Technologically contaminated water, formed during processing of coal slurries, finds its application in modern technological cycles enrichment. Limitation use untreated recycled water concentration plants is caused by a high degree mineralization various salts, presence insoluble solid particles and flotation reagents, coagulants flocculants. Part technical purified from mineral organic contami...

The toxicity of lead (Pb) to fungi in pure culture was influenced by several abiotic factors: pH, inorganic anions, clay minerals, and particulate (humic acid) and soluble organic matter. The toxicity of Pb was potentiated under acidic conditions (pH 5 and 6), and phosphate or carbonate anions reduced the toxicity, apparently as a result of the formation of sparingly soluble Pb salts. Clay mine...

Salt crystallization is one of the most dangerous forms degradation affecting frescoes. This phenomenon can lead to cracking, flaking and detachment pictorial layer, ultimately ruining work art. However, characterization soluble salts via chemical analysis be employed determine conditions artifact establish proper restoration and/or conservation strategies adopted. In this archaeometric study, ...

With the huge explored reserves of potash salts in Kazakhstan, there is still no production fertilizers, demand for which constantly growing. In this regard, research processing largest Chelkar deposit ore into fertilizers and an urgent problem. The article presents results washed decomposition with nitric acid suspension filtration. filtering properties granulometric composition insoluble resi...

Condensation of 2-chloro-3-nitrobenzoic acid with either 5-amino-7-methoxy-2,2-dimethyl-2H-chromene or 5-amino-2,2-dimethyl-2H-chromene afforded diphenylamines 14 and 15. Trifluoroacetic anhydride mediated cyclization gave the corresponding acridones 16 and 17, which were subsequently N-methylated and reduced to 11-aminoacronycine and 11-amino-6-demethoxyacronycine. These two amino compounds, w...

Syntheses of neutral 'buS2'-, 'S /and 'buS4'and of anionic buS: -complexes with various main group and transition metals are described. The complexes were prepared by reacting the neutral sulfur ligands or their alkali salts with the metal halide or alkoxide. The ligands coordinate to metal ions in normal as well as high oxidation states. No redox reactions occur in the latter case. The complex...

A number of derivatives of pleuromutilin (I) and of its degradation product, mutilin (II1, was prepared. The new monotosylation product of pleuromutilin (IIIc) served as the key substance for modification of the glycolic acid side chain. From the pleuromutilin monosuccinate (IIIk) water-soluble salts were obtained, among them the crystallized diethylaminoethanol salt that was investigated more ...

Increasingly, poorly soluble drug candidates are entering development, which has made identifying and selecting stable solid forms of an active pharmaceutical ingredient (API) with enhanced in vivo absorption more difficult. While pharmaceutical salts are the most common choice for solid forms, cocrystals are also known to improve “druggability” characteristics such as solubility, dissolution, ...

The reaction of methylcarbonate ionic liquids with H2S or H2Se offers a highly selective synthesis of analytically pure, well-defined and soluble hydrosulphide and hydroselenide organic salts of general interest. Among them, imidazolium hydrochalcogenides show an astonishingly high volatility for cation-aprotic ILs, which allows their quantitative sublimation below 100 °C/10(-2) mbar and actual...