsin at an air-water interface is studied. The spectral properties of rhodopsin films in the dark are stable more than 150 minutes. When rhodopsin is bleached (40 — 50%) and maintained in highly com pressed films recovery of the spectrum is observed. The recovery is 57% to 100% of the pigment present before irradiation. At low surface pressure or if the films are expanded after irradiation there is no observable recovery. | | | |
Reference
| Z. Naturforsch. 33c, 317 (1978); received March 28 1978 | | | |
Published
| 1978 | | | |
Keywords
| Vision, Rhodopsin, Monolayers, Membranes, Photobiology | | | |
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| | | | | TEI-XML for
| default:Reihe_C/33/ZNC-1978-33c-0317.pdf | | | | Identifier
| ZNC-1978-33c-0317 | | | | Volume
| 33 | |
| 2 | Author
| David Dvorak, Allan Snyder | Requires cookie* | | | Title
| The Relationship between Visual Acuity and Illumination in the Fly, Lucilia sericata | | | | Abstract
| The variation in visual acuity with illumination has been studied by monitoring the extracellular response of direction sensitive motion detecting neurons to a drifting sine wave grating displayed upon an oscilloscope spreen. Acuity reaches a maximum value of 0.46 cycles/degree at luminances above 1.0 cd/m2 and decreases gradually over a 3.8 log unit attenuation in intensity to a minimum value of 0.05 cycles/degree. The results have been compared with theoretical acuity curves for the coupound eye with various dark adaptation mechanisms. The analysis indicates that a major strategy of dark adaptation in the fly is a process involving intensity-dependent neural summation of signals from photoreceptors having different visual axes. | | | |
Reference
| Z. Naturforsch. 33c, 139 (1978); received November 9 1977 | | | |
Published
| 1978 | | | |
Keywords
| Diptera, Insect, Vision, Visual Acuity, Electrophysiology | | | |
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| | | | | TEI-XML for
| default:Reihe_C/33/ZNC-1978-33c-0139.pdf | | | | Identifier
| ZNC-1978-33c-0139 | | | | Volume
| 33 | |
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