Small molecule sorption and desorption in and out of iota-carrageenan gels
Yükleniyor...
Dosyalar
Tarih
2007-08
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Group
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Small molecule sorption and desorption in and out of Iota-Carrageenan was studied by using steady-state fluorescence (SSF) technique. Pyranine dissolved in water used as fluorescence probe. Fluorescence emission intensity, I-p from pyranine was monitored for studying sorption and desorption processes at various temperatures. The Fickian model was applied to produce sorption, D-s, early desorption, D-ed, and desorption, D-d, coefficients. Corresponding activation energies were obtained and found to be 20.5 kJ mol(-1), 7.0 kJ mol(-1) and 34.9 kJ mol(-1), respectively. The observed D-ed value is an order of magnitude smaller than the D-s and D-d coefficients. On the other hand, sorption processes were shown to be twice as fast as desorption processes.
Açıklama
Anahtar Kelimeler
Sorption, Desorption, Carrageenan, Fluorescence, Tansient fluorescence technique, Poly(methyl methacrylate) gels, Photon transmission, Kinetics, Transition, Dynamics, Release, Helices, Dissolution, Thermal effects, Water, Fickian models, Pyranines, Gels
Kaynak
Journal of Macromolecular Science, Part B: Physics
WoS Q Değeri
Q4
Q4
Q4
Scopus Q Değeri
Q3
Cilt
46
Sayı
4
Künye
Pekcan, M. Ö. & Ataman, E. (2007). Small molecule sorption and desorption in and out of iota-carrageenan gels. Journal of Macromolecular Science, Part B, 46(4), 705-715. doi:10.1080/00222340701388896
