Abstract In the study, changes in the mass of concrete filled with polyacrylamide/Fe3O4 nanoparticles in an amount of 1–2% of the cement mass in sea and formation water were studied. Besides, by performing IR and X-ray characterization of the prepared samples, the chemical state of the polyacrylamide (PAA) and the nanoparticles in the structure was […]
Abstract The study describes the synthesis, thermal and spectral characteristics of tetra-μ2-phenylacetate complex of dimolybdenum – Мо2(O2CCH2C6H5)4 and its derivatives in the type [Мо2(O2CCH2C6H5)4]L2' [where L' = α-, β-picoline (α-, β-Pic), 4-vinylpyridine (4-VinPy), quinoline (Q). The comparison of IR spectra of the synthesized [Мо2(O2CCH2C6H5)4]L2' complexes with the spectra of liquid L' ligands reveals their great […]
Abstract The beta-lactams are recognized as effective antibiotics for treating infections, yet bacterial production of β-lactamase, which hydrolyzes the beta-lactam ring, can render these drugs inactive. Combining these antibiotics with a β-lactamase inhibitor, such as clavulanic acid, mitigates this resistance. In a docking study involving Temoniera-1 (TEM-1), 1pzp, we induced the synthesis of eight amide […]
Abstract A Schiff base ligand, 3-((6-amino-1,6-dihydropyridin-2-yl)imino)indolin-2-one, was synthesized by condensing isatin with 2,6-diaminopyridine in this study. Elemental analysis, NMR spectroscopy, and infrared spectroscopy enabled confirmation of the structure of the pyridine- incorporated ligand. Additional coordination compounds of this ligand with Mn(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) metals were synthesized with metal-to-ligand proportions verified through […]
Abstract From the phase diagram it is clear that the Fe0,67Sb0,33 – Pb system is quasi-binary and has a eutectic type of phase formation. The solid solution region with a boundary of 4 mol% Pb at 300K was discovered in the system. Based on the temperature dependence of the contact resistance of the eutectic Fe0,67Sb0,33 […]
Abstract Hydrogen is an attractive automotive fuel because it is carbon-free, abundantly available from water, and has an exceptional mass-energy density. Hydrogen storage has become a trendy topic in recent years with its ability to design low-cost, lightweight materials that can reversibly and rapidly store hydrogen near ambient conditions. Various materials-based systems, such as metal […]
Abstract In the study, the process of anaerobic thermal processing of polymer fraction of municipal solid waste using a horizontal and vertical type of reactor has been developed in order to obtain a new carbon sorbent. The productivity of carbon material by the horizontal method is 20%, while vertical type of reactor is about 30%. […]
Abstract Magnetron sputtering is a well-known method of obtaining various coatings and surface modifications, but nowadays it is successfully used for the synthesis of electrocatalysts. One of the main advantages of the method is the possibility to vary the parameters during the process, such as the mode (direct current sputtering, pulsed medium-frequency sputtering, high radio […]
Abstract β-Lactams, such as penicillins and cephalosporins, have long been recognized as the most effective antibiotics for the treatment of infectious diseases. However, the major limitation to their effectiveness is the bacterial production of β-lactamase enzymes, which hydrolyze the β-lactam ring in these drugs, rendering them inactive. To overcome this resistance mechanism, β-lactamase inhibitors, such […]
Abstract The catalytic oxidation reaction between Coomassie Brilliant Blue and N-bromosuccinimide was used in an acidic medium to develop a spectrophotometric method for the estimation of dopamine and methyldopa in their pure forms and in pharmaceutical preparations. The developed method exhibited high sensitivity, with molar absorptivity values of 1.77 × 104 and 2.97 × 104 […]