Russian Journal of Applied Chemistry最新文献

{"title":"Hydrogels Based on a L-Cysteine–Silver Nitrate Aqueous Solution with Sodium Alginate","authors":"N. A. Bogachenkov,&nbsp;G. R. Zenikov,&nbsp;S. D. Khizhnyak,&nbsp;A. I. Ivanova,&nbsp;P. M. Pakhomov","doi":"10.1134/S1070427226040026","DOIUrl":"10.1134/S1070427226040026","url":null,"abstract":"<p>Hydrogels based on a supramolecular low-concentrated gel-precursor―a cysteine–silver solution (CSS)―and the polysaccharide sodium alginate (SA), which is a polyanion, were obtained in this work. Gelation initiated in the cysteine–silver solution by the polysaccharide or by the MgSO₄ electrolyte anion was studied in various systems (CSS–SA, CSS–SA–MgSO₄, CSS–MgSO₄) using vibroviscometry, UV spectroscopy, dynamic and electrophoretic light scattering, and scanning electron microscopy. It was found that the introduction of SA into the cysteine–silver solution at concentrations ranging from 0.01 to 0.05 mg/mL does not lead to hydrogel formation; gels are formed only in the presence of a sulfate-containing electrolyte at a concentration of 0.3 to 0.6 mM, but they are not strong and are easily disrupted by mechanical action. UV spectroscopy showed that in the gel-precursor spectrum, under the influence of SA macromolecules, the intensity of the absorption bands at ~312 and ~390 nm decreases due to a change in the geometry of the cluster chains of silver mercaptide [---Ag–S(R)—Ag–S(R)---]ₙ. According to dynamic and electrophoretic light scattering data, positively charged aggregates are formed in the CSS–SA system due to electrostatic interactions between the chain structures of CSS and SA molecules.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 4","pages":"193 - 202"},"PeriodicalIF":0.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creation of Ion-Selective Electrodes for Effective Control of Environmental Contamination with Antibiotics","authors":"T. V. Kryukov,&nbsp;M. A. Feofanova,&nbsp;A. Yu. Chesnokov,&nbsp;L. N. Tolkacheva,&nbsp;V. M. Nikolskii","doi":"10.1134/S1070427226040051","DOIUrl":"10.1134/S1070427226040051","url":null,"abstract":"<p>The danger of environmental pollution with classical complexons can be overcome by replacing them with environmentally friendly complexons, and the danger of nature pollution with antibiotics is eliminated only by the destruction of the latter. Therefore, careful control of them in the environment is necessary. Studies have shown that created ion-selective electrodes (ISEs), in which REE complexes with cefazolin serve as an electroactive substance, are promising in terms of use for determining antibiotics in microvolume samples. The operability of the electrodes was tested at model facilities.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 4","pages":"227 - 230"},"PeriodicalIF":0.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Copper-Chromium Catalyst for the Hydrogenation of Furfural to Furfuryl Alcohol in Various Modes","authors":"A. Sumina,&nbsp;S. Selishcheva,&nbsp;V. Sosnina,&nbsp;V. Yakovlev","doi":"10.1134/S1070427225602554","DOIUrl":"10.1134/S1070427225602554","url":null,"abstract":"<p>This work presents a detailed study of an industrial CuCr catalyst used to produce furfuryl alcohol from furfural. The catalyst was tested in a flow-type reactor under two modes: gas-phase and liquid-phase. We determined the optimal process parameters: <i>T =</i> 100°C, <i>P</i>_H2(excess) = 0.4 atm for gas-phase and <i>P</i>_H2 = 50 atm for liquid-phase, <i>V</i>_cat = 4.00 cm³, <i>d</i>_grain = 1.00–0.80 mm, mixture with quartz 1: 1 (vol.), GHSV = 265 h^–1 (LHSV = 1 h^–1), furfural: H₂ ratio = 1 : 20 (vol.), and conducted long-term tests (50–100 h). The catalyst demonstrated high stability in the liquid-phase process and exhibited excellent reaction parameters ~100% furfural conversion and &amp;gt;99.4% furfuryl alcohol selectivity for 50 h. A comprehensive set of physicochemical methods was used to determine the phase composition of the catalyst, as well as the characteristics of active component formation and the reasons for deactivation during overheating and throughout the process.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 4","pages":"203 - 215"},"PeriodicalIF":0.