Results 31 to 40 of about 6,853 (289)

SEARCH PRODUCERS OF POLYPHENOLS AND SOME PIGMENTS AMONG BASIDIOMYCETES [PDF]

open access: yesBiotechnologia Acta, 2014
General content of polyphenols, carotenoids and melanin in basidiomycetes carpophorus was determined. 50 species were studied, 27 of which belong to the Polyporales form and 23 are to the Agaricales form.
Fedotov О. V., Veligodska A. K.
doaj   +1 more source

Effect of UV irradiation on free radicals in synthetic melanin and melanin biopolymer from Sepia officinalis – EPR examination

open access: yesNukleonika, 2015
Free radicals in synthetic melanin and melanin from Sepia officinalis were studied by electron paramagnetic resonance (EPR) spectroscopy. The effect of time of ultraviolet (UV) irradiation on free radicals in these melanins was tested.
Zdybel Magdalena, Pilawa Barbara
doaj   +1 more source

GENES DETERMINING THE SYNTHESIS OF LAVONOID AND MELANIN PIGMENTS IN BARLEY

open access: yesВавиловский журнал генетики и селекции, 2018
In addition to the green color caused by chlorophyll, grain and vegetative organs of barley can be colored by compounds of phenolic nature, such as melanins and lavonoids, which include anthocyanins, proanthocyanidins. Due to the wide biological activity
O. Yu. Shoeva   +2 more
doaj   +1 more source

Effect of Melanization on Thallus Microstructure in the Lichen Lobaria pulmonaria

open access: yesJournal of Fungi, 2022
Lichens often grow in microhabitats where they experience severe abiotic stresses. Some species respond to high UV radiation by synthesizing dark brown melanic pigments in the upper cortex. However, unlike the melanized structures of non-lichenized fungi,
Amina G. Daminova   +4 more
doaj   +1 more source

Melanin ‘dust’ or ‘ghost’? [PDF]

open access: yesExperimental Dermatology, 2016
To definitely verify the dogma of ‘melanin dust’ in the stratum corneum, Tobin et al have now reported a careful review of the literature with a vis-à-vis of the Fontana Masson (FM) and Von Kossa (VK) histochemical methods plus the Warthin-Starry (WS) stain on very thin cryosections of normal human skin and mouse pelage skin epidermis lacking ...
D'ISCHIA, MARCO   +3 more
openaire   +5 more sources

Antioxidative Properties of Melanins and Ommochromes from Black Soldier Fly Hermetia illucens

open access: yesBiomolecules, 2019
A comparative study of melanin and ommochrome-containing samples, isolated from the black soldier fly (BSF) by enzymatic hydrolysis, alkaline and acid alcohol extraction or by acid hydrolysis, was carried out.
Nina Ushakova   +4 more
doaj   +1 more source

The interplay of chemical structure, physical properties, and structural design as a tool to modulate the properties of melanins within mesopores

open access: yesScientific Reports, 2022
The design of modern devices that can fulfil the requirements for sustainability and renewable energy applications calls for both new materials and a better understanding of the mixing of existing materials.
Alessandro Pira   +6 more
doaj   +1 more source

A Comprehensive Review of Mammalian Pigmentation: Paving the Way for Innovative Hair Colour-Changing Cosmetics

open access: yesBiology, 2023
The natural colour of hair shafts is formed at the bulb of hair follicles, and it is coupled to the hair growth cycle. Three critical processes must happen for efficient pigmentation: (1) melanosome biogenesis in neural crest-derived melanocytes, (2) the
Bruno Fernandes   +2 more
doaj   +1 more source

Solubility of Melanins [PDF]

open access: yesNature, 1952
IN further attempts to find a solvent for melanin which would be of use in histological work, the following substances have been found to dissolve, in the cold, the pigments extracted from the ink sac of Sepia officinalis and melanoma tissue, and those prepared from adrenaline and 3,4-dihydroxyphenylalanine (dopa): ethylene glycol monomethyl ether ...
openaire   +2 more sources

Photodynamics of Melanin Radicals: Contribution to Photoprotection by Melanin

open access: yesPhotochemistry and Photobiology, 2022
AbstractThe mechanism of very efficient relaxation of the melanin‐photoexcited states, responsible for the photoprotective action of the pigment, remains a subject for intense investigation. The most recent study by C. Grieco, F. Kohl, and B. Kohler, entitled “Ultrafast radical photogeneration pathways in eumelanin,” addresses key issues of melanin ...
openaire   +3 more sources

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