Vacuum ultraviolet circular dichroism of gellan-family polymer films from water and dimethyl sulfoxide

Carbohydrate Research
E R Arndt, E S Stevens

Abstract

The denaturing effect of dimethyl sulfoxide (Me2SO) on the conformation of the gellan-welan-rhamsan family of microbial polysaccharides is directly demonstrated by circular dichroism (CD). The three polysaccharides display strikingly similar CD spectra (140-210 nm) for films cast from Me2SO. The disrupting effect of Me2SO on gellan and welan conformations has previously been reported by others on the basis of light-scattering and viscosity studies. Films cast from aqueous solutions at room temperature show more-intense CD bands, both at 182 nm, as is also observed for aqueous solutions, and in the 150-175 nm region. These features correspond to the ordered helical chains found by X-ray diffraction studies of similarly prepared films.

References

Mar 16, 1977·Journal of the American Chemical Society·L A BuffingtonE A Balazs
Feb 7, 1992·Carbohydrate Research·R ChandrasekaranV G Thailambal
Feb 7, 1992·Carbohydrate Research·J D Stankowski, S G Zeller
Jan 1, 1990·Biopolymers·M MilasM Rinaudo
Nov 1, 1994·Biopolymers·E R Arndt, E S Stevens
Jan 15, 1994·Carbohydrate Research·R ChandrasekaranE J Lee

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Citations

Feb 11, 2014·International Journal of Biological Macromolecules·Varinder KaurJ F Kennedy
Sep 2, 2009·Chirality·Ettore CastiglioniSergio Abbate
Jun 19, 2012·Macromolecular Bioscience·Hongwei DuNathan Ravi

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