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of Ultrafiltration Separation of Water–Oil Emulsion by Polyethersulfone Membranes","authors":"M. G. Akhmadiev,&nbsp;V. O. Dryakhlov,&nbsp;I. G. Shaikhiev","doi":"10.1134/S1070427226040063","DOIUrl":"10.1134/S1070427226040063","url":null,"abstract":"<p>A study was conducted of ultrafiltration separation of a water-in-oil emulsion based on I-20A oil using polyethersulfone membranes with a cut-off particle mass of 10–300 kDa. The water-in-oil emulsion composition was as follows, % by volume: oil 20 surfactant of the Neonol AF 9-10 brand 2, distilled water 78. Separation was carried out on a laboratory ultrafiltration unit in the cross-flow mode, the volume of the separated mixture was 100 cm³, the process pressure was 2 atm. The efficiency of emulsion separation and membrane productivity were determined as operational characteristics depending on the sizes of particles cut off by the membranes. The effect of applied pressure and pore size on the productivity of polyethersulfone membranes for distilled water was determined. The obtained graphical dependencies were interpolated using Lagrange polynomials and expressions describing the change in productivity values ​​from the pore size at different values ​​of the applied pressure were determined. Similar graphical dependencies of the change in membrane productivity during separation of water-in-oil emulsion at different values ​​of the applied pressure in the system were obtained and interpolated using Lagrange polynomials. The effect of the membrane pore size on the COD values ​​of the filtrates was also estimated depending on the pressure applied to the system. It was revealed that the efficiency of the ultrafiltration process decreases with increasing pressure and filter pore size, since the amount of organic components in the resulting filtrate increases according to the obtained COD values. It was concluded that the obtained analytical expressions will allow, without conducting many similar experiments, to obtain the process parameters depending on the initial data.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 4","pages":"231 - 236"},"PeriodicalIF":0.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Non-Stationary Electrolysis in Deposition Corrosion-Resistant Zinc–Nickel, Zinc–Nickel–Cobalt Alloys","authors":"E. V. Chentsova,&nbsp;N. D. Solov’eva","doi":"10.1134/S1070427225600439","DOIUrl":"10.1134/S1070427225600439","url":null,"abstract":"<p>A promising direction for modifying the properties of electrodeposited coatings is the use of non-stationary electrolysis and the introduction of an additional alloying component. The effect of the reverse potential polarization mode parameters on the composition and corrosion resistance of Zn–Ni, Zn–Ni–Co alloys was studied. The coatings were deposited on a steel support (St45) in a sulfate-glycinate solution. The alloys were studied by X-ray diffraction, X-ray fluorescence and gravimetric analysis, scanning electron microscopy. It is established that the use of the reverse electrolysis mode contributes to the production of finer crystalline coatings with a high Ni content in the alloy. The inclusion of Co in the Zn–Ni alloy, the use of the reverse polarization mode contributes to an increase in its corrosion resistance by ~2 times at a thickness of 5‒10 μm.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 4","pages":"187 - 192"},"PeriodicalIF":0.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to: Study on the Detection of Copper Ions in Water by Phycoerythrin-Nitrocellulose Test Paper","authors":"Jionghua Xiang,&nbsp;Qinying Lai,&nbsp;Qiming Wu,&nbsp;Yucang Zhang,&nbsp;Haiqi Wang","doi":"10.1134/S1070427226030067","DOIUrl":"10.1134/S1070427226030067","url":null,"abstract":"","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 3","pages":"186 - 186"},"PeriodicalIF":0.6,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147558887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase Equilibria of the Ternary System Water–Phosphoric Acid–Methyl Isobutyl Ketone at 298.15, 308.15, and 318.15 K","authors":"Hamid El Maazouzi,&nbsp;Radouane Chatit,&nbsp;Abdessamad Tounsi,&nbsp;Brahim Messnaoui","doi":"10.1134/S1070427225600725","DOIUrl":"10.1134/S1070427225600725","url":null,"abstract":"<p>Experimental data were obtained for the extraction of phosphoric acid (PA) using Methyl Isobutyl