Results 31 to 40 of about 6,578 (220)
Biomedicines, 2022 An optimized extraction protocol for eumelanins from black soldier flies (BSF-Eumel) allows an in-depth study of natural eumelanin pigments, which are a valuable tool for the design and fabrication of sustainable scaffolds.
U. D’Amora +11 more
semanticscholar +1 more source
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 materials. Depending on the precursor involved and the reaction conditions employed, dark-brown to black
Koen Vercruysse +4 more
openaire +1 more source
Medicine Science, 2023 Melanins, which are divided into five different subgroups as eumelanin, pheomelanin, allomelanin, neuromelanin and pyomelanin, are a heterogeneous and amorphous biopolymer family.
Hamit Emre Kizil +3 more
doaj +1 more source
A quantum yield map for synthetic eumelanin [PDF]
The Journal of Chemical Physics, 2005 The quantum yield of synthetic eumelanin is known to be extremely low and it has recently been reported to be dependent on excitation wavelength. In this paper, we present quantum yield as a function of excitation wavelength between 250 and 500nm, showing it to be a factor of 4 higher at 250nm than at 500nm.
Nighswander-Rempel, Stephen P. +3 more
openaire +7 more sources
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
Bioactive Composite Methacrylated Gellan Gum for 3D-Printed Bone Tissue-Engineered Scaffolds
Nanomaterials, 2023 Gellan gum (GG) was chemically modified with methacrylic moieties to produce a photocrosslinkable biomaterial ink, hereinafter called methacrylated GG (GGMA), with improved physico-chemical properties, mechanical behavior and stability under ...
Ugo D’Amora +10 more
doaj +1 more source
Metabolic Basis and Clinical Evidence for Skin Lightening Effects of Thiol Compounds
Antioxidants, 2022 Melanin pigment is a major factor in determining the color of the skin, and its abnormal increase or decrease can cause serious pigmentation disorders.
Yong Chool Boo
doaj +1 more source
Ultrafast Radical Photogeneration Pathways in Eumelanin †
Photochemistry and Photobiology, 2022 Eumelanin is a ubiquitous biological pigment that rapidly and efficiently deactivates excited states created by UV or visible radiation. Paradoxically, photoirradiation of eumelanin also generates radicals and harmful reactive oxygen species, but the ...
Christopher Grieco +2 more
semanticscholar +1 more source
Eumelanin Graphene-Like Integration: The Impact on Physical Properties and Electrical Conductivity
Frontiers in Chemistry, 2019 The recent development of eumelanin pigment-based blends integrating “classical” organic conducting materials is expanding the scope of eumelanin in bioelectronics.
Roberto Di Capua +6 more
doaj +1 more source
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