Abstract
The amount of unfrozen water (UFW) associated with linear and cyclic (1→4)- α- d-glucans and oligomers thereof, including maltopentaose, two enzymatically synthesized amyloses; A-55 ( M w=54,500) and A-820 ( M w=820,000), three cyclodextrins; α-CD, β-CD and γ-CD and two cycloamyloses; CA-5 ( M w=4700) and CA-13 ( M w=13,100) were determined by differential scanning calorimetry (DSC). UFW, estimated from a plot of the melting enthalpy of ice against the weight fraction of water, showed that the glucans examined contain surprisingly different amounts of UFW. The molar ratio of UFW per glucose residue was increased in the order of α-CD (1.24), β-CD (1.78), γ-CD (1.96), A-55 (2.77), A-820 (2.98), CA-5 (2.93) and CA-13 (3.52). These values can be interpreted in terms of their hydrated conformational structures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
