1. Two important methods for the study of malarial pigment are described. (a) A method for obtaining a solution of malarial pigment from fixed tissues without the removal of a trace of hemoglobin from the red blood corpuscles. (b) A method for obtaining an iron reaction in malarial pigment. 2. By comparing the bleach reactions and solubility of melanins and malarial pigment, the dissimilarity o...

Abstract Melanins are the most common pigments in birds and mammals. The synthesis of sulfurated form melanin, termed pheomelanin, is promoted by high levels thiols melanocytes. Exposure to elemental sulfur environment can potentially influence intracellular thiol terrestrial animals, but this has never been investigated wild. This particularly relevant areas with a volcanic activity that facil...

Global demand for natural pigments and dyes has increased much in recent years, driven by a heightened awareness of the toxic effects various synthetic on pollution environment health human. The colorants obtained through plants microbes are primary source exploited modern industries. Among other non-conventional sources, filamentous fungi particularly known to produce an extraordinary range co...

The melanins are a class of natural pigments ubiquitous throughout the biosphere. These gaining significant attention as advanced materials due to their biocompatibility, optical and electrical properties. most common form melanin, eumelanin, has well-known problem insolubility in solvents. made standard chemical analysis challenging, leading researchers opting use X-Ray photoelectron spectrosc...

The pigmentation of black (wild) and red (mutant) eyes of Triatoma infestans was studied spectrophotometrically and compared with red-eyed (wild) and white-eyed (mutant) forms of Drosophila melanogaster. The spectral absorption profiles of the black and red eye pigments of T. infestans were similar to each other and to that of the wild-type eyes of D. melanogaster. The similarity to the wild fo...

By using meterological rockets fitted with specially designed analyzers, samples for microbiological investigation have been taken. The analyzer design prevented extraneous microorganisms from penetrating into the analyzer. Before being used, the analyzers were sterilized with high gamma-ray doses. For the first time microorganisms have been detected in the mesosphere at an altitude of 48 to 77...