Structural filiations in the new complex titanates SrLiMTi4O11 (M=Cr, Fe).

Two new titanates of strontium, lithium and a 3d metal, with the composition SrLiMTi4O11 (M=Cr, Fe), have been discovered. Single crystals were obtained by spontaneous crystallization from a high-temperature solution with LiBO2 as the solvent. The structure of SrLiCrTi4O11 was refined in the orthorhombic space group Pnma (Z=4), while SrLiFeTi4O11 appeared to adopt a four-times larger orthorhombic unit cell with Pbcn (Z=16).

[Treatment of diabetics with metformin].

After a brief survey of the mechanism of biquanides treatment and their indications and contraindications with the peroral treatment of diabetes mellitus, the adverse effects of that treatment are stressed upon, manifested mainly in lactacidosis. The latter is indicated to be most frequently found during the treatment with tenformin, rarely -- with buformin and most rarely and in a lighter form -- with metformin. That uneven effect of biquanide preparations is associated with a certain difference in their pharmacodynamics and pharmacokinetics.