Results 21 to 30 of about 5,617 (213)

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, Anthony Camus, Guillaume Beaulieu, Jordan De Angelis, Christian Pellerin, Alessandro Pezzella, Clara Santato   +6 more
openaire   +4 more sources

Appearing as eumelanin or as pheomelanin and the push towards eumelanin by cysteine.

, 2022
This report is a combination of new and former experimental results collected over the past three years. It details our observations and spectroscopic studies of the air-mediated oxidation of a wide variety of catecholic precursors into melanin-like ...
Koen Vercruysse, Venise Govan, Jada Harrison, Tyona Caldwell, Jaila Winford   +4 more
openaire   +2 more sources

Edible Fungi Melanin: Recent Advances in Extraction, Characterization, Biological Activity and Applications [PDF]

Journal of Fungi
Natural melanin biopolymers exhibit a variety of biological activities, but their commercial development is constrained by numerous factors, including high costs, unsustainable sources, the use of harmful solvents during extraction, and low extraction ...
Jiandong Tang, Hebin Shen, Wenyu Lv, Jingxuan Zhang, Junsheng Fu   +4 more
doaj   +2 more sources

Evolutionary Origin of Ocular Melanoma: Associations With rs12913832 G Allele Frequency and Latitude. [PDF]

Cancer Med
The rs12913832 derived (G) allele frequency (blue‐eye allele) was a markedly stronger predictor of ocular melanoma incidence than geographic latitude, with approximately 92% of the latitude effect mediated through allele frequency. These findings indicate that pigmentation‐related genetic variation contributes substantially to global differences in ...
Witzenhausen H, Helgadottir H, Höiom V, Olofsson Bagge R, Stålhammar G.   +4 more
europepmc   +2 more sources

In Vitro Osteogenic Stimulation of Human Adipose-Derived MSCs on Biofunctional 3D-Printed Scaffolds [PDF]

Biomedicines
Background: Human adipose-derived mesenchymal stem cells (hADMSCs) are widely used in regenerative medicine due to their ability to proliferate and differentiate.
Serena Munaò, Ugo D’Amora, Luana Vittoria Bauso, Alfredo Ronca, Paola Manini, Alessandro Pezzella, Maria Grazia Raucci, Luigi Ambrosio, Giovanna Calabrese   +8 more
doaj   +2 more sources

A newly isolated Streptomyces nigra strain for the biotechnological production of melanin [PDF]

Applied Microbiology and Biotechnology
Melanins are pigments widely distributed in microbial, plant, and animal kingdoms. Their UV–visible light shielding capacity, metal chelation ability, antioxidant, and antimicrobial properties make these pigments suitable for different industrial ...
Donatella Cimini, Sergio D’ambrosio, Odile Francesca Restaino, Talayeh Kordjazi, Claudio Gervasi, Martina Aulitto, Islam Sayah, Paola Manini, Matilde Tancredi, Riccardo Peluso, Giuseppina Mandalari, Teresa Gervasi   +11 more
doaj   +2 more sources

Quantitative Fluorescence Excitation Spectra of Synthetic Eumelanin [PDF]

The Journal of Physical Chemistry B, 2005
Previously reported excitation spectra for eumelanin are sparse and inconsistent. Moreover, these studies have failed to account for probe beam attenuation and emission reabsorption within the samples, making them qualitative at best. We report for the first time quantitative excitation spectra for synthetic eumelanin, acquired for a range of solution ...
Nighswander-Rempel, S. P., Riesz, J., Gilmore, J., Bothma, J. P., Meredith, P.   +4 more
openaire   +7 more sources

Structural Investigation of DHICA Eumelanin Using Density Functional Theory and Classical Molecular Dynamics Simulations

Molecules, 2022
Eumelanin is an important pigment, for example, in skin, hair, eyes, and the inner ear. It is a highly heterogeneous polymer with 5,6-dihydroxyindole-2-carboxylic acid (DHICA) and 5,6-dihydroxyindole (DHI) building blocks, of which DHICA is reported as ...
Sepideh Soltani, Shahin Sowlati-Hashjin, Conrard Giresse Tetsassi Feugmo, Mikko Karttunen   +3 more
doaj   +1 more source

Free energy and stacking of eumelanin nanoaggregates [PDF]

The Journal of Physical Chemistry B, 2021
Abstract Eumelanin, a member of the melanin family, is a black-brown insoluble pigment. It possesses a broad range of properties such as antioxidation, free radical scavenging, photo-protection, and charge carrier transportation. Surprisingly, the exact molecular structure of eumelanin remains undefined.
Soltani, Sepideh, Sowlati-Hashjin, Shahin, Tetsassi Feugmo, Conrard Giresse, Karttunen, Mikko   +3 more
openaire   +3 more sources

Differential Induction of Reactive Oxygen Species and Expression of Antioxidant Enzymes in Human Melanocytes Correlate with Melanin Content: Implications on the Response to Solar UV and Melanoma Susceptibility

Antioxidants, 2022
Constitutive pigmentation determines the response to sun exposure and the risk for melanoma, an oxidative stress–driven tumor. Using primary cultures of human melanocytes, we compared the effects of constitutive pigmentation on their antioxidant response
Parth R. Upadhyay, Renny J. Starner, Viki B. Swope, Kazumasa Wakamatsu, Shosuke Ito, Zalfa A. Abdel-Malek   +5 more
doaj   +1 more source