Critical behavior of thermal phase transitions of iota-carrageenan in CaCl2 solution
Yükleniyor...
Dosyalar
Tarih
2006-07-15
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In situ photon transmission method was applied to study thermal phase transitions of ?-carrageenan in CaCl2 solution. Coil-to-helix (c-h) and helix-to-dimer (h-d) transitions were detected upon cooling. An extra dimer-to-dimer (d-d) transition was observed as well during cooling at low-temperature region. Upon heating only dimer-to-helix (d-h) and helix-to-coil (h-c) transitions were detected. Photon transmission intensity, Itr was monitored against temperature to determine several phase transitions and transition temperatures. It was observed that the c-h transition in ?-carrageenan-CaCl2 system performs a crossover between 3D percolation to classical theory. Upon heating, the specific heat exponent over the d-h transition was extracted from the transmitted intensity data and was found to be 0.045.
Açıklama
Anahtar Kelimeler
Calcium compounds, Carrageenan, Coil-to-helix transition, Continuum mechanics, Cooling, Critical exponent, Data acquisition, Dimers, Gelation, Helix-to-dimer transition, Kappa carrageenan, Phase transition, Phase transitions, Photons, Specific heat
Kaynak
Physica A: Statistical Mechanics and its Applications
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
367
Sayı
Künye
Özbek, H. & Pekcan, M. Ö. (2006). Critical behavior of thermal phase transitions of iota-carrageenan in CaCl2 solution. Physica A: Statistical Mechanics and its Applications, 367, 69-78. doi:10.1016/j.physa.2005.09.073
