Abstract
Mole crab (Emeria emeritus) has a distinctive composition of its shell structure that can harden and soften due to mineral and composition properties in the body itself. There is no preliminary information about the content and structure of E. emeritus, therefore the writing of this article was to understand the body and shell composition, elements and microstructure of E. emeritus. The scope of this research was divided into two parts, i.e body observation of E. emeritus showed that the greatest result were 40.03% of ash content, 8.74 g/100 g protein of glutamic acid, 6.42 g/100g protein of aspartic acid, 5.03 g/100 g fat of palmitic acid, and 3.23 g/100 g fat of omega-9. Another scope of its shell showed 55.24% of crystal purity phase was magnesium calcite in Lattice rhombohedral form on the highest peak angle at 29,76° and the lowest at 23.3°, 36,35°, 39.85°, 43.63°, 48.16°, and 49.11°. Besides, it was found ±37.32% of oxygen element, ±32.06% of carbon, ±15.09% of calcium, 8.74% of nitrogen, ±2.18% of magnesium, 0.36% of aluminum, 0.63% of phosphorus, and 0.47% of sodium. Functional groups in the absorption spectrum bands were followed by magnesium calcite at 1030 cm-1, 874 cm-1, and region of 700 cm-1 to 400 cm-1, while O-H amine groups at 3402 cm-1, 1657 cm-1 and 1412 cm-1. In addition, low spectrum band demonstrated connection with Al, Mg, Si and Na in the region of 1155 cm-1 to 928 cm-1. In microstructure found four main layers consisting of epicuticle, exocuticle, endocuticle, and epidermis layer, which has common structure generally.
Published Version
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