Morris, Gordon, Patel, T. R., Picout, D. R., Ross-Murphy, S. B., Ortega, A., Garcia de la Torre, J. and Harding, S. E. (2008) Global hydrodynamic analysis of the molecular flexibility of galactomannans. Carbohydrate Polymers, 72 (2). pp. 356-360. ISSN 0144-8617
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In the past, intrinsic viscosity and sedimentation velocity analyses have been used separately to assess the conformation and flexibility of guar and locust bean gum galactomannans based on worm-like chain and semi-flexible coil models. Publication of a new global method combining data sets of both intrinsic viscosity and sedimentation coefficient with molecular weight, and minimising a target (error) function now permits a more robust analysis. Using this approach, values for the persistence length of (10 Â± 2) nm for guar and (7 Â± 1) nm for locust bean gum are returned if the mass per unit length ML is floated as a variable. Using a fixed mass per unit length based on the known compositional data of each galactomannan yields a similar value for Lp in both cases, (8 Â± 1) nm for guar and (9 Â± 1) nm for locust bean gum, with combined set of data yielding (9 Â± 1) nm: within experimental error the flexibilities of both galactomannans are very similar. Â© 2007 Elsevier Ltd. All rights reserved.▼ Jump to Download Statistics
|Uncontrolled Keywords:||Galactomannan Guar LBG Mass per unit length Persistence length Semi-flexible coil Worm-like chain Data structures Hydrodynamics Mathematical models Robust control Viscosity Galactomannans Intrinsic viscosity Molecular flexibility Sedimentation Cyamopsis tetragonoloba|
|Subjects:||Q Science > QD Chemistry|
|Schools:||School of Applied Sciences|
Language of Original Document: English
|Depositing User:||Gordon Morris|
|Date Deposited:||18 Sep 2012 14:32|
|Last Modified:||18 Sep 2012 14:32|
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