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For efficient extraction of cyclic amino acids, it has been proposed to use polymers based on N-vinylformamide. The extraction of phenylalanine, tyrosine, histidine, and proline in two-phase systems based on poly-N-vinylformamide and N-vinylformamide–N-vinylimidazole copolymer has been studied...
Calcium sulfate-based powders with contents of phosphate groups of 5, 10, and 20 mol % were synthesized by chemical precipitation from aqueous solutions. The products were studied by powder X-ray diffraction and IR spectroscopy. The synthesized powders were used to prepare cement pastes with...
Conditions (temperature, oxygen partial pressure in the gas atmosphere, and heating time) for the synthesis of polycrystalline layered manganites Ln2BaMn2O7 – δ (Ln = Pr, Nd) with an orthorhombic structure (Fmmm) and a specific oxygen non-stoichiometry were proposed for the first time. The...
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