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Establishing Regional Maximum Permissible Metal Concentrations in Lake Imandra
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130103
G. T. Frumin, E. S. Negodina
{"title":"Establishing Regional Maximum Permissible Metal Concentrations in Lake Imandra","authors":"G. T. Frumin,&nbsp;E. S. Negodina","doi":"10.1134/S1070363224130103","DOIUrl":"10.1134/S1070363224130103","url":null,"abstract":"<p>This study aims to substantiate regional maximum permissible concentrations (MPC) of metals in the water of Lake Imandra. Primary hydrochemical monitoring data from 1991 to 2018 were used for the calculations. The regional MPCs of six metals – total iron, copper, manganese, zinc, nickel, and aluminum – were determined. Three calculation methods were applied: the S.A. Patin method, the D.G. Zamolodchikov method, and the method developed by E.V. Venitsianov and co-authors. The S.A. Patin method uses two parameters: the average concentration (C<sub>avg</sub>) of the chemical element during the study period and its standard deviation (σ). The D.G. Zamolodchikov method relied on the upper and lower quartiles (UQ and LQ) of the distribution. The E.V. Venitsianov method employed three parameters: sample size, the upper quartile of the distribution, and the standard deviation for a quantile of approximately 0.75. The principle of sanitary maximalism was used to identify the optimal method for calculating regional MPCs. The E.V. Venitsianov method was found to be the most suitable. A strong correlation was observed between the natural logarithms of regional MPCs and the natural clarkes of metals in the Earth’s crust.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3515 - 3519"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361628","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}
引用次数: 0
The Negative Impact of the Boron Industry on Waters of the Rudnaya River (Primorsky Krai, Dalnegorsky District)
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S107036322413019X
A. I. Lysenko, V. P. Zvereva
{"title":"The Negative Impact of the Boron Industry on Waters of the Rudnaya River (Primorsky Krai, Dalnegorsky District)","authors":"A. I. Lysenko,&nbsp;V. P. Zvereva","doi":"10.1134/S107036322413019X","DOIUrl":"10.1134/S107036322413019X","url":null,"abstract":"<p>With a view to considering the boron industry on the waters of the Rudnaya river, the hydrochemical data of samples of river and drainage waters of tailing dumps selected seasonally were analyzed; their temperature, pH value and mineralization were determined. The use of the method of physico-chemical modeling in the Selector program made it possible to make mixing models of the studied waters on the geochemical barrier “natural surface—technogenic waters”, to determine the forms of migration of the main elements of ores and the main flotation reagent (H<sub>2</sub>SO<sub>4</sub>): Ca, B and S. The article presents the results of a seasonal assessment of the negative impact of the boron industry on the chemical composition of the waters of the Rudnaya River and shows the excess of MPC<sub>fish</sub> and MPC<sub>gen</sub> for Ca, P, Mn, Zn, B and S.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3586 - 3595"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361698","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}
引用次数: 0
Biosynthesis of Arachidonic Acid Using Mortierella Alpina VKPM F-1280 Fungus During Its Cultivation on Beet Pulp
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130292
A. A. Shakirova, N. I. Petukhova, V. V. Zorin
{"title":"Biosynthesis of Arachidonic Acid Using Mortierella Alpina VKPM F-1280 Fungus During Its Cultivation on Beet Pulp","authors":"A. A. Shakirova,&nbsp;N. I. Petukhova,&nbsp;V. V. Zorin","doi":"10.1134/S1070363224130292","DOIUrl":"10.1134/S1070363224130292","url":null,"abstract":"<p>Arachidonic acid and its derivatives are a very promising alternative to the use of environmentally hazardous chemical plant protection products. It is widely used as a growth stimulant and anti-stress resistance for agricultural plants. In this work, the possibility of using beet pulp, a by-product of the sugar beet industry, as an accessible and environmentally friendly substrate for obtaining practically important arachidonic acid during solid-phase cultivation of the <i>Mortierella alpina</i> VKPM F-1280 fungus was studied. It was shown that on a glycerol-containing media with beet pulp as the main polyunsaturated acid in the composition of others, essential arachidonic acid is formed (82% of the total acids). At the same time, the lipid content in the aerial mycelium does not exceed 10% (of absolute dry substance). The addition of oat flakes (30–60 g/L) into the media with beet pulp increases the lipid content in the aerial mycelium to 18% (of absolute dry substance).</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3655 - 3660"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362112","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}
引用次数: 0
