Helix–coil transition of gelatin: helical morphology and stability
- 10 January 2008
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Soft Matter
- Vol. 4 (3), 544-549
- https://doi.org/10.1039/b713075a
Abstract
By combining optical rotation with thermal characterization and rheological measurements, we have studied triple helix formation in water and ethylene glycol solutions of gelatin. We find the enthalpy change per unit helix required for the transition from triple helix to random coil is independent of the concentration of helices in solution and the temperature at which the helices form. Helices formed in ethylene glycol are less stable than those formed in water solutions as, unlike water, ethylene glycol is too large a molecule to mediate interchain hydrogen bonds. The storage modulus has a universal dependence on helix concentration in both solvents but, due to a reduction in helix length, the critical concentration at which an elastic gel forms is smaller in ethylene glycol.Keywords
This publication has 27 references indexed in Scilit:
- Structural and mechanical properties of biopolymer gelsPublished by Springer Science and Business Media LLC ,2005
- Physical Gelation of Gelatin Studied with Rheo-OpticsMacromolecules, 2003
- New Insight into Agarose Gel Mechanical PropertiesBiomacromolecules, 2000
- Structural and Mechanical Properties of Crosslinked Drawn Gelatin FilmsJournal of Thermal Analysis and Calorimetry, 2000
- Infrared study of gelatin conformations in the gel and sol statesPolymer Gels and Networks, 1996
- Rheology of gelatin solutions at the sol-gel transitionPhysical Review E, 1996
- X‐ray diffraction of gelatin fibers in the dry and swollen statesJournal of Polymer Science Part B: Polymer Physics, 1990
- Gelation of aqueous gelatin solutions. I. Structural investigationJournal de Physique, 1988
- Equilibrium and dynamic studies of the disorder–order transition of kappa carrageenanJournal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1983
- Collagen structure in solution. I. Kinetics of helix regeneration in single-chain gelatinsBiochemistry, 1970