Results 181 to 190 of about 21,080 (207)

COMPLEX FORMATION OF IRON IONS WITH FUNGAL MELANINS

Russian Journal of Biological Physics and Chemisrty, 2022
The paper presents and discusses the results of experimental studies of the complex formation of iron ions with melanins isolated from forest beech chaga (faqus sylvatica) and birch chaga (betula), which exhibit high antioxidant activity. Melanins were isolated by alkaline extraction and precipitation in an acidic medium.
O. Bagirova, H. Gafarova, E. Bobrova, R. Bagirov   +3 more
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The Antibody Response to Fungal Melanin in Mice

The Journal of Immunology, 1998
Abstract Melanins are associated with virulence in several important human pathogens, but little is known about the immune response to this ubiquitous biologic compound. We hypothesized that melanin produced by the fungus Cryptococcus neoformans was immunogenic. C.
J D, Nosanchuk, A L, Rosas, A, Casadevall   +2 more
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Fungal melanin inhibitor and related compounds from Penicillium decumbens

Phytochemistry, 2002
Two polyketides, decumbenones A and B, and versiol were isolated from the culture filtrate of the fungus, Penicillium decumbens. Their respective structures were 1-(2,8-dihydroxy-1,2,6-trimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl)-3-hydroxy-1-propanone and 1-(2,8-dihydroxy-1,2,6-trimethyl-1,2,4a,5,6,7,8,8a-octahydronaphthalen-1-yl)-3-hydroxy-1 ...
Yuzo, Fujii, Masahiro, Asahara, Masakatsu, Ichinoe, Hiromitsu, Nakajima   +3 more
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Identification of fungal melanin production and the role of anti-melanin agents.

Pakistan journal of pharmaceutical sciences, 2023
Accumulation of melanin pigment in some specific areas of human skin leads to various skin disorders. This study includes melanin production and extraction from non-dermatophyte, filamentous fungi (Aspergillus niger). The effect of carbon, nitrogen, pH and temperature on melanin production was also observed.
Saba, Iqbal, Fatima, Ismail
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Fungal melanin detection by the use of copper sulfide-silver

Mycologia, 2005
Silver-staining procedures were investigated for their effectiveness in identifying cell wall-based fungal melanins in live and fixed plastic embedded samples, particularly 1,8-dihydroxynaphthalene (DHN) based polyketide melanins. We developed a simple and reliable melanin-staining technique based on a silver accumulation method originally published ...
M J, Butler, R B, Gardiner, A W, Day
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Characterization of the melanin pigment of a cosmopolitan fungal endophyte

Mycological Research, 2004
Phyllosticta capitalensis (teleomorph Guignardia mangiferae) occurs as a foliar endophyte in woody trees belonging to different families of both temperate and tropical regions. We isolated this endophyte from plants in different habitats, such as mangroves, dry deciduous forest, moist deciduous forest and semi-evergreen forest. This endophyte was found
Trichur S, Suryanarayanan, Jagadesa P, Ravishankar, Govindan, Venkatesan, Thokur S, Murali   +3 more
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Biochemical degradation of soil humic acids and fungal melanins

Organic Geochemistry, 2002
Studies were conducted to compare properties and biodegradation of fungal melanins from Aspergillus niger and Cladosporium cladosporiodes with those of humic acids from soils and brown coal. Compared to the humic acids the fungal melanins contained more functional groups, were less hydrophilic and had relatively high molecular weights.
Yu.A. Zavgorodnyaya, V.V. Demin, A.V. Kurakov   +2 more
openaire   +1 more source

[Antioxidant features of fungal melanin pigments].

Prikladnaia biokhimiia i mikrobiologiia, 2001
Fungal melanin pigments were shown to display a high antioxidant activity. An increase in the number of methyl substituents in benzidine molecules of melanins obtained from micromycetes and macromycetes was accompanied by a decrease in the efficiency of inhibition of peroxidase-catalyzed oxidation.
V V, Shcherba, V G, Babitskaia, V P, Kurchenko, N V, Ikonnikova, T A, Kukulianskaia   +4 more
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Role of melanin in fungal biosorption of tributyltin chloride

Applied Microbiology and Biotechnology, 1990
Intact biomass of an albino and a melanic strain of Aureobacidium pullulans, as well as purified melanin from the latter strain, was capable of tributyltin chloride (TBTC) removal from solution. Melanized biomass had a greater biosorptive capacity than albino biomass, this difference being attributable to the presence of melanin. Purified melanin had a
Gadd, G. M., Gray, D. J., Newby, P. J.
openaire   +2 more sources

Carbohydrate Content of Fungal Humic Acid‐type Polymers (Melanins)

Soil Science Society of America Journal, 1979
Abstract The carbohydrate contents of a variety of fungal humic acid‐type melanins ranged from 1.1 to 5.9%. Values were 1.7 to 2.6% for soil humic acids and 0.4% for Leonardite peat humic acid. Fungal culture medium polymers not precipitated by acid and fungal cells contained from 12 to 55% carbohydrates.
L. F. Linhares, J. P. Martin
openaire   +1 more source