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Materials, synthesis, and analysis 4,4′-Bipyridine, CCl 3 COOH, CHBr 2 COOH, Y 2 O 3 , La 2 O 3 , dimethylsulfoxide (DMSO), dimethylformamide (DMF), and methanol (MeOH) (anhydrous) p.a. were obtained from Aldrich and Lab-Scan. Water solutions of

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± 0.5 K, using 1 × 10 −3 mol L −1 solutions of complexes in methanol (MeOH), dimethylsulfoxide (DMSO) and dimethylformamide (DMF). The thermal properties of complexes were studied by TG, DTG and DTA techniques; TG, DTG and DTA curves were recorded on

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electrolytes in the mixtures of water with N , N -dimetylformamide and dimethylsulfoxide (DMSO) as well as with organic substances which do not contain a non-polar group in their molecules, like formamide and urea, run monotonously within the whole range of

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Kim YS, Tsao D, Siddiqui B, Whitehead JS, Arnstein P, Bennett J, Hicks J: Effects of sodium butyrate and dimethylsulfoxide on biochemical properties of human colon cancer cells. Cancer 45, 1185–1192 (1980

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), methanol (MeOH), and dimethylsulfoxide (DMSO) were obtained from Sigma-Aldrich (St. Louis, MO, USA). HPLC-grade water (resistivity 18.2 MΩ cm) was produced by purification of distilled water with a Milli-Q gradient system (Billerica, MA, USA). All the other

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eluents such as acetone, chloroform, DMF, dimethylsulfoxide, ethyl acetate, methylene chloride and THF (and any basic solvent modifiers) may destroy the CSP if they are present, even in residual quantities, in the system, and (ii) the entire HPLC system

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