Results 61 to 70 of about 6,578 (220)

Experimental methods in chemical engineering: Cyclic voltammetry—CV

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Cyclic voltammetry (CV) is a foundational electroanalytical technique for investigating redox behaviour and evaluating material performance across fields such as molecular electrochemistry, electrocatalysis, sensing, and energy storage. Despite its widespread use, a gap remains between formal electrochemical theory and the practical data ...
Yasser Matos‐Peralta, Christopher Panaritis, JoElen Hagler, Clara Santato, Gregory S. Patience   +4 more
wiley   +1 more source

Probing the heterogeneous structure of eumelanin using ultrafast vibrational fingerprinting

Nature Communications, 2020
Eumelanin is a brown-black biological pigment with sunscreen and radical scavenging functions important to numerous organisms. Eumelanin is also a promising redox-active material for energy conversion and storage, but the chemical structures present in ...
Christopher Grieco, Forrest R Kohl, A. Hanes, B. Kohler   +3 more
semanticscholar   +1 more source

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   +6 more sources

Alpha‐Synuclein Promotes Anterograde Vesicle Transport in Melanocytes and Melanoma Cells: A Pro‐Survival Function

Journal of the Chinese Chemical Society, EarlyView.
Model for how α‐syn modulates the positioning of endolysosomes in melanoma cells. (a) α‐syn tethers endolysosomes to the plasma membrane, a last step in anterograde transport. (b) Loss of α‐syn expression causes the loss of the tethering function, which leads to perinuclear vesicle clustering. Reproduced from the open access article.
Stephan N. Witt
wiley   +1 more source

Exploring the chemistry and composition of black soldier fly eumelanin, a material for a circular economy

Materials Advances
Demonstrated is the first example of dihydroxyindole carboxylic acid presence within an insect eumelanin, a conductive biomaterial material for the circular economy.
A. B. Mostert, S. Mattiello, S. Li, G. Perna, M. Lasalvia, P. Ambrico, J. V. Paulin, J. V. M. Lima, C. F. Graeff, J. W. Phua, M. Matta, A. Surman, R. Gunnella, M. Ambrico   +13 more
semanticscholar   +1 more source

Cutaneous Pigmentary Changes During Setmelanotide Therapy: Dermoscopic and Confocal Findings in Two Patients

JEADV Clinical Practice, EarlyView.
ABSTRACT Setmelanotide is a melanocortin‐4 receptor agonist approved for the treatment of rare forms of genetic obesity. Through off‐target activation of the melanocortin‐1 receptor, it may induce cutaneous pigmentation changes; however, data regarding its effects on melanocytic nevi remain limited.
Martina Cavicchi, Claudia Lasagni, Silvana Ciardo, Francesca Giusti, Albino Eccher, Caterina Longo   +5 more
wiley   +1 more source

Exploring the optical properties of metal-modified melanin following ultraviolet irradiation: An experimental and theoretical study using density functional theory

Heliyon
Melanin has an important function to protect humans from sunlight because of its broad spectrum of light absorption. This characteristic varies according to the nature of absorption and the amount of melanin manufactured.
Nawal Madkhali, Saja Algessair
doaj   +1 more source

Melanin and Melanin-Like Hybrid Materials in Regenerative Medicine

Nanomaterials, 2020
Melanins are a group of dark insoluble pigments found widespread in nature. In mammals, the brown-black eumelanins and the reddish-yellow pheomelanins are the main determinants of skin, hair, and eye pigmentation and play a significant role in ...
Chiara Cavallini, Giuseppe Vitiello, Barbara Adinolfi, Brigida Silvestri, Paolo Armanetti, Paola Manini, Alessandro Pezzella, Marco d’Ischia, Giuseppina Luciani, Luca Menichetti   +9 more
doaj   +1 more source

Beyond Skin and Eyes: The Medical and Social Burden of Oculocutaneous Albinism in Africa: A Narrative Review

JEADV Clinical Practice, EarlyView.
ABSTRACT Oculocutaneous albinism (OCA) is a genetic disorder found worldwide, but its impact is particularly pronounced in the African continent. This results from both a higher prevalence and the persistent myths and superstitions surrounding the condition in many African communities.
Rebecca Donadoni, Niccolò Capurro, Alessandro Svizzero, Valeria Brazzelli   +3 more
wiley   +1 more source

Electron diffraction and solid-state NMR reveal the structure and exciton coupling in a eumelanin precursor

Chemical Science
Eumelanin, a versatile biomaterial found throughout the animal kingdom, performs essential functions like photoprotection and radical scavenging. The diverse properties of eumelanin are attributed to its elusive and heterogenous structure with DHI (5,6 ...
K. Vinod, Renny Mathew, Christian Jandl, Brijith Thomas, Mahesh Hariharan   +4 more
semanticscholar   +1 more source