Abstract
Abstract Kinetic studies of the amylose–iodine complex formation for the amylose of degree of the polymerization (DP) of 32 were made using the temperature-jump method. The reciprocal relaxation time increases with increase of the concentration of iodine and decreases with that of amylose. Based on these results, the reaction, H0+3I3−\ightleftharpoonsH3 was proposed as a plausible mechanism for the relaxation phenomenon, where H0 denotes the free helical segment of amylose and H3 the helical segment containing three I3−. The relaxation phenomena were observed for the amyloses of DP 42, 57, and 76, and analyzed by the same mechanism as that proposed in the case of DP 32. The rate constants for the forward and the backward reactions (kf and kb) were determined: the kf value increases with DP of amylose and the kb value decreases. Examination of the relaxation time and the relaxation amplitude suggested that the relaxation phenomenon is not based on the whole process of the amylose–iodine complex formation but on the H3 complex formation reaction which was shown to be the nucleation process.
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.
