Abstract
Some aspects of protein adsorption were studied by measuring nitrogen uptake on 100–200 mesh bovine enamel. Using casein, it was found that after initial rapid adsorption uptake continued at a slowing rate for 60 min. Protein adsorption increased with decreasing size of enamel powder, with mesh size below 270 taking up more than 7 times that of 20–40 mesh particles. Less casein, bovine serum gamma globulin and gelatin were adsorbed from 0.01M phosphate buffer as the pH was raised from pH 6 to pH 8. Comparisons of the effect of various ions showed that potassium phosphate and sodium citrate interfered with adsorption of gelatin, while calcium chloride gave evidence of increasing it. Sodium fluoride gave ambiguous results.
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