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Structure and Biological Properties of 2-Phenylhydrazone Derivatives of Thiazolopyrimidines 噻唑嘧啶2-苯基腙衍生物的结构和生物学性质
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-06-20 DOI: 10.1134/S0012500822030016
A. S. Agarkov, E. R. Gabitova, F. B. Galieva, A. S. Ovsyannikov, A. D. Voloshina, A. K. Shiryaev, I. A. Litvinov, S. E. Solovieva,  I. S. Antipin
{"title":"Structure and Biological Properties of 2-Phenylhydrazone Derivatives of Thiazolopyrimidines","authors":"A. S. Agarkov,&nbsp;E. R. Gabitova,&nbsp;F. B. Galieva,&nbsp;A. S. Ovsyannikov,&nbsp;A. D. Voloshina,&nbsp;A. K. Shiryaev,&nbsp;I. A. Litvinov,&nbsp;S. E. Solovieva,&nbsp; I. S. Antipin","doi":"10.1134/S0012500822030016","DOIUrl":"10.1134/S0012500822030016","url":null,"abstract":"<p>A number of 2-phenylhydrazone derivatives of thiazolo[3,2-<i>a</i>]pyrimidines has been synthesized, and their structure and biological activity have been studied. The structure of the obtained compounds has been confirmed by <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy and X-ray diffraction analysis. It has been found that hydrazone form with <i>Z</i> configuration of the C=N bond is typical for the obtained derivatives. Low cytotoxicity of the synthesized compounds toward normal and tumor cell lines has been shown.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"503 1","pages":"45 - 50"},"PeriodicalIF":0.8,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4799009","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: 4
Lymphocytosis and chronic lymphocytic leukaemia: investigation and management. 淋巴细胞增多症和慢性淋巴细胞白血病：调查和管理。
IF 4.4 4区 化学
Doklady Chemistry Pub Date : 2022-05-01 DOI: 10.7861/clinmed.2022-0150
Amarpreet Devi, Lieze Thielemans, Eleni E Ladikou, Taran K Nandra, Timothy Chevassut
{"title":"Lymphocytosis and chronic lymphocytic leukaemia: investigation and management.","authors":"Amarpreet Devi, Lieze Thielemans, Eleni E Ladikou, Taran K Nandra, Timothy Chevassut","doi":"10.7861/clinmed.2022-0150","DOIUrl":"10.7861/clinmed.2022-0150","url":null,"abstract":"<p><p>Lymphocytosis is a common blood-test finding. Establishing whether the cause of lymphocytosis is benign or malignant is key to managing patients appropriately. A lymphocytosis should always prompt clinical review including a thorough history, examination and appropriate preliminary investigations (blood tests, blood film). The majority of patients with chronic lymphocytic leukaemia (CLL) present incidentally due to a lymphocytosis found on routine blood tests. Patient outcomes vary considerably based on genetic pre-disposition and various prognostic markers (age, Binet or Rai staging, and B2-microglobulin). Although not curative, chemo-immunotherapy is an effective treatment strategy for the majority of CLL patients with progressive disease. More recently, novel oral therapies have been developed that target key signalling and apoptosis pathways and that are being used in relapse settings and as first-line treatments for certain patients.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"410 1","pages":"225-229"},"PeriodicalIF":4.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9135088/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72457484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of New Lithium-Conducting Copolymers and the Influence of Their Structure and Composition on Ionic Conductivity 新型锂导电共聚物的合成及其结构和组成对离子电导率的影响
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-04-28 DOI: 10.1134/S0012500822020021
D. O. Ponkratov, E. I. Lozinskaya, A. S. Shaplov, D. A. Khanin, E. S. Afanasyev, R. U. Takazova, Y. S. Vygodskii
