%0 Journal Article %1 Draget1996 %A Draget, K. I. %A Skjak-Braek, G. %A Christensen, B. E. %A Gaserod, O. %A Smidsrod, O. %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB %D 1996 %I ELSEVIER SCI LTD %J Carbohydr. Polym. %K ;; [ISI:] gelling properties %N 3 %P 209 -- 215 %T Swelling and partial solubilization of alginic acid gel beads in acidic buffer %V 29 %X Swelling behaviour of alginic acid gel beads with different chemical composition, molecular weight and size was studied in acetate buffer at pH 4. A correlation was observed between the swelling behaviour in this buffer and the equilibrium properties of alginic acid gels. High contents of long L-guluronic acid blocks (G-blocks), known to give a high acid gel strength, reduced the rate of swelling and also the amount of solubilized alginate molecules leaching out of the gel beads. Compared to the original alginate, the leaching molecules had a lower average molecular weight, higher content of mannuronic acid residues and a reduced average length of G-blocks. Swelling capacity, rate of swelling and solubility of alginic acid seemed to depend on a balance between the tendency of homopolymeric blocks to form intermolecular junction zones, and the tendency of alginate to reduce the chemical potential of water. As expected, swelling rate increased with increasing temperature and decreasing bead size. Copyright (C) 1996 Elsevier Science Limited.

@article{Draget1996, __markedentry = {[phpts:6]}, abstract = {Swelling behaviour of alginic acid gel beads with different chemical composition, molecular weight and size was studied in acetate buffer at pH 4. A correlation was observed between the swelling behaviour in this buffer and the equilibrium properties of alginic acid gels. High contents of long L-guluronic acid blocks (G-blocks), known to give a high acid gel strength, reduced the rate of swelling and also the amount of solubilized alginate molecules leaching out of the gel beads. Compared to the original alginate, the leaching molecules had a lower average molecular weight, higher content of mannuronic acid residues and a reduced average length of G-blocks. Swelling capacity, rate of swelling and solubility of alginic acid seemed to depend on a balance between the tendency of homopolymeric blocks to form intermolecular junction zones, and the tendency of alginate to reduce the chemical potential of water. As expected, swelling rate increased with increasing temperature and decreasing bead size. Copyright (C) 1996 Elsevier Science Limited.}, added-at = {2011-11-04T13:47:04.000+0100}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB}, author = {Draget, K. I. and Skjak-Braek, G. and Christensen, B. E. and Gaserod, O. and Smidsrod, O.}, biburl = {https://www.bibsonomy.org/bibtex/2d28eb5f264258b2dca93dffba0071f17/pawelsikorski}, citedref = {ATKINS EDT, 1971, J POLYM SCI POL LETT, V9, P311 ; DORIAN R, 1994, 13266, WO ; DRAGET KI, 1994, CARBOHYD POLYM, V25, P31 ; GRASDALEN H, 1983, CARBOHYD RES, V118, P255 ; HAUG A, 1964, THESIS NORWEGIAN I T ; MARTINSEN A, 1989, BIOTECHNOL BIOENG, V33, P79 ; MOE ST, 1993, MACROMOLECULES, V26, P3589 ; SKJAKBRAEK G, 1989, CARBOHYD POLYM, V10, P31 ; SKJAKBRAEK G, 1989, CARBOHYD RES, V185, P131 ; STOKKE BT, 1991, MACROMOLECULES, V24, P4637}, interhash = {786f62ddfc08a92ac2be839c6dd63d84}, intrahash = {d28eb5f264258b2dca93dffba0071f17}, isifile-dt = {Article}, isifile-ga = {VR388}, isifile-j9 = {CARBOHYD POLYM}, isifile-nr = {10}, isifile-pi = {OXFORD}, isifile-rp = {Draget, KI, NORWEGIAN UNIV SCI & TECHNOL,DEPT BIOTECHNOL,NORWEGIAN ; BIOPOLYMER LAB,N-7034 TRONDHEIM,NORWAY.}, isifile-sc = {Chemistry, Applied; Chemistry, Organic; Polymer Science}, isifile-tc = {16}, issn = {0144-8617}, journal = {Carbohydr. Polym.}, keywords = {;; [ISI:] gelling properties}, language = {English}, month = MAR, number = 3, owner = {phpts}, pages = {209 -- 215}, publisher = {ELSEVIER SCI LTD}, size = {7 p.}, sourceid = {ISI:A1996VR38800003}, timestamp = {2011-11-04T13:47:09.000+0100}, title = {Swelling and partial solubilization of alginic acid gel beads in acidic buffer}, volume = 29, year = 1996 }