Advances in Chemistry Research. Volume 56 opens with a discussion on silica particles surface-modified by polyfunctional fragments containing acidic amino groups, specified for biomedical applications. Approaches to the immobilization/surface assembly of oligonucleotides on the surface of silica nanoparticles to create hybrid organic-inorganic particles are also considered. Following this, the authors investigate antituberculous compounds: isoni zid, pyrazinamid, salinazid, vanilin isoniazid and their bioactive structural analog, p-aminobenzoic acid. The solubility of drug substances a key parameter concerning formulation development in the pharmaceutical industry. The results of the application of the inversed Kirkwood-Buff integrals method to aqueous mixtures of many organic solvents as well as non-aqueous mixtures of such solvents are presented. Comparison with another method that yields similar information, the quasi-lattice quasi-chemical method, is made. The authors discuss the most common component of water scale, calcium carbonate, the solubility of which falls with increasing temperature. Precipitated Ca CO3 may be a mixture of crystalline phases, amorphous and hydrated phases. The crystalline phases are calcite, aragonite and vaterite. Additionally, the authors provide a comprehensive review of several isolation techniques and analytical aspects for the quantitative determination of catechin. In the concluding review, the effects of magnetic field on liquid/solid inhomogeneous reaction in aqueous solution, i.e., metal deposition reaction and chemical garden reaction, are briefly discussed in terms of the magnetic force on paramagnetic Cu2+ ion and the Lorentz force on all ions.
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