Interaction of dye and polysaccharides |
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| Authors: | K Nishida T Akimoto H Uedaira |
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| Institution: | (1) Present address: Faculty of Technology, Tokyo University of Agriculture and Technology, Koganeishi, Tokyo, Japan;(2) Present address: The Textile Research Institute of Japanese Government, Yokohama, Japan |
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| Abstract: | Summary The interactions between amylose, amylodextrine and Benzopurpurine 4 B were studied by spectral and equilibrium dialyses methods. From the binding constant of amylose and amylodextrine, the molar changes in entropy and enthalpy for binding of the dye were calculated. Both H° andS° were positive. The positive value ofS° may be explained by the increase of flexibility of the polymer chain with increasing temperature.
Zusammenfassung Die Wechselwirkung zwischen Amylose, Amylodextrin und Benzopurpurin 4 B wurde mit den Methoden der Spektroskopie und der Gleichgewichtsdialyse untersucht. Die molare Änderung von Entropie und Enthalpie wurde aus der Bindungskonstante berechnet. H° und S° sind beide positiv. Sie sind damit zu erklären, daß die Kettenbeweglichkeit der Polymeren mit der Temperatur zunimmt.
The authors acknowledge the help of Dr.T. Kamata (The Government Chemical Industrial Research Institute, Tokyo) with the measurement of the molecular weight of the amylose. |
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