ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Binding of calcium ions to polysaccharides from two freshwater microalgae, Palmella texensis (UTEX 1708) and Cosmarium turpinii (UTEX LB 1042) (PTP and CTP, respectively), and six industrial hydrocolloids was studied. The amount of bound calcium decreased with a decrease in pH below 6. Scatchard analysis showed that PTP, guar and locust bean had low calcium affinity and one type of binding site. Alginate bound calcium with the greatest affinity (k= 1.31 × 106) among the hydrocolloids examined and appeared to have one type of binding site. Gum arabic and CTP appeared to have two types of binding sites. The order of magnitude of uronic acid in each hydrocolloid did not agree with the order of calcium binding affinity as an intrinsic association constant indicating limited importance of the chemical nature of hydrocolloids to the effect of linear charge density.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1989.tb05986.x
