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A new translucent cement, the product of the reaction between ion‐leachable glass and an aqueous solution of polyacrylic acid, is described. Its properties, with particular reference to dental applications, are reported and a proposed setting mechanism is advanced.

Grown under saline conditions, Suaeda maritima accumulates Na(+) and Cl(-) into its leaves, where individual mesophyll cells behave differently in their compartmentation of these ions. Measurements of ion concentrations within selected subcellular compartments show that freeze-substitution with dry sectioning is a valuable preparative technique for analytical electron microscopy of highly vacuolate plant material. Using this approach, absolute estimates were made of Na(+), K(+) and Cl(-) concentrations in the cytoplasm, cell walls, chloroplasts and vacuoles of leaf mesophyll cells.

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The preparation of a large number of novel fluorine-containing aluminosilicate glasses is reported along with the properties of cements formed by their reaction to aqueous solutions of poly- (acrylic acid) (PAA).