NDLI: Marine sponge melanin: a new source of an old biopolymer

Content Provider	Springer Nature Link
Author	Araujo, Marco Xavier, Joana R. Nunes, Carla D. Vaz, Pedro D. Humanes, Madalena
Copyright Year	2011
Abstract	Various types of melanin have already been found in the majority of organisms, being this biopolymer considered as one of the major pigments present in nature. The presence of this pigment in marine sponges (Phylum Porifera, one of the simplest multicellular organisms) was postulated, but never characterized. In this context this work aims the extraction and characterization of a dark pigment observed in four different marine sponges species (Erylus mamillaris, Erylus discophorus var. deficiens, Pachymatisma johnstonia, Dercitus bucklandi). Characterization of the extracted biopolymer was performed using solid state analytical techniques, due to the characteristic non-solubility of melanin. Therefore, characterization techniques like SEM–EDS, IR, UV–vis, MALDI-MS, elemental analysis and X-ray powder diffraction (XRD) were used to identify the biopolymer. The results showed that the extracted material was obtained with high purity, being identified as melanin. The results also emphasize a large structure variability present in this pigment, showing different structure arrangements and composition depending on its source, which influences the UV behaviour. The structural characterization of this class of pigments is fundamental, allowing a better understanding of melanin properties.
Starting Page	115
Ending Page	122
Page Count	8
File Format	PDF
ISSN	10400400
Journal	Structural Chemistry
Volume Number	23
Issue Number	1
e-ISSN	15729001
Language	English
Publisher	Springer US
Publisher Date	2011-08-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Melanin Porifera Biopolymer Photoprotection Theoretical and Computational Chemistry Computer Applications in Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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