Results 131 to 140 of about 43,526 (158)
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Metal ion content in Sepia officinalis melanin
Marine Chemistry, 1992Abstract A dissolution procedure for the analysis of the metal content in Sepia officinalis melanin has been optimized and checked against a bovine liver Community Bureau of Reference (BCR) certified reference material. The content of several metal ions has been determined by GF-AAS and ICP-AES techniques in samples of Sepia officinalis melanin ...
SARZANINI, Corrado +4 more
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OPTICAL AND THERMAL CHARACTERIZATION OF NATURAL (Sepia officinalis) MELANIN
Photochemistry and Photobiology, 1994Abstract The optical properties and the thermal diffusivity of natural cuttlefish (Sepia officinalis) melanin have been measured. The optical absorption and scattering properties of melanin particles were determined at 580 nm and 633 nm, using photometric and photothermal techniques.
I A, Vitkin +3 more
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Ion‐Exchange and Adsorption of Fe(III) by Sepia Melanin
Pigment Cell Research, 2004Sepia eumelanin is associated with many metal ions, yet little is known about its metal binding capacity and the chemical nature of the binding site(s). Herein, the natural concentrations of metal ions are presented and the ability to remove metals by exposure of the melanin granules to EDTA is quantified. The results reveal that the binding constants
Yan, Liu +5 more
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Photoprotection of Mammalian Acid-Soluble Collagen by Cuttlefish Sepia Melanin In Vitro
Photochemistry and Photobiology, 1998AbstractSeveral important clinical conditions can result in close association between the pigment melanin and dermal collagen. Because melanin and its precursors can be chemically reactive in ground and excited states, it is important to know whether the resulting melanin‐collagen interaction results in photoprotection or photoaggression.
J M, Menter +4 more
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Sepia Melanin for the Local Deactivation of Matrix Metalloproteinases
ACS Macro LettersMatrix metalloproteinases (MMPs) are a family of zinc-dependent enzymes that degrade the extracellular matrix and play essential functions in wound healing and tissue remodeling. However, the long-term overexpression of MMPs is associated with a chronic wound environment.
Seth D. Edwards +3 more
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The Absorbance of Physiological Melanin and Sepia at 4.0 to 20.0 THz
2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)Zoltan Vilagosh, Andrew Wood
exaly +2 more sources
Journal of Chemical Neuroanatomy, 2015
Parkinson's disease is characterised pathologically by a relatively selective death of dopaminergic neurons in the substantia nigra of the brain. The vulnerability of these neurons appears to be linked to the pigment neuromelanin. However, as yet there is limited understanding behind the mechanisms of this disease process.
Rhiannon L, Schroeder +2 more
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Parkinson's disease is characterised pathologically by a relatively selective death of dopaminergic neurons in the substantia nigra of the brain. The vulnerability of these neurons appears to be linked to the pigment neuromelanin. However, as yet there is limited understanding behind the mechanisms of this disease process.
Rhiannon L, Schroeder +2 more
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Pigment Cell Research, 2003
The structure of melanin extracted from the ink sac of the cuttlefish Sepia officinalis was examined for different methods of isolation and purification of the pigment. Scanning electron microscopy (SEM) images of Sepia eumelanin prepared by different procedures establish that multi‐μm‐sized aggregates reported by previous workers are generated by ...
Yan, Liu, John D, Simon
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The structure of melanin extracted from the ink sac of the cuttlefish Sepia officinalis was examined for different methods of isolation and purification of the pigment. Scanning electron microscopy (SEM) images of Sepia eumelanin prepared by different procedures establish that multi‐μm‐sized aggregates reported by previous workers are generated by ...
Yan, Liu, John D, Simon
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Photon absorption in step-wise multi-photon activation fluorescence (SMPAF) of Sepia melanin
SPIE Proceedings, 2013Previous research has shown that melanin goes through a step-wise three-photon absorption process when the fluorescence is activated with high laser intensity. We have conducted further research using even higher laser intensity for the activation, and have shown the possibility of observing power dependence other than third-order.
Zhenhua Lai +2 more
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Regulating Sepia melanin agglomerates using tailored kaolinite to accelerate skin wound healing
Colloids and Surfaces B: BiointerfacesUncontrolled hemorrhage and wound healing difficulties are significant challenges in medical care. Wounds that fail to close within a limited time frame are often associated with continuous hemorrhage, hard-to-treat infections, and chronic conditions.
Zongwang Huang +6 more
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