Bivalve shell structure and organic matrix

Kobayashi, Ichiro; Samata, Tetsuro

doi:10.1016/j.msec.2005.09.101

Cited by 85 publications

(41 citation statements)

References 12 publications

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“…The greater part of the golden mussel's shell structure is constituted of the polymorph aragonite, which is microstructurally organized in the form of superimposed sheets (Figure 5a, b) -the aragonite sheet nacreous layer 6 (≈120µm) -and in the form of prisms (Figure 5c, d) -the aragonite prismatic layer 6 (≈26µm). Contrary to other bivalves 5,7,18,23,24 the prismatic layer in the L. fortunei is located in the internal part of the shell and is composed of aragonite.…”

Section: Scanning Electron Micrographsmentioning

confidence: 99%

“…Environmental pressures select more efficient structures and manufacturing processes. The Materials Engineering lend to Biology its knowledge and tools, assisting in the search for understanding how biological materials affect the survival of organisms [6][7][8][9][10][11][12] . The Limnoperna fortunei, or golden mussel, is a freshwater bivalve, native to Southeast Asia.…”

Section: Introductionmentioning

confidence: 99%

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Polymorphism of CaCO3 and microstructure of the shell of a Brazilian invasive mollusc (Limnoperna fortunei)

Nakamura¹,

Almeida²,

Riera³

et al. 2014

Mat. Res.

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Applying the theories of Materials Science and Engineering to describe the composition and hierarchy of microstructures that comprise biological systems could help the search for new materials and results in a deeper insight into evolutionary processes. The layered microstructure that makes up the freshwater bivalve Limnoperna fortunei shell, an invasive specie in Brazil, was investigated utilizing SEM and AFM for the determination of the morphology and organization of the layers; and XRD was used to determine the crystalline phases of the calcium carbonate (CaCO 3 ) present in the shell. The presence of the polymorphs calcite and aragonite were confirmed and the calcite is present only on the external side of the shell. The shell of L. fortunei is composed of two layers of aragonite with distinct microstructures (the aragonite prismatic layer and the aragonite sheet nacreous layer) and the periostracum (a protein layer that covers and protects the ceramic part of the shell). A new morphology of the calcite layer was found, below the periostracum, without defined form, albeit crystalline.

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Section: Scanning Electron Micrographsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymorphism of CaCO3 and microstructure of the shell of a Brazilian invasive mollusc (Limnoperna fortunei)

Nakamura¹,

Almeida²,

Riera³

et al. 2014

Mat. Res.

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show abstract

“…Molluskan shells adopt various microstructures, which have been classified into a number of types such as prismatic, nacreous, foliated, crossed lamellar, and homogeneous (Bøggild, 1930;Taylor et al, 1969;Carter, 1990;Chateigner et al, 2000;Kobayashi and Samata, 2006). It is often observed that a shell consists of several types of microstructures that form multi-layered structures.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic characterization of the crossed lamellar structure in the bivalve Meretrix lamarckii using electron beam techniques

Hayashi

Yokoo

Nakamura

et al. 2011

Journal of Structural Biology

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“…This fact suggests the particle size may affect the reaction rate, but it is not proportion to the surface area of shell particles estimated from the range of particle size. The reason may be that the structure of the Mizuhopecten yessoensis shells is a pile of calcium carbonate and collagen layers [35]. This makes anisotropy forming channels for phosphate to penetrate inside of a particle as shown in Fig 3(a), while the break of the particles occurs along the channels resulting in slight increase in the number of accessible channels.…”

Section: Ca/p In the Precipitate On The Surfacementioning

confidence: 99%

Phosphate Recovery from Synthetic Urine with Shell of <i>Mizuhopecten yessoensis</i>

Ito

Funamizu

2016

J. of Wat. & Envir. Tech.

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ABSTRTRACTCalcium phosphate can precipitate from phosphate in urine and calcium carbonate, which is the main component of Mizuhopecten yessoensis shells. Precipitation tests, analyses of SEM-EDS and XRD were carried out to study the formation of calcium phosphate from the shells and synthetic urine, to identify the products, and to investigate the effect of operation conditions on the form of the obtained products. Two precipitation processes were observed at low Ca/P and at high Ca/P ratios. The former involved an increase in pH and a decrease in concentrations of phosphate and calcium to form dicalcium phosphate dihydrate (DCPD), while the latter involved three steps: 1. a rapid increase in pH and a decrease in the concentrations of phosphate and calcium to form DCPD, 2. a decrease in pH and an increase in the phosphate concentration, causing to change the crystal structure into poorly crystallized apatite, and 3. an increase in pH. The observations of the particle surface by SEM-EDS and powder XRD analysis of precipitates were consistent with these phenomena. Elemental analysis of the cross section of particles showed that the reaction that formed calcium phosphate started from the particle surface and then progressed to inside the particles.

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Bivalve shell structure and organic matrix

Cited by 85 publications

References 12 publications

Polymorphism of CaCO3 and microstructure of the shell of a Brazilian invasive mollusc (Limnoperna fortunei)

Polymorphism of CaCO3 and microstructure of the shell of a Brazilian invasive mollusc (Limnoperna fortunei)

Crystallographic characterization of the crossed lamellar structure in the bivalve Meretrix lamarckii using electron beam techniques

Phosphate Recovery from Synthetic Urine with Shell of <i>Mizuhopecten yessoensis</i>

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