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Exploring the Charge Transport of a Natural Eumelanin for Sustainable Technologies.

ACS Applied Bio Materials, 2023
Eumelanin, the main quinone-based biomaterial of the melanin family of compounds, is emerging as a model for medical and sustainable electronic interfaces due to its biocompatibility, biodegradability, and transducing abilities.
J. V. Paulin   +3 more
semanticscholar   +1 more source

The influence of copper ions on the transport and relaxation properties of hydrated eumelanin.

Physical Chemistry, Chemical Physics - PCCP, 2023
Eumelanin, the human skin pigment, is a poly-indolequinone material possessing a unique combination of physical and chemical properties. For numerous applications, the conductivity of eumelanin is of paramount importance. However, its hydration dependent
P. Abramov   +4 more
semanticscholar   +1 more source

Determination of toxicity and radioprotective properties of bacterial and fungal eumelanin pigments

International Journal of Radiation Biology, 2023
Purpose Determination of the protective property of melanin, an organic polymer class consisting of phenolic and/or indolic compounds isolated from bacteria and fungi, against fast neutron radiation.
S. Bayram   +5 more
semanticscholar   +1 more source

Intrinsically Bioactive Manganese–Eumelanin Nanocomposites Mediated Antioxidation and Anti‐Neuroinflammation for Targeted Theranostics of Traumatic Brain Injury

Advanced Healthcare Materials, 2022
Overproduced reactive oxygen species and the induced oxidative stress and neuroinflammation often result in secondary injury, which is associated with unfavorable prognosis in traumatic brain injury (TBI).
Duo Sun   +11 more
semanticscholar   +1 more source

Co-Assembly of Colloids and Eumelanin Nanoparticles in Droplets for Structural Pigments with High Saturation.

Small, 2021
Colloidal crystals have been used to develop structural colors. However, incoherent scattering causes the colors to turn whitish, reducing the color saturation. To overcome the problem, light-absorbing additives have been incorporated.
S. Han, Ye Hun Choi, Shin‐Hyun Kim
semanticscholar   +1 more source

Fluorescence spectroscopy of eumelanins

IEEE Journal of Quantum Electronics, 1984
The fluorescence spectra from different forms of melanin, excited by an argon-ion laser at 488 nm wavelength were measured. The fluorescence intensity and maxima were found to be dependent on the melanin concentration. The location of the fluorescence maxima depends on the type of melanin and its environment.
S. Kozikowski, L. Wolfram, R. Alfano
openaire   +1 more source

Establishing structure–function relationships for eumelanin

Biopolymers, 2002
AbstractThe aggregation‐dependent optical properties of eumelanin from human hair are examined. When aggregation is increased, the absorption spectrum extends to lower energy. The absorption spectra of oligomers isolated from black human hair and Sepia officinalis are comparable and are in quantitative agreement with the reported action spectra for ...
J Brian, Nofsinger   +2 more
openaire   +2 more sources

Flexible Photothermal Phase Change Material with High Photothermal Properties Achieved by Promoted Dispersion of Hydrophobically Modified Eumelanin and its Photovoltaic Applications.

Small
Photothermal phase change materials (PPCMs) are prevalent in energy harvesting and thermal management, owing to their dual functionality of solar-to-heat conversion and latent heat storage capacity.
Luji Li   +7 more
semanticscholar   +1 more source

Sub-50 fs Formation of Charge Transfer States Rules the Fate of Photoexcitations in Eumelanin-Like Materials.

Journal of Physical Chemistry Letters
Eumelanins play a crucial role as photoprotective agents for living organisms, yet the nature of the stationary and transient species involved in the light absorption and deactivation processes remains controversial.
Vasilis Petropoulos   +8 more
semanticscholar   +1 more source

Determination of eumelanin in human urine

Pigment Cell Research, 2006
SummaryNormal and malignant melanocytes produce melanins and melanin‐related metabolites, most of which are retained in the cells but some are secreted into the blood and then excreted in the urine. In this study, we developed a method to measure levels of eumelanin in urine samples and evaluated its clinical significance in comparison with the melanin‐
Kazumasa, Wakamatsu   +4 more
openaire   +2 more sources

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