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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: FEBS J. 2012 Apr 17;279(10):1710–1720. doi: 10.1111/j.1742-4658.2012.08531.x

Figure 3.

Figure 3

Figure 3

Methods used for characterisation of silica species in solution and in the solid state. A: nitrogen gas adsorption analysis of a fumed silica(small particles treated at high temperature); grey lines and a silicalite; black lines. B: ESI/MS mass spectrometric data for a solution of silica (30 mM dm-3) dissolved in a 12.5% wgt/vol solution of tetramethylammonium hydroxide after heating to 60°C for 8 hours to aid solubility. C:scanning electron microscopy images of silica extracts from Curcurbita (marrow) leaves. D: solid state 29Si nmr of silicon species in Q° to Q4 coordination environments.