The sensitivities of the human green and red cone mechanisms to sinusiodally flickering light were found to be near equal and independent of field size and estimation method No wavelength dependency of modulation sensitivity was found. An observer who lacks the red cone pigment (protanope) did not show unusually high flicker sensitivity to green light of 525nm. The modulation transfer function ...

The dark green leaves of Sauropus androgynus (Euphorbiaceae) have various nutritive values and are commonly used for human consumption as food, medicine, natural dye substance in South-east Asia. Shoot cultures this plant were established by adding concentrations kinetin (Kn) benzyl adenine (BA) using nodal explants. best results recorded when Kn 0.1 mg/L was with BA 1 (BA1Kn0.1). Spectrophotom...

The feathers of Amazon parrots are brightly coloured. They contain a unique class of pigments, the psittacofulvins, deposited in both barbs and barbules, causing yellow or red coloured feathers. In specific feather areas, spongy nanostructured barb cells exist, reflecting either in the blue or blue-green wavelength range. The blue-green spongy structures are partly enveloped by a blue-absorbing...

Objective(s): Pyocyanin, a blue-green pigment produced by Pseudomonas aeruginosa, interferes with host redox cycles, which can lead to generation of reactive oxygen species and progressive cellular oxidative damage. The aim of this study was to assess the influence of pyocyanin on human pancreatic cancer cell line.Materials and Methods: Polymerase Chain Reaction (PCR) was applied to confirm the...

We describe a blue/green inorganic material, Ba3(P1−xMnxO4)2 (I) based on tetrahedral MnO3− 4 :3d 2 chromophore. The solid solutions (I) which are sky-blue and turquoise-blue for x ≤ 0·25 and dark green for x ≥ 0·50, are readily synthesized in air from commonly available starting materials, stabilizing the MnO3− 4 chromophore in an isostructural phosphate host. We suggest that the covalency/ion...

HE vermilion eye color mutant Drosophila melanogaster was one of the Tmutants used by BEADLE, EPHRUSSI, TATUM and their collaborators in their early attempts to interpret the biochemical effects of genes (Cf. Review by EPHRUSI 1942). More recent studies on vermilion mutants (GREEN 1949, 1952, 1954) made it seem worthwhile to pursue further the study of the physiological effects of these mutants...