Spectroscopic characterization of biogenic silica
Spectroscopic characterization of biogenic silica
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DOI：
10.1016/s0022-3093(02)01634-4
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发表时间：
2003-02-01
影响因子：
3.5
通讯作者：
Livage, J
中科院分区：
文献类型：
--
作者：
Gendron-Badou, A;Coradin, T;Livage, J
通过 FTIR 和 MAS-NMR 光谱研究了无定形生物二氧化硅。硅藻化石和海绵骨针表现出高度浓缩和组织良好的二氧化硅，而活体硅藻的硅藻壳的浓缩程度要低得多，这表明在二氧化硅的成岩演化过程中，化石化过程中仍然会发生一些浓缩过程。此外，活体硅藻的二氧化硅网络似乎与细胞的生物有机成分相关，这与生物硅化机制一致，表明某些蛋白质或多糖有利于二氧化硅的形成。 (C) 2003 Elsevier Science B.V. 保留所有权利。
Amorphous biogenic silicas were studied by FTIR and MAS-NMR spectroscopy. Fossil diatom frustules and sponge spicules exhibit a highly condensed and well-organised silica whereas the silica frustule of living diatoms is much less condensed, suggesting that some condensation process still happens upon fossilisation during the diagenetic evolution of silica. Moreover, the silica network of living diatoms appears to be linked to the bio-organic components of the cell, in agreement with the biosilicification mechanisms suggesting that some proteins or polysaccharides favour the formation of silica. (C) 2003 Elsevier Science B.V. All rights reserved.