Molecular modeling of xanthan: Galactomannan interactions

R. Chandrasekaran, A. Radha

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

X-ray diffraction patterns from stretched fibers of xanthan, guaran and the complex between the two are indicative of good orientation and reasonable crystallinity. The ordered structures of xanthan and guaran appear to be a 5-fold helix of pitch 47.4Å and a 2-fold helix of pitch 10.3 Å, respectively. The diffraction pattern of the complex is a hybrid of those of the individual components. Both xanthan and guaran in the complex may adopt cellulose-like helices having a slightly longer pitch of 10.5 Å and form a non-coaxial duplex. Alternately, the complex may adopt a xanthan-like, coaxial, 5-fold, double helix in which one strand is xanthan and the other is guaran. The association of a pair of these hybrid helices can take place by direct cross linking of the carboxylate groups in the side chains of xanthan by divalent ions. The morphologies of these arrangements have now been visualized by computer modeling.

Original languageEnglish (US)
Pages (from-to)201-208
Number of pages8
JournalCarbohydrate Polymers
Volume32
Issue number3-4
StatePublished - Mar 1997

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guar gum
Molecular modeling
xanthan gum
Diffraction patterns
Cellulose
X ray diffraction
Fibers
Ions
crosslinking
X-ray diffraction
X-Ray Diffraction
galactomannan
cellulose
dietary fiber
ions

ASJC Scopus subject areas

  • Food Science
  • Biochemistry

Cite this

Molecular modeling of xanthan : Galactomannan interactions. / Chandrasekaran, R.; Radha, A.

In: Carbohydrate Polymers, Vol. 32, No. 3-4, 03.1997, p. 201-208.

Research output: Contribution to journalArticle

Chandrasekaran, R & Radha, A 1997, 'Molecular modeling of xanthan: Galactomannan interactions', Carbohydrate Polymers, vol. 32, no. 3-4, pp. 201-208.
Chandrasekaran, R. ; Radha, A. / Molecular modeling of xanthan : Galactomannan interactions. In: Carbohydrate Polymers. 1997 ; Vol. 32, No. 3-4. pp. 201-208.
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