Role of Solvent on Absorption Frequencies of S=O Group of Dimethyl Sulfoxide in Binary Mixtures
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S1070363224120016
A. A. Petrov, A. E. Klimovitskii, A. A. Akhmadiyarov, M. A. Varfolomeev, I. T. Rakipov
{"title":"Role of Solvent on Absorption Frequencies of S=O Group of Dimethyl Sulfoxide in Binary Mixtures","authors":"A. A. Petrov,&nbsp;A. E. Klimovitskii,&nbsp;A. A. Akhmadiyarov,&nbsp;M. A. Varfolomeev,&nbsp;I. T. Rakipov","doi":"10.1134/S1070363224120016","DOIUrl":"10.1134/S1070363224120016","url":null,"abstract":"<p>The work is devoted to the study of preferential solvation of dimethyl sulfoxide in binary solvents by IR spectroscopy. The absorption frequencies of stretching vibrations of S=O group of dimethyl sulfoxide in mixtures of carbon tetrachloride with acetone, acetonitrile and nitromethane at different ratios of components were determined. Shifts of absorption frequencies of stretching vibrations of the S=O group of dimethyl sulfoxide (Δν<sub>pref. solv</sub>) in binary solvents as a measure of preferential solvation were calculated. Solvation shells (<i>x*</i>) in binary solvents for the S=O group of dimethyl sulfoxide have been determined using absorption frequencies. The role of the second component of the binary mixture on the effects of preferential solvation and changes in solvation shell composition (<i>x*</i>) was discussed.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3133 - 3139"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109408","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}
引用次数: 0
Synthesis and Properties of New Water-Soluble Derivatives of Polyfunctional Pillar[5]arenes Containing Terminal Ammonium Groups
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S1070363224120144
P. V. Skvortsova, A. V. Pergat, Y. A. Valiullina, D. N. Shurpik, I. I. Stoikov, B. I. Khairutdinov
{"title":"Synthesis and Properties of New Water-Soluble Derivatives of Polyfunctional Pillar[5]arenes Containing Terminal Ammonium Groups","authors":"P. V. Skvortsova,&nbsp;A. V. Pergat,&nbsp;Y. A. Valiullina,&nbsp;D. N. Shurpik,&nbsp;I. I. Stoikov,&nbsp;B. I. Khairutdinov","doi":"10.1134/S1070363224120144","DOIUrl":"10.1134/S1070363224120144","url":null,"abstract":"<p>New water-soluble derivatives of polyfunctional pillar[5]arenes containing ammonium substituents were synthesized. It was shown that these compounds are capable of condensing an oligonucleotide to form transparent droplets in an aqueous solution via the liquid–liquid phase separation mechanism, which was confirmed by <sup>1</sup>H NMR spectroscopy and optical microscopy. The resulting oligonucleotide–pillar[5]aren systems can be useful for creating model structures of membraneless organelles intended to study their biophysical properties.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3241 - 3248"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109594","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}
引用次数: 0
Novel 1,2,3-Triazole Derivatives Boosting with Benzothiazole: Synthesis, Characterization and Efficiency Evaluation as Acid Corrosion Inhibitors
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S107036322412034X
M. H. Jebur, Q. A. H. Jaber
{"title":"Novel 1,2,3-Triazole Derivatives Boosting with Benzothiazole: Synthesis, Characterization and Efficiency Evaluation as Acid Corrosion Inhibitors","authors":"M. H. Jebur,&nbsp;Q. A. H. Jaber","doi":"10.1134/S107036322412034X","DOIUrl":"10.1134/S107036322412034X","url":null,"abstract":"<p>Novel 1,2,3-triazole compounds conjugated with benzothiazole moiety were synthesized and evaluated as corrosion inhibitors in acidic medium. The molecular structures of synthesized molecules were identified by FT-IR and NMR spectroscopy and elemental analysis (CHN). The weight loss test was used for investigating the products efficiency in an acidic environment. The test results revealed that one of these compounds showed encouraging inhibition efficiency of 95% with a corrosion rate of 60.53 at 75 ppm compared to other derivatives. In addition, polarization potential measurement disclosed that this compound achieved optimum values of surface coverage and IE with concentration of 75 ppm at 298 K and this largely agreed with the results obtained from the weight loss test.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3424 - 3430"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109749","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}
引用次数: 0
Click Reaction of Calcium Carbide-Derived Acetylene as a Direct Way to Chromophore- and Fluorophore-Substituted 1,2,3-Triazoles
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S107036322412003X
V. V. Voronin, M. S. Ledovskaya
