Results 51 to 60 of about 5,617 (213)

Identification of L-Cysteinamide as a Potent Inhibitor of Tyrosinase-Mediated Dopachrome Formation and Eumelanin Synthesis

Antioxidants, 2021
The purpose of this study is to identify amino acid derivatives with potent anti-eumelanogenic activity. First, we compared the effects of twenty different amidated amino acids on tyrosinase (TYR)-mediated dopachrome formation in vitro and melanin ...
Hyun Kyung Lee, Jae Won Ha, Yun Jeong Hwang, Yong Chool Boo   +3 more
doaj   +1 more source

Elucidation of the hierarchical structure of natural eumelanins [PDF]

Journal of The Royal Society Interface, 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.
Ming Xiao, Wei Chen, Weiyao Li, Jiuzhou Zhao, You-lee Hong, Yusuke Nishiyama, Toshikazu Miyoshi, Matthew D. Shawkey, Ali Dhinojwala   +8 more
openaire   +2 more sources

Eumelanin scores

, 2019
Eumelanin ...
Hackett, Shannon, Chad Eliason (4420921), Eliason, Chad, Andersen, Michael, Michael Andersen (3681979), Shannon Hackett (3858382)   +5 more
core   +2 more sources

Anomalous evolution of broadband optical absorption reveals dynamic solid state reorganization during eumelanin build-up in thin films

Scientific Reports, 2017
The origin of eumelanin optical properties remains a formidable conundrum preventing a detailed understanding of the complex photo-protective role of these widespread natural pigments and the rational design of innovative bioinspired materials for ...
Carmela Bonavolontà, Corrado de Lisio, Marco d’Ischia, Pasqualino Maddalena, Paola Manini, Alessandro Pezzella, Massimo Valentino   +6 more
doaj   +1 more source

Investigation of Eumelanin Biosynthesis in Gluconacetobacter tumulisoli FBFS 97: A Novel Insight into a Bacterial Melanin Producer

Microorganisms
Acetic acid bacteria (AAB) are a group of bacteria, most of which can produce pigments. However, the mechanism of pigment production by AAB is unclear.
Jiayun Song, Yanqin Ma, Zhenzhen Xie, Fusheng Chen   +3 more
doaj   +1 more source

Radioactivity to Rethink the Earth's Energy Balance

Global Challenges, 2021
This contribution invites to re‐examine the whole matter of radioactivity, reconsidering it from the point of view of a realistic source of energy. State‐of‐the‐art and technical aspects are briefly illustrated in this note that aims to open a discussion
Maria Letizia Terranova
doaj   +1 more source

Agouti protein, mahogunin, and attractin in pheomelanogenesis and melanoblast-like alteration of melanocytes: a cAMP-independent pathway

, 2009
Melanocortin-1 receptor (MC1R) and its ligands, a-melanocyte stimulating hormone (aMSH) and agouti signaling protein (ASIP), regulate switching between eumelanin and pheomelanin synthesis in melanocytes.
Bennett, DC, Jimbow, K, Wakamatsu, Kazumasa, Elena V. Sviderskaya, Shosuke Ito, Montoliu, L, Andrew J. Donkin, Tokimasa Hida, Yu, B, Bin Yu, Lluis Montoliu, Donkin, AJ, Wakamatsu, K, Dorothy C. Bennett, Hida, T, Yu, Bin, Millhauser, Glenn L., Bennett, Dorothy C., Barsh, GS, Sviderskaya, Elena V., Sviderskaya, EV, Ito, Shosuke, Lamoreux, ML, Kazumasa Wakamatsu, M. Lynn Lamoreux, Glenn L. Millhauser, Kowichi Jimbow, Lynn Lamoreux, M, Donkin, Andrew J., Lamoreux, M. Lynn, Hida, Tokimasa, Montoliu, Lluís, Gregory S. Barsh, Millhauser, GL, Barsh, Gregory S., Ito, S, Jimbow, Kowichi   +36 more
core   +1 more source

Melanin-Based Coatings as Lead-Binding Agents

Bioinorganic Chemistry and Applications, 2012
Interactions between metal ions and different forms of melanin play significant roles in melanin biochemistry. The binding properties of natural melanin and related synthetic materials can be exploited for nonbiological applications, potentially ...
Karin Sono, Diane Lye, Christine A. Moore, W. Christopher Boyd, Thomas A. Gorlin, Jason M. Belitsky   +5 more
doaj   +1 more source

En Route to a Chiral Melanin: The Dynamic “From-Imprinted-to-Template” Supramolecular Role of Porphyrin Hetero-Aggregates During the Oxidative Polymerization of L-DOPA

Frontiers in Chemistry, 2020
Chiral porphyrin hetero-aggregates, produced from meso-tetrakis(4-N-methylpyridyl) porphyrin H2T4 and copper(II) meso-tetrakis(4-sulfonatophenyl)porphyrin CuTPPS by an imprinting effect in the presence of L-3,4-dihydroxyphenylalanine (L-DOPA), are shown ...
Massimiliano Gaeta, Rosalba Randazzo, Valentina Villari, Norberto Micali, Alessandro Pezzella, Roberto Purrello, Marco d'Ischia, Alessandro D'Urso   +7 more
doaj   +1 more source

Beyond Molecular Determinism: State‐Convergent Polymerization as a Functional Design Principle Under Chemical Complexity

Advanced Science, EarlyView.
This work introduces state‐convergent polymerization (SCP), a polymerization framework in which chemically diverse reaction pathways converge toward a reproducible functional polymeric state rather than a defined molecular structure. Using melanin and polydopamine as exemplars, SCP explains how robust polymer functions emerge under chemical and ...
Seonki Hong
wiley   +1 more source