منابع مشابه
Saturation in human cones.
Increment threshold intensities were measured for a foveally presented 20msec test flash which fell on a gashed 4.1” white background field. The test field was varied in color (red or green) and size (1” or 0.57”). In one condition (green 0.57” test) the onset asynchrony of the background and test fields was also varied. The increment threshold measurements directly demonstrate saturation of th...
متن کاملEffect of Different Tapered Gutta Percha Cones in Apical Microleakage of Human Root Canal Obturation
Background and purpose: Gutta-percha is generally accepted as the main canal filler. Standard gutta-percha cones are available in 2-10% tapers. The purpose of this study was to compare apical microleakage of canals obturated with different tapers of gutta-percha, using the protein penetration technique. Materials and methods: In this study, 96 maxillary anterior teeth were selected and were pr...
متن کاملSpectra of human L cones
Variations in the amino acid sequences of the human cone opsins give rise to spectrally variant subtypes of L and M cone pigments even in the population with normal color vision. In vitro mutagenesis studies have shown that a limited number of amino acid substitutions produce shifts in the wavelength sensitivity. Presented here are results comparing electrophysiological measurements of single h...
متن کاملThe ratio of L cones to M cones in the human parafoveal retina.
We present psychophysically-based estimates of the relative numbers of long-wavelength-sensitive (L) and middle-wavelength-sensitive (M) cones in the parafovea of three color-normal trichromats. Using methods previously applied to the fovea centralis, we obtained estimates of the relative numbers of L and M cones at retinal eccentricities of 1.0, 1.5, 2.0, 3.0, and 4.0 deg along the horizontal ...
متن کاملSaturation of the Human Phenome
The phenome is the complete set of phenotypes resulting from genetic variation in populations of an organism. Saturation of a phenome implies the identification and phenotypic description of mutations in all genes in an organism, potentially constrained to those encoding proteins. The human genome is believed to contain 20-25,000 protein coding genes, but only a small fraction of these have doc...
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ژورنال
عنوان ژورنال: Vision Research
سال: 1977
ISSN: 0042-6989
DOI: 10.1016/0042-6989(77)90035-9