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. 2015 Jun 6;12(107):20150226. doi: 10.1098/rsif.2015.0226

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© 2015 The Author(s) Published by the Royal Society. All rights reserved.

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Figure 2. — XPS measurements of sundew adhesive. (a) XPS wide spectra of sundew adhesive, chitosan, cellulose, alginate and pectin. (b) C 1 s narrow spectra of sundew adhesive, chitosan, cellulose, alginate and pectin. The C 1 s spectra of sundew adhesive were fitted into three Gaussian components, using ‘Multi-peaks’ function of Origin Pro 9.0. (c) N 1 s narrow spectra of sundew adhesive and chitosan. (d) S 2 s narrow spectra of chitosan and adhesive secreted by D. capensis and D. spatulata. (e) A schematic drawing of the proposed ‘egg-box’ model for pectin and calcium alginate. (Online version in colour.)