Numerical computation of relaxation spectra from mechanical measurements in biopolymers

Vassilis Kontogiorgos, Bin Jiang, Stefan Kasapis

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


In the present investigation, a computational methodology to treat relaxation spectra from mechanical data is developed. To calculate the spectral function that represents the relaxation process of the material, three different regularization algorithms were tested using MATLAB. Two algorithms employ Tikhonov's regularization whereas the third investigative tool is an implementation of the CONTIN algorithm. These efforts improved the ability to look at data hence allowing utilization of the L-curve criterion in order to locate the optimum regularization parameter for accurate data inversion. Algorithms were first evaluated with hypothetical data followed by experimental datasets of hydrated gluten as a model biopolymer system. Essentially, algorithms converge on a specific relaxation spectrum that unveils the molecular features of gluten structure. The methodology described is not limited to mechanical measurements but should be used with any type of exponential decay in studies of relaxation processes. Crown

Original languageEnglish
Pages (from-to)130-136
Number of pages7
JournalFood Research International
Issue number1
Early online date16 Sep 2008
Publication statusPublished - 1 Jan 2009
Event15th Gums and Stabilisers for the Food Industry Conference - Wrexham, United Kingdom
Duration: 22 Jun 200926 Jun 2009
Conference number: 15


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