Ketone (MIBK) at different temperatures (25, 35, and 45°C) under atmospheric pressure. The experimental data enable us to clarify the discrepancy between the reported data in the literature. It is observed that as the temperature increases from 25 to 45°C, the heterogeneous region shows a slight broadening. The measured data of tie lines were correlated with the Non-Random Two-Liquid (NRTL) model. To ensure the reliability of the optimized parameters, a Graphical User Interface tool was employed for model parameter verification. Tie line coordinates were then calculated based on the NRTL model, and the resulting data were compared against experimental data to validate the accuracy of the calculated results.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 3","pages":"152 - 164"},"PeriodicalIF":0.6,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of High-Performance Supplementary Cementitious Materials Using NaOH Activated Calcined Metakaolin","authors":"Nan Zhou,&nbsp;Geng Li,&nbsp;Fei Song,&nbsp;Tao Liao,&nbsp;Yuyang Su,&nbsp;Yanhui Li,&nbsp;Deng Chen","doi":"10.1134/S1070427225601081","DOIUrl":"10.1134/S1070427225601081","url":null,"abstract":"<p>To improve the latent hydraulicity of metakaolin (MK), sodium hydroxide (NaOH) was added at varying dosages(0-0.5wt%) during the calcination process. Microstructural changes in MK during calcination and subsequent hydration with Portland cement (OPC) were analyzed using thermogravimetric analysis (TG), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The results indicate that after calcination, Na is predominantly distributed within approximately 100 nm of the MK surface, leading to an altered amorphous structure of MK, which significantly enhances its latent hydraulicity. The 28-day compressive strength of the paste prepared with 0.05 wt% NaOH-modified MK reached 82.63 MPa, equivalent to 93% of OPC’s compressive strength, whereas unmodified MK yielded only 73% of OPC’s strength. With increasing NaOH content, the compressive strength of the paste slightly decreased but remained above 80% of OPC’s compressive strength. The modified MK exhibits strong compatibility with OPC and stable performance, and fluctuations in NaOH dosage do not cause a sharp decline in properties. The modified MK accelerated the hydration reaction of OPC, generating additional calcium silicate hydrate through synergistic effects, thereby optimizing the microstructure of the cementitious system.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 3","pages":"133 - 142"},"PeriodicalIF":0.6,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of Complex Formation of 2,6-Diisobornyl-4-methylphenol with Aromatic Solvents by 1H NMR and IR Spectrometry","authors":"R. A. Sadykov,&nbsp;G. D. Safina,&nbsp;S. L. Khursan,&nbsp;A. V. Kuchin","doi":"10.1134/S1070427226030043","DOIUrl":"10.1134/S1070427226030043","url":null,"abstract":"<p>The ¹H NMR spectra of 2,6-diisobornyl-4-methylphenol (<b>I</b>) revealed a concentration dependence of the hydroxyl proton signal, δ_H(OH), that is unusual for sterically hindered phenolic antioxidants. In inert cyclohexane, a small but reliably measured upfield shift of this signal is observed with increasing concentration of <b>I</b>. The same dependence is observed in aromatic solvents (toluene, mesitylene), but the effect is significantly larger. Based on these data, as well as the results of IR spectral measurements and quantum chemical DFT calculations, it is shown that in aromatic solvents, the hydroxyl group of phenol <b>I</b> engages in an OH···π interaction with the π-electrons of the solvent, which causes the upfield shift of δ_H(OH). In the inert solvent, the OH···π bond is formed as a result of the interaction of the OH group with the π-electrons of another molecule of <b>I</b>. With increasing concentration of the aromatic solvent, the δ_H(OH) value asymptotically approaches a limit of ~4.27 ppm in toluene and ~4.03 ppm in mesitylene. In the IR spectrum of a solution of <b>I</b> in carbon tetrachloride, the main OH stretching vibration band, ν(O–H), is observed at 3606.9 ± 0.1 cm^–1 as a symmetric peak, corresponding to a hydroxyl group free from hydrogen bonding. In mesitylene, in addition to the main band, a broad shoulder appears in the low-frequency region of the spectrum. Decomposition of the