{"title":"Click Reaction of Calcium Carbide-Derived Acetylene as a Direct Way to Chromophore- and Fluorophore-Substituted 1,2,3-Triazoles","authors":"V. V. Voronin,&nbsp;M. S. Ledovskaya","doi":"10.1134/S107036322412003X","DOIUrl":"10.1134/S107036322412003X","url":null,"abstract":"<p>1-[4-(Phenyldiazenyl)phenyl]-1<i>H</i>-1,2,3-triazole and 3-(1<i>H</i>-1,2,3-triazol-1-yl)-2<i>H</i>-chromen-2-one were synthesized for the first time by using the copper-catalyzed azide-alkyne cycloaddition reaction of azobenzene- and coumarin-substituted azides and calcium carbide-derived acetylene. Both azobenzene- and coumarin-substituted substrates afforded target 1,2,3-triazoles in good yields by reacting with acetylene generated from calcium carbide and water directly in the reaction vessel. This work demonstrates the enhanced applicability of the calcium carbide approach in organic synthesis, including the synthesis of chromophore- and fluorophore-substituted compounds.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3149 - 3154"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109412","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}
引用次数: 0
Chiral Ni(II) Dehydroalanine Complex in the Michael 1,4-Addition Reaction with Tryptanthrin CF3-Derivative
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S1070363224120132
Z. T. Gugkaeva, M. P. Stukalova, T. F. Savelyeva, A. T. Tsaloev, A. F. Smolyakov, V. A. Larionov, V. I. Maleev
{"title":"Chiral Ni(II) Dehydroalanine Complex in the Michael 1,4-Addition Reaction with Tryptanthrin CF3-Derivative","authors":"Z. T. Gugkaeva,&nbsp;M. P. Stukalova,&nbsp;T. F. Savelyeva,&nbsp;A. T. Tsaloev,&nbsp;A. F. Smolyakov,&nbsp;V. A. Larionov,&nbsp;V. I. Maleev","doi":"10.1134/S1070363224120132","DOIUrl":"10.1134/S1070363224120132","url":null,"abstract":"<p>We have developed a method for the asymmetric synthesis of nickel complexes with a 2,2,2-trifluoroethylaminotryptanthrin fragment containing two carbon stereocenters in the amino acid fragment. The complexes were obtained in the presence of catalytic amounts of base in 50–76% yields and diastereoselectivity (<i>dr</i>) up to 5 : 1. Decomposition of the Ni(II) complex in an acidic medium led to (3<i>S</i>,5<i>R</i>)-3-amino-5-(trifluoromethyl)pyrrolidin-2-one, a derivative analogue of L-norvaline.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3234 - 3240"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109428","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}
引用次数: 0
Synthesis, Characterization, and Biological Evaluation for New Derivatives Based on 2Сhloro-N-[4-(5-phenyl-1,3,4-oxadiazol-2-yl)phenyl]acetamide
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S1070363224120259
N. M. Jamel, K. A. Alheety, H. A. Hassan, J. H. Tomma, H. S. Ahmed, R. K. Baqir
{"title":"Synthesis, Characterization, and Biological Evaluation for New Derivatives Based on 2Сhloro-N-[4-(5-phenyl-1,3,4-oxadiazol-2-yl)phenyl]acetamide","authors":"N. M. Jamel,&nbsp;K. A. Alheety,&nbsp;H. A. Hassan,&nbsp;J. H. Tomma,&nbsp;H. S. Ahmed,&nbsp;R. K. Baqir","doi":"10.1134/S1070363224120259","DOIUrl":"10.1134/S1070363224120259","url":null,"abstract":"<p>A new compound, 2-chloro-<i>N</i>-[4-(5-phenyl-1,3,4-oxadiazol-2-yl)phenyl]acetamide, was obtained using a multi-step reaction and converted into the corresponding aldehyde. The latter was used for the synthesis of new Schiff bases derivatives. These compounds were characterized via physical and spectral data (IR, <sup>1</sup>H NMR) besides to CHN analysis of some of them and biological activity. Such types of activities as enzyme inhibition, antimicrobial and antifungal activity were studied.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3340 - 3347"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109601","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}
引用次数: 0
Synthesis and Antioxidant Activity of Some Thiazoles, Thiazolidinone, and Thiazolo[5,4-d]pyrimidine Derivatives
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-01-27 DOI: 10.1134/S1070363224120302
W. M. Basyouni, Kh. A. M. El-Bayouki, E. A. Mostafa
{"title":"Synthesis and Antioxidant Activity of Some Thiazoles, Thiazolidinone, and Thiazolo[5,4-d]pyrimidine Derivatives","authors":"W. M. Basyouni,&nbsp;Kh. A. M. El-Bayouki,&nbsp;E. A. Mostafa","doi":"10.1134/S1070363224120302","DOIUrl":"10.1134/S1070363224120302","url":null,"abstract":"<p>Various heterocyclic derivatives were obtained starting from ethyl 5-amino-2-(methylthio)thiazole-4-carboxylate. Antioxidant activity of the synthesized compounds was studied <i>in vitro</i> by using the DPPH test. The synthesized compounds showed absorption level of DPPH radicals in the 51.17–84.50% range. The most active 5-(hydrazinecarboxamido)-2-(methylthio)thiazole-4-carboxylate showed a remarkable scavenging activity (84.5%), followed by 5-(2-chloroacetamido)-2-(methylthio)thiazole-4-carboxylate, which showed scavenging activity of 66.28%. The remarkable activity of hydrazinecarboxamido-derivative could be attributed to the presence of hydrazine group in its structure which can donate a hydrogen atom to the DPPH radical.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 12","pages":"3386 - 3392"},"PeriodicalIF":0.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109748","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}
引用次数: 0
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