TY - JOUR
T1 - Molecular modeling of xanthan:Galactomannan interactions
AU - Chandrasekaran, R.
AU - Radha, A.
N1 - Funding Information:
This work was supported in part by the Industrial Consortium of the Whistler Center for Carbohydrate Researcha; nd The NutraSweetK elco Company,a Unit of Monsanto.
PY - 1997
Y1 - 1997
N2 - 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.
AB - 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.
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U2 - 10.1016/S0144-8617(97)00007-6
DO - 10.1016/S0144-8617(97)00007-6
M3 - Article
AN - SCOPUS:0031096750
SN - 0144-8617
VL - 32
SP - 201
EP - 208
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
IS - 3-4
ER -