Effect of salt addition on the fractal structure of aggregates formed by heating dilute BSA solutions.
The fractal dimension, Df, of aggregates in a dilute BSA system with added salt was evaluated by static light scattering (SLS). A fractal structure was observed for the system with NaCl addition. The values of Df increased with increasing heating time and ionic strength. The values of Df were larger than those (Df = 1.8 or 2.1) predicted by the conventional cluster-cluster aggregation model, probably due to a "restructuring" of aggregates during the aggregation process. On the other hand, a fractal structure was not apparent for the system with added CaCl2.
Department of Applied Biological Chemistry, University of Tokyo, Japan.
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Kumagai
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Matsunaga
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Hagiwara
D000818:Animals; D002122:Calcium Chloride; D002417:Cattle; D017709:Fractals; D006358:Hot Temperature; D066298:In Vitro Techniques; D008027:Light; D046911:Macromolecular Substances; D009994:Osmolar Concentration; D012542:Scattering, Radiation; D012710:Serum Albumin, Bovine / Q000737:chemistry*; D012965:Sodium Chloride; D012996:Solutions
D046911:Macromolecular Substances; D012996:Solutions; D012710:Serum Albumin, Bovine; D012965:Sodium Chloride; D002122:Calcium Chloride