{"title":"Synthesis of New Lithium-Conducting Copolymers and the Influence of Their Structure and Composition on Ionic Conductivity","authors":"D. O. Ponkratov,&nbsp;E. I. Lozinskaya,&nbsp;A. S. Shaplov,&nbsp;D. A. Khanin,&nbsp;E. S. Afanasyev,&nbsp;R. U. Takazova,&nbsp;Y. S. Vygodskii","doi":"10.1134/S0012500822020021","DOIUrl":"10.1134/S0012500822020021","url":null,"abstract":"<p>A new polymeric electrolyte with mobile charges of one type has been synthesized. It is a block copolymer with non-ionic block of poly(2,2,3,3,4,4,5,5-octafluoropentyl methacrylate), which improves mechanical performance, and ionic block as a random copolymer of lithium 1-[3-(methacryloxy)-propylsulfonyl]-1-(trifluoromethanesulfonyl)imide with poly(ethylene glycol) methacrylate. A possibility has been shown for the tuning of ionic conductivity in a wide range (from 1 × 10<sup>–10</sup> to 1 × 10<sup>–7</sup> S cm<sup>–1</sup>, 25°C) by varying the ratio of macromolecular weights of neutral and ionic blocks and concentration of lithium monomer units in the ionic block.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"502 2","pages":"29 - 36"},"PeriodicalIF":0.8,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5518287","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
Supramolecular Effects and Systems in Catalysis. A Review 催化中的超分子效应和系统。回顾
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-04-28 DOI: 10.1134/S0012500822010013
S. Z. Vatsadze,  A. L. Maximov,  V. I. Bukhtiyarov
{"title":"Supramolecular Effects and Systems in Catalysis. A Review","authors":"S. Z. Vatsadze,&nbsp; A. L. Maximov,&nbsp; V. I. Bukhtiyarov","doi":"10.1134/S0012500822010013","DOIUrl":"10.1134/S0012500822010013","url":null,"abstract":"<p>The major areas of development and application of supramolecular catalysis over the past five years are presented. Data on the use of macrocyclic receptors and supramolecular and coordination nanocapsules are analyzed. Advantages and specific features of the systems under study are demonstrated. It is concluded that supramolecular catalysis is an extremely rapidly developing area of modern chemistry. The most promising directions of development of this field are shown. </p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"502 1","pages":"1 - 27"},"PeriodicalIF":0.8,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5072858","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: 1
Study of the Structure, Mechanical Characteristics, and Antibacterial Properties of Corrosion-Resistant Steel Alloyed with Silver and Titanium 银钛合金耐蚀钢的结构、力学特性及抗菌性能研究
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-04-28 DOI: 10.1134/S001250082202001X
M. A. Kaplan, A. Yu. Ivannikov, S. V. Konushkin, E. O. Nasakina, A. S. Baikin, B. B. Kartabaeva, A. D. Gorbenko,  A. G. Kolmakov, M. A. Sevostyanov
{"title":"Study of the Structure, Mechanical Characteristics, and Antibacterial Properties of Corrosion-Resistant Steel Alloyed with Silver and Titanium","authors":"M. A. Kaplan,&nbsp;A. Yu. Ivannikov,&nbsp;S. V. Konushkin,&nbsp;E. O. Nasakina,&nbsp;A. S. Baikin,&nbsp;B. B. Kartabaeva,&nbsp;A. D. Gorbenko,&nbsp; A. G. Kolmakov,&nbsp;M. A. Sevostyanov","doi":"10.1134/S001250082202001X","DOIUrl":"10.1134/S001250082202001X","url":null,"abstract":"<p>A new medical antibacterial corrosion-resistant steel alloyed with silver and titanium was smelted. The optimal conditions for homogenizing annealing were selected to obtain a uniform structure and give rise to equiaxed grains. The mechanical properties, microstructure, and phase composition were studied. X-ray powder diffraction analysis showed that the steel without alloying elements after rolling has an austenitic structure. The alloying gave rise to a small amount of ferrite in the steel structure. Spectral analysis showed a uniform silver distribution throughout the alloy. It was determined that a steel sample containing silver and titanium has an antibacterial effect on the bacterial strain <i>Pseudomonas marginalis</i>.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"502 2","pages":"37 - 44"},"PeriodicalIF":0.8,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5518301","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: 2
Synthesis of Ta4HfC5 Ceramics with a Submicron Structure by Electro-Thermal Explosion under Pressure 加压电热爆炸法制备亚微米结构Ta4HfC5陶瓷
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-03-20 DOI: 10.1134/S0012500821120041
V. A. Shcherbakov, A. N. Gryadunov, I. E. Semenchuk, D. Yu. Kovalev, A. E. Sychev,  M. I. Alymov
