Nonlocal determination of brightness in spatially periodic patterns.
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Humans↗
Biomedical subjects
R V Lange
Publications and source records attributed to R V Lange.
Narrow-band spatial mechanisms in apparent contrast matching.
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Adaptation, Ocular↗
Phase-dependent interaction of widely separated spatial frequencies in pattern discrimination.
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Differential Threshold↗
Influence of exposure duration on the tuning of spatial channels.
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Adaptation, Ocular↗
Response of movement detecting cells in the optic tectum of pigeons to change of wavelength.
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Action Potentials↗
Spatial frequency channels in human vision and the threshold for adaptation.
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Adaptation, Ocular↗
Adapted and unadapted spatial frequency channels in human vision.
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Adaptation, Ocular↗
Composite adaptation and spatial frequency interactions.
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Adaptation, Ocular↗
Molecular interactions and diffusion permeability.
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Binding Sites↗
Cellular inhomogeneity in dog red cells as revealed by sodium flux.
Unidirectional (24)Na fluxes across the dog red blood cell membrane were measured. The kinetics were incompatible with a single time constant but could be accounted for in terms of a two-series compartment cell model, with approximately 1% of cell Na in the outer compartment. Dog red blood cells are known to be inhomogeneous in their Na and K permeabilities. Theoretical analysis showed that such cellular inhomogeneity in the Na permeability coefficient might in principle account for the flux data. In order to evaluate the inhomogeneity effect, a technique based on the differential response of cells suspended in isosmolar high K buffers was devised to measure the variations in Na permeability in the cell population. A variation in the Na permeability coefficient of approximately 30% was found. This inhomogeneity is insufficient to account for the flux data.
Animals↗