Results 21 to 30 of about 9,564 (223)
Journal of Biomedical Optics, 2012 We describe the auto-oxidation of 3, 4-dihydroxy-L-phenylalanine (L-DOPA) in the synthesis of eumelanin to spontaneously produce fibrils upon drying. The self-assembled fibrils are of characteristic diameter ∼1 to 2 μm, composed of filaments, and are unidirectional, apart from branches that are formed at typically an angle of 20 to 22 deg.
McQueenie, Ross +3 more
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Eumelanin: From Molecular State to Film
The Journal of Physical Chemistry C, 2021 Eumelanin, a macromolecular biopigment, is an attractive candidate for sustainable (green) organic electronics.
Manuel Reali +6 more
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Nature Communications, 2023 Melanin pigments play a critical role in physiological processes and shaping animal behaviour. Fossil melanin is a unique resource for understanding the functional evolution of melanin but the impact of fossilisation on molecular signatures for eumelanin
Tiffany S. Slater +7 more
doaj +1 more source
The photoreactive free radical in eumelanin [PDF]
Science Advances, 2018 We demonstrate experimentally for the first time the presence of two free radicals in the pigment eumelanin.
Albertus B. Mostert +4 more
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Oxidative physiology is weakly associated with pigmentation in birds
Ecology and Evolution, 2022 The mechanistic link between avian oxidative physiology and plumage coloration has attracted considerable attention in past decades. Hence, multiple proximal hypotheses were proposed to explain how oxidative state might covary with the production of ...
Attila Marton +11 more
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Molecules, 2020 Theoretical results for the magnetic shielding of protonated and unprotonated nitrogens of eumelanin building blocks including monomers, dimers, and tetramers in gas phase and water are presented. The magnetic property in water was determined by carrying
Leonardo Bruno Assis Oliveira +2 more
doaj +1 more source
Macrophage migration inhibitory factor (MIF) family in arthropods : Cloning and expression analysis of two MIF and one D-dopachrome tautomerase (DDT) homologues in Mud crabs, Scylla paramamosain [PDF]
, 2016 Acknowledgements This research was supported by grants from the National Natural Science Foundation of China (Nos. 31172438 and U1205123), the Natural Science Foundation of Fujian Province (No.
Duan, Li-Peng +7 more
core +1 more source
Splenic eumelanin differs from hair eumelanin in C57BL/6 mice.
Acta Biochimica Polonica, 2005 The presence of melanin in spleens of black C57BL/6 mice has been known for long. Although its origin and biological functions are still obscure, the relation of splenic melanin to the hair follicle and skin pigmentation was suggested. Here, we demonstrated using for the first time electron paramagnetic resonance spectroscopy that black-spotted C57BL/6
Płonka, Przemysław +5 more
openaire +4 more sources
Elucidation of the hierarchical structure of natural eumelanins [PDF]
, 2018 Eumelanin is one of the most ubiquitous pigments in living organisms and plays an important role in coloration and UV protection. Because eumelanin is highly cross-linked and insoluble in solvents, the chemical structure is still not completely known. In
Chen, Wei +8 more
core +2 more sources
Eumelanin Adsorption on Silicon: Optical Properties of Si(001)-Adsorbed Eumelanin Tetrameric Protomolecules [PDF]
The Journal of Physical Chemistry C, 2020 We predict the optical properties (in particular optical absorbance and reflectance anisotropy spectra (RAS)) of the silicon(001) surface organically functionalized by the adsorption of chosen tetr...
Molteni, Elena +4 more
openaire +1 more source