Critical Exponents of Kappa Carrageenan in the Coil-Helix and Helix-Coil Hysteresis Loops
Küçük Resim Yok
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The steady-state fluorescence technique was used to study coil-helix (sol-gel) and helix-coil (gel-sol) transitions of the kappa carrageenan-water system with various carrageenan contents. Fluorescence (I) and scattered light (I-sc) intensities were measured against temperature to determine critical phase transition temperatures and exponents. It was observed that the coil-helix transition temperatures, T-ch were much lower than the helix-coil (T-hc) transition temperatures due to the hysteresis of the phase transition loops. The gel fraction exponent (beta) was measured and found to be in accord with the classical Flory-Stockmayer model.
Açıklama
Anahtar Kelimeler
Carrageenan, Critical Exponent, Fluorescence, Hysteresis, Transition Temperature, Sol-Gel Transition, Molecular-Size Distribution, Phase-Transitions, Structural Characteristics, Gelation, Rheology, Model
Kaynak
Journal Of Macromolecular Science Part B-Physics
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
48
Sayı
4
