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Cited by 503

The DOI matches its Crossref record; 13 of the 13 references it cites were found in a registry or an index.

Evidence for Egg-Box-Compatible Interactions in Calcium−Alginate Gels from Fiber X-ray Diffraction

Open access
Sikorski, Pawel, Mo, Frode, Skjåk-Bræk, Gudmund, Stokke, Bjørn T.·2007·Biomacromolecules

Abstract

The structures of guluronic-acid-rich alginate in the acid and calcium forms were investigated using fiber X-ray diffraction. Data recorded for alginate fibers in the acid form show a repeat along the chain axis of c = 0.87 nm, a value that is in agreement with the one measured by Atkins et al. (Biopolymers 1973, 12, 1865) and contradicts a repeat of 0.78 nm recently suggested by Li et al. (Biomacromolecules 2007, 8, 464). In the Ca2+ form, our observations indicate that the junction zone involves dimerization of polymer chains through Ca2+ coordination according to the egg-box model. For reasons that are not understood at present, coordination of the divalent cations reduces the ability for the lateral crystallographic packing of the dimers. A proposed model for the junction zone involves polymer chains packed on a hexagonal lattice with a lattice constant a = 0.66 nm. Random pairs of chains form dimers through coordination of Ca2+ cations. Further lateral interaction between dimers is mediated by disordered Na+ and Ca2+ cations, water molecules, and hydrogen bonding.

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Crossref · 10.1021/bm0701503

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Cites

Research works printed but not linked: 9

  1. Valla S., 1996, Agro−Food−Ind. Hi-Tech, 7, 41
  2. Rehm B. H. A., 1997, Appl. Microbiol. Biotechnol., 48, 288
  3. Donati I., 2005, Biomacromolecules, 6, 1040
  4. Li L., 2007, Biomacromolecules, 8, 468
  5. Arnott S., 2000, Fibre Diffr. Rev., 36, 44
  6. Stokke B. T., 1997, Macromol. Symp.
  7. Cochran W., 1952, Acta Crystallogr., 5, 586
  8. Franklin R. E., 1955, Acta Crystallogr., 8, 780
  9. Knupp C., 2004, J. Appl. Crystallogr., 37, 835, 10.1107/S0021889804016048 · doi:10.1107/s0021889804016048

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Metadata

Authors
Sikorski, P., Mo, F., Skjåk-Bræk, G., & Stokke, B. T.
Venue
Biomacromolecules
Published
2007-05-27
Volume
8
Issue
7
Pages
2098-2103
ISSN
  • 1525-7797 (ISSN-L)
  • 1526-4602
OpenAlex
W2094100188
Cited by
503
References
13
FWCI
14.92
Type
journal article
Language
en
Open access
green

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