Results 201 to 210 of about 5,601 (234)
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The International Journal of Biochemistry & Cell Biology, 1997
Melanin is an irregular light-absorbing polymer containing indoles and other intermediate products derived from the oxidation of tyrosine. Melanin is widely dispersed in the animal and plant kingdoms. It is the major pigment present in the surface structures of vertebrates.
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Melanin is an irregular light-absorbing polymer containing indoles and other intermediate products derived from the oxidation of tyrosine. Melanin is widely dispersed in the animal and plant kingdoms. It is the major pigment present in the surface structures of vertebrates.
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Current Opinion in Infectious Diseases, 2003
Production of melanin has been associated with virulence in diverse microorganisms. Melanization of fungi has been noted for many years in predominantly subcutaneous infections such as chromoblastomycosis and more recently most extensively studied in a yeast causing systemic infection, Cryptococcus neoformans. Pigmented fungi are increasingly important
Beatriz L, Gómez, Joshua D, Nosanchuk
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Production of melanin has been associated with virulence in diverse microorganisms. Melanization of fungi has been noted for many years in predominantly subcutaneous infections such as chromoblastomycosis and more recently most extensively studied in a yeast causing systemic infection, Cryptococcus neoformans. Pigmented fungi are increasingly important
Beatriz L, Gómez, Joshua D, Nosanchuk
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Nature, 1964
AQUEOUS systems were reported earlier in which a manganese-phenothiazine auto-oxidation led to the emergence of semiquinone free-radicals of the drugs1. The mildness of the required conditions permitted the postulation that this interaction might be relevant to the pharmacological action of these agents2.
G C, COTZIAS +2 more
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AQUEOUS systems were reported earlier in which a manganese-phenothiazine auto-oxidation led to the emergence of semiquinone free-radicals of the drugs1. The mildness of the required conditions permitted the postulation that this interaction might be relevant to the pharmacological action of these agents2.
G C, COTZIAS +2 more
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Biophysics, 2013
Treatment of catechol, pyrogallol, DOPA, dopamine, norepinephrine, and natural polyhydroxy-1,4-naphthoquinone echinochrome by aqueous solution of potassium superoxide (KO2) in the presence of CaCl2 leads to the formation of water-insoluble dark pigments with stable paramagnetic properties ("calcium melanins").
A V, Lebedev +3 more
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Treatment of catechol, pyrogallol, DOPA, dopamine, norepinephrine, and natural polyhydroxy-1,4-naphthoquinone echinochrome by aqueous solution of potassium superoxide (KO2) in the presence of CaCl2 leads to the formation of water-insoluble dark pigments with stable paramagnetic properties ("calcium melanins").
A V, Lebedev +3 more
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2016
Abstract MCH was originally discovered as a cyclic neuropeptide in the chum salmon pituitary. MCH is secreted from the pituitary into the circulation, and is responsible for aggregating melanin granules in teleost fishes. Mammalian MCH was subsequently identified in the rat hypothalamus.
Hiroshi, Nagasaki, Yumiko, Saito
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Abstract MCH was originally discovered as a cyclic neuropeptide in the chum salmon pituitary. MCH is secreted from the pituitary into the circulation, and is responsible for aggregating melanin granules in teleost fishes. Mammalian MCH was subsequently identified in the rat hypothalamus.
Hiroshi, Nagasaki, Yumiko, Saito
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Nature, 1947
IT has been suggested recently1 that 5 : 6: 5â:6â-tetrahydroxy-indigo (I), or a quinone or semi-quinone derived from it, is an important constituent of melanin, the black pigment produced by the oxidation of tyrosine and 3 : 4-dihydroxyphenylalanine2.
J, HARLEY-MASON, G R, CLEMO, J, WEISS
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IT has been suggested recently1 that 5 : 6: 5â:6â-tetrahydroxy-indigo (I), or a quinone or semi-quinone derived from it, is an important constituent of melanin, the black pigment produced by the oxidation of tyrosine and 3 : 4-dihydroxyphenylalanine2.
J, HARLEY-MASON, G R, CLEMO, J, WEISS
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Pigment Cell Research, 1988
Extra‐cutaneous melanocytes derive from either the neural crest, the outer wall of the optic cup, or the cranial neural tube. Those of neural crest origin reach most bodily regions, and may give rise to primary melanoma in various tissues. The Kupffer cell produces a form of melanin, but is hardly a melanocyte.
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Extra‐cutaneous melanocytes derive from either the neural crest, the outer wall of the optic cup, or the cranial neural tube. Those of neural crest origin reach most bodily regions, and may give rise to primary melanoma in various tissues. The Kupffer cell produces a form of melanin, but is hardly a melanocyte.
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Archives of Dermatology, 1986
To the Editor.— Good theories should give way to better theories, and even good theories may become untenable as new information is discovered. Periodic questioning of dogma is a useful way to reevaluate dogma, lest we be complacent with obsolete conclusions. The article by Warwick L.
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To the Editor.— Good theories should give way to better theories, and even good theories may become untenable as new information is discovered. Periodic questioning of dogma is a useful way to reevaluate dogma, lest we be complacent with obsolete conclusions. The article by Warwick L.
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New England Journal of Medicine, 1961
T B, FITZPATRICK, M, SEIJI, A D, McGUGAN
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T B, FITZPATRICK, M, SEIJI, A D, McGUGAN
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