(1) When achromatic lesions were excluded from the analyses, these differences were not found.
(2) A dose-dependent increase in chromatid lesions, i.e., achromatic lesions, chromatid breaks, chromatid deletions and triradial or quandriradial chromosomal exchange fiqures, was found.
(3) Targets were presented on a low photopic achromatic background, so that the red and green targets differed from the background both in intensity and in wavelength, whereas the achromatic target differed in intensity only.
(4) Stimulus parameters were selected to isolate the chromatic and achromatic systems.
(5) We have examined the contribution of these pathways to achromatic visual capacities by behaviorally testing spatio-temporal vision in monkeys with severe damage to the P beta (medium cell) pathway.
(6) We conclude that, for stimuli of either achromatic or chromatic contrast, peripheral spatial resolution is limited by post-receptoral mechanisms.
(7) Patients with high-tension glaucoma showed significant losses in both chromatic and achromatic sensitivities when compared with low-tension glaucoma patients.
(8) For MWS and LWS cone isolation we used a 15 Hz flickering test light to isolate the achromatic channel, and we modelled the resulting spectral sensitivity functions as a linear sum of LWS and MWS input.
(9) Photopically equivalent achromatic and long-wavelength adapting fields induced comparable increases in flicker ERG amplitude, while scotopically equivalent adapting fields had considerably different effects.
(10) The spectrum of damage observed for both cell types was primarily achromatic lesions affecting one or both chromatids.
(11) Similarities were found between the post-receptoral properties of these achromats and the properties of the isolated blue mechanism of normal vision and also the properties of normal luminance contrast processing in general.
(12) The achromatic epithelial cells (AEC), whose cellular materials remain unstained by several stains, e. g., H.E, PAS, Alcian blue, Orange G Anilin blue and Mucicarmin, are detected in the intestinal mucous epithelium of the Iar: Wistar Imamichi rat from the 19th day of gestation to the 21st day after birth.
(13) This is This is attributed to disturbances of the achromatic apparatus that occur with increasing age.
(14) We measured both the wavelength of the spectral achromatic point over a large range of intensities and yellow-blue hue-cancellation functions over the full spectrum and at several luminance levels in protanopes and deuteranopes.
(15) The present observations provide evidence for a visual pathway in human cortex homologous to the magnocellular pathway in macaque, a pathway involved in processing the low-contrast, achromatic, and moving components of visual stimuli.
(16) As illumination level increased, the ability to discriminate wavelength differences deteriorated for the blue cone monochromats, whereas, for the deutan achromats, wavelength discrimination remained relatively constant even near 100,000 scotopic trolands.
(17) The interocular transfer of low-frequency adaptation in the achromat was 50%, which is the same value obtained at higher frequencies.
(18) Our results can be explained in terms of a low-frequency band that represents the opponent-color response, and a high-frequency band that represents the achromatic response.
(19) As a visual device, it permits easy identification of a set of achromatic fringes that can be seen in any two-beam interferometer when a white-light source is observed through it.
(20) In all patients melanocarcinoma was IV-V degree according to Crark as in 2 women it was pigmented, but in 2 women--achromatic.
Bleach
Definition:
(a.) To make white, or whiter; to remove the color, or stains, from; to blanch; to whiten.
(v. i.) To grow white or lose color; to whiten.
Example Sentences:
(1) The transient was characterized by bleaching in the 550-585-nm regions within 6 ps and recovery in approximately 20 ps.
(2) All recombinants were found to be photochemically active, in that optical bleaching produced a temperature- and lipid chain-length-dependent mixture of species absorbing at 480 and 380 nm.
(3) Lesions in either the ventral subiculum or the anterolateral part of the amygdalohippocampal area caused bleaching in the ventromedial hypothalamic nucleus.
(4) All are satisfied by [Formula: see text], where N is the size of rod signal, constant for threshold; theta, theta(D) are steady backgrounds of light and receptor noise; varphi is the threshold flash with sigma a constant of about 2.5 log td sec; B the fraction of pigment in the bleached state.
(5) A simple method for distinction between RNA- and DNA-containing structures in aldehyde- and osmiumtextroxide-fixed electron microscopic autoradiographs (or ordinary thin sections) is described: the developer and the acetic acid used for processing autoradiographs extract selectively uranium acetate from DNA containing-structures which, after staining with lead citrate, leads to a characteristically 'bleached' appearance of the DNA.
(6) Sulphite bleached the flavin of cellobiose oxidase, but gave no reaction with the 31 kDa haem protein, suggesting an absence of flavin.
(7) A new, terrible curse that comes on top of the bleaching, the battering, the poisoning and the pollution.
(8) We have tried to discover whether bleaching raises the threshold by desensitizing the rods, or (like backgrounds) by attenuating their signals.
(9) Additionally, reconstitution of a distinct absorption band, centered around 540 nm, was achieved by addition of exogenous 9-cis-retinal to bleached, isolated eyespot apparatuses.
(10) But the Guardian can now reveal Australia will also need to report on how it is dealing with the current bleaching, where almost a quarter of the coral on the reef has been killed.
(11) Measurements were made of the time course and amplitude of the change in real part of admittance, DeltaG, of a suspension of frog rod outer segments, following a flash of light bleaching about 1% of the rhodopsin content of the rods.
(12) Concentration gradients of metarhodopsin along the lengths of microvilli were produced by local bleaches, accomplished by irradiation with small spots of orange light at pH 9 in the presence of glutaraldehyde or formaldehyde.
(13) Bleaching a few per cent of the rhodopsin molecules of a rod suspension induces a 60% decrease achieved in less than 12 sec.
(14) Consequently, the rate of the bleaching is strongly dependent on the permeability of the thylakoid to the available anion.
(15) Incidentally, it’s the algae that give the coral its colour; and so when it’s ejected, the coral takes on a ghostly white hue, giving rise to the term “bleaching”.
(16) A suggested method for internal bleaching and restoring the access cavity is presented.
(17) Rod outer segment membranes and reassociated stripped disc membrane samples containing divalent cations showed similar phosphodiesterase activities in response to low fractional rhodopsin bleaches (e.g.
(18) Facebook Twitter Pinterest Coral bleaching on the Great Barrier Reef worse than for decades The photos were taken from around Lizard Island by Lyle Vale from Coral Watch at the University of Queensland .
(19) The permethylated rhodopsin thus formed is active toward bleaching, regeneration with 11-cis-retinal, and the activation of the GTPase (G protein) when photolyzed.
(20) When the acyl-CoA dehydrogenases were reacted with moderate excesses of acyl-CoA substrates in D2O in the absence of an electron acceptor, maximum bleaching of the FAD absorbance and the appearance of the long wavelength absorbance, attributed to a charge transfer complex, were observed.