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Showing 1 to 20 of 113 for “"Melanin"”.
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Computational modeling of melanin aggregation
Eumelanin is a member of the melanin family. It is a highly heterogeneous polymer composed of 5,6-dihydroxyindole-2-carboxylic acid (DHICA) and 5,6-dihydroxyindole (DHI) building blocks, of which DHICA is reported as the more abundant in natural eumelanin while DHI being more common in synthetic …
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Tyrosinase and Melanin Pigmentation in Azotobacter Chroococcum
Made available in DSpace on 2014-12-05T21:45:30Z (GMT). No. of bitstreams: 1 5900534.pdf: 2458013 bytes, checksum: 3302b07bb626ef937514100c5a772253 (MD5) Previous issue date: 1958
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Chemical studies of melanin pigment and their genetic interpretation
LD2668 .T4 1942 B31
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A melanin termelés jelentősége az Aspergillus nidulans szénéhező tenyészeteiben
… ezen autolizáló tenyészetekben megfigyelhető melanin termelésének a szerepe, védelmi hatásának vizsgálata a még élő sejteknél ezen sejtfalbontó enzimekkel szemben.
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Preliminary characterisation of the neuropeptide melanin concentrating hormone in humans
Melanin concentrating hormone (MCH) is an orexigenic neuropeptide expressed centrally in the zona incerta and lateral hypothalamus. Evidence from rodent studies implicates hypothalamic MCH in the modulation of varied and diverse physiological functions most notably in energy homeostasis but also …
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Melanin-independent accumulation of turgor pressure in appressoria of Phakopsora pachyrhizi
… penetration of hyphae through the epidermis. Melanin functions as an impermeable barrier to osmolytes, which allows appressoria to accumulate high turgor pressure. Deficiency of melanin in appressoria reduces turgor pressure and compromises the infection process. In Phakopsora pachyrhizi, the …
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The physiological role and characterization of melanin produced by Shewanella algae BrY
… BrY produces the quinone rich heteropolymer, melanin, when grown with tyrosine. The redox-cycling capabilities of melanin provide it with the ability to serve as a terminal electron acceptor and soluble electron shuttle for iron mineral reduction. When melanin is associated with the cell …
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The synthesis and characterization of alginate-melanin hydrogels for applications in forensic science
… behavior at crime scenes. We present alginate-melanin hydrogels as candidate forensic skin simulants, characterizing their optical and mechanical properties. We investigated encapsulated and crosslinked hydrogel systems. Synthetic melanin was modified by introducing alkynyl moieties for …
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Molecular and functional characterization of the melanin biosynthetic genes from Vibrio cholerae 569B
… the synthesis of a brown-black pigment known as melanin. The function of the pigment and the genes involved in its synthesis was unknown. We therefore set out to determine the function of pigmentation in V. cholerae 569B, since pigmentation could significantly enhance the survival of the …
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Neurochemical and functional characterisation of the Melanin-concentrating hormone system in the rat brain
The central melanin-concentrating hormone (MCH) system has been intensively studied for its involvement in the regulation of feeding behaviour and body weight regulation. The importance of the neuropeptide MCH in the control of energy balance has been underlined by MCH knock out and …
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Molecular characterization and effect of diagenesis and maturation of melanin in the fossil record
Despite the fact that melanin is a ubiquitous pigment found in bacteria, fungi, plants and animals, little is known about its chemical preservation and distribution in the fossil record. Melanins are polymeric phenolic compounds classified into two major groups based in their chemical structures …
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The role of melanin production in the survival of Vibrio cholerae in the marine environment
The marine bacterium Vibrio cholerae produces pyomelanin through the catabolism of L-tyrosine to homogentisic acid. Various types of melanins are used by microbes as defense mechanisms against a variety of environmental stresses. This thesis investigated the defensive role of V. cholerae pyomelanin …
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Deterination of the melanin content in the skin of albinos at the University Teaching Hospital, Lusaka, Zambia
BACKGROUND: Melanin is a skin pigment that determines skin colour and plays a role in photoprotection. It represents one of the most visible markers of human variation and skin disorders. Lack of Melanin or presence of very little melanin or albinism makes the skin susceptible to a wide range of …
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Deterination of the melanin content in the skin of albinos at the University Teaching Hospital, Lusaka, Zambia
BACKGROUND: Melanin is a skin pigment that determines skin colour and plays a role in photoprotection. It represents one of the most visible markers of human variation and skin disorders. Lack of Melanin or presence of very little melanin or albinism makes the skin susceptible to a wide range of …
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Melanin as an Oto-Protective Pigment in Two Fish Species: <i> Poecilia Latipinna </i> and <i>Cyprinus Carpio </i>
<p>Melanin is the dark pigment found in most organisms that gives color to the skin, hair, feathers, and eyes of vertebrates. While melanin is known to also be present in the stria vascularis of the mammalian cochlea, its function in the inner ear is still unknown. Some previous studies have …
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Melanin-Concentrating Hormone Receptor-1 is Enriched in Lipid Rafts and the Effects of Lipid Raft Integrity on Receptor Signaling
The melanin-concentrating hormone receptor-1 (MCHR-1) is a member of the G protein-coupled receptor (GPCR) superfamily, and functions in the regulation of food consumption and energy metabolism. MCHR-1 is expressed in neural, pancreatic, and fat tissue. Fat cells begin their journey as …
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Identification and biophysical characterization of two intralysosomal pigments with free-radical properties and their synthetic models: Human neuromelanin and the minocycline-induced thyroid pigment
Melanins are complex, incompletely understood polymeric pigments which uniquely contain a stable population of organic free radicals amenable to study by electron paramagnetic resonance (EPR, or equivalently, electron spin resonance, ESR) spectroscopy. In contrast to the usual histochemical tests, …
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