Melanins are a class of conjugated biopolymers with varying compositions and functions, which have variety potential medical technical applications. Here, this work examines the polymers derived from phenolic monomers (catechol (CAT), levodopa (DOPA), homogentisic acid (HGA)), using selection different analytical chemistry techniques to compare their properties view understanding structure–func...

This study elucidates the nature of melanogenesis in B16 and Harding-Passey (HP) mouse melanomas producing melanin and melanosomes of different color and fine structure, i.e., brown-black eumelanosome-like B16 granules and reddish brown pheomelanosome-like HP granules, and compares them with "typical" 3,4-dihydroxyphenylalanine (DOPA) and sepia eumelanins and sepia eumelanosomes. The melanin co...

Abstract Plumage colouration is important for birds as it helps them in camouflage, mate selection, social signalling and various other physiological behavioural processes. The most common pigments responsible are melanins carotenoids. In a few individuals, disrupted due to causes. colour aberrations found leucism, albinism, melanism, carotenism, schizochroism dilution whereas xanthochroism les...

This study elucidates the nature of melanogenesis in B16 and Harding-Passey (HP) mouse melanomas producing melanin and melanosomes of different color and fine structure, i.e., brownblack eumelanosome-like B16 granules and reddish brown pheomelanosome-like HP granules, and compares them with "typical" 3,4-dihydroxyphenylalanine (DOPA) and sepia eumelanins and sepia eumelanosomes. The melanin con...

Melanins are complex biological pigments formed by the oxidative polymerization of phenolic and/or indolic compounds. These pigments have been implicated in the pathogenesis of some microbial infections, malignancies, degenerative disorders, and autoimmune diseases. Recent studies have demonstrated that melanins have antigenic and anti-inflammatory properties. These findings led us to further e...

Melanins (eumelanin, pheomelanin, and allomelanin) represent a very, if not the most, important group of biological pigments. Their roles are multiple, from photoprotection to antioxidant activity, heavy metal dis... | Find, read cite all research you need on Tech Science Press

Melanins are a group of complex pigments of biological origin, widely spread in all species from fungi to man. Among diverse types of melanins, the human melanins, eumelanins, are brown or black nitrogen-containing pigments, mostly known for their photoprotective properties in human skin. We have undertaken theoretical studies aimed to understand absorption spectra of eumelanins and their chemi...

Melanins are stable and non-toxic biomaterials with a great potential as chemopreventive agents for diseases connected oxidative stress, but the mechanism of their antioxidant action is unclear. Herein, we show that polydopamine (PDA), well-known synthetic melanin, becomes an excellent trap alkylperoxyl radicals (ROO., typically formed during autoxidation lipid substrates) in presence hydropero...