期刊
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
卷 159, 期 3, 页码 131-139出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cbpb.2011.03.001
关键词
Mollusc shells; Microstructure; Organic components; EPMA; TOF-SIMS mass spectrometry imaging; Amino acids
资金
- ANR [ANR-07-NANO-061-03]
- European Science Foundation (ESF) of the European Commission [ERAS-CT-2003-980409]
- European Union [LSHG-CT2005-518194 COMPUTIS]
The nacre prism transition of the mollusc shell Pinctada margaritifera was studied using scanning electron microscopy, electron probe micro-analysis (EPMA) and time-of-flight secondary ion mass spectrometry (TOF-SIMS). Mineralogical change is correlated with a change in organic matrix. Previous analyses had shown that sugars were involved in the transition layer (fibrous aragonite). The new Energy Dispersive Spectrometry (EDS) and TOF-SIMS maps show that the modifications at the layer boundary are complex, and that proteins and lipids are also involved. Detailed TOF-SIMS maps show that the thick organic envelopes surrounding the prisms, and between the prisms and the fibrous aragonitic layer, are not composed by regular layers, but are a patchwork of various molecules. The amino acid compositions of the nacreous and prismatic layer are compared thanks to the TOF-SIMS localized analyses. (C) 2011 Elsevier Inc. All rights reserved.
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