Results 11 to 20 of about 15,215 (310)
Physico-chemical evaluation of rationally designed melanins as novel nature-inspired radioprotectors. [PDF]
PLoS ONE, 2009 Melanin, a high-molecular weight pigment that is ubiquitous in nature, protects melanized microorganisms against high doses of ionizing radiation. However, the physics of melanin interaction with ionizing radiation is unknown.We rationally designed ...
Andrew D Schweitzer +9 more
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Melanin, melanin "ghosts," and melanin composition in Cryptococcus neoformans [PDF]
Infection and Immunity, 1996 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.
A Casadevall, Yulin Wang, Philip Aisen
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The influence of agrotechnical measures on the number of melanin-synthesizing microorganisms
Наукові горизонти, 2023 In connection with the growing scale of soil dehumification, studies of the patterns of synthesis of the precursors of humus molecules – melanins of bacterial origin – are becoming increasingly relevant.
Iryna Malynovska +4 more
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Fungal melanins differ in planar stacking distances. [PDF]
PLoS ONE, 2012 Melanins are notoriously difficult to study because they are amorphous, insoluble and often associated with other biological materials. Consequently, there is a dearth of structural techniques to study this enigmatic pigment.
Arturo Casadevall +3 more
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Журнал микробиологии, эпидемиологии и иммунобиологии, 2023 Introduction. Influenza A virus is the cause of epidemics and pandemics that severely affect the health and socioeconomic status of the world's population.
Ekaterina I. Filippova +5 more
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Molecules, 2022 We report herein an optimized procedure for preparation of carboxamides of 5,6-dihydroxyindole-2-carboxylic acid (DHICA), the main biosynthetic precursor of the skin photoprotective agents melanins, to get access to pigments with more favorable ...
Rita Argenziano +3 more
doaj +1 more source
Nature, 1947 IT has been suggested recently1 that 5 : 6: 5â:6â-tetrahydroxy-indigo (I), or a quinone or semi-quinone derived from it, is an important constituent of melanin, the black pigment produced by the oxidation of tyrosine and 3 : 4-dihydroxyphenylalanine2.
J, HARLEY-MASON, G R, CLEMO, J, WEISS
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Structural Color Production in Melanin-based Disordered Colloidal Nanoparticle Assemblies in Spherical Confinement [PDF]
, 2021 Melanin is a ubiquitous natural pigment that exhibits broadband absorption and high refractive index. Despite its widespread use in structural color production, how the absorbing material, melanin, affects the generated color is unknown. Using a combined molecular dynamics and finite-difference time-domain computational approach, this paper ...
arxiv +1 more source
Pigmentary keratitis and mixed chromatophoroma in a betta fish (Betta splendens)
Aquaculture, Fish and Fisheries, Volume 2, Issue 6, Page 587-592, December 2022., 2022 Graphical Abstract This clinical case report describes a <1 year old betta fish that developed pigmentary keratitis, anterior uveitis, and a mixed chromatophoroma that led to the patient's death. A review of available anecdotal and scientific literature suggests that there may have been a genetic cause for these health problems.
Alicia McLaughlin +3 more
wiley +1 more source
Contrast mechanisms in pump-probe microscopy of melanin [PDF]
, 2022 Pump-probe microscopy of melanin in tumors has been proposed to improve diagnosis of malignant melanoma, based on the hypothesis that aggressive cancers disaggregate melanin structure. However, measured signals of melanin are complex superpositions of multiple nonlinear processes, which makes interpretation challenging.
arxiv +1 more source