complex signal made it possible to identify a new absorption band for the OH group at 3574.0 ± 0.7 cm^–1, confirming the presence of an OH···π contact between <b>I</b> and the aromatic solvent. DFT modeling of the interaction of <b>I</b> with toluene and mesitylene indicates that the phenolic fragment is initially planar, while in the mesitylene complex, the OH group moves out of the phenol plane by 26°, which further confirms its participation in intermolecular interactions. The distance between the H atom of the hydroxyl group and the nearest three carbon atoms of the aromatic ring of mesitylene is only 2.7–2.9 Å, which is consistent with noticeable OH···π bonding. Similar structural motifs are observed for the toluene–<b>I</b> complex. The low-frequency shift of ν(O–H) by 33 cm^–1 upon complex formation is well reproduced by the O–H vibration frequency calculated in the harmonic approximation, which yields Δν(O–H) = 42 cm^–1. Finally, the GIAO calculation of the relative change in the chemical shift of the hydroxyl proton, Δδ_H, correctly conveys the observed trend: the signal shifts upfield by 0.4 ppm more in mesitylene than in toluene, which is in reasonable agreement with the experimentally observed difference in the limiting chemical shifts, Δδ_H = 0.24 ppm.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 3","pages":"165 - 171"},"PeriodicalIF":0.6,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bloom to Bioactive: Environmentally Benign Biosynthesis and Characterization of Silver Nanoparticles Mediated by Mangifera indica Flower Bud Extract and Evaluation of Their Antibacterial and Antifungal Activity","authors":"Shalini Tailor,&nbsp;Avinash Marwal","doi":"10.1134/S1070427226030055","DOIUrl":"10.1134/S1070427226030055","url":null,"abstract":"<p>Background: For the first time, plant-derived silver nanoparticles (SNPs) were synthesized from <i>Mangifera indica</i> flower buds using a green nanotechnology approach. Numerous phytoconstituents present in <i>M. indica</i> are well recognized for their diverse medicinal properties. This study presents a sustainable and non-toxic biogenic strategy for the development of nanoformulations with potential therapeutic applications. Objective: The aim of this research was to synthesize plant-based silver nanoparticles using aqueous extracts of <i>M. indica</i> flower buds collected from three mango orchards in the Banswara district of Udaipur, Rajasthan. The study further sought to characterize the synthesized nanoparticles and evaluate their antimicrobial efficacy against a panel of pathogenic microorganisms. Methods: The biosynthesized silver nanoparticles were characterized using multiple analytical techniques. Antimicrobial activity was evaluated against pathogenic microbial strains using the disc diffusion method. Phytochemical constituents were qualitatively analyzed. Statistical analysis was performed using one-way ANOVA, and <i>p</i>-values &lt;0.05 were considered statistically significant. Results: UV–Visible spectroscopy confirmed SNP formation, showing a characteristic surface plasmon resonance peak at 430–440 nm. Powder X-ray diffraction analysis revealed a crystalline structure with a face-centered cubic lattice and an average particle size of 10.45 nm. FTIR analysis identified functional groups involved in the reduction and capping of silver ions, which was further supported by phytochemical analysis. SEM and EDX analyses demonstrated predominantly spherical to flaky nanoparticles ranging from 82–86 nm, with silver as the major elemental component. The highest antimicrobial activity was observed against <i>Escherichia coli</i>, <i>Pseudomonas aeruginosa</i>, and <i>Candida glabrata</i>, particularly at higher SNP concentrations compared with the control drug. Conclusion: The findings indicate that <i>M. indica</i> flower buds are a promising biological source for the green synthesis of silver nanoparticles. Notably, the ability of flower-bud-derived SNPs to inhibit pathogenic microbial growth at relatively low concentrations, compared with conventional antibiotics, highlights their potential application as effective biogenic antimicrobial agents.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 3","pages":"172 - 185"},"PeriodicalIF":0.6,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}