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Structural, compositional and spectral investigation of prawn exoskeleton nanocomposite: UV protection from mycosporine-like amino acids

Hadagalli, K and Kumar, R and Mandal, S and Basu, B (2020) Structural, compositional and spectral investigation of prawn exoskeleton nanocomposite: UV protection from mycosporine-like amino acids. In: Materials Chemistry and Physics, 249 .

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Official URL: https://dx.doi.org/10.1016/j.matchemphys.2020.1230...

Abstract

The present work explores the use of marine resourced prawn exoskeleton/shell as a new class of naturally occurring composite containing UV absorbing proteins. Mycosporine-like amino acids with a central aromatic ring in the exoskeleton/shell of naturally occurring prawns (Fenneropenaeus Indicus) offer excellent UV protection. The architecture of shell composite constitutes a matrix of chitin-proteins with distinct reinforcements such as spherical calcites (CaCO3), microscopic proteins, and traces of hydroxides/oxides of magnesium. The presence of tryptophan, phenylalanine, and tyrosine, forming the basic building blocks of mycosporines, is confirmed by structural, compositional, and microscopic studies on prawn shells. The UV spectroscopic signatures at 290 and 320 nm provides strong evidence for the highest UV absorption. UV absorption attributes to the presence of mycosporine-like amino acids. Hence, the current exploration of naturally occurring prawn shells directs towards an additive-free sunscreen filter without the generation of detrimental free radicals. © 2020 Elsevier B.V.

Item Type: Journal Article
Additional Information: The copyright of this article belongs to ELSEVIER SCIENCE SA
Keywords: Absorption spectroscopy; Calcite; Calcium carbonate; Composite materials; Free radicals; Light absorption; Proteins; Shells (structures); Ultraviolet spectroscopy, Basic building block; Microscopic study; Mycosporine-like amino acids; Mycosporines; Naturally occurring; Prawn shells; Spectroscopic signatures; UV absorption, Amino acids
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Interdisciplinary Research > Centre for Biosystems Science and Engineering
Depositing User: Id for Latest eprints
Date Deposited: 10 Jul 2020 10:45
Last Modified: 10 Jul 2020 10:45
URI: http://eprints.iisc.ac.in/id/eprint/65105

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