{"title":"Synthesis of Ta4HfC5 Ceramics with a Submicron Structure by Electro-Thermal Explosion under Pressure","authors":"V. A. Shcherbakov,&nbsp;A. N. Gryadunov,&nbsp;I. E. Semenchuk,&nbsp;D. Yu. Kovalev,&nbsp;A. E. Sychev,&nbsp; M. I. Alymov","doi":"10.1134/S0012500821120041","DOIUrl":"10.1134/S0012500821120041","url":null,"abstract":"<p>Ultra-high-temperature Ta<sub>4</sub>HfC<sub>5</sub> ceramics with a submicron structure has been manufactured from a 4Ta + Hf + 5С powder mixture by electro-thermal explosion under pressure. The effect of the duration of mechanical activation of starting 4Ta + Hf powder mixtures on the structure of the resulting precursor has been studied. It has been demonstrated that mechanical activation in hexane for 40–60 min leads to amorphization of metals and nucleation of crystallites of the carbide phase with a cubic structure. This makes it possible to synthesize a single-phase solid solution of tantalum and hafnium carbides with a submicron structure in the course of an electro-thermal explosion.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"501 2","pages":"259 - 263"},"PeriodicalIF":0.8,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4796232","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: 1
Chemically Treated Carbon Nanofiber Materials for Supercapacitors 超级电容器用化学处理碳纳米纤维材料
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-03-20 DOI: 10.1134/S0012500821120016
A. E. Brester, V. V. Golovakhin, O. N. Novgorodtseva, N. I. Lapekin, A. A. Shestakov, A. V. Ukhina, I. Yu. Prosanov, E. A. Maksimovskii, M. V. Popov, A. G. Bannov
{"title":"Chemically Treated Carbon Nanofiber Materials for Supercapacitors","authors":"A. E. Brester,&nbsp;V. V. Golovakhin,&nbsp;O. N. Novgorodtseva,&nbsp;N. I. Lapekin,&nbsp;A. A. Shestakov,&nbsp;A. V. Ukhina,&nbsp;I. Yu. Prosanov,&nbsp;E. A. Maksimovskii,&nbsp;M. V. Popov,&nbsp;A. G. Bannov","doi":"10.1134/S0012500821120016","DOIUrl":"10.1134/S0012500821120016","url":null,"abstract":"<p>Carbon nanofibers obtained by catalytic decomposition of methane in a vibrated fluidized bed reactor were chemically treated to increase the specific capacitance of supercapacitors. The material was studied by transmission electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform IR spectroscopy, and cyclic voltammetry. The treatment was conducted in various media (H<sub>2</sub>SO<sub>4</sub>, HNO<sub>3</sub>, H<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>, and HCl) at 80°C for 6 h. The chemical treatment was accompanied by a significant weight loss (14–67 wt %) and oxidation of the material. Treatment in diluted nitric acid mainly led to the transfer of surface layers of disordered carbon into solution with their removal during washing, while treatment in concentrated acid was more conducive to oxidation of the material surface. The highest specific capacitance (50.6 F g<sup>–1</sup> at 2 mV s<sup>–1</sup> in 3.5 M H<sub>2</sub>SO<sub>4</sub> electrolyte) was attained when carbon nanofibers were treated with H<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"501 2","pages":"264 - 269"},"PeriodicalIF":0.8,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4797907","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: 6
Computer Modeling of the Integrated Chemical Engineering Process of Water Shutoff of High-Water-Cut Oil-Bearing Porous Rock Formations 高含水含油多孔岩层堵水综合化工过程的计算机模拟
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-03-20 DOI: 10.1134/S0012500821110045
V. P. Meshalkin, R. N. Yakubov, L. E. Lenchenkova, V. V. Chelnokov
