| http://www.w3.org/ns/prov#value | - FIG. 7 is a graph showing the relationship between the molar ratios of malonic acid or tartaric acid to stannous ions in the test compositions comprising stannous fluoride, sodium fluoride and the dicarboxylic acid such as malonic acid or tartaric acid and the hardness of the decalcified teeth surfaces treated with these compositions;
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