STUDIES ON MELANIN
نویسندگان
چکیده
منابع مشابه
Melanin, melanin "ghosts," and melanin composition in Cryptococcus neoformans.
Melanin synthesis is associated with virulence for the pathogenic fungus Cryptococcus neoformans. Exposure of nonmelanized C. neoformans 4067 cells to 4 M guanidinium isothiocyanate followed by 6 M HCl at 100 degrees C resulted in complete solubilization of cellular structures. However, exposure of melanized C. neoformans 24067 to the same conditions produced a suspension of black particles. An...
متن کاملStudies on Synthetic and Natural Melanin and Its Affinity for Fe(III) Ion
In this work, we measured the metal-binding sites of natural and synthetic dihydroxyindole (DHI) melanins and their respective interactions with Fe(III) ions. Besides the two acid groups detected for the DHI system: catechol (Cat) and quinone-imine (QI), acetate groups were detected in the natural oligomer by potentiometric titrations. At acidic pH values, Fe(III) complexation with synthetic me...
متن کاملStudies on an Actinomycete Producing a Melanin Pigment Inhibiting Aflatoxin B1 Production by Aspergillus flavus
Thirty different isolates of actinomycetes collected from different localities in Gharbia Governorate, Egypt were tested for melanin pigment production. Only one isolate produced melanin and identified as Streptomyces torulosus. The selected actinomycete isolate was grown under different cultural conditions and it was found that starch-nitrate medium was the optimum for the growth of selected i...
متن کاملStudy of Melanin Bleaching After Immunohistochemistry of Melanin-containing Tissues
Melanin may interfere with immunohistochemical staining. The goal of this study was to investigate the effects of trichloroisocyanuric acid (TCCA) bleaching, potassium permanganate bleaching, and potassium dichromate bleaching on melanin, tissue antigen, and 3,3'-diaminobenzidine (DAB) using melanin-containing and melanin-free tissue samples. Our results demonstrated that all 3 bleaching method...
متن کاملIsolation, Characterization of Melanin Producing Organism and Extraction of Melanin
Melanin producing organism was isolated from a soil sample of Ahmednagar district, Maharashtra using Tyrosine casein media. The isolated organism’s morphology and spore arrangement was studied. The isolated organism was suspected to belong to the genus Streptomyces. Parameter optimization of the Tyrosine casein media with respect to carbon and nitrogen source was done. Starch and L-glycine were...
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ژورنال
عنوان ژورنال: The Tohoku Journal of Experimental Medicine
سال: 1957
ISSN: 0040-8727,1349-3329
DOI: 10.1620/tjem.65.supplement_102