Thermal Phase Transitions of IOTA Carrageenan in CaCl2 Solutions: A Fluorescence Study
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The fluorescence technique was employed to study thermal phase transitions of iota (-) carrageenan (IC) in CaCl2 solution. IC gels underwent coil to double helix (c-h) and double helix to dimer (h-d) transitions upon cooling. Upon heating IC gels presented dimer to double helix (d-h) and double helix to coil (h-c) transitions, showing hysteresis types of transition paths. Scattered light, Isc and fluorescence intensity, I, were monitored against temperature to determine phase transitions. Transition temperatures were determined from the derivative of the transition paths. The critical gel fraction exponent, , was measured and found to be in accord with the classic Flory-Stockmayer model.
Açıklama
Anahtar Kelimeler
Carrageenan, Fluorescence, Phase Transition, Polysaccharides, Scattered Light, Transition Temperature, Molecular-Size Distribution, Atomic-Force Microscopy, X-Ray-Diffraction, Kappa-Carrageenan, Gel Formation, Sol-Gel, Photon Transmission, Critical Exponents, Water System, Conformation
Kaynak
Journal Of Macromolecular Science Part B-Physics
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
50
Sayı
2
