Analogous to protans, the two types of deutan color-defectives-the dichromats (deuteranopes) and the anomalous trichromats (deuteranomalous)-do not differ in spectral sensitivity in the red-green range at threshold (either in the dark or against bright colored backgrounds). However, luminosity curves obtained by heterochromatic brightness matching show the latter to be slightly more sensitive i...

Lower vertebrates can detect UV light with the pineal complex independently of eyes. Electrophysiological studies, together with chromophore extraction analysis, have suggested that the underlying pigment in the lamprey pineal exhibits a bistable nature, that is, reversible photoreaction by UV and visible light, which is never achieved by known UV pigments. Here we addressed the molecular ident...

The chicken retina contains rhodopsin (a rod visual pigment) and four kinds of cone visual pigments. The primary structures of chicken red (iodopsin) and rhodopsin have been determined previously. Here we report isolation of three cDNA clones encoding additional pigments from a chicken retinal cDNA library. Based on the partial amino acid sequences of the purified chicken visual pigments togeth...

Phytochrome has been isolated from the green alga Mesotaenium and the liverwort Sphaerocarpos. The Mesotaenium pigment had absorption peaks at 649 and 710 nm for the P(R) and P(FR) forms, respectively. Corresponding difference spectrum maxima for the Sphaerocarpos pigment were at 655 and 720 nm. While the absorption maxima differ, the reversibility and efficiency with which red and far-red ligh...

In this paper, preparation of SrAl2O4:Eu,Dy luminescent pigment has been investigated. Coprecipitation as a low cost and facile method was selected. X-ray diffraction patterns indicated the formation of SrAl2O4:Eu,Dy phase through calcinations process above 800 °C. Moreover, a few amount of silica caused the structural transformation to alumina silicate phase. Transparent glaze which consist of...

Present-day vertebrates vary enormously in the sophistication of their color vision, the density and spatial distribution of cone classes, and the number and absorption maxima of their cone pigments At one extreme, most mammals have only three pigments: the two ancestral cone pigments and rhodopsin. Baltimore, Maryland 21205 At the other evolutionary extreme, chickens possess six Nothing in bio...

The biosynthesis of a yellow-green, fluorescent, water-soluble pigment by Pseudomonas jluorescens occurred only when the bacteria were iron-deficient and was not directly influenced by the nature of the organic carbon source. The pigment formed a very stable Fe3+ complex and was purified in this form. Pseudomonasfluorescens produced only one molecular species of fluorescent pigment; however, it...

Two inhibitors of the biosynthesis of aspergillin, the black spore pigment of Aspergillus niger, have been investigated. 2,4-Dithiopyrimidine exerted its inhibitory effect by intracellularly chelating cupric ion required for normal pigmentation. Dimethylsulfoxide prevented the synthesis of certain phenolic precursors of the native pigment. Partial purification and characterization of pigments f...

Present-day vertebrates vary enormously in the sophistication of their color vision, the density and spatial distribution of cone classes, and the number and absorption maxima of their cone pigments At one extreme, most mammals have only three pigments: the two ancestral cone pigments and rhodopsin. Baltimore, Maryland 21205 At the other evolutionary extreme, chickens possess six Nothing in bio...

Chemical synthesis of indigo poses harsh environmental hazards and adverse human health effects. This necessitates an environment-friendly and producer-friendly approach for indigo production. The present study was thus significant as it reports an indigenously isolated potential indigo pigment producing culture identified as Pseudomonas sp. HAV-1 with noteworthy antioxidant property. The bioin...