{"title":"Computer Modeling of the Integrated Chemical Engineering Process of Water Shutoff of High-Water-Cut Oil-Bearing Porous Rock Formations","authors":"V. P. Meshalkin,&nbsp;R. N. Yakubov,&nbsp;L. E. Lenchenkova,&nbsp;V. V. Chelnokov","doi":"10.1134/S0012500821110045","DOIUrl":"10.1134/S0012500821110045","url":null,"abstract":"<p>A three-dimensional computer model was developed for the integrated chemical engineering process of water shutoff of a high-water-cut oil-bearing rock formation at given geophysical characteristics of the bottomhole formation zone and given rate and volume of a water shutoff solution injected into the formation. The model makes it possible to determine the parameters of filling of pores of the formation with the water shutoff solution, which are necessary for calculating the well’s oil and water production rates. The adequacy of the developed mathematical model was checked against the results of a comparative analysis of the calculated values of the water cut and the oil production rate with the actual well performance data after the water shutoff: the mean absolute errors in oil production rate and water cut were 0.5 t/day and 0.9%, respectively.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"501 1","pages":"243 - 247"},"PeriodicalIF":0.8,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5096274","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: 1
Synthesis and Crystal Structure of Iron(II) and Cobalt(III) Complexes with Hetarylhydrazone Derived from o-Diphenylphosphinobenzaldehyde and 1-Hydrazinophthalazine 邻二苯基膦苯甲醛和1-肼苯酞衍生的含铁(II)和钴(III)的乙基腙配合物的合成和晶体结构
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-03-20 DOI: 10.1134/S001250082112003X
L. D. Popov, S. A. Borodkin, V. V. Tkachev, A. N. Utenyshev, I. N. Shcherbakov,  S. M. Aldoshin
{"title":"Synthesis and Crystal Structure of Iron(II) and Cobalt(III) Complexes with Hetarylhydrazone Derived from o-Diphenylphosphinobenzaldehyde and 1-Hydrazinophthalazine","authors":"L. D. Popov,&nbsp;S. A. Borodkin,&nbsp;V. V. Tkachev,&nbsp;A. N. Utenyshev,&nbsp;I. N. Shcherbakov,&nbsp; S. M. Aldoshin","doi":"10.1134/S001250082112003X","DOIUrl":"10.1134/S001250082112003X","url":null,"abstract":"<p>Reaction of 1-phthalazinylhydrazone of <i>o</i>-diphenylphosphinobenzaldehyde (HL) with Fe(II) and Co(II) perchlorates has led to complexes of different composition and structure: [Fe(HL)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub> · H<sub>2</sub>O (<b>1</b>) and [CoL<sub>2</sub>](ClO<sub>4</sub>) · H<sub>2</sub>O (<b>2</b>) in spite of the use of salts with the same anion. Со<sup>2+</sup> ion undergoes oxidation to Co<sup>3+</sup> upon complexation. The structure of the complexes has been established by NMR spectroscopy in solution and by X-ray diffraction in crystal. X-ray diffraction has shown that complexing metal ions have octahedral structure. Compound <b>2</b> forms two independent molecules in crystal.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"501 2","pages":"249 - 254"},"PeriodicalIF":0.8,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4797852","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
Theoretical and Experimental Analysis of the Change in the Solid-Phase Particle Distribution in Process Equipment 工艺设备固相颗粒分布变化的理论与实验分析
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2022-03-20 DOI: 10.1134/S0012500821110033
V. P. Meshalkin, O. M. Flisyuk, N. A. Martsulevich, A. V. Garabadjiu
{"title":"Theoretical and Experimental Analysis of the Change in the Solid-Phase Particle Distribution in Process Equipment","authors":"V. P. Meshalkin,&nbsp;O. M. Flisyuk,&nbsp;N. A. Martsulevich,&nbsp;A. V. Garabadjiu","doi":"10.1134/S0012500821110033","DOIUrl":"10.1134/S0012500821110033","url":null,"abstract":"<p>A mathematical model of the change in the solid-phase particle size (mass) distribution was developed, according to which the rate of this change in a complex process can be represented as a superposition of the rates of less complex processes, such as coagulation, breakup, abrasion, etc. The proposed approach allows one to determine the particle size (mass) distribution function of the end product of both continuous-flow, and batch processes. Examples of using the proposed approach for solving specific, practically important problems were given, indicating its efficiency.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"501 1","pages":"239 - 242"},"PeriodicalIF":0.8,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4802323","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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